[ltt-dev] [UST PATCH] Only send the pids that are currently online in ustclt_get_online_pids().

[Matthew Khouzam]

Signed-off-by: Matthew Khouzam <matthew.khouzam at ericsson.com>
---
 libustctl/libustctl.c |   14 +++++++++++++-
 1 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/libustctl/libustctl.c b/libustctl/libustctl.c
index d57e645..443cbb9 100644
--- a/libustctl/libustctl.c
+++ b/libustctl/libustctl.c
@@ -92,6 +92,8 @@ pid_t *ustctl_get_online_pids(void)
 {
 	struct dirent *dirent;
 	DIR *dir;
+	DIR *proc_dir;
+	char proc_dir_path[PATH_MAX];
 	unsigned int ret_size = 1 * sizeof(pid_t), i = 0;
 
 	dir = opendir(SOCK_DIR);
@@ -117,7 +119,17 @@ pid_t *ustctl_get_online_pids(void)
 			 * We need to figure out an intelligent way of solving
 			 * this, maybe connect-disconnect.
 			 */
-			if (1) {
+			 snprintf(proc_dir_path, PATH_MAX, "/proc/%u/", ret[i]);
+			 proc_dir = opendir(proc_dir_path);
+			 /*
+			  * Note:
+			  * maybe we should remove the empty dir in this pass
+			  * too. Since the detection method is not perfect,
+			  * this step is not yet implemented.
+			  * A process can die, and its pid can be still taken
+			  * when reading online pids.
+			  */
+			 if (proc_dir) {
 				ret_size += sizeof(pid_t);
 				ret = (pid_t *) realloc(ret, ret_size);
 				++i;
-- 
1.7.0.4