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util.pposix: Add pipe() (with support for pipe2() flags on Linux)

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This commit is contained in:
Matthew Wild 2024-11-16 12:26:55 +00:00
parent 7b8f6e3c3e
commit 6480651a93
1 changed files with 43 additions and 1 deletions
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44
util-src/pposix.c
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@ -13,7 +13,7 @@
* POSIX support functions for Lua
*/
#define MODULE_VERSION "0.4.0"
#define MODULE_VERSION "0.4.1"
#if defined(__linux__)
@ -654,6 +654,46 @@ static int lc_abort(lua_State *L) {
return 0;
}
const char *pipe_flag_names[] = {
"cloexec",
"direct",
"nonblock"
};
const int pipe_flag_values[] = {
O_CLOEXEC,
O_DIRECT,
O_NONBLOCK
};
static int lc_pipe(lua_State *L) {
int fds[2];
int nflags = lua_gettop(L);
#if defined(__linux__)
int flags=0;
for(int i = 1; i<=nflags; i++) {
int flag_index = luaL_checkoption(L, i, NULL, pipe_flag_names);
flags |= pipe_flag_values[flag_index];
}
if(pipe2(fds, flags) == -1) {
#else
if(nflags != 0) {
luaL_argerror(L, 1, "Flags are not supported on this platform");
}
if(pipe(fds) == -1) {
#endif
luaL_pushfail(L);
lua_pushstring(L, strerror(errno));
return 2;
}
lua_pushinteger(L, fds[0]);
lua_pushinteger(L, fds[1]);
return 2;
}
static int lc_uname(lua_State *L) {
struct utsname uname_info;
@ -870,6 +910,8 @@ int luaopen_prosody_util_pposix(lua_State *L) {
{ "mkdir", lc_mkdir },
{ "pipe", lc_pipe },
{ "setrlimit", lc_setrlimit },
{ "getrlimit", lc_getrlimit },