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| Rev | Author | Line No. | Line |
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| 3265 | post | 1 | /* Copyright (c) 2008, Tim Post <tinkertim@gmail.com> |
| 2 | * Copyright (C) 1998 by Wes Peters <wes@softweyr.com> |
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| 3 | * Copyright (c) 1988, 1993 The Regents of the University of California. |
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| 4 | * All rights reserved by all copyright holders. |
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| 5 | * |
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| 6 | * Redistribution and use in source and binary forms, with or without |
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| 7 | * modification, are permitted provided that the following conditions are met: |
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| 8 | * |
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| 9 | * Redistributions of source code must retain the above copyright notice, this |
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| 10 | * list of conditions and the following disclaimer. |
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| 11 | * |
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| 12 | * Redistributions in binary form must reproduce the above copyright notice, |
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| 13 | * this list of conditions and the following disclaimer in the documentation |
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| 14 | * and/or other materials provided with the distribution. |
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| 15 | * |
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| 16 | * Neither the name of the original program's authors nor the names of its |
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| 17 | * contributors may be used to endorse or promote products derived from this |
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| 18 | * software without specific prior written permission. |
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| 19 | * |
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| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 21 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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| 24 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 30 | * POSSIBILITY OF SUCH DAMAGE. |
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| 31 | */ |
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| 32 | |||
| 33 | /* NOTES: |
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| 34 | * 1 - Various functions were adapted from FreeBSD (copyright holders noted above) |
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| 35 | * these functions are identified with comments. |
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| 36 | * |
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| 37 | * 2 - Some of these have since appeared in libc. They remain here for various |
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| 38 | * reasons, such as the eventual integration of garbage collection for things |
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| 39 | * that allocate memory and don't automatically free it. |
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| 40 | * |
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| 41 | * 3 - Things that expect a pointer to an allocated string do _no_ sanity checking |
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| 42 | * if developing on a simulator with no debugger, take care :) |
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| 43 | */ |
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| 44 | |||
| 45 | #include <stdio.h> |
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| 46 | #include <string.h> |
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| 47 | #include <stdarg.h> |
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| 48 | #include <stdlib.h> |
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| 3345 | post | 49 | #include <stdarg.h> |
| 3265 | post | 50 | |
| 51 | #include "config.h" |
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| 52 | #include "errors.h" |
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| 53 | #include "util.h" |
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| 54 | |||
| 3345 | post | 55 | /* some platforms do not have strdup, implement it here. |
| 56 | * Returns a pointer to an allocated string or NULL on failure */ |
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| 3265 | post | 57 | char * cli_strdup(const char *s1) |
| 58 | { |
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| 59 | size_t len = strlen(s1) + 1; |
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| 60 | void *ret = malloc(len); |
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| 61 | |||
| 62 | if (ret == NULL) |
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| 63 | return (char *) NULL; |
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| 64 | |||
| 65 | return (char *) memcpy(ret, s1, len); |
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| 66 | } |
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| 67 | |||
| 3345 | post | 68 | /* |
| 69 | * Take a previously allocated string (s1), re-size it to accept s2 and copy |
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| 70 | * the contents of s2 into s1. |
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| 71 | * Return -1 on failure, or the length of the copied string on success. |
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| 72 | */ |
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| 73 | int cli_redup(char **s1, const char *s2) |
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| 74 | { |
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| 75 | size_t len = strlen(s2) + 1; |
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| 76 | |||
| 77 | if (! len) |
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| 78 | return -1; |
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| 79 | |||
| 80 | *s1 = realloc(*s1, len); |
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| 81 | |||
| 82 | if (*s1 == NULL) |
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| 83 | return -1; |
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| 84 | |||
| 85 | memset(*s1, 0, sizeof(*s1)); |
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| 86 | memcpy(*s1, s2, len); |
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| 87 | return (int) len; |
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| 88 | } |
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| 89 | |||
| 90 | /* An asprintf() for concantenating paths. Allocates the system PATH_MAX value, |
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| 91 | * expands the formatted string and re-sizes the block s1 points to accordingly. |
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| 92 | * |
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| 93 | * Returns the length of the new s1 on success, -1 on failure. On failure, an |
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| 94 | * attempt is made to return s1 unmodified for sanity, in this case 0 is returned. |
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| 95 | * to indicate that s1 was not modified. |
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| 96 | * |
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| 97 | * FIXME: ugly hack to get around asprintf(), if you use this, CHECK ITS VALUE! */ |
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| 98 | int cli_psprintf(char **s1, const char *fmt, ...) |
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| 99 | { |
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| 100 | va_list ap; |
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| 101 | size_t needed, base = PATH_MAX + 1; |
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| 102 | char *tmp = (char *) malloc(base); |
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| 103 | |||
| 104 | if (NULL == tmp) |
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| 105 | return -1; |
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| 106 | |||
| 107 | char *orig = *s1; |
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| 108 | |||
| 109 | memset(tmp, 0, sizeof(tmp)); |
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| 110 | va_start(ap, fmt); |
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| 111 | vsnprintf(tmp, base, fmt, ap); |
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| 112 | va_end(ap); |
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| 113 | needed = strlen(tmp) + 1; |
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| 114 | *s1 = realloc(*s1, needed); |
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| 115 | if (NULL == *s1) { |
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| 116 | *s1 = realloc(*s1, strlen(orig) + 1); |
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| 117 | if (NULL == *s1) { |
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| 118 | free(tmp); |
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| 119 | return -1; |
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| 120 | } |
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| 121 | memset(*s1, 0, sizeof(*s1)); |
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| 122 | memcpy(*s1, orig, strlen(orig) + 1); |
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| 123 | free(tmp); |
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| 124 | return 0; |
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| 125 | } |
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| 126 | memset(*s1, 0, sizeof(*s1)); |
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| 127 | memcpy(*s1, tmp, needed); |
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| 128 | free(tmp); |
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| 129 | |||
| 130 | return (int) needed; |
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| 131 | } |
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| 132 | |||
| 3265 | post | 133 | /* Ported from FBSD strtok.c 8.1 (Berkeley) 6/4/93 */ |
| 134 | char * cli_strtok_r(char *s, const char *delim, char **last) |
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| 135 | { |
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| 136 | char *spanp, *tok; |
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| 137 | int c, sc; |
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| 138 | |||
| 139 | if (s == NULL && (s = *last) == NULL) |
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| 140 | return (NULL); |
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| 141 | |||
| 142 | cont: |
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| 143 | c = *s++; |
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| 144 | for (spanp = (char *)delim; (sc = *spanp++) != 0;) { |
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| 145 | if (c == sc) |
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| 146 | goto cont; |
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| 147 | } |
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| 148 | |||
| 149 | if (c == 0) { /* no non-delimiter characters */ |
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| 150 | *last = NULL; |
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| 151 | return (NULL); |
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| 152 | } |
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| 3269 | post | 153 | |
| 3265 | post | 154 | tok = s - 1; |
| 155 | |||
| 156 | for (;;) { |
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| 157 | c = *s++; |
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| 158 | spanp = (char *)delim; |
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| 159 | do { |
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| 160 | if ((sc = *spanp++) == c) { |
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| 161 | if (c == 0) |
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| 162 | s = NULL; |
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| 163 | else |
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| 164 | s[-1] = '\0'; |
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| 165 | *last = s; |
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| 166 | return (tok); |
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| 167 | } |
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| 168 | } while (sc != 0); |
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| 169 | } |
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| 170 | } |
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| 171 | |||
| 172 | /* Ported from FBSD strtok.c 8.1 (Berkeley) 6/4/93 */ |
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| 173 | char * cli_strtok(char *s, const char *delim) |
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| 174 | { |
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| 175 | static char *last; |
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| 176 | |||
| 177 | return (cli_strtok_r(s, delim, &last)); |
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| 178 | } |