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/* vi: set sw=4 ts=4:
*
* chgrp.c - Change group ownership
*
* Copyright 2012 Georgi Chorbadzhiyski <georgi@unixsol.org>
*
* See http://pubs.opengroup.org/onlinepubs/009695399/utilities/chgrp.html
*
* TODO: Add support for -h
* TODO: Add support for -H
* TODO: Add support for -L
* TODO: Add support for -P
USE_CHGRP(NEWTOY(chgrp, "<2Rfv", TOYFLAG_BIN))
config CHGRP
bool "chgrp"
default y
help
usage: chgrp [-R] [-f] [-v] group file...
Change group 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(
gid_t group;
char *group_name;
)
#define TT this.chgrp
static int do_chgrp(struct dirtree *node)
{
int fd, ret = 1, flags = toys.optflags;
if (!dirtree_notdotdot(node)) return 0;
// Handle recursion, and make it depth first
if (S_ISDIR(node->st.st_mode)) {
if (!node->extra) node->extra = dup(node->data);
if ((flags & FLAG_R) && node->data != -1) return DIRTREE_COMEAGAIN;
fd = node->extra;
} else fd = openat(node->parent ? node->parent->data : AT_FDCWD,
node->name, 0);
if (fd != -1) ret = fchown(fd, -1, TT.group);
if (ret || (flags & FLAG_v)) {
char *path = dirtree_path(node, 0);
if (flags & FLAG_v)
xprintf("chgrp(%s, %s)\n", TT.group_name, path);
if (ret == -1 && !(toys.optflags & FLAG_f))
perror_msg("changing group of '%s' to '%s'", path, TT.group_name);
free(path);
}
close(fd);
toys.exitval |= ret;
return 0;
}
void chgrp_main(void)
{
char **s;
struct group *group;
TT.group_name = *toys.optargs;
group = getgrnam(TT.group_name);
if (!group) error_exit("no group '%s'", TT.group_name);
TT.group = group->gr_gid;
for (s=toys.optargs+1; *s; s++) dirtree_read(*s, do_chgrp);
}
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