| /* Reentrant versions of write system call. */ |
| |
| #include <reent.h> |
| #include <unistd.h> |
| #include <_syslist.h> |
| |
| /* Some targets provides their own versions of this functions. Those |
| targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS. */ |
| |
| #ifdef _REENT_ONLY |
| #ifndef REENTRANT_SYSCALLS_PROVIDED |
| #define REENTRANT_SYSCALLS_PROVIDED |
| #endif |
| #endif |
| |
| #ifndef REENTRANT_SYSCALLS_PROVIDED |
| |
| /* We use the errno variable used by the system dependent layer. */ |
| #undef errno |
| extern int errno; |
| |
| /* |
| FUNCTION |
| <<_write_r>>---Reentrant version of write |
| |
| INDEX |
| _write_r |
| |
| ANSI_SYNOPSIS |
| #include <reent.h> |
| _ssize_t _write_r(struct _reent *<[ptr]>, |
| int <[fd]>, const void *<[buf]>, size_t <[cnt]>); |
| |
| TRAD_SYNOPSIS |
| #include <reent.h> |
| _ssize_t _write_r(<[ptr]>, <[fd]>, <[buf]>, <[cnt]>) |
| struct _reent *<[ptr]>; |
| int <[fd]>; |
| char *<[buf]>; |
| size_t <[cnt]>; |
| |
| DESCRIPTION |
| This is a reentrant version of <<write>>. It |
| takes a pointer to the global data block, which holds |
| <<errno>>. |
| */ |
| |
| _ssize_t |
| _DEFUN (_write_r, (ptr, fd, buf, cnt), |
| struct _reent *ptr _AND |
| int fd _AND |
| _CONST _PTR buf _AND |
| size_t cnt) |
| { |
| _ssize_t ret; |
| |
| errno = 0; |
| if ((ret = (_ssize_t)_write (fd, buf, cnt)) == -1 && errno != 0) |
| ptr->_errno = errno; |
| return ret; |
| } |
| |
| #endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */ |