sbase/chmod.c

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C
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/* See LICENSE file for copyright and license details. */
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include "util.h"
static void chmodr(const char *);
static bool rflag = false;
static int oper = '=';
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static mode_t mode = 0;
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static void
usage(void)
{
eprintf("usage: %s [-R] mode [file...]\n", argv0);
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}
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int
main(int argc, char *argv[])
{
int c;
argv0 = argv[0];
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while (--argc > 0 && (*++argv)[0] == '-') {
while ((c = *++argv[0])) {
switch (c) {
case 'R':
rflag = true;
break;
case 'r': case 'w': case 'x': case 's': case 't':
/*
* -[rwxst] are valid modes so do not interpret
* them as options - in any case we are done if
* we hit this case
*/
--argv[0];
goto done;
default:
usage();
}
}
}
done:
parsemode(argv[0], &mode, &oper);
argv++;
argc--;
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if(argc < 1)
usage();
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for (; argc > 0; argc--, argv++)
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chmodr(argv[0]);
return EXIT_SUCCESS;
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}
void
chmodr(const char *path)
{
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struct stat st;
if(stat(path, &st) == -1)
eprintf("stat %s:", path);
switch(oper) {
case '+':
st.st_mode |= mode;
break;
case '-':
st.st_mode &= ~mode;
break;
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case '=':
st.st_mode = mode;
break;
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}
if(chmod(path, st.st_mode) == -1)
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eprintf("chmod %s:", path);
if(rflag)
recurse(path, chmodr);
}