feat(userspace/libc): implement functions for porting apps

Signed-off-by: EnderIce2 <enderice2@protonmail.com>

Userspace/libc/include/sys/select.h

@@ -0,0 +1,41 @@
+/*
+	This file is part of Fennix C Library.
+
+	Fennix C Library is free software: you can redistribute it and/or
+	modify it under the terms of the GNU General Public License as
+	published by the Free Software Foundation, either version 3 of
+	the License, or (at your option) any later version.
+
+	Fennix C Library is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with Fennix C Library. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#ifndef _SYS_SELECT_H
+#define _SYS_SELECT_H
+
+#include <sys/types.h>
+#include <signal.h>
+#include <time.h>
+#include <sys/time.h>
+
+#define FD_SETSIZE 1024
+
+typedef struct
+{
+	unsigned long fds_bits[(FD_SETSIZE + (8 * sizeof(unsigned long) - 1)) / (8 * sizeof(unsigned long))];
+} fd_set;
+
+#define FD_CLR(fd, fdset) ((fdset)->fds_bits[(fd) / (8 * sizeof(unsigned long))] &= ~(1UL << ((fd) % (8 * sizeof(unsigned long)))))
+#define FD_ISSET(fd, fdset) (((fdset)->fds_bits[(fd) / (8 * sizeof(unsigned long))] & (1UL << ((fd) % (8 * sizeof(unsigned long))))) != 0)
+#define FD_SET(fd, fdset) ((fdset)->fds_bits[(fd) / (8 * sizeof(unsigned long))] |= (1UL << ((fd) % (8 * sizeof(unsigned long)))))
+#define FD_ZERO(fdset) (memset((fdset), 0, sizeof(fd_set)))
+
+int select(int nfds, fd_set *restrict readfds, fd_set *restrict writefds, fd_set *restrict exceptfds, struct timeval *restrict timeout);
+int pselect(int nfds, fd_set *restrict readfds, fd_set *restrict writefds, fd_set *restrict exceptfds, const struct timespec *restrict timeout, const sigset_t *restrict sigmask);
+
+#endif // _SYS_SELECT_H

Userspace/libc/include/sys/time.h

@@ -0,0 +1,51 @@
+/*
+	This file is part of Fennix C Library.
+
+	Fennix C Library is free software: you can redistribute it and/or
+	modify it under the terms of the GNU General Public License as
+	published by the Free Software Foundation, either version 3 of
+	the License, or (at your option) any later version.
+
+	Fennix C Library is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with Fennix C Library. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#ifndef _SYS_TIME_H
+#define _SYS_TIME_H
+
+#include <bits/libc.h>
+#include <sys/types.h>
+#include <sys/select.h>
+
+typedef long time_t;
+typedef long suseconds_t;
+
+struct timeval
+{
+	time_t tv_sec;		 /* Seconds */
+	suseconds_t tv_usec; /* Microseconds */
+};
+
+struct itimerval
+{
+	struct timeval it_interval; /* Timer interval */
+	struct timeval it_value;	/* Current value */
+};
+
+/* Values for the which argument of getitimer() and setitimer() */
+#define ITIMER_REAL 0
+#define ITIMER_VIRTUAL 1
+#define ITIMER_PROF 2
+
+int getitimer(int which, struct itimerval *value);
+int gettimeofday(struct timeval *restrict tp, void *restrict tzp);
+// int select(int nfds, fd_set *restrict readfds, fd_set *restrict writefds, fd_set *restrict exceptfds, struct timeval *restrict timeout);
+int setitimer(int which, const struct itimerval *restrict new_value, struct itimerval *restrict old_value);
+int utimes(const char *filename, const struct timeval times[2]);
+
+#endif // _SYS_TIME_H

Userspace/libc/include/sys/un.h

@@ -0,0 +1,31 @@
+/*
+	This file is part of Fennix C Library.
+
+	Fennix C Library is free software: you can redistribute it and/or
+	modify it under the terms of the GNU General Public License as
+	published by the Free Software Foundation, either version 3 of
+	the License, or (at your option) any later version.
+
+	Fennix C Library is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with Fennix C Library. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#ifndef _SYS_UN_H
+#define _SYS_UN_H
+
+#include <sys/socket.h>
+
+#define SUN_PATH_SIZE 108
+
+struct sockaddr_un
+{
+	sa_family_t sun_family;		  /* Address family */
+	char sun_path[SUN_PATH_SIZE]; /* Socket pathname storage */
+};
+
+#endif // _SYS_UN_H