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/*
* UNG's Not GNU
*
* Copyright (c) 2011, Jakob Kaivo <jakob@kaivo.net>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <getopt.h>
#include <grp.h>
#include <pwd.h>
#include <limits.h>
#include <ftw.h>
#include <string.h>
#include <stdlib.h>
const char *chown_desc = "change the file ownership";
const char *chown_inv = "chown [-h] owner[:group] file...\nchown -R [-H|-L|-P] owner[:group] file...";
#define NOFOLLOW 0
#define FOLLOWARGV 1
#define FOLLOWALL 2
static int recursive = 0;
static int links = FOLLOWARGV;
static uid_t newowner = -1;
static gid_t newgroup = -1;
int _chown (const char*);
int nftw_chown (const char *p, const struct stat *sb, int typeflag, struct FTW *f)
{
_chown (p);
}
int _chown (const char *p)
{
struct stat st;
if (lstat (p, &st) != 0) {
perror (p);
return 1;
}
// FIXME: about symlinks....
// if (links == NOFOLLOW
// lchown (p, newowner, newgroup)
if (chown (p, newowner, newgroup) != 0)
perror (p);
return 0;
}
static void chown_parse (const char *ug)
{
char *colon = strchr (ug, ':');
if (colon == NULL) {
struct passwd *pwd = getpwnam (ug);
if (pwd == NULL)
exit (1);
newowner = pwd->pw_uid;
} else {
struct passwd *pwd;
struct group *grp;
char user[NAME_MAX];
strcpy (user, ug);
user[strlen(ug)-strlen(colon)] = '\0';
pwd = getpwnam (user);
grp = getgrnam (&colon[1]);
if (pwd == NULL || grp == NULL)
exit (1);
newowner = pwd->pw_uid;
newgroup = grp->gr_gid;
}
}
int do_chown (char *path, int recurse, int howlinks, uid_t uid, gid_t gid)
{
recursive = recurse;
links = howlinks;
newowner = uid;
newgroup = gid;
// FIXME: This is where to recurse and handle the difference betwixt links types
_chown (path);
}
int
main (int argc, char **argv)
{
int c;
while ((c = getopt (argc, argv, ":hHLPR")) != -1) {
switch (c) {
case 'h':
if (recursive)
return 1;
recursive = -1;
links = NOFOLLOW;
break;
case 'H':
links = FOLLOWARGV;
break;
case 'L':
links = FOLLOWALL;
break;
case 'P':
links = NOFOLLOW;
break;
case 'R':
if (recursive == -1)
return 1;
recursive = 1;
break;
default:
return 1;
}
}
if (optind >= argc - 1)
return 1;
chown_parse (argv[optind++]);
while (optind < argc) {
do_chown (argv[optind], recursive, links, newowner, newgroup);
optind++;
}
return 0;
}
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