/* * unistd.h - standard system calls */ /* $Id$ */ #ifndef _UNISTD_H #define _UNISTD_H #include #include /* Types */ typedef int pid_t; typedef int mode_t; typedef long suseconds_t; /* Time handling. */ struct timeval { time_t tv_sec; suseconds_t tv_usec; }; struct timezone { int tz_minuteswest; int tz_dsttime; }; /* obsolete, unused */ extern int gettimeofday(struct timeval* tv, struct timezone* tz); extern int settimeofday(const struct timeval* tv, const struct timezone* tz); /* File access. */ enum { O_ACCMODE = 0x3, O_RDONLY = 0, O_WRONLY = 1, O_RDWR = 2, O_CREAT = 0x40, O_TRUNC = 0x200, O_APPEND = 0x400 }; extern int open(const char* path, int access, ...); extern int creat(const char* path, mode_t mode); extern int close(int d); extern int read(int fd, void* buffer, size_t count); extern int write(int fd, void* buffer, size_t count); extern off_t lseek(int fildes, off_t offset, int whence); extern int fcntl(int fd, int op, ...); extern int unlink(const char* path); extern int remove(const char* path); /* Special variables */ extern char** environ; /* Implemented system calls */ extern void _exit(int); extern pid_t getpid(void); extern int brk(void* ptr); extern void* sbrk(intptr_t increment); extern int isatty(int d); /* Signal handling */ typedef int sig_atomic_t; #define SIG_ERR ((sighandler_t) -1) /* Error return. */ #define SIG_DFL ((sighandler_t) 0) /* Default action. */ #define SIG_IGN ((sighandler_t) 1) /* Ignore signal. */ #define SIGHUP 1 /* Hangup (POSIX). */ #define SIGINT 2 /* Interrupt (ANSI). */ #define SIGQUIT 3 /* Quit (POSIX). */ #define SIGILL 4 /* Illegal instruction (ANSI). */ #define SIGTRAP 5 /* Trace trap (POSIX). */ #define SIGABRT 6 /* Abort (ANSI). */ #define SIGIOT 6 /* IOT trap (4.2 BSD). */ #define SIGBUS 7 /* BUS error (4.2 BSD). */ #define SIGFPE 8 /* Floating-point exception (ANSI). */ #define SIGKILL 9 /* Kill, unblockable (POSIX). */ #define SIGUSR1 10 /* User-defined signal 1 (POSIX). */ #define SIGSEGV 11 /* Segmentation violation (ANSI). */ #define SIGUSR2 12 /* User-defined signal 2 (POSIX). */ #define SIGPIPE 13 /* Broken pipe (POSIX). */ #define SIGALRM 14 /* Alarm clock (POSIX). */ #define SIGTERM 15 /* Termination (ANSI). */ #define SIGSTKFLT 16 /* Stack fault. */ #define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */ #define SIGCHLD 17 /* Child status has changed (POSIX). */ #define SIGCONT 18 /* Continue (POSIX). */ #define SIGSTOP 19 /* Stop, unblockable (POSIX). */ #define SIGTSTP 20 /* Keyboard stop (POSIX). */ #define SIGTTIN 21 /* Background read from tty (POSIX). */ #define SIGTTOU 22 /* Background write to tty (POSIX). */ #define SIGURG 23 /* Urgent condition on socket (4.2 BSD). */ #define SIGXCPU 24 /* CPU limit exceeded (4.2 BSD). */ #define SIGXFSZ 25 /* File size limit exceeded (4.2 BSD). */ #define SIGVTALRM 26 /* Virtual alarm clock (4.2 BSD). */ #define SIGPROF 27 /* Profiling alarm clock (4.2 BSD). */ #define SIGWINCH 28 /* Window size change (4.3 BSD, Sun). */ #define SIGPOLL SIGIO /* Pollable event occurred (System V). */ #define SIGIO 29 /* I/O now possible (4.2 BSD). */ #define SIGPWR 30 /* Power failure restart (System V). */ #define SIGSYS 31 /* Bad system call. */ #define SIGUNUSED 31 #define _NSIG 32 /* Biggest signal number + 1 (not including real-time signals). */ typedef void (*sighandler_t)(int); extern sighandler_t signal(int signum, sighandler_t handler); extern int raise(int signum); #endif