WebSVN – HelenOS – Diff – /branches/network/uspace/app/bdsh/cmds/modules/rm/rm.c

 /* Copyright (c) 2008, Tim Post <tinkertim@gmail.com>
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
+ *
  * Redistributions of source code must retain the above copyright notice, this
  * list of conditions and the following disclaimer.
+ *
  * Redistributions in binary form must reproduce the above copyright notice,
  * this list of conditions and the following disclaimer in the documentation
  * and/or other materials provided with the distribution.
+ *
  * Neither the name of the original program's authors nor the names of its
  * contributors may be used to endorse or promote products derived from this
  * software without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <dirent.h>
+#include <assert.h>
+#include <getopt.h>
 #include "config.h"
 #include "errors.h"
 #include "util.h"
 #include "entry.h"
 #include "rm.h"
 #include "cmds.h"
 static char *cmdname = "rm";
+#define RM_VERSION "0.0.1"
+static rm_job_t rm;
+static struct option long_options[] = {
+    { "help",       no_argument,    0,  'h' },
+    { "version",    no_argument,    0,  'v' },
+    { "recursive",  no_argument,    0,  'r' },
+    { "force",      no_argument,    0,  'f' },
+    { "safe",       no_argument,    0,  's' },
+    { 0, 0, 0, 0 }
+};
+unsigned int rm_start(rm_job_t *rm)
+{
+    rm->recursive = 0;
+    rm->force = 0;
+    rm->safe = 0;
+    /* Make sure we can allocate enough memory to store
+     * what is needed in the job structure */
+    if (NULL == (rm->nwd = (char *) malloc(PATH_MAX)))
+        return 0;
+    memset(rm->nwd, 0, sizeof(rm->nwd));
+    if (NULL == (rm->owd = (char *) malloc(PATH_MAX)))
+        return 0;
+    memset(rm->owd, 0, sizeof(rm->owd));
+    if (NULL == (rm->cwd = (char *) malloc(PATH_MAX)))
+        return 0;
+    memset(rm->cwd, 0, sizeof(rm->cwd));
+    chdir(".");
+    if (NULL == (getcwd(rm->owd, PATH_MAX)))
+        return 0;
+    return 1;
+}
+void rm_end(rm_job_t *rm)
+{
+    if (NULL != rm->nwd)
+        free(rm->nwd);
+    if (NULL != rm->owd)
+        free(rm->owd);
+    if (NULL != rm->cwd)
+        free(rm->cwd);
+    return;
+}
 unsigned int rm_recursive(const char *path)
+{
+    int rc;
+    /* First see if it will just go away */
+    rc = rmdir(path);
+    if (rc == 0)
+        return 0;
+    /* Its not empty, recursively scan it */
+    cli_error(CL_ENOTSUP,
-    cli_error(CL_ENOTSUP, "I do not yet remove directories");
+        "Can not remove %s, directory not empty", path);
     return 1;
+}
 unsigned int rm_single(const char *path)
+{
     if (unlink(path)) {
         cli_error(CL_EFAIL, "rm: could not remove file %s", path);
         return 1;
+    }
     return 0;
+}
 unsigned int rm_scope(const char *path)
+{
     int fd;
     DIR *dirp;
     dirp = opendir(path);
     if (dirp) {
         closedir(dirp);
         return RM_DIR;
+    }
     fd = open(path, O_RDONLY);
     if (fd > 0) {
         close(fd);
         return RM_FILE;
+    }
     return RM_BOGUS;
+}
 /* Dispays help for rm in various levels */
 void * help_cmd_rm(unsigned int level)
+{
     if (level == HELP_SHORT) {
         printf("`%s' removes files and directories.\n", cmdname);
     } else {
         help_cmd_rm(HELP_SHORT);
+        printf(
+        "Usage:  %s [options] <path>\n"
+        "Options:\n"
+        "  -h, --help       A short option summary\n"
+        "  -v, --version    Print version information and exit\n"
+        "  -r, --recursive  Recursively remove sub directories\n"
+        "  -f, --force      Do not prompt prior to removing files\n"
-        printf("  %s <path> If <path> is a directory, all files and "
+        "  -s, --safe       Stop if directories change during removal\n\n"
-            "directories\n  within will be unconditionally removed.\n",
+        "Currently, %s is under development, some options don't work.\n",
-                cmdname);
+        cmdname, cmdname);
+    }
     return CMD_VOID;
+}
 /* Main entry point for rm, accepts an array of arguments */
 int * cmd_rm(char **argv)
+{
     unsigned int argc;
     unsigned int i, scope, ret = 0;
+    int c, opt_ind;
+    size_t len;
-    char *buff;
+    char *buff = NULL;
-    /* Count the arguments */
     for (argc = 0; argv[argc] != NULL; argc ++);
     if (argc < 2) {
         cli_error(CL_EFAIL,
-            "%s - insufficient arguments. Try `help %s extended'",
+            "%s: insufficient arguments. Try %s --help", cmdname, cmdname);
-                cmdname, cmdname);
         return CMD_FAILURE;
+    }
+    if (!rm_start(&rm)) {
+        cli_error(CL_ENOMEM, "%s: could not initialize", cmdname);
+        rm_end(&rm);
+        return CMD_FAILURE;
+    }
+    for (c = 0, optind = 0, opt_ind = 0; c != -1;) {
+        c = getopt_long(argc, argv, "hvrfs", long_options, &opt_ind);
+        switch (c) {
+        case 'h':
+            help_cmd_rm(HELP_LONG);
+            return CMD_SUCCESS;
+        case 'v':
+            printf("%s\n", RM_VERSION);
+            return CMD_SUCCESS;
+        case 'r':
+            rm.recursive = 1;
+            break;
+        case 'f':
+            rm.force = 1;
+            break;
+        case 's':
+            rm.safe = 1;
+            break;
+        }
+    }
-    for (i = 1; i < argc; i++) {
+    if (optind == argc) {
+        cli_error(CL_EFAIL,
+            "%s: insufficient arguments. Try %s --help", cmdname, cmdname);
+        rm_end(&rm);
+        return CMD_FAILURE;
+    }
+    i = optind;
+    while (NULL != argv[i]) {
-        buff = cli_strdup(argv[i]);
+        len = strlen(argv[i]) + 2;
+        buff = (char *) realloc(buff, len);
+        assert(buff != NULL);
+        memset(buff, 0, sizeof(buff));
+        snprintf(buff, len, argv[i]);
         scope = rm_scope(buff);
         switch (scope) {
-        case RM_BOGUS:
+        case RM_BOGUS: /* FIXME */
-            cli_error(CL_ENOENT, "Can not unlink %s", buff);
-            break;
         case RM_FILE:
             ret += rm_single(buff);
             break;
         case RM_DIR:
+            if (! rm.recursive) {
+                printf("%s is a directory, use -r to remove it.\n", buff);
+                ret ++;
+            } else {
-            ret += rm_recursive(buff);
+                ret += rm_recursive(buff);
+            }
             break;
+        }
-        free(buff);
+        i++;
+    }
+    if (NULL != buff)
+        free(buff);
+    rm_end(&rm);
     if (ret)
         return CMD_FAILURE;
     else
         return CMD_SUCCESS;
+}

Subversion Repositories HelenOS

(root)/branches/network/uspace/app/bdsh/cmds/modules/rm/rm.c @ 4718 – Rev 3296 → 3337