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dhcp: refactor nm_dhcp_client_stop_existing()

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This commit is contained in:
Thomas Haller
2016-04-22 11:04:57 +02:00
parent d061025f1e
commit cf0c300058
1 changed files with 30 additions and 32 deletions
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62
src/dhcp-manager/nm-dhcp-client.c
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@@ -597,51 +597,49 @@ nm_dhcp_client_start_ip6 (NMDhcpClient *self,
void
nm_dhcp_client_stop_existing (const char *pid_file, const char *binary_name)
{
char *pid_contents = NULL, *proc_contents = NULL, *proc_path = NULL;
long int tmp;
guint64 start_time;
pid_t pid, ppid;
const char *exe;
char proc_path[NM_STRLEN ("/proc/%lu/cmdline") + 100];
gs_free char *pid_contents = NULL, *proc_contents = NULL;
/* Check for an existing instance and stop it */
if (!g_file_get_contents (pid_file, &pid_contents, NULL, NULL))
return;
errno = 0;
tmp = strtol (pid_contents, NULL, 10);
if ((errno == 0) && (tmp > 1)) {
guint64 start_time;
const char *exe;
pid_t ppid;
pid = _nm_utils_ascii_str_to_int64 (pid_contents, 10, 1, G_MAXINT64, 0);
if (pid <= 0)
goto out;
/* Ensure the process is a DHCP client */
start_time = nm_utils_get_start_time_for_pid (tmp, NULL, &ppid);
proc_path = g_strdup_printf ("/proc/%ld/cmdline", tmp);
if ( start_time
&& g_file_get_contents (proc_path, &proc_contents, NULL, NULL)) {
exe = strrchr (proc_contents, '/');
if (exe)
exe++;
else
exe = proc_contents;
start_time = nm_utils_get_start_time_for_pid (pid, NULL, &ppid);
if (start_time == 0)
goto out;
if (!strcmp (exe, binary_name)) {
if (ppid == getpid ()) {
/* the process is our own child. */
nm_utils_kill_child_sync (tmp, SIGTERM, LOGD_DHCP, "dhcp-client", NULL, 1000 / 2, 1000 / 20);
} else {
nm_utils_kill_process_sync (tmp, start_time, SIGTERM, LOGD_DHCP,
"dhcp-client", 1000 / 2, 1000 / 20, 2000);
}
}
}
nm_sprintf_buf (proc_path, "/proc/%lu/cmdline", (long unsigned) pid);
if (!g_file_get_contents (proc_path, &proc_contents, NULL, NULL))
goto out;
exe = strrchr (proc_contents, '/');
if (exe)
exe++;
else
exe = proc_contents;
if (!nm_streq0 (exe, binary_name))
goto out;
if (ppid == getpid ()) {
/* the process is our own child. */
nm_utils_kill_child_sync (pid, SIGTERM, LOGD_DHCP, "dhcp-client", NULL, 1000 / 2, 1000 / 20);
} else {
nm_utils_kill_process_sync (pid, start_time, SIGTERM, LOGD_DHCP,
"dhcp-client", 1000 / 2, 1000 / 20, 2000);
}
out:
if (remove (pid_file) == -1) {
nm_log_dbg (LOGD_DHCP, "dhcp: could not remove pid file \"%s\": %d (%s)",
pid_file, errno, g_strerror (errno));
}
g_free (proc_path);
g_free (pid_contents);
g_free (proc_contents);
}
void