diff options
Diffstat (limited to 'common/util.c')
| -rw-r--r-- | common/util.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/common/util.c b/common/util.c index 12cb7470..31a75a9b 100644 --- a/common/util.c +++ b/common/util.c @@ -70,7 +70,7 @@ int get_modifier_names(const char **names, uint32_t modifier_masks) { } pid_t get_parent_pid(pid_t child) { - pid_t parent; + pid_t parent = -1; char file_name[100]; char *buffer = NULL; char *token = NULL; @@ -79,15 +79,19 @@ pid_t get_parent_pid(pid_t child) { sprintf(file_name, "/proc/%d/stat", child); - if ((stat = fopen(file_name, "r")) && (buffer = read_line(stat))) { - fclose(stat); + if ((stat = fopen(file_name, "r"))) { + if ((buffer = read_line(stat))) { + token = strtok(buffer, sep); // pid + token = strtok(NULL, sep); // executable name + token = strtok(NULL, sep); // state + token = strtok(NULL, sep); // parent pid + parent = strtol(token, NULL, 10); + } - token = strtok(buffer, sep); // pid - token = strtok(NULL, sep); // executable name - token = strtok(NULL, sep); // state - token = strtok(NULL, sep); // parent pid + fclose(stat); + } - parent = strtol(token, NULL, 10); + if (parent) { return (parent == child) ? -1 : parent; } |