132 lines
2.1 KiB
C
132 lines
2.1 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include "util.h"
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static void chmodr(const char *);
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static void parsemode(const char *);
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static bool rflag = false;
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static char oper = '=';
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static mode_t mode = 0;
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static void
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usage(void)
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{
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eprintf("usage: %s [-r] mode [file...]\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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ARGBEGIN {
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case 'r':
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rflag = true;
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break;
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default:
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usage();
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} ARGEND;
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if(argc < 1)
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usage();
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parsemode(argv[0]);
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for(++argv; argc > 0; argc--)
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chmodr(argv[0]);
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return 0;
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}
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void
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chmodr(const char *path)
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{
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struct stat st;
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if(stat(path, &st) == -1)
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eprintf("stat %s:", path);
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switch(oper) {
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case '+':
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st.st_mode |= mode;
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break;
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case '-':
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st.st_mode &= ~mode;
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break;
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case '=':
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st.st_mode = mode;
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break;
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}
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if(chmod(path, st.st_mode) == -1)
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eprintf("chmod %s:", path);
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if(rflag)
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recurse(path, chmodr);
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}
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void
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parsemode(const char *str)
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{
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char *end;
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const char *p;
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int octal;
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mode_t mask = 0;
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octal = strtol(str, &end, 8);
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if(*end == '\0') {
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if(octal & 04000) mode |= S_ISUID;
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if(octal & 02000) mode |= S_ISGID;
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if(octal & 00400) mode |= S_IRUSR;
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if(octal & 00200) mode |= S_IWUSR;
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if(octal & 00100) mode |= S_IXUSR;
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if(octal & 00040) mode |= S_IRGRP;
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if(octal & 00020) mode |= S_IWGRP;
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if(octal & 00010) mode |= S_IXGRP;
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if(octal & 00004) mode |= S_IROTH;
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if(octal & 00002) mode |= S_IWOTH;
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if(octal & 00001) mode |= S_IXOTH;
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return;
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}
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for(p = str; *p; p++)
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switch(*p) {
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/* masks */
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case 'u':
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mask |= S_IRWXU;
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break;
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case 'g':
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mask |= S_IRWXG;
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break;
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case 'o':
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mask |= S_IRWXO;
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break;
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case 'a':
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mask |= S_IRWXU|S_IRWXG|S_IRWXO;
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break;
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/* opers */
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case '+':
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case '-':
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case '=':
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oper = *p;
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break;
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/* modes */
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case 'r':
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mode |= S_IRUSR|S_IRGRP|S_IROTH;
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break;
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case 'w':
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mode |= S_IWUSR|S_IWGRP|S_IWOTH;
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break;
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case 'x':
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mode |= S_IXUSR|S_IXGRP|S_IXOTH;
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break;
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case 's':
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mode |= S_ISUID|S_ISGID;
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break;
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/* error */
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default:
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eprintf("%s: invalid mode\n", str);
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}
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if(mask)
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mode &= mask;
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}
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