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