63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <dirent.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <pwd.h>
|
||
|
|
#include <grp.h>
|
||
|
|
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <time.h>
|
||
|
|
|
||
|
|
int chown_main(int argc, char **argv)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (argc < 3) {
|
||
|
|
fprintf(stderr, "Usage: chown <USER>[.GROUP] <FILE1> [FILE2] ...\n");
|
||
|
|
return 10;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Copy argv[1] to 'user' so we can truncate it at the period
|
||
|
|
// if a group id specified.
|
||
|
|
char user[32];
|
||
|
|
char *group = NULL;
|
||
|
|
strncpy(user, argv[1], sizeof(user));
|
||
|
|
if ((group = strchr(user, '.')) != NULL) {
|
||
|
|
*group++ = '\0';
|
||
|
|
}
|
||
|
|
|
||
|
|
// Lookup uid (and gid if specified)
|
||
|
|
struct passwd *pw;
|
||
|
|
struct group *grp = NULL;
|
||
|
|
uid_t uid;
|
||
|
|
gid_t gid = -1; // passing -1 to chown preserves current group
|
||
|
|
|
||
|
|
pw = getpwnam(user);
|
||
|
|
if (pw == NULL) {
|
||
|
|
fprintf(stderr, "No such user '%s'\n", user);
|
||
|
|
return 10;
|
||
|
|
}
|
||
|
|
uid = pw->pw_uid;
|
||
|
|
|
||
|
|
if (group != NULL) {
|
||
|
|
grp = getgrnam(group);
|
||
|
|
if (grp == NULL) {
|
||
|
|
fprintf(stderr, "No such group '%s'\n", group);
|
||
|
|
return 10;
|
||
|
|
}
|
||
|
|
gid = grp->gr_gid;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 2; i < argc; i++) {
|
||
|
|
if (chown(argv[i], uid, gid) < 0) {
|
||
|
|
fprintf(stderr, "Unable to chmod %s: %s\n", argv[i], strerror(errno));
|
||
|
|
return 10;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|