Added a check in get online pids to only send the pids that are
currently online.
Signed-off-by: Matthew Khouzam <[email protected]>
---
libustctl/libustctl.c | 13 ++++++++++++-
1 files changed, 12 insertions(+), 1 deletions(-)
diff --git a/libustctl/libustctl.c b/libustctl/libustctl.c
index d57e645..45cc3b8 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 +119,16 @@ 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 it's pid can be still taken when
+ * reading online pids. */
+ if( proc_dir != NULL )
+ {
ret_size += sizeof(pid_t);
ret = (pid_t *) realloc(ret, ret_size);
++i;
--
1.7.0.4
On 11-03-25 11:59 PM, Mathieu Desnoyers wrote:
* Matthew Khouzam ([email protected]) wrote:
Signed-off-by: Matthew Khouzam<[email protected]>
---
libustctl/libustctl.c | 9 ++++++++-
1 files changed, 8 insertions(+), 1 deletions(-)
diff --git a/libustctl/libustctl.c b/libustctl/libustctl.c
index d57e645..3b5ae84 100644
--- a/libustctl/libustctl.c
+++ b/libustctl/libustctl.c
@@ -92,8 +92,11 @@ pid_t *ustctl_get_online_pids(void)
{
struct dirent *dirent;
DIR *dir;
+ DIR *proc_dir;
+ char proc_dir_path[80]; /* proc + / + int always smaller than 80 */
Hi Matthew,
Please don't use hardcoded values like this. It's begging for buffer
overflows. You should use PATH_MAX instead.
unsigned int ret_size = 1 * sizeof(pid_t), i = 0;
dir = opendir(SOCK_DIR);
if (!dir) {
@@ -117,7 +120,11 @@ 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, 80, "/proc/%u/" , ret[i]) ;
Please use PATH_MAX here too.
And if you ever really need to use something smaller (here we really
just don't care about a slightly larger stack size in userspace), you
should do a define at the top of the file so we know there is a
non-standard value buried in there.
Thanks,
Mathieu
+ proc_dir = opendir(proc_dir_path);
+ /* maybe we should remove the empty dir in this pass too*/
+ if( proc_dir != NULL )
+ {
ret_size += sizeof(pid_t);
ret = (pid_t *) realloc(ret, ret_size);
++i;
--
1.7.0.4
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