122 lines
2.6 KiB
C
122 lines
2.6 KiB
C
#define _POSIX_C_SOURCE 200809L
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <stdlib.h>
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mode_t parse_mode(char *);
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int main(int argc, char * argv[]) {
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char c; mode_t mode; char * mode_text = NULL;
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int failed = 0;
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while((c = getopt(argc, argv, "m:")) != -1) {
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if(c == 'm') {
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mode_text = optarg;
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}
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}
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mode = mode_text != NULL ? parse_mode(mode_text) : 0666;
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for(; optind < argc; optind++) {
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int ohno = mkfifo(argv[optind], mode);
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if(ohno != 0) {
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failed = 1;
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}
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}
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if(failed == 0) {
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return 0;
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}
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else {
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return 1;
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}
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}
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mode_t parse_mode(char * symbolic) {
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if(symbolic[0] >= '0' && symbolic[0] <= '9') {
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return strtol(symbolic, NULL, 8);
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}
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int i = 0; int who; int perm;
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while(symbolic[i] != '+' && symbolic[i] != '-' &&
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symbolic[i] != '=' && symbolic[i] != '\0') {
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switch(symbolic[i++]) {
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case 'u': who |= 01; break;
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case 'g': who |= 02; break;
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case 'o': who |= 04; break;
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case 'a': who |= 07; break;
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}
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}
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int j = i;
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while(symbolic[i] != '\0' && symbolic[i] != ',') {
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switch(symbolic[++i]) {
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case 'r': perm |= 01; break;
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case 'w': perm |= 02; break;
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case 'x': perm |= 04; break;
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}
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}
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mode_t mode = 0666;
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if(symbolic[j] == '+') {
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if(who & 01) {
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mode |= (perm & 01) ? 0400 : 0;
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mode |= (perm & 02) ? 0200 : 0;
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mode |= (perm & 04) ? 0100 : 0;
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}
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if(who & 02) {
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mode |= (perm & 01) ? 040 : 0;
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mode |= (perm & 02) ? 020 : 0;
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mode |= (perm & 04) ? 010 : 0;
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}
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if(who & 04) {
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mode |= (perm & 01) ? 04 : 0;
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mode |= (perm & 02) ? 02 : 0;
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mode |= (perm & 04) ? 01 : 0;
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}
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}
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else if(symbolic[j] == '=') {
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mode = 0;
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if(who & 01) {
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mode |= (perm & 01) ? 0400 : 0;
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mode |= (perm & 02) ? 0200 : 0;
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mode |= (perm & 04) ? 0100 : 0;
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}
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if(who & 02) {
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mode |= (perm & 01) ? 040 : 0;
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mode |= (perm & 02) ? 020 : 0;
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mode |= (perm & 04) ? 010 : 0;
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}
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if(who & 04) {
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mode |= (perm & 01) ? 04 : 0;
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mode |= (perm & 02) ? 02 : 0;
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mode |= (perm & 04) ? 01 : 0;
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}
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}
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else if(symbolic[j] == '-') {
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if(who & 01) {
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mode ^= (perm & 01) ? 0400 : 0;
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mode ^= (perm & 02) ? 0200 : 0;
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mode ^= (perm & 04) ? 0100 : 0;
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}
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if(who & 02) {
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mode ^= (perm & 01) ? 040 : 0;
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mode ^= (perm & 02) ? 020 : 0;
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mode ^= (perm & 04) ? 010 : 0;
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}
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if(who & 04) {
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mode ^= (perm & 01) ? 04 : 0;
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mode ^= (perm & 02) ? 02 : 0;
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mode ^= (perm & 04) ? 01 : 0;
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}
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}
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else {
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return 0000;
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}
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return mode;
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} |