[PATCH] rtcwake: use poweroff if shutdown is not found

[justinpopo6@xxxxxxxxx]

From: Justin Chen <justinpopo6@xxxxxxxxx>

Some systems do not have the shutdown command. Use poweroff as an
alternative.

Signed-off-by: Justin Chen <justinpopo6@xxxxxxxxx>
---
 include/pathnames.h |  1 +
 sys-utils/rtcwake.c | 39 +++++++++++++++++++++++++++------------
 2 files changed, 28 insertions(+), 12 deletions(-)

diff --git a/include/pathnames.h b/include/pathnames.h
index 3d5052e..ed8ea33 100644
--- a/include/pathnames.h
+++ b/include/pathnames.h
@@ -53,6 +53,7 @@
 # define _PATH_LOGIN		"/bin/login"
 #endif
 #define _PATH_SHUTDOWN		"/sbin/shutdown"
+#define _PATH_POWEROFF		"/sbin/poweroff"
 
 #define _PATH_TERMCOLORS_DIRNAME "terminal-colors.d"
 #define _PATH_TERMCOLORS_DIR	"/etc/" _PATH_TERMCOLORS_DIRNAME
diff --git a/sys-utils/rtcwake.c b/sys-utils/rtcwake.c
index b63c646..029f00f 100644
--- a/sys-utils/rtcwake.c
+++ b/sys-utils/rtcwake.c
@@ -28,6 +28,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/ioctl.h>
+#include <sys/stat.h>
 #include <sys/time.h>
 #include <sys/types.h>
 #include <termios.h>
@@ -582,18 +583,32 @@ int main(int argc, char **argv)
 		char *arg[5];
 		int i = 0;
 
-		if (ctl.verbose)
-			printf(_("suspend mode: off; executing %s\n"),
-						_PATH_SHUTDOWN);
-		arg[i++] = _PATH_SHUTDOWN;
-		arg[i++] = "-h";
-		arg[i++] = "-P";
-		arg[i++] = "now";
-		arg[i]   = NULL;
-		if (!ctl.dryrun) {
-			execv(arg[0], arg);
-			warn(_("failed to execute %s"), _PATH_SHUTDOWN);
-			rc = EXIT_FAILURE;
+		if (!access(_PATH_SHUTDOWN, X_OK)) {
+			arg[i++] = _PATH_SHUTDOWN;
+			arg[i++] = "-h";
+			arg[i++] = "-P";
+			arg[i++] = "now";
+			arg[i]   = NULL;
+		} else if (!access(_PATH_POWEROFF, X_OK)) {
+			arg[i++] = _PATH_POWEROFF;
+			arg[i]   = NULL;
+		} else {
+			arg[i] 	 = NULL;
+		}
+
+		if (arg[0]) {
+			if (ctl.verbose)
+				printf(_("suspend mode: off; executing %s\n"),
+						arg[0]);
+			if (!ctl.dryrun) {
+				execv(arg[0], arg);
+				warn(_("failed to execute %s"), arg[0]);
+				rc = EX_EXEC_ENOENT;
+			}
+		} else {
+			/* Failed to find shutdown command */
+			warn(_("failed to find shutdown command"));
+			rc = EX_EXEC_ENOENT;
 		}
 		break;
 	}
-- 
2.7.4