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authorGeorgi Chorbadzhiyski <gf@unixsol.org>2012-03-13 21:05:12 -0500
committerGeorgi Chorbadzhiyski <gf@unixsol.org>2012-03-13 21:05:12 -0500
commit410aeba45c96000f4b2990634c6eb0bcb2b2d159 (patch)
treec2a998ab19e370ef5a94335e2388d84f20a8d648 /toys/chown.c
parent7fa9a05de2b79efe5e9c10986cbf1cb8f3abc068 (diff)
downloadtoybox-410aeba45c96000f4b2990634c6eb0bcb2b2d159.tar.gz
New toys - chmod, chown, and chgrp.
Diffstat (limited to 'toys/chown.c')
-rw-r--r--toys/chown.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/toys/chown.c b/toys/chown.c
new file mode 100644
index 00000000..217e393f
--- /dev/null
+++ b/toys/chown.c
@@ -0,0 +1,137 @@
+/* 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);
+ }
+ }
+}