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/* vi: set sw=4 ts=4:
*
* chown.c - Change ownership
*
* Copyright 2012 Georgi Chorbadzhiyski <georgi@unixsol.org>
*
* See http://pubs.opengroup.org/onlinepubs/009695399/utilities/chown.html
*
* TODO: Add support for -h
* TODO: Add support for -H
* TODO: Add support for -L
* TODO: Add support for -P
USE_CHOWN(NEWTOY(chown, "<2Rfv", TOYFLAG_BIN))
config CHOWN
bool "chown"
default y
help
usage: chown [-R] [-f] [-v] group file...
Change ownership of one or more files.
-R recurse into subdirectories.
-f suppress most error messages.
-v verbose output.
*/
#include "toys.h"
#define FLAG_R 4
#define FLAG_f 2
#define FLAG_v 1
DEFINE_GLOBALS(
uid_t owner;
gid_t group;
char *owner_name;
char *group_name;
)
#define TT this.chown
static int do_chown(const char *path) {
int ret = chown(path, TT.owner, TT.group);
if (toys.optflags & FLAG_v)
xprintf("chown(%s:%s, %s)\n", TT.owner_name, TT.group_name, path);
if (ret == -1 && !(toys.optflags & FLAG_f))
perror_msg("changing owner of '%s' to '%s:%s'", path,
TT.owner_name, TT.group_name);
toys.exitval |= ret;
return ret;
}
// Copied from toys/cp.c:cp_node()
int chown_node(char *path, struct dirtree *node)
{
char *s = path + strlen(path);
struct dirtree *n = node;
for ( ; ; n = n->parent) {
while (s!=path) {
if (*(--s) == '/') break;
}
if (!n) break;
}
if (s != path) s++;
do_chown(s);
return 0;
}
void chown_main(void)
{
char **s;
char *owner = NULL, *group;
char *param1 = *toys.optargs;
TT.owner = -1;
TT.group = -1;
TT.owner_name = "";
TT.group_name = "";
group = strchr(param1, ':');
if (!group)
group = strchr(param1, '.');
if (group) {
group++;
struct group *g = getgrnam(group);
if (!g) {
error_msg("invalid group '%s'", group);
toys.exitval = 1;
return;
}
TT.group = g->gr_gid;
TT.group_name = group;
owner = param1;
owner[group - owner - 1] = '\0';
} else {
owner = param1;
}
if (owner && owner[0]) {
struct passwd *p = getpwnam(owner);
if (!p) {
error_msg("invalid owner '%s'", owner);
toys.exitval = 1;
return;
}
TT.owner = p->pw_uid;
TT.owner_name = owner;
}
if (toys.optflags & FLAG_R) {
// Recurse into subdirectories
for (s=toys.optargs + 1; *s; s++) {
struct stat sb;
if (stat(*s, &sb) == -1) {
if (!(toys.optflags & FLAG_f))
perror_msg("%s", *s);
continue;
}
do_chown(*s);
if (S_ISDIR(sb.st_mode)) {
strncpy(toybuf, *s, sizeof(toybuf) - 1);
toybuf[sizeof(toybuf) - 1] = 0;
dirtree_read(toybuf, NULL, chown_node);
}
}
} else {
// Do not recurse
for (s=toys.optargs + 1; *s; s++) {
do_chown(*s);
}
}
}
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