36ab90385f
rather than the Linux way; various non-C bits of the ACK assume it takes an int, so it's cleaner).
123 lines
3.9 KiB
C
123 lines
3.9 KiB
C
/*
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* unistd.h - standard system calls
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*/
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/* $Id$ */
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#ifndef _UNISTD_H
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#define _UNISTD_H
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#include <stddef.h>
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#include <time.h>
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/* Types */
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typedef int pid_t;
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typedef int mode_t;
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typedef long suseconds_t;
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/* Time handling. */
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struct timeval
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{
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time_t tv_sec;
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suseconds_t tv_usec;
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};
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struct timezone
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{
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int tz_minuteswest;
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int tz_dsttime;
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}; /* obsolete, unused */
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extern int gettimeofday(struct timeval* tv, struct timezone* tz);
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extern int settimeofday(const struct timeval* tv, const struct timezone* tz);
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/* File access. */
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enum
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{
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O_ACCMODE = 0x3,
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O_RDONLY = 0,
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O_WRONLY = 1,
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O_RDWR = 2,
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O_CREAT = 0x10,
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O_TRUNC = 0x20,
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O_APPEND = 0x40
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};
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extern int open(const char* path, int access, ...);
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extern int creat(const char* path, mode_t mode);
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extern int close(int d);
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extern int read(int fd, void* buffer, size_t count);
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extern int write(int fd, void* buffer, size_t count);
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extern off_t lseek(int fildes, off_t offset, int whence);
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extern int fcntl(int fd, int op, ...);
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/* Special variables */
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extern char** environ;
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/* Implemented system calls */
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extern void _exit(int);
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extern pid_t getpid(void);
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extern int brk(void* ptr);
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extern void* sbrk(int increment);
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extern int isatty(int d);
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/* Signal handling */
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typedef int sig_atomic_t;
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#define SIG_ERR ((sighandler_t) -1) /* Error return. */
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#define SIG_DFL ((sighandler_t) 0) /* Default action. */
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#define SIG_IGN ((sighandler_t) 1) /* Ignore signal. */
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#define SIGHUP 1 /* Hangup (POSIX). */
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#define SIGINT 2 /* Interrupt (ANSI). */
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#define SIGQUIT 3 /* Quit (POSIX). */
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#define SIGILL 4 /* Illegal instruction (ANSI). */
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#define SIGTRAP 5 /* Trace trap (POSIX). */
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#define SIGABRT 6 /* Abort (ANSI). */
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#define SIGIOT 6 /* IOT trap (4.2 BSD). */
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#define SIGBUS 7 /* BUS error (4.2 BSD). */
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#define SIGFPE 8 /* Floating-point exception (ANSI). */
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#define SIGKILL 9 /* Kill, unblockable (POSIX). */
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#define SIGUSR1 10 /* User-defined signal 1 (POSIX). */
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#define SIGSEGV 11 /* Segmentation violation (ANSI). */
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#define SIGUSR2 12 /* User-defined signal 2 (POSIX). */
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#define SIGPIPE 13 /* Broken pipe (POSIX). */
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#define SIGALRM 14 /* Alarm clock (POSIX). */
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#define SIGTERM 15 /* Termination (ANSI). */
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#define SIGSTKFLT 16 /* Stack fault. */
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#define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */
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#define SIGCHLD 17 /* Child status has changed (POSIX). */
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#define SIGCONT 18 /* Continue (POSIX). */
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#define SIGSTOP 19 /* Stop, unblockable (POSIX). */
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#define SIGTSTP 20 /* Keyboard stop (POSIX). */
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#define SIGTTIN 21 /* Background read from tty (POSIX). */
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#define SIGTTOU 22 /* Background write to tty (POSIX). */
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#define SIGURG 23 /* Urgent condition on socket (4.2 BSD). */
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#define SIGXCPU 24 /* CPU limit exceeded (4.2 BSD). */
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#define SIGXFSZ 25 /* File size limit exceeded (4.2 BSD). */
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#define SIGVTALRM 26 /* Virtual alarm clock (4.2 BSD). */
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#define SIGPROF 27 /* Profiling alarm clock (4.2 BSD). */
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#define SIGWINCH 28 /* Window size change (4.3 BSD, Sun). */
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#define SIGPOLL SIGIO /* Pollable event occurred (System V). */
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#define SIGIO 29 /* I/O now possible (4.2 BSD). */
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#define SIGPWR 30 /* Power failure restart (System V). */
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#define SIGSYS 31 /* Bad system call. */
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#define SIGUNUSED 31
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#define _NSIG 32 /* Biggest signal number + 1
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(not including real-time signals). */
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typedef void (*sighandler_t)(int);
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extern sighandler_t signal(int signum, sighandler_t handler);
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extern int raise(int signum);
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#endif
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