forked from Imagelibrary/rtems
107 lines
2.2 KiB
C
107 lines
2.2 KiB
C
/*
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* Copyright (c) 2014 embedded brains GmbH. All rights reserved.
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*
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* embedded brains GmbH
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* Dornierstr. 4
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* 82178 Puchheim
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* Germany
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* <rtems@embedded-brains.de>
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <rtems/shellconfig.h>
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#include "internal.h"
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static int usage(void)
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{
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puts(rtems_shell_CMDCHOWN_Command.usage);
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return -1;
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}
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static void error(const char *s, int eno)
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{
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printf("%s: %s\n", s, strerror(eno));
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}
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static int rtems_shell_main_cmdchown(int argc, char **argv)
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{
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if (argc >= 2) {
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const char *s = argv[1];
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unsigned new_uid = UINT_MAX;
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unsigned new_gid = UINT_MAX;
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bool change_uid = false;
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bool change_gid = false;
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uid_t task_uid;
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int i;
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if (strcmp(s, ":") != 0) {
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int n = sscanf(argv[1], "%u:%u", &new_uid, &new_gid);
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if (n == 2) {
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change_uid = true;
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change_gid = true;
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} else if (n == 1) {
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change_uid = true;
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} else {
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n = sscanf(argv[1], ":%u", &new_gid);
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if (n == 1) {
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change_gid = true;
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} else {
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return usage();
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}
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}
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}
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task_uid = getuid();
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for (i = 2; i < argc; ++i) {
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const char *cmd = argv[i];
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rtems_shell_cmd_t *shell_cmd = rtems_shell_lookup_cmd(cmd);
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if (shell_cmd != NULL) {
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if (task_uid == 0 || task_uid == shell_cmd->uid) {
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if (change_uid) {
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shell_cmd->uid = new_uid;
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}
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if (change_gid) {
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shell_cmd->gid = new_gid;
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}
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} else if (rtems_shell_can_see_cmd(shell_cmd)) {
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error(cmd, EACCES);
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} else {
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error(cmd, ENOENT);
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}
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} else {
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error(cmd, ENOENT);
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}
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}
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} else {
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return usage();
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}
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return 0;
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}
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rtems_shell_cmd_t rtems_shell_CMDCHOWN_Command = {
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.name = "cmdchown",
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.usage = "cmdchown [OWNER][:[GROUP]] COMMAND...",
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.topic = "misc",
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.command = rtems_shell_main_cmdchown
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};
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