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ssd: compat: match -x EXECUTABLE by /proc/pid/exe too

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2012-03-05 16:28:07 +01:00
parent 11e61d5c71
commit 17eedcad94
1 changed files with 14 additions and 3 deletions
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17
debianutils/start_stop_daemon.c
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@ -31,7 +31,8 @@ Options controlling process matching
[TODO: can PROCESS_NAME be a full pathname? Should we require full match then [TODO: can PROCESS_NAME be a full pathname? Should we require full match then
with /proc/$PID/exe or argv[0] (comm can't be matched, it never contains path)] with /proc/$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 -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: Unlike -n, we match against the full path:
"ntpd" != "./ntpd" != "/path/to/ntpd" "ntpd" != "./ntpd" != "/path/to/ntpd"
-p,--pidfile PID_FILE Look for processes with PID from this file -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 -n,--name NAME Match processes with NAME"
//usage: "\n in comm field in /proc/PID/stat" //usage: "\n in comm field in /proc/PID/stat"
//usage: "\n -x,--exec EXECUTABLE Match processes with this command" //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 -p,--pidfile FILE Match a process with PID from the file"
//usage: "\n All specified conditions must match" //usage: "\n All specified conditions must match"
//usage: "\n-S only:" //usage: "\n-S only:"
@ -198,8 +199,18 @@ static int pid_is_exec(pid_t pid)
{ {
ssize_t bytes; ssize_t bytes;
char buf[sizeof("/proc/%u/cmdline") + sizeof(int)*3]; 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); bytes = open_read_close(buf, G.execname_cmpbuf, G.execname_sizeof);
if (bytes > 0) { if (bytes > 0) {
G.execname_cmpbuf[bytes] = '\0'; G.execname_cmpbuf[bytes] = '\0';