LibC: Implement simple posix_spawn{,p}

This does not support file_actions or attributes

userspace/libraries/LibC/CMakeLists.txt

@@ -34,6 +34,7 @@ set(LIBC_SOURCES
 	semaphore.cpp
 	setjmp.cpp
 	signal.cpp
+	spawn.cpp
 	stdio.cpp
 	stdlib.cpp
 	string.cpp

userspace/libraries/LibC/include/spawn.h

@@ -24,7 +24,7 @@ typedef int posix_spawn_file_actions_t;
 #define POSIX_SPAWN_SETSIGDEF		0x10
 #define POSIX_SPAWN_SETSIGMASK		0x20
 
-int posix_spawn(pid_t* __restrict pid, const char* __restrict path, const posix_spawn_file_actions_t* file_actions, const posix_spawnattr_t* __restrict attrp, char* const argv[__restrict], char* const envp[__restrict]);
+int posix_spawn(pid_t* __restrict pid, const char* __restrict path, const posix_spawn_file_actions_t* file_actions, const posix_spawnattr_t* __restrict attrp, char* const argv[], char* const envp[]);
 int posix_spawn_file_actions_addclose(posix_spawn_file_actions_t* file_actions, int fildes);
 int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t* file_actions, int fildes, int newfildes);
 int posix_spawn_file_actions_addopen(posix_spawn_file_actions_t* __restrict file_actions, int fildes, const char* __restrict path, int oflag, mode_t mode);
@@ -44,7 +44,7 @@ int posix_spawnattr_setschedparam(posix_spawnattr_t* __restrict attr, const stru
 int posix_spawnattr_setschedpolicy(posix_spawnattr_t* attr, int schedpolicy);
 int posix_spawnattr_setsigdefault(posix_spawnattr_t* __restrict attr, const sigset_t* __restrict sigdefault);
 int posix_spawnattr_setsigmask(posix_spawnattr_t* __restrict attr, const sigset_t* __restrict sigmask);
-int posix_spawnp(pid_t* __restrict pid, const char* __restrict file, const posix_spawn_file_actions_t* file_actions, const posix_spawnattr_t* __restrict attrp, char* const argc[__restrict], char* const envp[__restrict]);
+int posix_spawnp(pid_t* __restrict pid, const char* __restrict file, const posix_spawn_file_actions_t* file_actions, const posix_spawnattr_t* __restrict attrp, char* const argc[], char* const envp[]);
 
 __END_DECLS
 

userspace/libraries/LibC/spawn.cpp

@@ -0,0 +1,68 @@
+#include <BAN/Debug.h>
+
+#include <errno.h>
+#include <spawn.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#define TODO_FUNC(name, ...) int name(__VA_ARGS__) { dwarnln("TODO: " #name); errno = ENOTSUP; return -1; }
+
+static int do_posix_spawn(pid_t* __restrict pid, const char* __restrict path, const posix_spawn_file_actions_t* file_actions, const posix_spawnattr_t* __restrict attrp, char* const argv[], char* const envp[], bool do_path_resolution)
+{
+	if (file_actions != nullptr)
+	{
+		dwarnln("TODO: posix_spawn with file actions");
+		errno = ENOTSUP;
+		return -1;
+	}
+
+	if (attrp != nullptr)
+	{
+		dwarnln("TODO: posix_spawn with attributes");
+		errno = ENOTSUP;
+		return -1;
+	}
+
+	const pid_t child_pid = fork();
+	if (child_pid == 0)
+	{
+		auto* func = do_path_resolution ? execvpe : execve;
+		func(path, argv, envp);
+		exit(128 + errno);
+	}
+
+	if (pid != nullptr)
+		*pid = child_pid;
+
+	return 0;
+}
+
+int posix_spawn(pid_t* __restrict pid, const char* __restrict path, const posix_spawn_file_actions_t* file_actions, const posix_spawnattr_t* __restrict attrp, char* const argv[], char* const envp[])
+{
+	return do_posix_spawn(pid, path,file_actions, attrp, argv, envp, false);
+}
+
+int posix_spawnp(pid_t* __restrict pid, const char* __restrict path, const posix_spawn_file_actions_t* file_actions, const posix_spawnattr_t* __restrict attrp, char* const argv[], char* const envp[])
+{
+	return do_posix_spawn(pid, path,file_actions, attrp, argv, envp, true);
+}
+
+TODO_FUNC(posix_spawn_file_actions_addclose, posix_spawn_file_actions_t*, int)
+TODO_FUNC(posix_spawn_file_actions_adddup2, posix_spawn_file_actions_t*, int, int)
+TODO_FUNC(posix_spawn_file_actions_addopen, posix_spawn_file_actions_t* __restrict, int, const char* __restrict, int, mode_t)
+TODO_FUNC(posix_spawn_file_actions_destroy, posix_spawn_file_actions_t*)
+TODO_FUNC(posix_spawn_file_actions_init, posix_spawn_file_actions_t*)
+TODO_FUNC(posix_spawnattr_destroy, posix_spawnattr_t*)
+TODO_FUNC(posix_spawnattr_getflags, const posix_spawnattr_t* __restrict, short* __restrict)
+TODO_FUNC(posix_spawnattr_getpgroup, const posix_spawnattr_t* __restrict, pid_t* __restrict)
+TODO_FUNC(posix_spawnattr_getschedparam, const posix_spawnattr_t* __restrict, struct sched_param* __restrict)
+TODO_FUNC(posix_spawnattr_getschedpolicy, const posix_spawnattr_t* __restrict, int* __restrict)
+TODO_FUNC(posix_spawnattr_getsigdefault, const posix_spawnattr_t* __restrict, sigset_t* __restrict)
+TODO_FUNC(posix_spawnattr_getsigmask, const posix_spawnattr_t* __restrict, sigset_t* __restrict)
+TODO_FUNC(posix_spawnattr_init, posix_spawnattr_t*)
+TODO_FUNC(posix_spawnattr_setflags, posix_spawnattr_t*, short)
+TODO_FUNC(posix_spawnattr_setpgroup, posix_spawnattr_t*, pid_t)
+TODO_FUNC(posix_spawnattr_setschedparam, posix_spawnattr_t* __restrict, const struct sched_param* __restrict)
+TODO_FUNC(posix_spawnattr_setschedpolicy, posix_spawnattr_t*, int)
+TODO_FUNC(posix_spawnattr_setsigdefault, posix_spawnattr_t* __restrict, const sigset_t* __restrict)
+TODO_FUNC(posix_spawnattr_setsigmask, posix_spawnattr_t* __restrict, const sigset_t* __restrict)