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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2714 | cejka | 1 | /* $NetBSD: eval.c,v 1.56 2000/05/22 10:18:46 elric Exp $ */ |
| 2 | |||
| 3 | /*- |
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| 4 | * Copyright (c) 1993 |
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| 5 | * The Regents of the University of California. All rights reserved. |
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| 6 | * |
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| 7 | * This code is derived from software contributed to Berkeley by |
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| 8 | * Kenneth Almquist. |
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| 9 | * |
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| 10 | * Redistribution and use in source and binary forms, with or without |
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| 11 | * modification, are permitted provided that the following conditions |
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| 12 | * are met: |
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| 13 | * 1. Redistributions of source code must retain the above copyright |
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| 14 | * notice, this list of conditions and the following disclaimer. |
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 16 | * notice, this list of conditions and the following disclaimer in the |
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| 17 | * documentation and/or other materials provided with the distribution. |
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| 18 | * 3. All advertising materials mentioning features or use of this software |
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| 19 | * must display the following acknowledgement: |
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| 20 | * This product includes software developed by the University of |
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| 21 | * California, Berkeley and its contributors. |
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| 22 | * 4. Neither the name of the University nor the names of its contributors |
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| 23 | * may be used to endorse or promote products derived from this software |
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| 24 | * without specific prior written permission. |
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| 25 | * |
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| 26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 36 | * SUCH DAMAGE. |
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| 37 | */ |
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| 38 | |||
| 39 | #include <sys/cdefs.h> |
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| 40 | #ifndef lint |
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| 41 | #if 0 |
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| 42 | static char sccsid[] = "@(#)eval.c 8.9 (Berkeley) 6/8/95"; |
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| 43 | #else |
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| 44 | __RCSID("$NetBSD: eval.c,v 1.56 2000/05/22 10:18:46 elric Exp $"); |
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| 45 | #endif |
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| 46 | #endif /* not lint */ |
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| 47 | |||
| 48 | #include <sys/types.h> |
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| 49 | #include <signal.h> |
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| 50 | #include <malloc.h> |
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| 51 | #include <unistd.h> |
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| 52 | |||
| 53 | /* |
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| 54 | * Evaluate a command. |
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| 55 | */ |
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| 56 | |||
| 57 | #include "shell.h" |
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| 58 | #include "nodes.h" |
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| 59 | #include "syntax.h" |
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| 60 | #include "expand.h" |
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| 61 | #include "parser.h" |
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| 62 | #include "jobs.h" |
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| 63 | #include "eval.h" |
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| 64 | #include "builtins.h" |
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| 65 | #include "options.h" |
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| 66 | #include "exec.h" |
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| 67 | #include "redir.h" |
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| 68 | #include "input.h" |
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| 69 | #include "output.h" |
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| 70 | #include "trap.h" |
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| 71 | #include "var.h" |
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| 72 | #include "memalloc.h" |
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| 73 | #include "error.h" |
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| 74 | #include "show.h" |
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| 75 | #include "mystring.h" |
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| 76 | #ifndef SMALL |
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| 77 | #include "myhistedit.h" |
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| 78 | #endif |
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| 79 | |||
| 80 | |||
| 81 | /* flags in argument to evaltree */ |
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| 82 | #define EV_EXIT 01 /* exit after evaluating tree */ |
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| 83 | #define EV_TESTED 02 /* exit status is checked; ignore -e flag */ |
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| 84 | #define EV_BACKCMD 04 /* command executing within back quotes */ |
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| 85 | |||
| 86 | MKINIT int evalskip; /* set if we are skipping commands */ |
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| 87 | STATIC int skipcount; /* number of levels to skip */ |
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| 88 | MKINIT int loopnest; /* current loop nesting level */ |
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| 89 | int funcnest; /* depth of function calls */ |
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| 90 | |||
| 91 | |||
| 92 | char *commandname; |
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| 93 | struct strlist *cmdenviron; |
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| 94 | int exitstatus; /* exit status of last command */ |
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| 95 | int oexitstatus; /* saved exit status */ |
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| 96 | |||
| 97 | |||
| 98 | STATIC void evalloop (union node *, int); |
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| 99 | STATIC void evalfor (union node *, int); |
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| 100 | STATIC void evalcase (union node *, int); |
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| 101 | STATIC void evalsubshell (union node *, int); |
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| 102 | STATIC void expredir (union node *); |
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| 103 | STATIC void evalpipe (union node *); |
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| 104 | STATIC void evalcommand (union node *, int, struct backcmd *); |
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| 105 | STATIC void prehash (union node *); |
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| 106 | STATIC int is_assignment_builtin (const char *); |
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| 107 | STATIC const char *get_standard_path (void); |
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| 108 | |||
| 109 | |||
| 110 | /* |
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| 111 | * Called to reset things after an exception. |
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| 112 | */ |
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| 113 | |||
| 114 | #ifdef mkinit |
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| 115 | INCLUDE "eval.h" |
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| 116 | |||
| 117 | RESET { |
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| 118 | evalskip = 0; |
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| 119 | loopnest = 0; |
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| 120 | funcnest = 0; |
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| 121 | } |
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| 122 | |||
| 123 | SHELLPROC { |
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| 124 | exitstatus = 0; |
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| 125 | } |
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| 126 | #endif |
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| 127 | |||
| 128 | |||
| 129 | |||
| 130 | /* |
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| 131 | * The eval commmand. |
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| 132 | */ |
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| 133 | |||
| 134 | int |
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| 135 | evalcmd(argc, argv) |
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| 136 | int argc; |
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| 137 | char **argv; |
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| 138 | { |
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| 139 | char *p; |
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| 140 | char *concat; |
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| 141 | char **ap; |
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| 142 | |||
| 143 | if (argc > 1) { |
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| 144 | p = argv[1]; |
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| 145 | if (argc > 2) { |
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| 146 | STARTSTACKSTR(concat); |
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| 147 | ap = argv + 2; |
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| 148 | for (;;) { |
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| 149 | while (*p) |
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| 150 | STPUTC(*p++, concat); |
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| 151 | if ((p = *ap++) == NULL) |
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| 152 | break; |
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| 153 | STPUTC(' ', concat); |
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| 154 | } |
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| 155 | STPUTC('\0', concat); |
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| 156 | p = grabstackstr(concat); |
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| 157 | } |
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| 158 | evalstring(p, EV_TESTED); |
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| 159 | } |
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| 160 | return exitstatus; |
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| 161 | } |
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| 162 | |||
| 163 | |||
| 164 | /* |
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| 165 | * Execute a command or commands contained in a string. |
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| 166 | */ |
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| 167 | |||
| 168 | void |
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| 169 | evalstring(s, flag) |
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| 170 | char *s; |
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| 171 | int flag; |
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| 172 | { |
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| 173 | union node *n; |
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| 174 | struct stackmark smark; |
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| 175 | |||
| 176 | setstackmark(&smark); |
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| 177 | setinputstring(s, 1); |
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| 178 | while ((n = parsecmd(0)) != NEOF) { |
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| 179 | evaltree(n, flag); |
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| 180 | popstackmark(&smark); |
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| 181 | } |
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| 182 | popfile(); |
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| 183 | popstackmark(&smark); |
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| 184 | } |
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| 185 | |||
| 186 | |||
| 187 | |||
| 188 | /* |
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| 189 | * Evaluate a parse tree. The value is left in the global variable |
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| 190 | * exitstatus. |
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| 191 | */ |
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| 192 | |||
| 193 | void |
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| 194 | evaltree(n, flags) |
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| 195 | union node *n; |
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| 196 | int flags; |
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| 197 | { |
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| 198 | if (n == NULL) { |
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| 199 | TRACE(("evaltree(NULL) called\n")); |
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| 200 | exitstatus = 0; |
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| 201 | goto out; |
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| 202 | } |
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| 203 | #ifndef SMALL |
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| 204 | displayhist = 1; /* show history substitutions done with fc */ |
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| 205 | #endif |
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| 206 | TRACE(("evaltree(0x%lx: %d) called\n", (long)n, n->type)); |
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| 207 | switch (n->type) { |
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| 208 | case NSEMI: |
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| 209 | evaltree(n->nbinary.ch1, flags & EV_TESTED); |
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| 210 | if (evalskip) |
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| 211 | goto out; |
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| 212 | evaltree(n->nbinary.ch2, flags); |
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| 213 | break; |
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| 214 | case NAND: |
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| 215 | evaltree(n->nbinary.ch1, EV_TESTED); |
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| 216 | if (evalskip || exitstatus != 0) { |
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| 217 | /* don't bomb out on "set -e; false && true" */ |
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| 218 | flags |= EV_TESTED; |
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| 219 | goto out; |
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| 220 | } |
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| 221 | evaltree(n->nbinary.ch2, flags | EV_TESTED); |
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| 222 | break; |
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| 223 | case NOR: |
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| 224 | evaltree(n->nbinary.ch1, EV_TESTED); |
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| 225 | if (evalskip || exitstatus == 0) |
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| 226 | goto out; |
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| 227 | evaltree(n->nbinary.ch2, flags | EV_TESTED); |
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| 228 | break; |
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| 229 | case NREDIR: |
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| 230 | expredir(n->nredir.redirect); |
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| 231 | redirect(n->nredir.redirect, REDIR_PUSH); |
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| 232 | evaltree(n->nredir.n, flags); |
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| 233 | popredir(); |
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| 234 | break; |
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| 235 | case NSUBSHELL: |
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| 236 | evalsubshell(n, flags); |
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| 237 | break; |
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| 238 | case NBACKGND: |
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| 239 | evalsubshell(n, flags); |
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| 240 | break; |
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| 241 | case NIF: { |
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| 242 | evaltree(n->nif.test, EV_TESTED); |
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| 243 | if (evalskip) |
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| 244 | goto out; |
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| 245 | if (exitstatus == 0) |
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| 246 | evaltree(n->nif.ifpart, flags); |
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| 247 | else if (n->nif.elsepart) |
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| 248 | evaltree(n->nif.elsepart, flags); |
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| 249 | else |
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| 250 | exitstatus = 0; |
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| 251 | break; |
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| 252 | } |
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| 253 | case NWHILE: |
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| 254 | case NUNTIL: |
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| 255 | evalloop(n, flags); |
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| 256 | break; |
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| 257 | case NFOR: |
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| 258 | evalfor(n, flags); |
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| 259 | break; |
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| 260 | case NCASE: |
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| 261 | evalcase(n, flags); |
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| 262 | break; |
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| 263 | case NDEFUN: |
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| 264 | if (is_special_builtin(n->narg.text)) { |
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| 265 | outfmt(out2, "%s is a special built-in\n", n->narg.text); |
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| 266 | exitstatus = 1; |
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| 267 | break; |
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| 268 | } |
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| 269 | defun(n->narg.text, n->narg.next); |
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| 270 | exitstatus = 0; |
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| 271 | break; |
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| 272 | case NNOT: |
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| 273 | evaltree(n->nnot.com, EV_TESTED); |
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| 274 | exitstatus = !exitstatus; |
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| 275 | break; |
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| 276 | |||
| 277 | case NPIPE: |
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| 278 | evalpipe(n); |
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| 279 | break; |
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| 280 | case NCMD: |
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| 281 | evalcommand(n, flags, (struct backcmd *)NULL); |
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| 282 | break; |
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| 283 | default: |
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| 284 | out1fmt("Node type = %d\n", n->type); |
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| 285 | flushout(&output); |
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| 286 | break; |
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| 287 | } |
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| 288 | out: |
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| 289 | if (pendingsigs) |
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| 290 | dotrap(); |
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| 291 | if ((flags & EV_EXIT) || (eflag && exitstatus && !(flags & EV_TESTED))) |
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| 292 | exitshell(exitstatus); |
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| 293 | } |
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| 294 | |||
| 295 | |||
| 296 | STATIC void |
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| 297 | evalloop(n, flags) |
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| 298 | union node *n; |
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| 299 | int flags; |
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| 300 | { |
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| 301 | int status; |
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| 302 | |||
| 303 | loopnest++; |
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| 304 | status = 0; |
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| 305 | for (;;) { |
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| 306 | evaltree(n->nbinary.ch1, EV_TESTED); |
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| 307 | if (evalskip) { |
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| 308 | skipping: if (evalskip == SKIPCONT && --skipcount <= 0) { |
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| 309 | evalskip = 0; |
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| 310 | continue; |
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| 311 | } |
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| 312 | if (evalskip == SKIPBREAK && --skipcount <= 0) |
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| 313 | evalskip = 0; |
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| 314 | break; |
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| 315 | } |
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| 316 | if (n->type == NWHILE) { |
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| 317 | if (exitstatus != 0) |
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| 318 | break; |
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| 319 | } else { |
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| 320 | if (exitstatus == 0) |
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| 321 | break; |
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| 322 | } |
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| 323 | evaltree(n->nbinary.ch2, flags & EV_TESTED); |
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| 324 | status = exitstatus; |
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| 325 | if (evalskip) |
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| 326 | goto skipping; |
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| 327 | } |
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| 328 | loopnest--; |
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| 329 | exitstatus = status; |
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| 330 | } |
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| 331 | |||
| 332 | |||
| 333 | |||
| 334 | STATIC void |
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| 335 | evalfor(n, flags) |
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| 336 | union node *n; |
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| 337 | int flags; |
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| 338 | { |
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| 339 | struct arglist arglist; |
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| 340 | union node *argp; |
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| 341 | struct strlist *sp; |
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| 342 | struct stackmark smark; |
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| 343 | |||
| 344 | setstackmark(&smark); |
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| 345 | arglist.lastp = &arglist.list; |
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| 346 | for (argp = n->nfor.args ; argp ; argp = argp->narg.next) { |
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| 347 | oexitstatus = exitstatus; |
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| 348 | expandarg(argp, &arglist, EXP_FULL | EXP_TILDE | EXP_RECORD); |
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| 349 | if (evalskip) |
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| 350 | goto out; |
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| 351 | } |
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| 352 | *arglist.lastp = NULL; |
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| 353 | |||
| 354 | exitstatus = 0; |
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| 355 | loopnest++; |
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| 356 | for (sp = arglist.list ; sp ; sp = sp->next) { |
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| 357 | setvar(n->nfor.var, sp->text, 0); |
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| 358 | evaltree(n->nfor.body, flags & EV_TESTED); |
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| 359 | if (evalskip) { |
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| 360 | if (evalskip == SKIPCONT && --skipcount <= 0) { |
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| 361 | evalskip = 0; |
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| 362 | continue; |
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| 363 | } |
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| 364 | if (evalskip == SKIPBREAK && --skipcount <= 0) |
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| 365 | evalskip = 0; |
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| 366 | break; |
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| 367 | } |
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| 368 | } |
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| 369 | loopnest--; |
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| 370 | out: |
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| 371 | popstackmark(&smark); |
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| 372 | } |
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| 373 | |||
| 374 | |||
| 375 | |||
| 376 | STATIC void |
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| 377 | evalcase(n, flags) |
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| 378 | union node *n; |
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| 379 | int flags; |
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| 380 | { |
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| 381 | union node *cp; |
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| 382 | union node *patp; |
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| 383 | struct arglist arglist; |
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| 384 | struct stackmark smark; |
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| 385 | |||
| 386 | setstackmark(&smark); |
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| 387 | arglist.lastp = &arglist.list; |
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| 388 | oexitstatus = exitstatus; |
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| 389 | expandarg(n->ncase.expr, &arglist, EXP_TILDE); |
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| 390 | for (cp = n->ncase.cases ; cp && evalskip == 0 ; cp = cp->nclist.next) { |
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| 391 | for (patp = cp->nclist.pattern ; patp ; patp = patp->narg.next) { |
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| 392 | if (casematch(patp, arglist.list->text)) { |
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| 393 | if (evalskip == 0) { |
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| 394 | evaltree(cp->nclist.body, flags); |
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| 395 | } |
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| 396 | goto out; |
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| 397 | } |
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| 398 | } |
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| 399 | } |
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| 400 | out: |
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| 401 | popstackmark(&smark); |
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| 402 | } |
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| 403 | |||
| 404 | |||
| 405 | |||
| 406 | /* |
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| 407 | * Kick off a subshell to evaluate a tree. |
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| 408 | */ |
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| 409 | |||
| 410 | STATIC void |
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| 411 | evalsubshell(n, flags) |
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| 412 | union node *n; |
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| 413 | int flags; |
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| 414 | { |
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| 415 | struct job *jp; |
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| 416 | int backgnd = (n->type == NBACKGND); |
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| 417 | |||
| 418 | expredir(n->nredir.redirect); |
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| 419 | jp = makejob(n, 1); |
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| 420 | if (forkshell(jp, n, backgnd) == 0) { |
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| 421 | if (backgnd) |
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| 422 | flags &=~ EV_TESTED; |
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| 423 | redirect(n->nredir.redirect, 0); |
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| 424 | evaltree(n->nredir.n, flags | EV_EXIT); /* never returns */ |
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| 425 | } |
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| 426 | if (! backgnd) { |
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| 427 | INTOFF; |
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| 428 | exitstatus = waitforjob(jp); |
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| 429 | INTON; |
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| 430 | } |
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| 431 | } |
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| 432 | |||
| 433 | |||
| 434 | |||
| 435 | /* |
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| 436 | * Compute the names of the files in a redirection list. |
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| 437 | */ |
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| 438 | |||
| 439 | STATIC void |
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| 440 | expredir(n) |
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| 441 | union node *n; |
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| 442 | { |
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| 443 | union node *redir; |
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| 444 | |||
| 445 | for (redir = n ; redir ; redir = redir->nfile.next) { |
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| 446 | struct arglist fn; |
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| 447 | fn.lastp = &fn.list; |
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| 448 | oexitstatus = exitstatus; |
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| 449 | switch (redir->type) { |
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| 450 | case NFROMTO: |
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| 451 | case NFROM: |
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| 452 | case NTO: |
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| 453 | case NAPPEND: |
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| 454 | case NTOOV: |
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| 455 | expandarg(redir->nfile.fname, &fn, EXP_TILDE | EXP_REDIR); |
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| 456 | redir->nfile.expfname = fn.list->text; |
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| 457 | break; |
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| 458 | case NFROMFD: |
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| 459 | case NTOFD: |
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| 460 | if (redir->ndup.vname) { |
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| 461 | expandarg(redir->ndup.vname, &fn, EXP_FULL | EXP_TILDE); |
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| 462 | fixredir(redir, fn.list->text, 1); |
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| 463 | } |
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| 464 | break; |
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| 465 | } |
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| 466 | } |
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| 467 | } |
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| 468 | |||
| 469 | |||
| 470 | |||
| 471 | /* |
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| 472 | * Evaluate a pipeline. All the processes in the pipeline are children |
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| 473 | * of the process creating the pipeline. (This differs from some versions |
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| 474 | * of the shell, which make the last process in a pipeline the parent |
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| 475 | * of all the rest.) |
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| 476 | */ |
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| 477 | |||
| 478 | STATIC void |
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| 479 | evalpipe(n) |
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| 480 | union node *n; |
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| 481 | { |
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| 482 | struct job *jp; |
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| 483 | struct nodelist *lp; |
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| 484 | int pipelen; |
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| 485 | int prevfd; |
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| 486 | int pip[2]; |
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| 487 | |||
| 488 | TRACE(("evalpipe(0x%lx) called\n", (long)n)); |
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| 489 | pipelen = 0; |
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| 490 | for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) |
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| 491 | pipelen++; |
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| 492 | INTOFF; |
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| 493 | jp = makejob(n, pipelen); |
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| 494 | prevfd = -1; |
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| 495 | for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { |
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| 496 | prehash(lp->n); |
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| 497 | pip[1] = -1; |
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| 498 | if (lp->next) { |
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| 499 | if (pipe(pip) < 0) { |
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| 500 | close(prevfd); |
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| 501 | error("Pipe call failed"); |
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| 502 | } |
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| 503 | } |
||
| 504 | if (forkshell(jp, lp->n, n->npipe.backgnd) == 0) { |
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| 505 | INTON; |
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| 506 | if (prevfd > 0) { |
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| 507 | close(0); |
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| 508 | copyfd(prevfd, 0); |
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| 509 | close(prevfd); |
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| 510 | if (pip[0] == 0) { |
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| 511 | pip[0] = -1; |
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| 512 | } |
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| 513 | } |
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| 514 | if (pip[1] >= 0) { |
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| 515 | if (pip[0] >= 0) { |
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| 516 | close(pip[0]); |
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| 517 | } |
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| 518 | if (pip[1] != 1) { |
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| 519 | close(1); |
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| 520 | copyfd(pip[1], 1); |
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| 521 | close(pip[1]); |
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| 522 | } |
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| 523 | } |
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| 524 | evaltree(lp->n, EV_EXIT); |
||
| 525 | } |
||
| 526 | if (prevfd >= 0) |
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| 527 | close(prevfd); |
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| 528 | prevfd = pip[0]; |
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| 529 | close(pip[1]); |
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| 530 | } |
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| 531 | INTON; |
||
| 532 | if (n->npipe.backgnd == 0) { |
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| 533 | INTOFF; |
||
| 534 | exitstatus = waitforjob(jp); |
||
| 535 | TRACE(("evalpipe: job done exit status %d\n", exitstatus)); |
||
| 536 | INTON; |
||
| 537 | } |
||
| 538 | } |
||
| 539 | |||
| 540 | |||
| 541 | |||
| 542 | /* |
||
| 543 | * Execute a command inside back quotes. If it's a builtin command, we |
||
| 544 | * want to save its output in a block obtained from malloc. Otherwise |
||
| 545 | * we fork off a subprocess and get the output of the command via a pipe. |
||
| 546 | * Should be called with interrupts off. |
||
| 547 | */ |
||
| 548 | |||
| 549 | void |
||
| 550 | evalbackcmd(n, result) |
||
| 551 | union node *n; |
||
| 552 | struct backcmd *result; |
||
| 553 | { |
||
| 554 | int pip[2]; |
||
| 555 | struct job *jp; |
||
| 556 | struct stackmark smark; /* unnecessary */ |
||
| 557 | |||
| 558 | setstackmark(&smark); |
||
| 559 | result->fd = -1; |
||
| 560 | result->buf = NULL; |
||
| 561 | result->nleft = 0; |
||
| 562 | result->jp = NULL; |
||
| 563 | if (n == NULL) { |
||
| 564 | exitstatus = 0; |
||
| 565 | goto out; |
||
| 566 | } |
||
| 567 | #ifdef notyet |
||
| 568 | /* |
||
| 569 | * For now we disable executing builtins in the same |
||
| 570 | * context as the shell, because we are not keeping |
||
| 571 | * enough state to recover from changes that are |
||
| 572 | * supposed only to affect subshells. eg. echo "`cd /`" |
||
| 573 | */ |
||
| 574 | if (n->type == NCMD) { |
||
| 575 | exitstatus = oexitstatus; |
||
| 576 | evalcommand(n, EV_BACKCMD, result); |
||
| 577 | } else |
||
| 578 | #endif |
||
| 579 | { |
||
| 580 | exitstatus = 0; |
||
| 581 | if (pipe(pip) < 0) |
||
| 582 | error("Pipe call failed"); |
||
| 583 | jp = makejob(n, 1); |
||
| 584 | if (forkshell(jp, n, FORK_NOJOB) == 0) { |
||
| 585 | FORCEINTON; |
||
| 586 | close(pip[0]); |
||
| 587 | if (pip[1] != 1) { |
||
| 588 | close(1); |
||
| 589 | copyfd(pip[1], 1); |
||
| 590 | close(pip[1]); |
||
| 591 | } |
||
| 592 | eflag = 0; |
||
| 593 | evaltree(n, EV_EXIT); |
||
| 594 | } |
||
| 595 | close(pip[1]); |
||
| 596 | result->fd = pip[0]; |
||
| 597 | result->jp = jp; |
||
| 598 | } |
||
| 599 | out: |
||
| 600 | popstackmark(&smark); |
||
| 601 | TRACE(("evalbackcmd done: fd=%d buf=0x%x nleft=%d jp=0x%x\n", |
||
| 602 | result->fd, result->buf, result->nleft, result->jp)); |
||
| 603 | } |
||
| 604 | |||
| 605 | |||
| 606 | |||
| 607 | /* |
||
| 608 | * Execute a simple command. |
||
| 609 | */ |
||
| 610 | |||
| 611 | STATIC void |
||
| 612 | evalcommand(cmd, flags, backcmd) |
||
| 613 | union node *cmd; |
||
| 614 | int flags; |
||
| 615 | struct backcmd *backcmd; |
||
| 616 | { |
||
| 617 | struct stackmark smark; |
||
| 618 | union node *argp; |
||
| 619 | struct arglist arglist; |
||
| 620 | struct arglist varlist; |
||
| 621 | char **argv; |
||
| 622 | int argc; |
||
| 623 | char **envp; |
||
| 624 | int varflag; |
||
| 625 | int pseudovarflag; |
||
| 626 | struct strlist *sp; |
||
| 627 | int mode; |
||
| 628 | int pip[2]; |
||
| 629 | struct cmdentry cmdentry; |
||
| 630 | struct job *jp; |
||
| 631 | struct jmploc jmploc; |
||
| 632 | struct jmploc *volatile savehandler; |
||
| 633 | char *volatile savecmdname; |
||
| 634 | volatile struct shparam saveparam; |
||
| 635 | struct localvar *volatile savelocalvars; |
||
| 636 | volatile int e; |
||
| 637 | char *lastarg; |
||
| 638 | int not_special; |
||
| 639 | const char *path; |
||
| 640 | const char *standard_path; |
||
| 641 | #if __GNUC__ |
||
| 642 | /* Avoid longjmp clobbering */ |
||
| 643 | (void) &argv; |
||
| 644 | (void) &argc; |
||
| 645 | (void) &lastarg; |
||
| 646 | (void) &flags; |
||
| 647 | (void) ¬_special; |
||
| 648 | (void) &standard_path; |
||
| 649 | #endif |
||
| 650 | |||
| 651 | /* First expand the arguments. */ |
||
| 652 | TRACE(("evalcommand(0x%lx, %d) called\n", (long)cmd, flags)); |
||
| 653 | setstackmark(&smark); |
||
| 654 | arglist.lastp = &arglist.list; |
||
| 655 | varlist.lastp = &varlist.list; |
||
| 656 | arglist.list = 0; |
||
| 657 | varflag = 1; |
||
| 658 | pseudovarflag = 0; |
||
| 659 | oexitstatus = exitstatus; |
||
| 660 | exitstatus = 0; |
||
| 661 | not_special = 0; |
||
| 662 | path = pathval(); |
||
| 663 | standard_path = NULL; |
||
| 664 | for (argp = cmd->ncmd.args ; argp ; argp = argp->narg.next) { |
||
| 665 | char *p = argp->narg.text; |
||
| 666 | if ((varflag || pseudovarflag) && is_name(*p)) { |
||
| 667 | do { |
||
| 668 | p++; |
||
| 669 | } while (is_in_name(*p)); |
||
| 670 | if (*p == '=') { |
||
| 671 | if (varflag) |
||
| 672 | expandarg(argp, &varlist, EXP_VARTILDE); |
||
| 673 | else |
||
| 674 | expandarg(argp, &arglist, EXP_VARTILDE); |
||
| 675 | continue; |
||
| 676 | } |
||
| 677 | } |
||
| 678 | expandarg(argp, &arglist, EXP_FULL | EXP_TILDE); |
||
| 679 | if (varflag && arglist.list && is_assignment_builtin(arglist.list->text)) |
||
| 680 | pseudovarflag = 1; |
||
| 681 | varflag = 0; |
||
| 682 | } |
||
| 683 | *arglist.lastp = NULL; |
||
| 684 | *varlist.lastp = NULL; |
||
| 685 | expredir(cmd->ncmd.redirect); |
||
| 686 | argc = 0; |
||
| 687 | for (sp = arglist.list ; sp ; sp = sp->next) |
||
| 688 | argc++; |
||
| 689 | argv = stalloc(sizeof (char *) * (argc + 1)); |
||
| 690 | |||
| 691 | for (sp = arglist.list ; sp ; sp = sp->next) { |
||
| 692 | TRACE(("evalcommand arg: %s\n", sp->text)); |
||
| 693 | *argv++ = sp->text; |
||
| 694 | } |
||
| 695 | *argv = NULL; |
||
| 696 | lastarg = NULL; |
||
| 697 | if (iflag && funcnest == 0 && argc > 0) |
||
| 698 | lastarg = argv[-1]; |
||
| 699 | argv -= argc; |
||
| 700 | |||
| 701 | /* Print the command if xflag is set. */ |
||
| 702 | if (xflag) { |
||
| 703 | outc('+', &errout); |
||
| 704 | for (sp = varlist.list ; sp ; sp = sp->next) { |
||
| 705 | outc(' ', &errout); |
||
| 706 | out2str(sp->text); |
||
| 707 | } |
||
| 708 | for (sp = arglist.list ; sp ; sp = sp->next) { |
||
| 709 | outc(' ', &errout); |
||
| 710 | out2str(sp->text); |
||
| 711 | } |
||
| 712 | outc('\n', &errout); |
||
| 713 | flushout(&errout); |
||
| 714 | } |
||
| 715 | |||
| 716 | /* Now locate the command. */ |
||
| 717 | if (argc == 0) { |
||
| 718 | cmdentry.cmdtype = CMDBUILTIN; |
||
| 719 | cmdentry.u.index = BLTINCMD; |
||
| 720 | } else { |
||
| 721 | static const char PATH[] = "PATH="; |
||
| 722 | const char *oldpath = NULL; |
||
| 723 | int findflag = DO_ERR; |
||
| 724 | |||
| 725 | /* |
||
| 726 | * Modify the command lookup path, if a PATH= assignment |
||
| 727 | * is present |
||
| 728 | */ |
||
| 729 | for (sp = varlist.list ; sp ; sp = sp->next) |
||
| 730 | if (strncmp(sp->text, PATH, sizeof(PATH) - 1) == 0) { |
||
| 731 | path = sp->text + sizeof(PATH) - 1; |
||
| 732 | findflag |= DO_BRUTE; |
||
| 733 | } |
||
| 734 | for(;;) { |
||
| 735 | find_command(argv[0], &cmdentry, findflag, path); |
||
| 736 | if (oldpath) { |
||
| 737 | path = oldpath; |
||
| 738 | oldpath = NULL; |
||
| 739 | } |
||
| 740 | if (cmdentry.cmdtype == CMDUNKNOWN) { /* command not found */ |
||
| 741 | exitstatus = 127; |
||
| 742 | flushout(&errout); |
||
| 743 | goto out; |
||
| 744 | } |
||
| 745 | /* implement the bltin builtin here */ |
||
| 746 | if (cmdentry.cmdtype == CMDBUILTIN && cmdentry.u.index == BLTINCMD) { |
||
| 747 | not_special = 1; |
||
| 748 | for(;;) { |
||
| 749 | argv++; |
||
| 750 | if (--argc == 0) |
||
| 751 | break; |
||
| 752 | if ((cmdentry.u.index = find_builtin(*argv)) < 0) { |
||
| 753 | outfmt(&errout, "%s: not found\n", *argv); |
||
| 754 | exitstatus = 127; |
||
| 755 | flushout(&errout); |
||
| 756 | goto out; |
||
| 757 | } |
||
| 758 | if (cmdentry.u.index != BLTINCMD) |
||
| 759 | break; |
||
| 760 | } |
||
| 761 | } |
||
| 762 | if (cmdentry.cmdtype == CMDBUILTIN && cmdentry.u.index == COMMANDCMD) { |
||
| 763 | not_special = 1; |
||
| 764 | argv++; |
||
| 765 | if (--argc == 0) { |
||
| 766 | exitstatus = 0; |
||
| 767 | goto out; |
||
| 768 | } |
||
| 769 | if (*argv[0] == '-') { |
||
| 770 | if (!equal(argv[0], "-p")) { |
||
| 771 | argv--; |
||
| 772 | argc++; |
||
| 773 | break; |
||
| 774 | } |
||
| 775 | argv++; |
||
| 776 | if (--argc == 0) { |
||
| 777 | exitstatus = 0; |
||
| 778 | goto out; |
||
| 779 | } |
||
| 780 | if (!standard_path) { |
||
| 781 | standard_path = get_standard_path(); |
||
| 782 | } |
||
| 783 | oldpath = path; |
||
| 784 | path = standard_path; |
||
| 785 | findflag |= DO_BRUTE; |
||
| 786 | } |
||
| 787 | findflag |= DO_NOFUN; |
||
| 788 | continue; |
||
| 789 | } |
||
| 790 | break; |
||
| 791 | } |
||
| 792 | } |
||
| 793 | |||
| 794 | /* Fork off a child process if necessary. */ |
||
| 795 | if (cmd->ncmd.backgnd |
||
| 796 | || (cmdentry.cmdtype == CMDNORMAL && (flags & EV_EXIT) == 0) |
||
| 797 | || ((flags & EV_BACKCMD) != 0 |
||
| 798 | && (cmdentry.cmdtype != CMDBUILTIN |
||
| 799 | || cmdentry.u.index == DOTCMD |
||
| 800 | || cmdentry.u.index == EVALCMD))) { |
||
| 801 | jp = makejob(cmd, 1); |
||
| 802 | mode = cmd->ncmd.backgnd; |
||
| 803 | if (flags & EV_BACKCMD) { |
||
| 804 | mode = FORK_NOJOB; |
||
| 805 | if (pipe(pip) < 0) |
||
| 806 | error("Pipe call failed"); |
||
| 807 | } |
||
| 808 | if (forkshell(jp, cmd, mode) != 0) |
||
| 809 | goto parent; /* at end of routine */ |
||
| 810 | if (flags & EV_BACKCMD) { |
||
| 811 | FORCEINTON; |
||
| 812 | close(pip[0]); |
||
| 813 | if (pip[1] != 1) { |
||
| 814 | close(1); |
||
| 815 | copyfd(pip[1], 1); |
||
| 816 | close(pip[1]); |
||
| 817 | } |
||
| 818 | } |
||
| 819 | flags |= EV_EXIT; |
||
| 820 | } |
||
| 821 | |||
| 822 | /* This is the child process if a fork occurred. */ |
||
| 823 | /* Execute the command. */ |
||
| 824 | if (cmdentry.cmdtype == CMDFUNCTION) { |
||
| 825 | #ifdef DEBUG |
||
| 826 | trputs("Shell function: "); trargs(argv); |
||
| 827 | #endif |
||
| 828 | exitstatus = oexitstatus; |
||
| 829 | redirect(cmd->ncmd.redirect, REDIR_PUSH); |
||
| 830 | saveparam = shellparam; |
||
| 831 | shellparam.malloc = 0; |
||
| 832 | shellparam.nparam = argc - 1; |
||
| 833 | shellparam.p = argv + 1; |
||
| 834 | INTOFF; |
||
| 835 | savelocalvars = localvars; |
||
| 836 | localvars = NULL; |
||
| 837 | INTON; |
||
| 838 | if (setjmp(jmploc.loc)) { |
||
| 839 | if (exception == EXSHELLPROC) { |
||
| 840 | freeparam((volatile struct shparam *) |
||
| 841 | &saveparam); |
||
| 842 | } else { |
||
| 843 | saveparam.optind = shellparam.optind; |
||
| 844 | saveparam.optoff = shellparam.optoff; |
||
| 845 | freeparam(&shellparam); |
||
| 846 | shellparam = saveparam; |
||
| 847 | } |
||
| 848 | poplocalvars(); |
||
| 849 | localvars = savelocalvars; |
||
| 850 | handler = savehandler; |
||
| 851 | longjmp(handler->loc, 1); |
||
| 852 | } |
||
| 853 | savehandler = handler; |
||
| 854 | handler = &jmploc; |
||
| 855 | for (sp = varlist.list ; sp ; sp = sp->next) |
||
| 856 | mklocal(sp->text); |
||
| 857 | funcnest++; |
||
| 858 | evaltree(cmdentry.u.func, flags & EV_TESTED); |
||
| 859 | funcnest--; |
||
| 860 | INTOFF; |
||
| 861 | poplocalvars(); |
||
| 862 | localvars = savelocalvars; |
||
| 863 | saveparam.optind = shellparam.optind; |
||
| 864 | saveparam.optoff = shellparam.optoff; |
||
| 865 | freeparam(&shellparam); |
||
| 866 | shellparam = saveparam; |
||
| 867 | handler = savehandler; |
||
| 868 | popredir(); |
||
| 869 | INTON; |
||
| 870 | if (evalskip == SKIPFUNC) { |
||
| 871 | evalskip = 0; |
||
| 872 | skipcount = 0; |
||
| 873 | } |
||
| 874 | if (flags & EV_EXIT) |
||
| 875 | exitshell(exitstatus); |
||
| 876 | } else if (cmdentry.cmdtype == CMDBUILTIN) { |
||
| 877 | #ifdef DEBUG |
||
| 878 | trputs("builtin command: "); trargs(argv); |
||
| 879 | #endif |
||
| 880 | mode = (cmdentry.u.index == EXECCMD)? 0 : REDIR_PUSH; |
||
| 881 | if (flags == EV_BACKCMD) { |
||
| 882 | #if defined(_GNU_SOURCE) && !defined(__UCLIBC__) |
||
| 883 | openmemout(); |
||
| 884 | #else |
||
| 885 | memout.nleft = 0; |
||
| 886 | memout.nextc = memout.buf; |
||
| 887 | memout.bufsize = 64; |
||
| 888 | #endif |
||
| 889 | mode |= REDIR_BACKQ; |
||
| 890 | } |
||
| 891 | redirect(cmd->ncmd.redirect, mode); |
||
| 892 | savecmdname = commandname; |
||
| 893 | cmdenviron = varlist.list; |
||
| 894 | e = -1; |
||
| 895 | if (setjmp(jmploc.loc)) { |
||
| 896 | e = exception; |
||
| 897 | exitstatus = (e == EXINT)? SIGINT+128 : 2; |
||
| 898 | goto cmddone; |
||
| 899 | } |
||
| 900 | savehandler = handler; |
||
| 901 | handler = &jmploc; |
||
| 902 | commandname = argv[0]; |
||
| 903 | argptr = argv + 1; |
||
| 904 | optptr = NULL; /* initialize nextopt */ |
||
| 905 | exitstatus = (*builtinfunc[cmdentry.u.index])(argc, argv); |
||
| 906 | flushall(); |
||
| 907 | cmddone: |
||
| 908 | out1 = &output; |
||
| 909 | out2 = &errout; |
||
| 910 | freestdout(); |
||
| 911 | if (!not_special && is_special_builtin(commandname)) |
||
| 912 | listsetvar(cmdenviron); |
||
| 913 | cmdenviron = NULL; |
||
| 914 | if (e != EXSHELLPROC) { |
||
| 915 | commandname = savecmdname; |
||
| 916 | if (flags & EV_EXIT) |
||
| 917 | exitshell(exitstatus); |
||
| 918 | } |
||
| 919 | handler = savehandler; |
||
| 920 | if (e != -1) { |
||
| 921 | if ((e != EXERROR && e != EXEXEC) |
||
| 922 | || cmdentry.u.index == BLTINCMD |
||
| 923 | || cmdentry.u.index == DOTCMD |
||
| 924 | || cmdentry.u.index == EVALCMD |
||
| 925 | #ifndef SMALL |
||
| 926 | || cmdentry.u.index == HISTCMD |
||
| 927 | #endif |
||
| 928 | || cmdentry.u.index == EXECCMD) |
||
| 929 | exraise(e); |
||
| 930 | FORCEINTON; |
||
| 931 | } |
||
| 932 | if (cmdentry.u.index != EXECCMD) |
||
| 933 | popredir(); |
||
| 934 | if (flags == EV_BACKCMD) { |
||
| 935 | #if defined(_GNU_SOURCE) && !defined(__UCLIBC__) |
||
| 936 | closememout(); |
||
| 937 | #endif |
||
| 938 | backcmd->buf = memout.buf; |
||
| 939 | #if defined(_GNU_SOURCE) && !defined(__UCLIBC__) |
||
| 940 | backcmd->nleft = memout.bufsize; |
||
| 941 | #else |
||
| 942 | backcmd->nleft = memout.nextc - memout.buf; |
||
| 943 | #endif |
||
| 944 | memout.buf = NULL; |
||
| 945 | } |
||
| 946 | cmdenviron = NULL; |
||
| 947 | } else { |
||
| 948 | #ifdef DEBUG |
||
| 949 | trputs("normal command: "); trargs(argv); |
||
| 950 | #endif |
||
| 951 | clearredir(); |
||
| 952 | redirect(cmd->ncmd.redirect, 0); |
||
| 953 | for (sp = varlist.list ; sp ; sp = sp->next) |
||
| 954 | setvareq(sp->text, VEXPORT|VSTACK); |
||
| 955 | envp = environment(); |
||
| 956 | shellexec(argv, envp, path, cmdentry.u.index); |
||
| 957 | } |
||
| 958 | goto out; |
||
| 959 | |||
| 960 | parent: /* parent process gets here (if we forked) */ |
||
| 961 | if (mode == 0) { /* argument to fork */ |
||
| 962 | INTOFF; |
||
| 963 | exitstatus = waitforjob(jp); |
||
| 964 | INTON; |
||
| 965 | } else if (mode == 2) { |
||
| 966 | backcmd->fd = pip[0]; |
||
| 967 | close(pip[1]); |
||
| 968 | backcmd->jp = jp; |
||
| 969 | } |
||
| 970 | |||
| 971 | out: |
||
| 972 | if (lastarg) |
||
| 973 | setvar("_", lastarg, 0); |
||
| 974 | popstackmark(&smark); |
||
| 975 | |||
| 976 | if (eflag && exitstatus && !(flags & EV_TESTED)) |
||
| 977 | exitshell(exitstatus); |
||
| 978 | } |
||
| 979 | |||
| 980 | |||
| 981 | |||
| 982 | /* |
||
| 983 | * Search for a command. This is called before we fork so that the |
||
| 984 | * location of the command will be available in the parent as well as |
||
| 985 | * the child. The check for "goodname" is an overly conservative |
||
| 986 | * check that the name will not be subject to expansion. |
||
| 987 | */ |
||
| 988 | |||
| 989 | STATIC void |
||
| 990 | prehash(n) |
||
| 991 | union node *n; |
||
| 992 | { |
||
| 993 | struct cmdentry entry; |
||
| 994 | |||
| 995 | if (n->type == NCMD && n->ncmd.args) |
||
| 996 | if (goodname(n->ncmd.args->narg.text)) |
||
| 997 | find_command(n->ncmd.args->narg.text, &entry, 0, |
||
| 998 | pathval()); |
||
| 999 | } |
||
| 1000 | |||
| 1001 | |||
| 1002 | |||
| 1003 | /* |
||
| 1004 | * Builtin commands. Builtin commands whose functions are closely |
||
| 1005 | * tied to evaluation are implemented here. |
||
| 1006 | */ |
||
| 1007 | |||
| 1008 | /* |
||
| 1009 | * No command given, or a bltin command with no arguments. Set the |
||
| 1010 | * specified variables. |
||
| 1011 | */ |
||
| 1012 | |||
| 1013 | int |
||
| 1014 | bltincmd(argc, argv) |
||
| 1015 | int argc; |
||
| 1016 | char **argv; |
||
| 1017 | { |
||
| 1018 | listsetvar(cmdenviron); |
||
| 1019 | /* |
||
| 1020 | * Preserve exitstatus of a previous possible redirection |
||
| 1021 | * as POSIX mandates |
||
| 1022 | */ |
||
| 1023 | return exitstatus; |
||
| 1024 | } |
||
| 1025 | |||
| 1026 | |||
| 1027 | /* |
||
| 1028 | * Handle break and continue commands. Break, continue, and return are |
||
| 1029 | * all handled by setting the evalskip flag. The evaluation routines |
||
| 1030 | * above all check this flag, and if it is set they start skipping |
||
| 1031 | * commands rather than executing them. The variable skipcount is |
||
| 1032 | * the number of loops to break/continue, or the number of function |
||
| 1033 | * levels to return. (The latter is always 1.) It should probably |
||
| 1034 | * be an error to break out of more loops than exist, but it isn't |
||
| 1035 | * in the standard shell so we don't make it one here. |
||
| 1036 | */ |
||
| 1037 | |||
| 1038 | int |
||
| 1039 | breakcmd(argc, argv) |
||
| 1040 | int argc; |
||
| 1041 | char **argv; |
||
| 1042 | { |
||
| 1043 | int n = argc > 1 ? number(argv[1]) : 1; |
||
| 1044 | |||
| 1045 | if (n > loopnest) |
||
| 1046 | n = loopnest; |
||
| 1047 | if (n > 0) { |
||
| 1048 | evalskip = (**argv == 'c')? SKIPCONT : SKIPBREAK; |
||
| 1049 | skipcount = n; |
||
| 1050 | } |
||
| 1051 | return 0; |
||
| 1052 | } |
||
| 1053 | |||
| 1054 | |||
| 1055 | /* |
||
| 1056 | * The return command. |
||
| 1057 | */ |
||
| 1058 | |||
| 1059 | int |
||
| 1060 | returncmd(argc, argv) |
||
| 1061 | int argc; |
||
| 1062 | char **argv; |
||
| 1063 | { |
||
| 1064 | int ret = argc > 1 ? number(argv[1]) : oexitstatus; |
||
| 1065 | |||
| 1066 | if (funcnest) { |
||
| 1067 | evalskip = SKIPFUNC; |
||
| 1068 | skipcount = 1; |
||
| 1069 | return ret; |
||
| 1070 | } |
||
| 1071 | else { |
||
| 1072 | /* Do what ksh does; skip the rest of the file */ |
||
| 1073 | evalskip = SKIPFILE; |
||
| 1074 | skipcount = 1; |
||
| 1075 | return ret; |
||
| 1076 | } |
||
| 1077 | } |
||
| 1078 | |||
| 1079 | |||
| 1080 | int |
||
| 1081 | falsecmd(argc, argv) |
||
| 1082 | int argc; |
||
| 1083 | char **argv; |
||
| 1084 | { |
||
| 1085 | return 1; |
||
| 1086 | } |
||
| 1087 | |||
| 1088 | |||
| 1089 | int |
||
| 1090 | truecmd(argc, argv) |
||
| 1091 | int argc; |
||
| 1092 | char **argv; |
||
| 1093 | { |
||
| 1094 | return 0; |
||
| 1095 | } |
||
| 1096 | |||
| 1097 | |||
| 1098 | int |
||
| 1099 | execcmd(argc, argv) |
||
| 1100 | int argc; |
||
| 1101 | char **argv; |
||
| 1102 | { |
||
| 1103 | if (argc > 1) { |
||
| 1104 | struct strlist *sp; |
||
| 1105 | |||
| 1106 | iflag = 0; /* exit on error */ |
||
| 1107 | mflag = 0; |
||
| 1108 | optschanged(); |
||
| 1109 | for (sp = cmdenviron; sp ; sp = sp->next) |
||
| 1110 | setvareq(sp->text, VEXPORT|VSTACK); |
||
| 1111 | shellexec(argv + 1, environment(), pathval(), 0); |
||
| 1112 | } |
||
| 1113 | return 0; |
||
| 1114 | } |
||
| 1115 | |||
| 1116 | STATIC int |
||
| 1117 | is_assignment_builtin (command) |
||
| 1118 | const char *command; |
||
| 1119 | { |
||
| 1120 | static const char *assignment_builtins[] = { |
||
| 1121 | "alias", "declare", "export", "local", "readonly", "typeset", |
||
| 1122 | (char *)NULL |
||
| 1123 | }; |
||
| 1124 | int i; |
||
| 1125 | |||
| 1126 | for (i = 0; assignment_builtins[i]; i++) |
||
| 1127 | if (strcmp(command, assignment_builtins[i]) == 0) return 1; |
||
| 1128 | return 0; |
||
| 1129 | } |
||
| 1130 | |||
| 1131 | int |
||
| 1132 | is_special_builtin(name) |
||
| 1133 | const char *name; |
||
| 1134 | { |
||
| 1135 | static const char *special_builtins[] = { |
||
| 1136 | "break", ":", ".", "continue", "eval", "exec", "exit", |
||
| 1137 | "export", "readonly", "return", "set", "shift", "times", |
||
| 1138 | "trap", "unset", (char *)NULL |
||
| 1139 | }; |
||
| 1140 | int i; |
||
| 1141 | |||
| 1142 | if (!name) return 0; |
||
| 1143 | for (i = 0; special_builtins[i]; i++) |
||
| 1144 | if (equal(name, special_builtins[i])) return 1; |
||
| 1145 | return 0; |
||
| 1146 | } |
||
| 1147 | |||
| 1148 | STATIC const char * |
||
| 1149 | get_standard_path() |
||
| 1150 | { |
||
| 1151 | char *p; |
||
| 1152 | size_t len; |
||
| 1153 | |||
| 1154 | len = confstr(_CS_PATH, NULL, 0); |
||
| 1155 | p = stalloc(len + 2); |
||
| 1156 | *p = '\0'; |
||
| 1157 | confstr(_CS_PATH, p, len); |
||
| 1158 | return p; |
||
| 1159 | } |