meta: move photon/libc to root

libc/sys/linux/unistd.h

@@ -0,0 +1,30 @@
+#ifndef SYS_LINUX_UNISTD_H_
+#define SYS_LINUX_UNISTD_H_
+
+#include <stddef.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+struct stat;
+struct pollfd;
+
+typedef __intptr_t ssize_t;
+
+extern ssize_t read(int fd, void *buf, size_t count);
+extern ssize_t write(int fd, const void *buf, size_t count);
+extern int open(const char *pathname, int flags);
+extern int close(int fd);
+extern int stat(const char *pathname, struct stat *statbuf);
+extern int fstat(int fd, struct stat *statbuf);
+extern int lstat(const char *pathname, struct stat *statbuf);
+extern off_t lseek(int fd, off_t offset, int whence);
+extern void *mmap(void *addr, size_t length, int prot, int flags,
+        int fd, off_t offset);
+extern int mprotect(void *addr, size_t len, int prot);
+extern int munmap(void *addr, size_t length);
+extern int brk(void *addr);
+extern void *sbrk(intptr_t increment);
+extern int ioctl(int fd, unsigned long request, void *arg);
+extern void _exit(int code);
+
+#endif