101 lines
2.1 KiB
C
101 lines
2.1 KiB
C
/***
|
|
* File system path manipulation.
|
|
*
|
|
* @module path
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <errno.h>
|
|
#include <libgen.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include <lua.h>
|
|
#include <lauxlib.h>
|
|
|
|
#include "callisto.h"
|
|
#include "util.h"
|
|
|
|
/***
|
|
* Returns the last component of the given pathname,
|
|
* removing any trailing '/' characters. If the given
|
|
* path consists entirely of '/' characters, the string
|
|
* `"/"` is returned. If *path* is an empty string,
|
|
* the string `"."` is returned.
|
|
*
|
|
* This function may return nil if the given
|
|
* pathname exceeds the system's path length
|
|
* limit (on most Linux systems this will be 4096).
|
|
*
|
|
* @function basename
|
|
* @usage path.basename(arg[0])
|
|
* @tparam string path The path to process.
|
|
*/
|
|
static int
|
|
path_basename(lua_State *L)
|
|
{
|
|
const char *ret;
|
|
char *path; /* parameter 1 (string) */
|
|
|
|
path = strndup(luaL_checkstring(L, 1), lua_rawlen(L, 1));
|
|
ret = basename(path);
|
|
|
|
if (ret == NULL) /* failed? */
|
|
return lfail(L);
|
|
|
|
lua_pushstring(L, ret);
|
|
|
|
free(path);
|
|
return 1;
|
|
}
|
|
|
|
/***
|
|
* Returns the parent directory of the pathname
|
|
* given. Any trailing '/' characters are not
|
|
* counted as part of the directory name.
|
|
* If the given path is an empty string or contains
|
|
* no '/' characters, the string `"."` is returned,
|
|
* signifying the current directory.
|
|
*
|
|
* This function may return nil if the given
|
|
* pathname exceeds the system's path length
|
|
* limit (on most Linux systems this will be 4096).
|
|
*
|
|
* @function dirname
|
|
* @usage path.dirname(arg[0])
|
|
* @tparam string path The path to process.
|
|
*/
|
|
static int
|
|
path_dirname(lua_State *L)
|
|
{
|
|
const char *ret;
|
|
char *path; /* parameter 1 (string) */
|
|
|
|
path = strndup(luaL_checkstring(L, 1), lua_rawlen(L, 1));
|
|
ret = dirname(path);
|
|
|
|
if (ret == NULL) /* failed? */
|
|
return lfail(L);
|
|
|
|
lua_pushstring(L, ret);
|
|
|
|
free(path);
|
|
return 1;
|
|
}
|
|
|
|
static const luaL_Reg pathlib[] = {
|
|
{"basename", path_basename},
|
|
{"dirname", path_dirname},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
int
|
|
luaopen_path(lua_State *L)
|
|
{
|
|
luaL_newlib(L, pathlib);
|
|
return 1;
|
|
}
|