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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.17.0/] [newlib/] [libc/] [stdio64/] [fdopen64.c] - Rev 262
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/* FUNCTION <<fdopen64>>---turn open file into a stream INDEX fdopen64 INDEX _fdopen64_r SYNOPSIS #include <stdio.h> FILE *fdopen64(int <[fd]>, const char *<[mode]>); FILE *_fdopen64_r(void *<[reent]>, int <[fd]>, const char *<[mode]>); DESCRIPTION <<fdopen64>> produces a file descriptor of type <<FILE *>>, from a descriptor for an already-open file (returned, for example, by the system subroutine <<open>> rather than by <<fopen>>). The <[mode]> argument has the same meanings as in <<fopen>>. RETURNS File pointer or <<NULL>>, as for <<fopen>>. */ #include <sys/types.h> #include <sys/fcntl.h> #include <stdio.h> #include <errno.h> #include "local.h" #include <_syslist.h> #include <sys/lock.h> extern int __sflags (); FILE * _DEFUN (_fdopen64_r, (ptr, fd, mode), struct _reent *ptr _AND int fd _AND _CONST char *mode) { register FILE *fp; int flags, oflags; #ifdef HAVE_FCNTL int fdflags, fdmode; #endif if ((flags = __sflags (ptr, mode, &oflags)) == 0) return 0; /* make sure the mode the user wants is a subset of the actual mode */ #ifdef HAVE_FCNTL if ((fdflags = _fcntl_r (ptr, fd, F_GETFL, 0)) < 0) return 0; fdmode = fdflags & O_ACCMODE; if (fdmode != O_RDWR && (fdmode != (oflags & O_ACCMODE))) { ptr->_errno = EBADF; return 0; } #endif if ((fp = __sfp (ptr)) == 0) return 0; _flockfile(fp); fp->_flags = flags; /* POSIX recommends setting the O_APPEND bit on fd to match append streams. Someone may later clear O_APPEND on fileno(fp), but the stream must still remain in append mode. Rely on __sflags setting __SAPP properly. */ #ifdef HAVE_FCNTL if ((oflags & O_APPEND) && !(fdflags & O_APPEND)) _fcntl_r (ptr, fd, F_SETFL, fdflags | O_APPEND); #endif fp->_file = fd; fp->_cookie = (_PTR) fp; #undef _read #undef _write #undef _seek #undef _close fp->_read = __sread; fp->_write = __swrite64; fp->_seek = __sseek; fp->_seek64 = __sseek64; fp->_close = __sclose; #ifdef __SCLE /* Explicit given mode results in explicit setting mode on fd */ if (oflags & O_BINARY) setmode(fp->_file, O_BINARY); else if (oflags & O_TEXT) setmode(fp->_file, O_TEXT); if (__stextmode(fp->_file)) fp->_flags |= __SCLE; #endif fp->_flags |= __SL64; _funlockfile(fp); return fp; } #ifndef _REENT_ONLY FILE * _DEFUN (fdopen64, (fd, mode), int fd _AND _CONST char *mode) { return _fdopen64_r (_REENT, fd, mode); } #endif
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