sbase/chown.c

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C
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/* See LICENSE file for copyright and license details. */
#include <errno.h>
#include <grp.h>
#include <pwd.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "util.h"
static void chownpwgr(const char *);
static bool rflag = false;
static struct passwd *pw = NULL;
static struct group *gr = NULL;
int
main(int argc, char *argv[])
{
char c, *owner, *group;
while((c = getopt(argc, argv, "Rr")) != -1)
switch(c) {
case 'R':
case 'r':
rflag = true;
break;
default:
exit(EXIT_FAILURE);
}
if(optind == argc)
eprintf("usage: %s [-Rr] [owner][:group] [file...]\n", argv[0]);
owner = argv[optind++];
if((group = strchr(owner, ':')))
*group++ = '\0';
if(owner && *owner) {
errno = 0;
pw = getpwnam(owner);
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if(errno != 0)
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eprintf("getpwnam %s:", owner);
else if(!pw)
eprintf("getpwnam %s: no such user\n", owner);
}
if(group && *group) {
errno = 0;
gr = getgrnam(group);
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if(errno != 0)
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eprintf("getgrnam %s:", group);
else if(!gr)
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eprintf("getgrnam %s: no such group\n", group);
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}
for(; optind < argc; optind++)
chownpwgr(argv[optind]);
return EXIT_SUCCESS;
}
void
chownpwgr(const char *path)
{
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if(chown(path, pw ? pw->pw_uid : -1, gr ? gr->gr_gid : -1) == -1)
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eprintf("chown %s:", path);
if(rflag)
recurse(path, chownpwgr);
}