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Add virProcessGetPids to get all tasks of a process
This function gets all the PIDs listed in /proc/PID/task. This will be needed at least to move all qmeu-nbd tasks to the container cgroup.
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@ -1988,6 +1988,7 @@ virProcessAbort;
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virProcessExitWithStatus;
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virProcessGetAffinity;
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virProcessGetNamespaces;
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virProcessGetPids;
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virProcessGetStartTime;
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virProcessKill;
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virProcessKillPainfully;
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@ -600,6 +600,53 @@ virProcessGetAffinity(pid_t pid ATTRIBUTE_UNUSED)
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#endif /* HAVE_SCHED_GETAFFINITY */
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int virProcessGetPids(pid_t pid, size_t *npids, pid_t **pids)
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{
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int ret = -1;
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char *taskPath = NULL;
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DIR *dir = NULL;
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int value;
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struct dirent *ent;
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*npids = 0;
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*pids = NULL;
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if (virAsprintf(&taskPath, "/proc/%llu/task",
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(unsigned long long)pid) < 0)
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goto cleanup;
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if (!(dir = opendir(taskPath)))
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goto cleanup;
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while ((value = virDirRead(dir, &ent, taskPath)) > 0) {
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pid_t tmp_pid;
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/* Skip . and .. */
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if (STRPREFIX(ent->d_name, "."))
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continue;
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if (virStrToLong_i(ent->d_name, NULL, 10, &tmp_pid) < 0)
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goto cleanup;
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if (VIR_APPEND_ELEMENT(*pids, *npids, tmp_pid) < 0)
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goto cleanup;
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}
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if (value < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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if (!dir)
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closedir(dir);
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VIR_FREE(taskPath);
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if (ret < 0)
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VIR_FREE(*pids);
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return ret;
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}
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int virProcessGetNamespaces(pid_t pid,
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size_t *nfdlist,
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int **fdlist)
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@ -60,6 +60,8 @@ int virProcessSetAffinity(pid_t pid, virBitmapPtr map);
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virBitmapPtr virProcessGetAffinity(pid_t pid);
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int virProcessGetPids(pid_t pid, size_t *npids, pid_t **pids);
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int virProcessGetStartTime(pid_t pid,
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unsigned long long *timestamp);
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