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Fix: handle sysconf possible negative returned value
[lttng-tools.git]
/
src
/
bin
/
lttng-sessiond
/
shm.c
diff --git
a/src/bin/lttng-sessiond/shm.c
b/src/bin/lttng-sessiond/shm.c
index 7bb52d4ee2feeb513d59079bf11813f319d8c48a..a5caa8bb6cdd3ab054872caedb86d362dd714d64 100644
(file)
--- a/
src/bin/lttng-sessiond/shm.c
+++ b/
src/bin/lttng-sessiond/shm.c
@@
-132,12
+132,20
@@
error:
*/
char *shm_ust_get_mmap(char *shm_path, int global)
{
*/
char *shm_ust_get_mmap(char *shm_path, int global)
{
- size_t mmap_size
= sysconf(_SC_PAGE_SIZE)
;
+ size_t mmap_size;
int wait_shm_fd, ret;
char *wait_shm_mmap;
int wait_shm_fd, ret;
char *wait_shm_mmap;
+ long sys_page_size;
assert(shm_path);
assert(shm_path);
+ sys_page_size = sysconf(_SC_PAGE_SIZE);
+ if (sys_page_size < 0) {
+ PERROR("sysconf PAGE_SIZE");
+ goto error;
+ }
+ mmap_size = sys_page_size;
+
wait_shm_fd = get_wait_shm(shm_path, mmap_size, global);
if (wait_shm_fd < 0) {
goto error;
wait_shm_fd = get_wait_shm(shm_path, mmap_size, global);
if (wait_shm_fd < 0) {
goto error;
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