1 /* SPDX-License-Identifier: LGPL-2.1 OR MIT */ 2 /* 3 * unistd function definitions for NOLIBC 4 * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu> 5 */ 6 7 /* make sure to include all global symbols */ 8 #include "nolibc.h" 9 10 #ifndef _NOLIBC_UNISTD_H 11 #define _NOLIBC_UNISTD_H 12 13 #include "std.h" 14 #include "arch.h" 15 #include "types.h" 16 #include "sys.h" 17 18 19 #define STDIN_FILENO 0 20 #define STDOUT_FILENO 1 21 #define STDERR_FILENO 2 22 23 #define F_OK 0 24 #define X_OK 1 25 #define W_OK 2 26 #define R_OK 4 27 28 /* 29 * int access(const char *path, int amode); 30 * int faccessat(int fd, const char *path, int amode, int flag); 31 */ 32 33 static __attribute__((unused)) 34 int sys_faccessat(int fd, const char *path, int amode, int flag) 35 { 36 return my_syscall4(__NR_faccessat, fd, path, amode, flag); 37 } 38 39 static __attribute__((unused)) 40 int faccessat(int fd, const char *path, int amode, int flag) 41 { 42 return __sysret(sys_faccessat(fd, path, amode, flag)); 43 } 44 45 static __attribute__((unused)) 46 int access(const char *path, int amode) 47 { 48 return faccessat(AT_FDCWD, path, amode, 0); 49 } 50 51 52 static __attribute__((unused)) 53 int msleep(unsigned int msecs) 54 { 55 struct timeval my_timeval = { msecs / 1000, (msecs % 1000) * 1000 }; 56 57 if (sys_select(0, 0, 0, 0, &my_timeval) < 0) 58 return (my_timeval.tv_sec * 1000) + 59 (my_timeval.tv_usec / 1000) + 60 !!(my_timeval.tv_usec % 1000); 61 else 62 return 0; 63 } 64 65 static __attribute__((unused)) 66 unsigned int sleep(unsigned int seconds) 67 { 68 struct timeval my_timeval = { seconds, 0 }; 69 70 if (sys_select(0, 0, 0, 0, &my_timeval) < 0) 71 return my_timeval.tv_sec + !!my_timeval.tv_usec; 72 else 73 return 0; 74 } 75 76 static __attribute__((unused)) 77 int usleep(unsigned int usecs) 78 { 79 struct timeval my_timeval = { usecs / 1000000, usecs % 1000000 }; 80 81 return sys_select(0, 0, 0, 0, &my_timeval); 82 } 83 84 static __attribute__((unused)) 85 int tcsetpgrp(int fd, pid_t pid) 86 { 87 return ioctl(fd, TIOCSPGRP, &pid); 88 } 89 90 #endif /* _NOLIBC_UNISTD_H */ 91