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/* chmod - change file modes
* Copyright (C) 2022 Ferass EL HAFIDI
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#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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