tools_util.h provides signal_sssd function.

1 files changed, 93 insertions, 0 deletions

diff --git a/src/tools/tools_util.c b/src/tools/tools_util.c
index fbb1d81bd..049a4f581 100644
--- a/src/tools/tools_util.c
+++ b/src/tools/tools_util.c
@@ -578,3 +578,96 @@ done:
     talloc_free(conf_path);
     return ret;
 }
+
+static pid_t parse_pid(const char *strpid)
+{
+    long value;
+    char *endptr;
+
+    errno = 0;
+    value = strtol(strpid, &endptr, 10);
+    if ((errno != 0) || (endptr == strpid)
+        || ((*endptr != '\0') && (*endptr != '\n'))) {
+        return 0;
+    }
+
+    return value;
+}
+
+static errno_t get_sssd_pid(pid_t *out_pid)
+{
+    int ret;
+    size_t fsize;
+    FILE *pid_file = NULL;
+    char pid_str[MAX_PID_LENGTH] = {'\0'};
+
+    *out_pid = 0;
+
+    errno = 0;
+    pid_file = fopen(SSSD_PIDFILE, "r");
+    if (pid_file == NULL) {
+        ret = errno;
+        DEBUG(SSSDBG_MINOR_FAILURE, ("Unable to open pid file \"%s\": %s\n",
+              SSSD_PIDFILE, strerror(ret)));
+        goto done;
+    }
+
+    fsize = fread(pid_str, sizeof(char), MAX_PID_LENGTH * sizeof(char),
+                  pid_file);
+    if (!feof(pid_file)) {
+        /* eof not reached */
+        ret = ferror(pid_file);
+        if (ret != 0) {
+            DEBUG(SSSDBG_CRIT_FAILURE, ("Unable to read from file \"%s\": %s\n",
+                  SSSD_PIDFILE, strerror(ret)));
+        } else {
+            DEBUG(SSSDBG_CRIT_FAILURE, ("File \"%s\" contains invalid pid.\n",
+                  SSSD_PIDFILE));
+        }
+        goto done;
+    }
+    if (fsize == 0) {
+        DEBUG(SSSDBG_CRIT_FAILURE, ("File \"%s\" contains no pid.\n",
+              SSSD_PIDFILE));
+        ret = EINVAL;
+        goto done;
+    }
+
+    pid_str[MAX_PID_LENGTH-1] = '\0';
+    *out_pid = parse_pid(pid_str);
+    if (*out_pid == 0) {
+        DEBUG(SSSDBG_CRIT_FAILURE,
+              ("File \"%s\" contains invalid pid.\n", SSSD_PIDFILE));
+        ret = EINVAL;
+        goto done;
+    }
+
+    ret = EOK;
+
+done:
+    if (pid_file != NULL) {
+        fclose(pid_file);
+    }
+    return ret;
+}
+
+errno_t signal_sssd(int signum)
+{
+    int ret;
+    pid_t pid;
+
+    ret = get_sssd_pid(&pid);
+    if (ret != EOK) {
+        return ret;
+    }
+
+    if (kill(pid, signum) != 0) {
+        ret = errno;
+        DEBUG(SSSDBG_CRIT_FAILURE,
+              ("Could not send signal %d to process %d: %s\n",
+              signum, pid, strerror(errno)));
+        return ret;
+    }
+
+    return EOK;
+}