Add build system scaffolding and libc headers

5 files changed, 128 insertions, 0 deletions

diff --git a/include/bits/in_addr.h b/include/bits/in_addr.h
new file mode 100644
index 00000000..1d7ac0af
--- /dev/null
+++ b/include/bits/in_addr.h
@@ -0,0 +1,14 @@
+#ifndef __BITS_IN_ADDR_H
+#define __BITS_IN_ADDR_H
+
+#ifndef __BITS_IN_ADDR_H_
+#error "Internal header — include the public API header instead."
+#endif
+
+typedef __UINT32_TYPE__ in_addr_t;
+
+struct in_addr {
+	in_addr_t s_addr;
+};
+
+#endif
diff --git a/include/bits/select.h b/include/bits/select.h
new file mode 100644
index 00000000..f1f952ab
--- /dev/null
+++ b/include/bits/select.h
@@ -0,0 +1,41 @@
+#ifndef __BITS_SELECT_H
+#define __BITS_SELECT_H
+
+#ifndef __BITS_SELECT_H_
+#error "Internal header — include the public API header instead."
+#endif
+
+#define FD_SETSIZE 1024
+
+#define FD_ZERO(set)                                                     \
+	do {                                                             \
+		for (size_t i = 0;                                       \
+		     i < sizeof((set)->fds_bits) / sizeof(fd_mask); i++) \
+			(set)->fds_bits[i] = 0;                          \
+	} while (0)
+
+#define FD_SET(fd, set)                                   \
+	((set)->fds_bits[(fd) / (8 * sizeof(fd_mask))] |= \
+	 (1UL << ((fd) % (8 * sizeof(fd_mask)))))
+
+#define FD_CLR(fd, set)                                   \
+	((set)->fds_bits[(fd) / (8 * sizeof(fd_mask))] &= \
+	 ~(1UL << ((fd) % (8 * sizeof(fd_mask)))))
+
+#define FD_ISSET(fd, set)                                 \
+	(((set)->fds_bits[(fd) / (8 * sizeof(fd_mask))] & \
+	  (1UL << ((fd) % (8 * sizeof(fd_mask))))) != 0)
+
+typedef __INT64_TYPE__ time_t;
+typedef __INT64_TYPE__ suseconds_t;
+
+typedef struct {
+	unsigned long fds_bits[1024 / (8 * sizeof(unsigned long))];
+} fd_set;
+
+struct timeval {
+	time_t tv_sec;
+	suseconds_t tv_usec;
+};
+
+#endif
diff --git a/include/bits/sigevent.h b/include/bits/sigevent.h
new file mode 100644
index 00000000..b36e676c
--- /dev/null
+++ b/include/bits/sigevent.h
@@ -0,0 +1,20 @@
+#ifndef __BITS_SIGEVENT_H
+#define __BITS_SIGEVENT_H
+
+#ifndef __BITS_SIGEVENT_H_
+#error "Internal header — include the public API header instead."
+#endif
+
+union sigval {
+	int sival_int;
+	void *sival_ptr;
+};
+
+struct sigevent {
+	int sigev_notify;
+	int sigev_signo;
+	union sigval sigev_value;
+	void (*sigev_notify_function)(union sigval);
+};
+
+#endif
diff --git a/include/bits/stat.h b/include/bits/stat.h
new file mode 100644
index 00000000..faa23771
--- /dev/null
+++ b/include/bits/stat.h
@@ -0,0 +1,38 @@
+#ifndef __BITS_STAT_H
+#define __BITS_STAT_H
+
+#ifndef __BITS_STAT_H_
+#error "Internal header — include the public API header instead."
+#endif
+
+#define __BITS_TIMESPEC_H_
+#include <bits/timespec.h>
+#undef __BITS_TIMESPEC_H_
+
+typedef __UINT64_TYPE__ dev_t;
+typedef __UINT64_TYPE__ ino_t;
+typedef __UINT32_TYPE__ mode_t;
+typedef __UINT32_TYPE__ nlink_t;
+typedef __UINT32_TYPE__ uid_t;
+typedef __UINT32_TYPE__ gid_t;
+typedef __INT64_TYPE__ off_t;
+typedef __INT32_TYPE__ blksize_t;
+typedef __INT64_TYPE__ blkcnt_t;
+
+struct stat {
+	dev_t st_dev;
+	ino_t st_ino;
+	mode_t st_mode;
+	nlink_t st_nlink;
+	uid_t st_uid;
+	gid_t st_gid;
+	dev_t st_rdev;
+	off_t st_size;
+	struct timespec st_atim;
+	struct timespec st_mtim;
+	struct timespec st_ctim;
+	blksize_t st_blksize;
+	blkcnt_t st_blocks;
+};
+
+#endif
diff --git a/include/bits/timespec.h b/include/bits/timespec.h
new file mode 100644
index 00000000..ebcacf76
--- /dev/null
+++ b/include/bits/timespec.h
@@ -0,0 +1,15 @@
+#ifndef __BITS_TIMESPEC_H
+#define __BITS_TIMESPEC_H
+
+#ifndef __BITS_TIMESPEC_H_
+#error "Never include <bits/timespec.h> directly; use <time.h> instead."
+#endif
+
+typedef __INT64_TYPE__ time_t;
+
+struct timespec {
+	time_t tv_sec;
+	long tv_nsec;
+};
+
+#endif