1 files changed, 14 insertions, 3 deletions

diff --git a/debianutils/start_stop_daemon.c b/debianutils/start_stop_daemon.c
index 495ed0a09..7dadc3c9e 100644
--- a/debianutils/start_stop_daemon.c
+++ b/debianutils/start_stop_daemon.c
@@ -31,7 +31,8 @@ Options controlling process matching
 [TODO: can PROCESS_NAME be a full pathname? Should we require full match then
 with /proc/$PID/exe or argv[0] (comm can't be matched, it never contains path)]
         -x,--exec EXECUTABLE    Look for processes that were started with this
-                                command in /proc/$PID/cmdline.
+                                command in /proc/$PID/exe and /proc/$PID/cmdline
+                                (/proc/$PID/cmdline is a bbox extension)
                                 Unlike -n, we match against the full path:
                                 "ntpd" != "./ntpd" != "/path/to/ntpd"
         -p,--pidfile PID_FILE   Look for processes with PID from this file
@@ -68,7 +69,7 @@ Misc options:
 //usage:     "\n        -n,--name NAME          Match processes with NAME"
 //usage:     "\n                                in comm field in /proc/PID/stat"
 //usage:     "\n        -x,--exec EXECUTABLE    Match processes with this command"
-//usage:     "\n                                in /proc/PID/cmdline"
+//usage:     "\n                                in /proc/PID/{exe,cmdline}"
 //usage:     "\n        -p,--pidfile FILE       Match a process with PID from the file"
 //usage:     "\n        All specified conditions must match"
 //usage:     "\n-S only:"
@@ -198,8 +199,18 @@ static int pid_is_exec(pid_t pid)
 {
         ssize_t bytes;
         char buf[sizeof("/proc/%u/cmdline") + sizeof(int)*3];
+        char *procname, *exelink;
+        int match;
 
-        sprintf(buf, "/proc/%u/cmdline", (unsigned)pid);
+        procname = buf + sprintf(buf, "/proc/%u/exe", (unsigned)pid) - 3;
+
+        exelink = xmalloc_readlink(buf);
+        match = (exelink && strcmp(execname, exelink) == 0);
+        free(exelink);
+        if (match)
+                return match;
+
+        strcpy(procname, "cmdline");
         bytes = open_read_close(buf, G.execname_cmpbuf, G.execname_sizeof);
         if (bytes > 0) {
                 G.execname_cmpbuf[bytes] = '\0';