libmisc/shell/main_cmdchmod.c

0001 /*
0002  * Copyright (c) 2014 embedded brains GmbH & Co. KG
0003  *
0004  * The license and distribution terms for this file may be
0005  * found in the file LICENSE in this distribution or at
0006  * http://www.rtems.org/license/LICENSE.
0007  */
0008
0009 #ifdef HAVE_CONFIG_H
0010 #include "config.h"
0011 #endif
0012
0013 #include <errno.h>
0014 #include <stdio.h>
0015 #include <string.h>
0016 #include <unistd.h>
0017
0018 #include <rtems/shellconfig.h>
0019 #include <rtems/stringto.h>
0020
0021 #include "internal.h"
0022
0023 static int usage(void)
0024 {
0025   puts(rtems_shell_CMDCHMOD_Command.usage);
0026
0027   return -1;
0028 }
0029
0030 static void error(const char *s, int eno)
0031 {
0032   printf("%s: %s\n", s, strerror(eno));
0033 }
0034
0035 static int rtems_shell_main_cmdchmod(int argc, char **argv)
0036 {
0037   if (argc >= 2) {
0038     unsigned long mode;
0039     rtems_status_code sc;
0040     uid_t task_uid;
0041     int i;
0042
0043     sc = rtems_string_to_unsigned_long(argv[1], &mode, NULL, 8);
0044     if (sc != RTEMS_SUCCESSFUL) {
0045       return usage();
0046     }
0047
0048     task_uid = getuid();
0049
0050     for (i = 2; i < argc; ++i) {
0051       const char *cmd = argv[i];
0052       rtems_shell_cmd_t *shell_cmd = rtems_shell_lookup_cmd(cmd);
0053
0054       if (shell_cmd != NULL) {
0055         if (task_uid == 0 || task_uid == shell_cmd->uid) {
0056           shell_cmd->mode = mode
0057             & (S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);
0058         } else if (rtems_shell_can_see_cmd(shell_cmd)) {
0059           error(cmd, EACCES);
0060         } else {
0061           error(cmd, ENOENT);
0062         }
0063       } else {
0064         error(cmd, ENOENT);
0065       }
0066     }
0067   } else {
0068     return usage();
0069   }
0070
0071   return 0;
0072 }
0073
0074 rtems_shell_cmd_t rtems_shell_CMDCHMOD_Command = {
0075   .name = "cmdchmod",
0076   .usage = "cmdchmod OCTAL-MODE COMMAND...",
0077   .topic = "misc",
0078   .command = rtems_shell_main_cmdchmod
0079 };