diff options
Diffstat (limited to 'posix/unistd.h')
| -rw-r--r-- | posix/unistd.h | 90 |
1 files changed, 69 insertions, 21 deletions
diff --git a/posix/unistd.h b/posix/unistd.h index f4a331bce3..9fcad90cb1 100644 --- a/posix/unistd.h +++ b/posix/unistd.h @@ -150,13 +150,36 @@ __BEGIN_DECLS #ifndef ssize_t typedef __ssize_t ssize_t; -#define ssize_t ssize_t +# define ssize_t ssize_t #endif #define __need_size_t #define __need_NULL #include <stddef.h> +#ifdef __USE_UNIX98 +/* The Single Unix specification says that some more types are + available here. */ +# ifndef gid_t +typedef __gid_t gid_t; +# define gid_t gid_t +# endif + +# ifndef uid_t +typedef __uid_t uid_t; +# define uid_t uid_t +# endif + +# ifndef off_t +typedef __off_t off_t; +# define off_t off_t +# endif + +# ifndef pid_t +typedef __pid_t pid_t; +# define pid_t pid_t +# endif +#endif /* Values for the second argument to access. These may be OR'd together. */ @@ -179,16 +202,16 @@ extern int euidaccess __P ((__const char *__name, int __type)); /* Values for the WHENCE argument to lseek. */ #ifndef _STDIO_H /* <stdio.h> has the same definitions. */ -#define SEEK_SET 0 /* Seek from beginning of file. */ -#define SEEK_CUR 1 /* Seek from current position. */ -#define SEEK_END 2 /* Seek from end of file. */ +# define SEEK_SET 0 /* Seek from beginning of file. */ +# define SEEK_CUR 1 /* Seek from current position. */ +# define SEEK_END 2 /* Seek from end of file. */ #endif #if defined __USE_BSD && !defined L_SET /* Old BSD names for the same constants; just for compatibility. */ -#define L_SET SEEK_SET -#define L_INCR SEEK_CUR -#define L_XTND SEEK_END +# define L_SET SEEK_SET +# define L_INCR SEEK_CUR +# define L_XTND SEEK_END #endif @@ -213,6 +236,19 @@ extern ssize_t read __P ((int __fd, __ptr_t __buf, size_t __nbytes)); extern ssize_t __write __P ((int __fd, __const __ptr_t __buf, size_t __n)); extern ssize_t write __P ((int __fd, __const __ptr_t __buf, size_t __n)); +#ifdef __USE_UNIX98 +/* Read NBYTES into BUF from FD at the given position OFFSET without + changing the file pointer. Return the number read, -1 for errors + or 0 for EOF. */ +extern ssize_t pread __P ((int __fd, __ptr_t __buf, size_t __nbytes, + __off_t __offset)); + +/* Write N bytes of BUF to FD at the given position OFFSET without + changing the file pointer. Return the number written, or -1. */ +extern ssize_t pwrite __P ((int __fd, __const __ptr_t __buf, size_t __n, + __off_t __offset)); +#endif + /* Create a one-way communication channel (pipe). If successful, two file descriptors are stored in PIPEDES; @@ -427,7 +463,7 @@ extern __pid_t __bsd_getpgrp __P ((__pid_t __pid)); #ifdef __FAVOR_BSD /* When we explicitely compile BSD sources use the BSD definition of this function. Please note that we cannot use parameters for the macro. */ -#define getpgrp __bsd_getpgrp +# define getpgrp __bsd_getpgrp #endif /* Set the process group ID of the process matching PID to PGID. @@ -777,8 +813,8 @@ extern int getdtablesize __P ((void)); extern int __brk __P ((__ptr_t __addr)); extern int brk __P ((__ptr_t __addr)); -#define __need_ptrdiff_t -#include <stddef.h> +# define __need_ptrdiff_t +# include <stddef.h> /* Increase or decrease the end of accessible data space by DELTA bytes. If successful, returns the address the previous end of data space @@ -814,10 +850,10 @@ extern long int syscall __P ((long int __sysno, ...)); LEN is always relative to the current file position. The CMD argument is one of the following. */ -#define F_ULOCK 0 /* Unlock a previously locked region. */ -#define F_LOCK 1 /* Lock a region for exclusive use. */ -#define F_TLOCK 2 /* Test and lock a region for exclusive use. */ -#define F_TEST 3 /* Test a region for other processes locks. */ +# define F_ULOCK 0 /* Unlock a previously locked region. */ +# define F_LOCK 1 /* Lock a region for exclusive use. */ +# define F_TLOCK 2 /* Test and lock a region for exclusive use. */ +# define F_TEST 3 /* Test a region for other processes locks. */ extern int lockf __P ((int __fd, int __cmd, __off_t __len)); #endif /* Use misc and F_LOCK not already defined. */ @@ -828,7 +864,7 @@ extern int lockf __P ((int __fd, int __cmd, __off_t __len)); /* Evaluate EXPRESSION, and repeat as long as it returns -1 with `errno' set to EINTR. */ -#define TEMP_FAILURE_RETRY(expression) \ +# define TEMP_FAILURE_RETRY(expression) \ (__extension__ \ ({ long int __result; \ do __result = (long int) (expression); \ @@ -836,15 +872,16 @@ extern int lockf __P ((int __fd, int __cmd, __off_t __len)); __result; })) \ -/* This variable is set nonzero at startup if the process's effective IDs - differ from its real IDs, or it is otherwise indicated that extra - security should be used. When this is set the dynamic linker ignores - the various environment variables that normally affect it. */ +/* This variable is set nonzero at startup if the process's effective + IDs differ from its real IDs, or it is otherwise indicated that + extra security should be used. When this is set the dynamic linker + and some functions contained in the C library ignore various + environment variables that normally affect them. */ extern int __libc_enable_secure; #endif -#ifdef __USE_POSIX199309 +#if defined __USE_POSIX199309 || defined __USE_UNIX98 /* Synchronize at least the data part of a file with the underlying media. */ extern int fdatasync __P ((int __fildes)); @@ -869,7 +906,18 @@ extern void encrypt __P ((char *__block, int __edflag)); FROM and copy the result to TO. The value of TO must not be in the range [FROM - N + 1, FROM - 1]. If N is odd the first byte in FROM is without partner. */ -extern void swab __P ((__const char *__from, char *__to, ssize_t __n)); +extern void swab __P ((__const __ptr_t __from, __ptr_t __to, ssize_t __n)); +#endif + + +/* The Single Unix specification, version 2, demands these prototypes + to be here. They are also found in <stdio.h>. */ +#ifdef __USE_UNIX98 +/* Return the name of the controlling terminal. */ +extern char *ctermid __P ((char *__s)); + +/* Return the name of the current user. */ +extern char *cuserid __P ((char *__s)); #endif __END_DECLS |