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 __nolibc_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 #if !defined(_sys_ftruncate64) && defined(__NR_ftruncate64) 52 static __attribute__((unused)) 53 int _sys_ftruncate64(int fd, uint32_t length0, uint32_t length1) 54 { 55 return __nolibc_syscall3(__NR_ftruncate64, fd, length0, length1); 56 } 57 #define _sys_ftruncate64 _sys_ftruncate64 58 #endif 59 60 static __attribute__((unused)) 61 int _sys_ftruncate(int fd, off_t length) 62 { 63 #if defined(_sys_ftruncate64) 64 return _sys_ftruncate64(fd, __NOLIBC_LLARGPART(length, 0), __NOLIBC_LLARGPART(length, 1)); 65 #else 66 return __nolibc_syscall2(__NR_ftruncate, fd, length); 67 #endif 68 } 69 70 static __attribute__((unused)) 71 int ftruncate(int fd, off_t length) 72 { 73 return __sysret(_sys_ftruncate(fd, length)); 74 } 75 76 static __attribute__((unused)) 77 int msleep(unsigned int msecs) 78 { 79 struct timeval my_timeval = { msecs / 1000, (msecs % 1000) * 1000 }; 80 81 if (_sys_select(0, NULL, NULL, NULL, &my_timeval) < 0) 82 return (my_timeval.tv_sec * 1000) + 83 (my_timeval.tv_usec / 1000) + 84 !!(my_timeval.tv_usec % 1000); 85 else 86 return 0; 87 } 88 89 static __attribute__((unused)) 90 unsigned int sleep(unsigned int seconds) 91 { 92 struct timeval my_timeval = { seconds, 0 }; 93 94 if (_sys_select(0, NULL, NULL, NULL, &my_timeval) < 0) 95 return my_timeval.tv_sec + !!my_timeval.tv_usec; 96 else 97 return 0; 98 } 99 100 static __attribute__((unused)) 101 int usleep(unsigned int usecs) 102 { 103 struct timeval my_timeval = { usecs / 1000000, usecs % 1000000 }; 104 105 return _sys_select(0, NULL, NULL, NULL, &my_timeval); 106 } 107 108 static __attribute__((unused)) 109 int tcsetpgrp(int fd, pid_t pid) 110 { 111 return ioctl(fd, TIOCSPGRP, &pid); 112 } 113 114 #endif /* _NOLIBC_UNISTD_H */ 115