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[/] [or1k/] [branches/] [newlib/] [newlib/] [newlib/] [libc/] [reent/] [lseekr.c] - Rev 1768
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/* Reentrant versions of lseek 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 <<_lseek_r>>---Reentrant version of lseek INDEX _lseek_r ANSI_SYNOPSIS #include <reent.h> off_t _lseek_r(struct _reent *<[ptr]>, int <[fd]>, off_t <[pos]>, int <[whence]>); TRAD_SYNOPSIS #include <reent.h> off_t _lseek_r(<[ptr]>, <[fd]>, <[pos]>, <[whence]>) struct _reent *<[ptr]>; int <[fd]>; off_t <[pos]>; int <[whence]>; DESCRIPTION This is a reentrant version of <<lseek>>. It takes a pointer to the global data block, which holds <<errno>>. */ off_t _lseek_r (ptr, fd, pos, whence) struct _reent *ptr; int fd; off_t pos; int whence; { off_t ret; errno = 0; if ((ret = _lseek (fd, pos, whence)) == (off_t) -1 && errno != 0) ptr->_errno = errno; return ret; } #endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */
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