Added the checkown applet based on the work by Renato Caldas, #192682

checkdir ensures that the specified files (or directories) are owned
by the current user/group or as specified on the command line. You can
optionally check permissions too.

ChangeLog

@@ -3,6 +3,11 @@
 
   19 Sep 2007; Roy Marples <uberlord@gentoo.org>:
 
+    Added the checkown applet based on the work by Renato Caldas, #192682
+    checkdir ensures that the specified files (or directories) are owned
+    by the current user/group or as specified on the command line. You can
+    optionally check permissions too.
+
     Change from /lib/rcscripts to /lib/rc and adjust our files so changing
     our libdir is much easier in future. This move makes sense it's so much
     more than a holding place for our scripts now. It also has the added

src/Makefile

@@ -56,7 +56,7 @@ LIBRCSO = librc.so.$(LIBRCSOVER)
 LIBRCOBJS = librc.o librc-depend.o librc-daemon.o librc-misc.o librc-strlist.o
 LDLIBS_LIBRC = -leinfo
 
-RCOBJS = env-update.o fstabinfo.o mountinfo.o \
+RCOBJS = checkown.o env-update.o fstabinfo.o mountinfo.o \
 		 rc-depend.o rc-plugin.o rc-status.o rc-update.o runscript.o \
 		 start-stop-daemon.o rc.o
 LDLIBS_RC = $(LDLIBS_LIBRC) -lrc
@@ -80,7 +80,7 @@ RCLINKS = einfon einfo ewarnn ewarn eerrorn eerror ebegin eend ewend \
 	      mark_service_coldplugged \
 	      get_options save_options rc-abort rc-depend \
 	      is_runlevel_start is_runlevel_stop service_started_daemon \
-		  fstabinfo mountinfo
+		  checkown fstabinfo mountinfo
 BINLINKS = rc-status
 SBINLINKS = env-update rc-update runscript start-stop-daemon
 

src/_usage.h

@@ -7,12 +7,14 @@
  * Released under the GPLv2
  */
 
-#define getoptstring_COMMON "Ch"
+#define getoptstring_COMMON "Chq"
 #define longopts_COMMON \
 	{ "help",           0, NULL, 'h'}, \
-	{ "nocolor",        0, NULL, 'C'},
+	{ "nocolor",        0, NULL, 'C'}, \
+	{ "quiet",			0, NULL, 'q'},
 
 #define case_RC_COMMON_GETOPT \
 	case 'C': setenv ("RC_NOCOLOR", "yes", 1); break; \
 	case 'h': usage (EXIT_SUCCESS); \
+	case 'q': setenv ("RC_QUIET", "yes", 1); break; \
 	default:  usage (EXIT_FAILURE);

src/builtins.h

@@ -7,6 +7,7 @@
  * Released under the GPLv2
  */
 
+int checkown (int argc, char **argv);
 int env_update (int argc, char **argv);
 int fstabinfo (int argc, char **argv);
 int mountinfo (int argc, char **argv);

src/checkown.c

@@ -0,0 +1,179 @@
+/*
+   checkown.c
+   Checks for the existance of a directory and creates it
+   if necessary. It can also correct its ownership.
+
+   Copyright 2007 Gentoo Foundation
+   */
+
+#define APPLET "checkown"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <getopt.h>
+#include <grp.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "builtins.h"
+#include "einfo.h"
+
+static char *applet = NULL;
+
+static int do_check (char *path, uid_t uid, gid_t gid, mode_t mode)
+{
+	struct stat dirstat;
+
+	memset (&dirstat, 0, sizeof (dirstat));
+
+	if (stat (path, &dirstat)) {
+		einfo ("%s: creating directory", path);
+		if (! mode)
+			mode = S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH;
+		if (mkdir (path, mode)) {
+			eerror ("%s: mkdir: %s", applet, strerror (errno));
+			return (-1);
+		}
+	} else if (mode && (dirstat.st_mode & 0777) != mode) {
+		einfo ("%s: correcting mode", applet);
+		if (chmod (path, mode)) {
+			eerror ("%s: chmod: %s", applet, strerror (errno));
+			return (-1);
+		}
+	}
+
+	if (dirstat.st_uid != uid || dirstat.st_gid != gid) {
+		if (dirstat.st_dev || dirstat.st_ino)
+			einfo ("%s: correcting owner", path);
+		if (chown (path, uid, gid)) {
+			eerror ("%s: chown: %s", applet, strerror (errno));
+			return (-1);
+		}
+	}
+
+	return (0);
+}
+
+/* Based on busybox */
+static int parse_mode (mode_t *mode, char *text)
+{
+	/* Check for a numeric mode */
+	if ((*mode - '0') < 8) {
+		char *p;
+		unsigned long l = strtoul (text, &p, 8);
+		if (*p || l > 07777U) {
+			errno = EINVAL;
+			return (-1);
+		}
+		*mode = l;
+		return (0);
+	}
+
+	/* We currently don't check g+w type stuff */
+	errno = EINVAL;
+	return (-1);
+}
+
+static struct passwd *get_user (char **name)
+{
+	struct passwd *pw;
+	char *p = *name;
+	char *token;
+	int tid;
+
+	token = strsep (&p, ":");
+	if (sscanf (token, "%d", &tid) != 1)
+		pw = getpwnam (token);
+	else
+		pw = getpwuid (tid);
+
+	if (! pw)
+		eerrorx ("%s: user `%s' not found", applet, token);
+
+	*name = p;
+	return (pw);
+}
+
+static struct group *get_group (const char *name)
+{
+	struct group *gr;
+	int tid;
+
+	if (sscanf (name, "%d", &tid) != 1)
+		gr = getgrnam (name);
+	else
+		gr = getgrgid (tid);
+
+	if (! gr)
+		eerrorx ("%s: group `%s' not found", applet, name);
+
+	return (gr);
+}
+
+#include "_usage.h"
+#define getoptstring "m:g:u:" getoptstring_COMMON
+static struct option longopts[] = {
+	{ "mode",			1, NULL, 'm'},
+	{ "user",           1, NULL, 'u'},
+	{ "group",          1, NULL, 'g'},
+	longopts_COMMON
+	{ NULL,             0, NULL, 0}
+};
+#include "_usage.c"
+
+int checkown (int argc, char **argv)
+{
+	int opt;
+	uid_t uid = geteuid();
+	gid_t gid = getgid();
+	mode_t mode = 0;
+
+	struct passwd *pw = NULL;
+	struct group *gr = NULL;
+	char *p;
+	int retval = EXIT_SUCCESS;
+
+	applet = argv[0];
+
+	while ((opt = getopt_long (argc, argv, getoptstring,
+							   longopts, (int *) 0)) != -1)
+	{
+		switch (opt) {
+			case 'm':
+				if (parse_mode (&mode, optarg))
+					eerrorx ("%s: invalid mode `%s'", applet, optarg);
+				break;
+			case 'u':
+				p = optarg;
+				pw = get_user (&p);
+				if (p && *p)
+					optarg = p;
+				else
+					break;
+			case 'g':
+				gr = get_group (optarg);
+				break;
+
+				case_RC_COMMON_GETOPT
+		}
+	}
+
+	if (pw) {
+		uid = pw->pw_uid;
+		gid = pw->pw_gid;
+	}
+	if (gr)
+		gid = gr->gr_gid;
+
+	while (optind < argc) {
+		if (do_check (argv[optind], uid, gid, mode))
+			retval = EXIT_FAILURE;
+		optind++;
+	}
+
+	exit (retval);
+}

src/mountinfo.c

@@ -259,7 +259,6 @@ static struct option longopts[] = {
 	{ "options",             0, NULL, 'i'},
 	{ "fstype",              0, NULL, 's'},
 	{ "node",                0, NULL, 't'},
-	{ "quiet",               0, NULL, 'q'},
 	longopts_COMMON
 	{ NULL,             0, NULL, 0}
 };
@@ -274,7 +273,6 @@ int mountinfo (int argc, char **argv)
 	char **nodes = NULL;
 	char *n;
 	int opt;
-	bool quiet = false;
 	int result;
 
 #define DO_REG(_var) \
@@ -321,9 +319,6 @@ int mountinfo (int argc, char **argv)
 			case 't':
 				args.mount_type = mount_from;
 				break;
-			case 'q':
-				quiet = true;
-				break;
 
 				case_RC_COMMON_GETOPT
 		}
@@ -358,7 +353,7 @@ int mountinfo (int argc, char **argv)
 			continue;
 		if (skip_point_regex && regexec (skip_point_regex, n, 0, NULL, 0) == 0)
 			continue;
-		if (! quiet)
+		if (! rc_is_env ("RC_QUIET", "yes"))
 			printf ("%s\n", n);
 		result = EXIT_SUCCESS;
 	}

src/rc.c

@@ -759,6 +759,8 @@ int main (int argc, char **argv)
 		exit (runscript (argc, argv));
 	else if (strcmp (applet, "start-stop-daemon") == 0)
 		exit (start_stop_daemon (argc, argv));
+	else if (strcmp (applet, "checkown") == 0)
+		exit (checkown (argc, argv));
 
 	argc--;
 	argv++;

src/start-stop-daemon.c

@@ -461,7 +461,7 @@ static void handle_signal (int sig)
 
 
 #include "_usage.h"
-#define getoptstring "KN:R:Sbc:d:g:mn:op:qs:tu:r:vx:1:2:" getoptstring_COMMON
+#define getoptstring "KN:R:Sbc:d:g:mn:op:s:tu:r:vx:1:2:" getoptstring_COMMON
 static struct option longopts[] = {
 	{ "stop",         0, NULL, 'K'},
 	{ "nicelevel",    1, NULL, 'N'},
@@ -476,7 +476,6 @@ static struct option longopts[] = {
 	{ "name",         1, NULL, 'n'},
 	{ "oknodo",       0, NULL, 'o'},
 	{ "pidfile",      1, NULL, 'p'},
-	{ "quiet",        0, NULL, 'q'},
 	{ "signal",       1, NULL, 's'},
 	{ "test",         0, NULL, 't'},
 	{ "user",         1, NULL, 'u'},
@@ -507,7 +506,7 @@ int start_stop_daemon (int argc, char **argv)
 	bool stop = false;
 	bool oknodo = false;
 	bool test = false;
-	bool quiet = false;
+	bool quiet;
 	bool verbose = false;
 	char *exec = NULL;
 	char *cmd = NULL;
@@ -635,10 +634,6 @@ int start_stop_daemon (int argc, char **argv)
 				pidfile = optarg;
 				break;
 
-			case 'q':  /* --quiet */
-				quiet = true;
-				break;
-
 			case 's':  /* --signal <signal> */
 				sig = parse_signal (optarg);
 				break;
@@ -671,9 +666,7 @@ int start_stop_daemon (int argc, char **argv)
 				case_RC_COMMON_GETOPT
 		}
 
-	/* Respect RC as well as how we are called */
-	if (rc_is_env ("RC_QUIET", "yes") && ! verbose)
-		quiet = true;
+	quiet = rc_is_env ("RC_QUIET", "yes");
 
 	/* Allow start-stop-daemon --signal HUP --exec /usr/sbin/dnsmasq
 	 * instead of forcing --stop --oknodo as well */