From 79a6bee6822a37cba33f26f8c592fedb023dca89 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Wed, 8 Mar 2006 11:38:51 -0500
Subject: [PATCH] ENH: Added implementation of process tree killing that runs
"ps" to traverse the tree.
---
ProcessUNIX.c | 45 +++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 43 insertions(+), 2 deletions(-)
diff --git a/ProcessUNIX.c b/ProcessUNIX.c
index 488e6bc6..d9e6691d 100644
--- a/ProcessUNIX.c
+++ b/ProcessUNIX.c
@@ -1898,6 +1898,22 @@ static pid_t kwsysProcessFork(kwsysProcess* cp,
}
}
+/*--------------------------------------------------------------------------*/
+/* For systems without the /proc filesystem we try to obtain process
+ information by invoking the ps command. Here we define the command
+ to call on each platform and the corresponding parsing format
+ string. The parsing format should have two integers to store: the
+ pid and then the ppid. */
+#if defined(__linux__) || defined(__APPLE__)
+# define KWSYSPE_PS_COMMAND "ps axo pid,ppid"
+# define KWSYSPE_PS_HEADER "%*s %*s\n"
+# define KWSYSPE_PS_FORMAT "%d %d\n"
+#elif defined(__hpux) && 0 /* Disable until tested. */
+# define KWSYSPE_PS_COMMAND "ps -ef"
+# define KWSYSPE_PS_HEADER "%*s %*s %*s %*s %*s %*s %*s %*s\n"
+# define KWSYSPE_PS_FORMAT "%*s %d %d %*s %*s %*s %*s %*s\n"
+#endif
+
/*--------------------------------------------------------------------------*/
static void kwsysProcessKill(pid_t process_id)
{
@@ -1906,8 +1922,8 @@ static void kwsysProcessKill(pid_t process_id)
/* Suspend the process to be sure it will not create more children. */
kill(process_id, SIGSTOP);
- /* Kill all children if we can find them. Currently this works only
- on systems that support the proc filesystem. */
+ /* Kill all children if we can find them. First try using the /proc
+ filesystem. */
if((procdir = opendir("/proc")) != NULL)
{
#if defined(MAXPATHLEN)
@@ -1962,6 +1978,31 @@ static void kwsysProcessKill(pid_t process_id)
}
closedir(procdir);
}
+#if defined(KWSYSPE_PS_COMMAND)
+ else
+ {
+ /* Try running "ps" to get the process information. */
+ FILE* ps = popen(KWSYSPE_PS_COMMAND, "r");
+
+ /* Make sure the process started and provided a valid header. */
+ if(ps && fscanf(ps, KWSYSPE_PS_HEADER) != EOF)
+ {
+ /* Look for processes whose parent is the process being killed. */
+ int pid, ppid;
+ while(fscanf(ps, KWSYSPE_PS_FORMAT, &pid, &ppid) == 2)
+ {
+ if(ppid == process_id)
+ {
+ /* Recursively kill this child aned its children. */
+ kwsysProcessKill(pid);
+ }
+ }
+
+ /* We are done with the ps process. */
+ pclose(ps);
+ }
+ }
+#endif
/* Kill the process. */
kill(process_id, SIGKILL);
--
GitLab