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kike: resolve the path to PID files better

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This commit is contained in:
Přemysl Eric Janouch 2015-07-02 01:02:06 +02:00
parent 51bf132c6b
commit b486965277
2 changed files with 63 additions and 15 deletions
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43
common.c
View File

@ -90,6 +90,49 @@ strncasecmp_ascii (const char *a, const char *b, size_t n)
return 0;
}
static char *
resolve_relative_runtime_filename (const char *filename)
{
struct str path;
str_init (&path);
const char *runtime_dir = getenv ("XDG_RUNTIME_DIR");
if (runtime_dir && *runtime_dir == '/')
str_append (&path, runtime_dir);
else
get_xdg_home_dir (&path, "XDG_DATA_HOME", ".local/share");
str_append_printf (&path, "/%s/%s", PROGRAM_NAME, filename);
// Try to create the file's ancestors
const char *last_slash = strrchr (path.str, '/');
if (last_slash && last_slash != path.str)
{
char *copy = xstrndup (path.str, last_slash - path.str);
(void) mkdir_with_parents (copy, NULL);
free (copy);
}
return str_steal (&path);
}
static char *
resolve_filename (const char *filename, char *(*relative_cb) (const char *))
{
// Absolute path is absolute
if (*filename == '/')
return xstrdup (filename);
// We don't want to use wordexp() for this as it may execute /bin/sh
if (*filename == '~')
{
// Paths to home directories ought to be absolute
char *expanded = try_expand_tilde (filename + 1);
if (expanded)
return expanded;
print_debug ("failed to expand the home directory in `%s'", filename);
}
return relative_cb (filename);
}
// --- Logging -----------------------------------------------------------------
static void

35
kike.c
View File

@ -31,15 +31,7 @@
static struct config_item g_config_table[] =
{
// TODO: use XDG_RUNTIME_DIR if relative. The last fallback is:
//
// "$XDG_DATA_HOME defines the base directory relative to which user
// specific data files should be stored. If $XDG_DATA_HOME is either not
// set or empty, a default equal to $HOME/.local/share should be used."
//
// Note that when using XDG_RUNTIME_DIR, it either needs to have access
// time bumped every 6 hours, or have the sticky bit set.
{ "pid_file", NULL, "Full path for the PID file" },
{ "pid_file", NULL, "Path or name of the PID file" },
{ "server_name", NULL, "Server name" },
{ "server_info", "My server", "Brief server description" },
{ "motd", NULL, "MOTD filename" },
@ -3671,14 +3663,12 @@ irc_initialize_server_name (struct server_context *ctx, struct error **e)
}
static bool
irc_lock_pid_file (struct server_context *ctx, struct error **e)
lock_pid_file (const char *path, struct error **e)
{
const char *path = str_map_find (&ctx->config, "pid_file");
if (!path)
return true;
// When using XDG_RUNTIME_DIR, the file needs to either have its
// access time bumped every 6 hours, or have the sticky bit set
int fd = open (path, O_RDWR | O_CREAT,
S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH /* 644 */);
S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH /* 644 */ | S_ISVTX /* sticky */);
if (fd < 0)
{
error_set (e, "can't open `%s': %s", path, strerror (errno));
@ -3695,6 +3685,7 @@ irc_lock_pid_file (struct server_context *ctx, struct error **e)
if (fcntl (fd, F_SETLK, &lock))
{
error_set (e, "can't lock `%s': %s", path, strerror (errno));
xclose (fd);
return false;
}
@ -3706,6 +3697,7 @@ irc_lock_pid_file (struct server_context *ctx, struct error **e)
|| write (fd, pid.str, pid.len) != (ssize_t) pid.len)
{
error_set (e, "can't write to `%s': %s", path, strerror (errno));
xclose (fd);
return false;
}
str_free (&pid);
@ -3715,6 +3707,19 @@ irc_lock_pid_file (struct server_context *ctx, struct error **e)
return true;
}
static bool
irc_lock_pid_file (struct server_context *ctx, struct error **e)
{
const char *path = str_map_find (&ctx->config, "pid_file");
if (!path)
return true;
char *resolved = resolve_filename (path, resolve_relative_runtime_filename);
bool result = lock_pid_file (resolved, e);
free (resolved);
return result;
}
static int
irc_listen (struct addrinfo *gai_iter)
{