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Diffstat (limited to 'src/lpm.c')
-rw-r--r--src/lpm.c129
1 files changed, 77 insertions, 52 deletions
diff --git a/src/lpm.c b/src/lpm.c
index f2e9799..eb17e3b 100644
--- a/src/lpm.c
+++ b/src/lpm.c
@@ -24,6 +24,7 @@
#include <fcntl.h>
#include <sys/stat.h>
+#include <sys/file.h>
#include <git2.h>
#include <mbedtls/sha256.h>
#include <mbedtls/x509.h>
@@ -98,38 +99,43 @@ int lpm_chmod(lua_State* L) {
return 0;
}
-/** BEGIN STOLEN LITE CODE **/
#if _WIN32
-static LPWSTR utfconv_utf8towc(const char *str) {
- LPWSTR output;
+static LPCWSTR lua_toutf16(lua_State* L, const char* str) {
+ if (str && str[0] == 0)
+ return L"";
int len = MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0);
- if (len == 0)
- return NULL;
- output = (LPWSTR) malloc(sizeof(WCHAR) * len);
- if (output == NULL)
- return NULL;
- len = MultiByteToWideChar(CP_UTF8, 0, str, -1, output, len);
- if (len == 0) {
- free(output);
- return NULL;
+ if (len > 0) {
+ LPWSTR output = (LPWSTR) malloc(sizeof(WCHAR) * len);
+ if (output) {
+ len = MultiByteToWideChar(CP_UTF8, 0, str, -1, output, len);
+ if (len > 0) {
+ lua_pushlstring(L, (char*)output, len * 2);
+ free(output);
+ return (LPCWSTR)lua_tostring(L, -1);
+ }
+ free(output);
+ }
}
- return output;
+ luaL_error(L, "can't convert utf8 string");
+ return NULL;
}
-static char *utfconv_wctoutf8(LPCWSTR str) {
- char *output;
+static const char* lua_toutf8(lua_State* L, LPCWSTR str) {
int len = WideCharToMultiByte(CP_UTF8, 0, str, -1, NULL, 0, NULL, NULL);
- if (len == 0)
- return NULL;
- output = (char *) malloc(sizeof(char) * len);
- if (output == NULL)
- return NULL;
- len = WideCharToMultiByte(CP_UTF8, 0, str, -1, output, len, NULL, NULL);
- if (len == 0) {
- free(output);
- return NULL;
+ if (len > 0) {
+ char* output = (char *) malloc(sizeof(char) * len);
+ if (output) {
+ len = WideCharToMultiByte(CP_UTF8, 0, str, -1, output, len, NULL, NULL);
+ if (len) {
+ lua_pushlstring(L, output, len);
+ free(output);
+ return lua_tostring(L, -1);
+ }
+ free(output);
+ }
}
- return output;
+ luaL_error(L, "can't convert utf16 string");
+ return NULL;
}
#endif
@@ -141,22 +147,16 @@ static int lpm_ls(lua_State *L) {
lua_pushstring(L, path[0] == 0 || strchr("\\/", path[strlen(path) - 1]) != NULL ? "*" : "\\*");
lua_concat(L, 2);
path = lua_tostring(L, -1);
-
- LPWSTR wpath = utfconv_utf8towc(path);
- if (wpath == NULL)
- return luaL_error(L, "can't ls %s: invalid utf8 character conversion", path);
WIN32_FIND_DATAW fd;
- HANDLE find_handle = FindFirstFileExW(wpath, FindExInfoBasic, &fd, FindExSearchNameMatch, NULL, 0);
- free(wpath);
+ HANDLE find_handle = FindFirstFileExW(lua_toutf16(L, path), FindExInfoBasic, &fd, FindExSearchNameMatch, NULL, 0);
if (find_handle == INVALID_HANDLE_VALUE)
return luaL_error(L, "can't ls %s: %d", path, GetLastError());
char mbpath[MAX_PATH * 4]; // utf-8 spans 4 bytes at most
int len, i = 1;
lua_newtable(L);
- do
- {
+ do {
if (wcscmp(fd.cFileName, L".") == 0) { continue; }
if (wcscmp(fd.cFileName, L"..") == 0) { continue; }
@@ -193,10 +193,7 @@ static int lpm_ls(lua_State *L) {
static int lpm_rmdir(lua_State *L) {
const char *path = luaL_checkstring(L, 1);
#ifdef _WIN32
- LPWSTR wpath = utfconv_utf8towc(path);
- int deleted = RemoveDirectoryW(wpath);
- free(wpath);
- if (!deleted)
+ if (!RemoveDirectoryW(lua_toutf16(L, path)))
return luaL_error(L, "can't rmdir %s: %d", path, GetLastError());
#else
if (remove(path))
@@ -208,11 +205,7 @@ static int lpm_rmdir(lua_State *L) {
static int lpm_mkdir(lua_State *L) {
const char *path = luaL_checkstring(L, 1);
#ifdef _WIN32
- LPWSTR wpath = utfconv_utf8towc(path);
- if (wpath == NULL)
- return luaL_error(L, "can't mkdir %s: invalid utf8 character conversion", path);
- int err = _wmkdir(wpath);
- free(wpath);
+ int err = _wmkdir(lua_toutf16(L, path));
#else
int err = mkdir(path, S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH);
#endif
@@ -223,29 +216,25 @@ static int lpm_mkdir(lua_State *L) {
static int lpm_stat(lua_State *L) {
const char *path = luaL_checkstring(L, 1);
- lua_newtable(L);
#ifdef _WIN32
#define realpath(x, y) _wfullpath(y, x, MAX_PATH)
struct _stat s;
- LPWSTR wpath = utfconv_utf8towc(path);
- if (wpath == NULL)
- return luaL_error(L, "can't stat %s: invalid utf8 character conversion", path);
+ LPCWSTR wpath = lua_toutf16(L, path);
int err = _wstat(wpath, &s);
- LPWSTR wfullpath = realpath(wpath, NULL);
- free(wpath);
+ LPCWSTR wfullpath = realpath(wpath, NULL);
if (!wfullpath) return 0;
- char *abs_path = utfconv_wctoutf8(wfullpath);
- free(wfullpath);
+ const char *abs_path = lua_toutf8(L, wfullpath);
#else
struct stat s;
int err = lstat(path, &s);
- char *abs_path = realpath(path, NULL);
+ const char *abs_path = realpath(path, NULL);
#endif
if (err || !abs_path) {
lua_pushnil(L);
lua_pushstring(L, strerror(errno));
return 2;
}
+ lua_newtable(L);
lua_pushstring(L, abs_path); lua_setfield(L, -2, "abs_path");
lua_pushvalue(L, 1); lua_setfield(L, -2, "path");
@@ -658,7 +647,7 @@ static int lpm_extract(lua_State* L) {
tar.close = gzip_close;*/
char buffer[8192];
int len = strlen(src);
- strncpy(actual_src, src, len - 3);
+ strncpy(actual_src, src, min(len - 3, PATH_MAX));
actual_src[len-3] = 0;
FILE* file = fopen(actual_src, "wb");
while (1) {
@@ -951,6 +940,41 @@ static int lpm_pwd(lua_State* L) {
return 1;
}
+int lpm_flock(lua_State* L) {
+ const char* path = luaL_checkstring(L, 1);
+ luaL_checktype(L, 2, LUA_TFUNCTION);
+ #ifdef _WIN32
+ HANDLE file = CreateFileW(lua_toutf16(L, path), FILE_SHARE_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
+ if (!file || file == INVALID_HANDLE_VALUE)
+ return luaL_error(L, "can't open for flock %s: %d", path, GetLastError());
+ OVERLAPPED overlapped = {0};
+ if (!LockFileEx(file, LOCKFILE_EXCLUSIVE_LOCK, 0, 0, 1, &overlapped)) {
+ CloseHandle(file);
+ return luaL_error(L, "can't flock %s: %d", path, GetLastError());
+ }
+ #else
+ int fd = open(path, 0);
+ if (fd == -1)
+ return luaL_error(L, "can't flock %s: %s", path, strerror(errno));
+ if (flock(fd, LOCK_EX) == -1) {
+ close(fd);
+ return luaL_error(L, "can't acquire exclusive lock on %s: %s", strerror(errno));
+ }
+ #endif
+ lua_pushvalue(L, 2);
+ lua_pushvalue(L, 1);
+ int err = lua_pcall(L, 1, 0, 0);
+ #ifdef _WIN32
+ UnlockFile(file, 0, 0, 1, 0);
+ CloseHandle(file);
+ #else
+ close(fd);
+ #endif
+ if (err)
+ return lua_error(L);
+ return 0;
+}
+
static const luaL_Reg system_lib[] = {
{ "ls", lpm_ls }, // Returns an array of files.
{ "stat", lpm_stat }, // Returns info about a single file.
@@ -969,6 +993,7 @@ static const luaL_Reg system_lib[] = {
{ "certs", lpm_certs }, // Sets the SSL certificate chain folder/file.
{ "chdir", lpm_chdir }, // Changes directory. Only use for --post actions.
{ "pwd", lpm_pwd }, // Gets existing directory. Only use for --post actions.
+ { "flock", lpm_flock }, // Locks a file.
{ NULL, NULL }
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 17:22:09 +0000