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8e6ded473c
This is an update of many lingering embedded brains GmbH licenses from the RTEMS License to the 2-BSD license where possible depending on the joint copyrights. Updates #3053.
119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/*
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* Copyright (C) 2014 embedded brains GmbH & Co. KG
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef 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 <limits.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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