1 files changed, 73 insertions, 0 deletions
diff --git a/package/toolbox/src/src/chown.c b/package/toolbox/src/src/chown.c
new file mode 100644
index 000000000..d02721718
--- /dev/null
+++ b/package/toolbox/src/src/chown.c
@@ -0,0 +1,73 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <errno.h>
+#include <pwd.h>
+#include <grp.h>
+
+#include <unistd.h>
+#include <time.h>
+
+int main(int argc, char **argv)
+{
+    int i;
+
+    if (argc < 3) {
+        fprintf(stderr, "Usage: chown <USER>[:GROUP] <FILE1> [FILE2] ...\n");
+        return 10;
+    }
+
+    // Copy argv[1] to 'user' so we can truncate it at the period
+    // if a group id specified.
+    char user[32];
+    char *group = NULL;
+    strncpy(user, argv[1], sizeof(user));
+    if ((group = strchr(user, ':')) != NULL) {
+        *group++ = '\0';
+    } else if ((group = strchr(user, '.')) != NULL) {
+        *group++ = '\0';
+    }
+
+    // Lookup uid (and gid if specified)
+    struct passwd *pw;
+    struct group *grp = NULL;
+    uid_t uid;
+    gid_t gid = -1; // passing -1 to chown preserves current group
+
+    pw = getpwnam(user);
+    if (pw != NULL) {
+        uid = pw->pw_uid;
+    } else {
+        char* endptr;
+        uid = (int) strtoul(user, &endptr, 0);
+        if (endptr == user) {  // no conversion
+          fprintf(stderr, "No such user '%s'\n", user);
+          return 10;
+        }
+    }
+
+    if (group != NULL) {
+        grp = getgrnam(group);
+        if (grp != NULL) {
+            gid = grp->gr_gid;
+        } else {
+            char* endptr;
+            gid = (int) strtoul(group, &endptr, 0);
+            if (endptr == group) {  // no conversion
+                fprintf(stderr, "No such group '%s'\n", group);
+                return 10;
+            }
+        }
+    }
+
+    for (i = 2; i < argc; i++) {
+        if (chown(argv[i], uid, gid) < 0) {
+            fprintf(stderr, "Unable to chown %s: %s\n", argv[i], strerror(errno));
+            return 10;
+        }
+    }
+
+    return 0;
+}