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[mod_magnet] lighty.c.readlink() (fixes #3223) 

note: the result *is not* cached inside lighttpd

(*unlike* lighty.c.stat() which uses lighttpd internal stat_cache)

x-ref:
  "Add readlink to lighty.c.* library functions"
  https://redmine.lighttpd.net/issues/3223
This commit is contained in:
Glenn Strauss 2023-09-12 01:23:57 -04:00
parent eb0a2f9a7d
commit d7a9c86294
1 changed files with 19 additions and 0 deletions
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19
src/mod_magnet.c
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@ -22,6 +22,12 @@
#include "sock_addr.h"
#include "stat_cache.h"
#ifdef _WIN32
#include "fs_win32.h" /* readlink() */
#else
#include "sys-unistd.h" /* readlink() */
#endif
#include <dirent.h>
#include <stdlib.h>
#include <string.h>
@ -1580,6 +1586,18 @@ static int magnet_header_tokens(lua_State *L) {
return 1;
}
static int magnet_readlink(lua_State *L) {
const char * const path = luaL_checkstring(L, 1);
buffer * const b = magnet_tmpbuf_acquire(L);
ssize_t rd = readlink(path, b->ptr, buffer_string_space(b));
if (rd > 0 && rd < buffer_string_space(b))
lua_pushlstring(L, b->ptr, (size_t)rd);
else
lua_pushnil(L);
magnet_tmpbuf_release(b);
return 1;
}
static int magnet_reqhdr_get(lua_State *L) {
size_t klen;
const char * const k = luaL_checklstring(L, 2, &klen);
@ -3095,6 +3113,7 @@ magnet_init_lighty_table (lua_State * const L, request_st **rr,
,{ "cookie_tokens", magnet_cookie_tokens } /* parse cookie tokens */
,{ "header_tokens", magnet_header_tokens } /* parse header tokens seq */
,{ "readdir", magnet_readdir } /* dir walk */
,{ "readlink", magnet_readlink } /* symlink target */
,{ "quoteddec", magnet_quoteddec } /* quoted-string decode */
,{ "quotedenc", magnet_quotedenc } /* quoted-string encode */
,{ "bsdec", magnet_bsdec } /* backspace-escape decode */