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/* chgrp.c - Change user and group ownership
*
* Copyright 2012 Georgi Chorbadzhiyski <georgi@unixsol.org>
*
* See http://opengroup.org/onlinepubs/9699919799/utilities/chown.html
* See http://opengroup.org/onlinepubs/9699919799/utilities/chgrp.html
*
* TODO: group only one of [HLP]
USE_CHGRP(NEWTOY(chgrp, "<2hPLHRfv", TOYFLAG_BIN))
USE_CHGRP(OLDTOY(chown, chgrp, "<2hPLHRfv", TOYFLAG_BIN))
config CHGRP
bool "chgrp/chown"
default y
help
usage: chown [-RHLP] [-fvh] [owner][:group] file...
usage: chgrp [-RHLP] [-fvh] group file...
Change ownership of one or more files.
-f suppress most error messages.
-h change symlinks instead of what they point to
-R recurse into subdirectories (implies -h).
-H with -R change target of symlink, follow command line symlinks
-L with -R change target of symlink, follow all symlinks
-P with -R change symlink, do not follow symlinks (default)
-v verbose output.
*/
#define FOR_chgrp
#include "toys.h"
GLOBALS(
uid_t owner;
gid_t group;
char *owner_name, *group_name;
int symfollow;
)
static int do_chgrp(struct dirtree *node)
{
int fd, ret, flags = toys.optflags;
// Depth first search
if (!dirtree_notdotdot(node)) return 0;
if ((flags & FLAG_R) && node->data != -1 && S_ISDIR(node->st.st_mode))
return DIRTREE_COMEAGAIN|((flags&FLAG_L) ? DIRTREE_SYMFOLLOW : 0);
fd = dirtree_parentfd(node);
ret = fchownat(fd, node->name, TT.owner, TT.group,
(flags&(FLAG_L|FLAG_H)) || !(flags&(FLAG_h|FLAG_R))
? 0 : AT_SYMLINK_NOFOLLOW);
if (ret || (flags & FLAG_v)) {
char *path = dirtree_path(node, 0);
if (flags & FLAG_v)
xprintf("%s %s%s%s %s\n", toys.which->name,
TT.owner_name ? TT.owner_name : "",
toys.which->name[2]=='o' && TT.group_name ? ":" : "",
TT.group_name ? TT.group_name : "", path);
if (ret == -1 && !(toys.optflags & FLAG_f))
perror_msg("changing owner:group of '%s' to '%s:%s'", path,
TT.owner_name, TT.group_name);
free(path);
}
toys.exitval |= ret;
return 0;
}
void chgrp_main(void)
{
int ischown = toys.which->name[2] == 'o', hl = toys.optflags&(FLAG_H|FLAG_L);
char **s, *own;
// Distinguish chown from chgrp
if (ischown) {
char *grp;
struct passwd *p;
own = xstrdup(*toys.optargs);
if ((grp = strchr(own, ':')) || (grp = strchr(own, '.'))) {
*(grp++) = 0;
TT.group_name = grp;
}
if (*own) {
TT.owner_name = own;
p = getpwnam(own);
// TODO: trailing garbage?
if (!p && isdigit(*own)) p=getpwuid(atoi(own));
if (!p) error_exit("no user '%s'", own);
TT.owner = p->pw_uid;
}
} else TT.group_name = *toys.optargs;
if (TT.group_name) {
struct group *g;
g = getgrnam(TT.group_name);
if (!g) g=getgrgid(atoi(TT.group_name));
if (!g) error_exit("no group '%s'", TT.group_name);
TT.group = g->gr_gid;
}
for (s=toys.optargs+1; *s; s++) {
struct dirtree *new = dirtree_add_node(0, *s, hl);
if (new) dirtree_handle_callback(new, do_chgrp);
else toys.exitval = 1;
}
if (CFG_TOYBOX_FREE) free(own);
}
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