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/* chmod - change file modes
* Copyright (C) 2022 Ferass EL HAFIDI
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the copyright holder 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 HOLDER 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 <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include "version.h"
#ifndef COMPILETIME
#define COMPILETIME
#endif
int getopt(int argc, char *const argv[], const char *optstring);
void printUsage();
int main(int argc, char *const argv[]) {
int argument, i = 0;
mode_t modes, owner_modes, group_modes, other_modes;
if (argc == 1) {
printUsage();
return 1;
}
while ((argument = getopt(argc, argv, "")) != -1) {
if (argument == '?') {
printUsage();
return 1;
}
}
/* I know there's a better way of doing it, please let me know if you
* know a better way of doing it
*/
if (argv[1][i] == '0') i++;
switch (argv[1][i]) {
/* Owner modes */
case '7':
owner_modes = S_IRWXU;
break;
case '4':
owner_modes = S_IRUSR;
break;
case '2':
owner_modes = S_IWUSR;
break;
case '1':
owner_modes = S_IXUSR;
break;
default:
printUsage();
return 1;
}
i++;
switch (argv[1][i]) {
/* Group modes */
case '7':
group_modes = S_IRWXG;
break;
case '4':
group_modes = S_IRGRP;
break;
case '2':
group_modes = S_IWGRP;
break;
case '1':
group_modes = S_IXGRP;
break;
default:
printUsage();
return 1;
}
i++;
switch (argv[1][i]) {
/* Other modes */
case '7':
other_modes = S_IRWXO;
break;
case '4':
other_modes = S_IROTH;
break;
case '2':
other_modes = S_IWOTH;
break;
case '1':
other_modes = S_IXOTH;
break;
default:
printUsage();
return 1;
}
chmod(argv[2], owner_modes | group_modes | other_modes);
return 0;
}
void printUsage() {
printf("Ferass' Base System. (%s)\n\n"
"Usage: chmod mode file\n\n"
"Change file modes.\n\n", COMPILETIME);
}
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