sysdeps/lemon: pipe, fork, get(e)gid

sysdeps/lemon/generic/filesystem.cpp

@@ -348,5 +348,9 @@ namespace mlibc{
 
 		return 0;
 	}
+
+	int sys_pipe(int *fds, int flags){
+		return -syscall(SYS_PIPE, fds, flags);
+	}
 	#endif
 } 

sysdeps/lemon/generic/lemon.cpp

@@ -72,6 +72,10 @@ namespace mlibc{
 		pid_t pid = _pid;
 		return pid;
 	}
+
+	pid_t sys_getppid(){
+		return syscall(SYS_GETPPID);
+	}
 	
 	int sys_clock_get(int clock, time_t *secs, long *nanos) {
 		uint64_t _secs, _millis;
@@ -113,13 +117,11 @@ namespace mlibc{
 	}
 
 	gid_t sys_getgid(){
-		mlibc::infoLogger() << "mlibc: sys_getgid is a stub" << frg::endlog;
+		return syscall(SYS_GETGID);
-		return 0;
 	}
 
 	gid_t sys_getegid(){
-		mlibc::infoLogger() << "mlibc: sys_getegid is a stub" << frg::endlog;
+		return syscall(SYS_GETEGID);
-		return 0;
 	}
 
 	int sys_setgid(gid_t gid){
@@ -164,5 +166,20 @@ namespace mlibc{
 
 		return 0;
 	}
+
+	int sys_fork(pid_t *child){
+		long pid = syscall(SYS_FORK, 0);
+		if(pid < 0){
+			errno = pid;
+			return -1;
+		}
+
+		*child = pid;
+		return 0;
+	}
+
+	int sys_execve(const char *path, char *const argv[], char *const envp[]){
+		return -syscall(SYS_EXECVE, path, argv, envp);
+	}
 	#endif
 } 

sysdeps/lemon/include/lemon/syscall.h

@@ -13,6 +13,7 @@
 #define SYS_CREATE 8
 #define SYS_LINK 9
 #define SYS_UNLINK 10
+#define SYS_EXECVE 11
 #define SYS_CHDIR 12
 #define SYS_TIME 13
 #define SYS_MAP_FB 14
@@ -92,6 +93,11 @@
 #define SYS_INTERRUPT_THREAD 90
 #define SYS_LOAD_KERNEL_MODULE 91
 #define SYS_UNLOAD_KERNEL_MODULE 92
+#define SYS_FORK 93
+#define SYS_GETGID 94
+#define SYS_GETEGID 95
+#define SYS_GETPPID 96
+#define SYS_PIPE 97
 
 #ifdef __cplusplus
 extern "C"{