Initial revision

1 files changed, 275 insertions, 0 deletions

diff --git a/src/chgrp.c b/src/chgrp.c
new file mode 100644
index 000000000..aeb638f0a
--- /dev/null
+++ b/src/chgrp.c
@@ -0,0 +1,275 @@
+/* chgrp -- change group ownership of files
+   Copyright (C) 1989, 1990, 1991 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
+
+#include <stdio.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <grp.h>
+#include <getopt.h>
+#include "system.h"
+
+#ifndef _POSIX_VERSION
+struct group *getgrnam ();
+#endif
+
+#ifdef _POSIX_SOURCE
+#define endgrent()
+#endif
+
+int lstat ();
+
+char *savedir ();
+char *xmalloc ();
+char *xrealloc ();
+int change_file_group ();
+int change_dir_group ();
+int isnumber ();
+void describe_change ();
+void error ();
+void parse_group ();
+void usage ();
+
+/* The name the program was run with. */
+char *program_name;
+
+/* If nonzero, change the ownership of directories recursively. */
+int recurse;
+
+/* If nonzero, force silence (no error messages). */
+int force_silent;
+
+/* If nonzero, describe the files we process. */
+int verbose;
+
+/* If nonzero, describe only owners or groups that change. */
+int changes_only;
+
+/* The name of the group to which ownership of the files is being given. */
+char *groupname;
+
+struct option long_options[] =
+{
+  {"recursive", 0, 0, 'R'},
+  {"changes", 0, 0, 'c'},
+  {"silent", 0, 0, 'f'},
+  {"quiet", 0, 0, 'f'},
+  {"verbose", 0, 0, 'v'},
+  {0, 0, 0, 0}
+};
+
+void
+main (argc, argv)
+     int argc;
+     char **argv;
+{
+  int group;
+  int errors = 0;
+  int optc;
+
+  program_name = argv[0];
+  recurse = force_silent = verbose = changes_only = 0;
+
+  while ((optc = getopt_long (argc, argv, "Rcfv", long_options, (int *) 0))
+	 != EOF)
+    {
+      switch (optc)
+	{
+	case 'R':
+	  recurse = 1;
+	  break;
+	case 'c':
+	  verbose = 1;
+	  changes_only = 1;
+	  break;
+	case 'f':
+	  force_silent = 1;
+	  break;
+	case 'v':
+	  verbose = 1;
+	  break;
+	default:
+	  usage ();
+	}
+    }
+
+  if (optind >= argc - 1)
+    usage ();
+
+  parse_group (argv[optind++], &group);
+
+  for (; optind < argc; ++optind)
+    errors |= change_file_group (argv[optind], group);
+
+  exit (errors);
+}
+
+/* Set *G according to NAME. */
+
+void
+parse_group (name, g)
+     char *name;
+     int *g;
+{
+  struct group *grp;
+
+  groupname = name;
+  if (*name == '\0')
+    error (1, 0, "can not change to null group");
+
+  grp = getgrnam (name);
+  if (grp == NULL)
+    {
+      if (!isnumber (name))
+	error (1, 0, "invalid group `%s'", name);
+      *g = atoi (name);
+    }
+  else
+    *g = grp->gr_gid;
+  endgrent ();		/* Save a file descriptor. */
+}
+
+/* Change the ownership of FILE to GID GROUP.
+   If it is a directory and -R is given, recurse.
+   Return 0 if successful, 1 if errors occurred. */
+
+int
+change_file_group (file, group)
+     char *file;
+     int group;
+{
+  struct stat file_stats;
+  int errors = 0;
+
+  if (lstat (file, &file_stats))
+    {
+      if (force_silent == 0)
+	error (0, errno, "%s", file);
+      return 1;
+    }
+
+  if (group != file_stats.st_gid)
+    {
+      if (verbose)
+	describe_change (file, 1);
+      if (chown (file, file_stats.st_uid, group))
+	{
+	  if (force_silent == 0)
+	    error (0, errno, "%s", file);
+	  errors = 1;
+	}
+    }
+  else if (verbose && changes_only == 0)
+    describe_change (file, 0);
+
+  if (recurse && S_ISDIR (file_stats.st_mode))
+    errors |= change_dir_group (file, group, &file_stats);
+  return errors;
+}
+
+/* Recursively change the ownership of the files in directory DIR
+   to GID GROUP.
+   STATP points to the results of lstat on DIR.
+   Return 0 if successful, 1 if errors occurred. */
+
+int
+change_dir_group (dir, group, statp)
+     char *dir;
+     int group;
+     struct stat *statp;
+{
+  char *name_space, *namep;
+  char *path;			/* Full path of each entry to process. */
+  unsigned dirlength;		/* Length of `dir' and '\0'. */
+  unsigned filelength;		/* Length of each pathname to process. */
+  unsigned pathlength;		/* Bytes allocated for `path'. */
+  int errors = 0;
+
+  errno = 0;
+  name_space = savedir (dir, statp->st_size);
+  if (name_space == NULL)
+    {
+      if (errno)
+	{
+	  if (force_silent == 0)
+	    error (0, errno, "%s", dir);
+	  return 1;
+	}
+      else
+	error (1, 0, "virtual memory exhausted");
+    }
+
+  dirlength = strlen (dir) + 1;	/* + 1 is for the trailing '/'. */
+  pathlength = dirlength + 1;
+  /* Give `path' a dummy value; it will be reallocated before first use. */
+  path = xmalloc (pathlength);
+  strcpy (path, dir);
+  path[dirlength - 1] = '/';
+
+  for (namep = name_space; *namep; namep += filelength - dirlength)
+    {
+      filelength = dirlength + strlen (namep) + 1;
+      if (filelength > pathlength)
+	{
+	  pathlength = filelength * 2;
+	  path = xrealloc (path, pathlength);
+	}
+      strcpy (path + dirlength, namep);
+      errors |= change_file_group (path, group);
+    }
+  free (path);
+  free (name_space);
+  return errors;
+}
+
+/* Tell the user the group name to which ownership of FILE
+   has been given; if CHANGED is zero, FILE was that group already. */
+
+void
+describe_change (file, changed)
+     char *file;
+     int changed;
+{
+  if (changed)
+    printf ("group of %s changed to %s\n", file, groupname);
+  else
+    printf ("group of %s retained as %s\n", file, groupname);
+}
+
+/* Return nonzero if STR represents an unsigned decimal integer,
+   otherwise return 0. */
+
+int
+isnumber (str)
+     char *str;
+{
+  for (; *str; str++)
+    if (!isdigit (*str))
+      return 0;
+  return 1;
+}
+
+void
+usage ()
+{
+  fprintf (stderr, "\
+Usage: %s [-Rcfv] [--recursive] [--changes] [--silent] [--quiet]\n\
+       [--verbose] group file...\n",
+	   program_name);
+  exit (1);
+}