From df23ba33bd4d1af0a17f607dedd262bfabf3a139 Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Wed, 13 Mar 2019 21:08:53 -0400
Subject: migrate to gitlab

---
 chown.c | 142 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 chown.c

(limited to 'chown.c')

diff --git a/chown.c b/chown.c
new file mode 100644
index 0000000..7d6078e
--- /dev/null
+++ b/chown.c
@@ -0,0 +1,142 @@
+/*
+ * UNG's Not GNU
+ * 
+ * Copyright (c) 2011, Jakob Kaivo <jakob@kaivo.net>
+ * 
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <getopt.h>
+#include <grp.h>
+#include <pwd.h>
+#include <limits.h>
+#include <ftw.h>
+#include <string.h>
+#include <stdlib.h>
+
+const char *chown_desc = "change the file ownership";
+const char *chown_inv  = "chown [-h] owner[:group] file...\nchown -R [-H|-L|-P] owner[:group] file...";
+
+#define NOFOLLOW	0
+#define FOLLOWARGV	1
+#define FOLLOWALL	2
+
+static int recursive = 0;
+static int links = FOLLOWARGV;
+static uid_t newowner = -1;
+static gid_t newgroup = -1;
+
+int _chown (const char*);
+
+int nftw_chown (const char *p, const struct stat *sb, int typeflag, struct FTW *f)
+{
+  _chown (p);
+}
+
+int _chown (const char *p)
+{
+  struct stat st;
+  if (lstat (p, &st) != 0) {
+    perror (p);
+    return 1;
+  }
+
+  // FIXME: about symlinks....
+  // if (links == NOFOLLOW
+  // lchown (p, newowner, newgroup) 
+  if (chown (p, newowner, newgroup) != 0)
+    perror (p);
+  return 0;
+}
+
+static void chown_parse (const char *ug)
+{
+  char *colon = strchr (ug, ':');
+  if (colon == NULL) {
+    struct passwd *pwd = getpwnam (ug);
+    if (pwd == NULL)
+      exit (1);
+    newowner = pwd->pw_uid;
+  } else {
+    struct passwd *pwd;
+    struct group *grp;
+    char user[NAME_MAX];
+    strcpy (user, ug);
+    user[strlen(ug)-strlen(colon)] = '\0';
+    pwd = getpwnam (user);
+    grp = getgrnam (&colon[1]);
+    if (pwd == NULL || grp == NULL)
+      exit (1);
+    newowner = pwd->pw_uid;
+    newgroup = grp->gr_gid;
+  }
+}
+
+int do_chown (char *path, int recurse, int howlinks, uid_t uid, gid_t gid)
+{
+  recursive = recurse;
+  links = howlinks;
+  newowner = uid;
+  newgroup = gid;
+  // FIXME: This is where to recurse and handle the difference betwixt links types
+  _chown (path);
+}
+
+int
+main (int argc, char **argv)
+{
+  int c;
+
+  while ((c = getopt (argc, argv, ":hHLPR")) != -1) {
+    switch (c) {
+      case 'h':
+        if (recursive)
+          return 1;
+        recursive = -1;
+        links = NOFOLLOW;
+        break;
+      case 'H':
+        links = FOLLOWARGV;
+        break;
+      case 'L':
+	links = FOLLOWALL;
+	break;
+      case 'P':
+	links = NOFOLLOW;
+	break;
+      case 'R':
+        if (recursive == -1)
+          return 1;
+        recursive = 1;
+        break;
+      default:
+        return 1;
+    }
+  }
+  
+  if (optind >= argc - 1)
+    return 1;
+
+  chown_parse (argv[optind++]);
+
+  while (optind < argc) {
+    do_chown (argv[optind], recursive, links, newowner, newgroup);
+    optind++;
+  }
+
+  return 0;
+}
-- 
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