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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.17.0/] [newlib/] [libc/] [stdio64/] [tmpfile64.c] - Blame information for rev 262

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1 148 jeremybenn
/*
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FUNCTION
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<<tmpfile64>>---create a large temporary file
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INDEX
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        tmpfile64
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INDEX
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        _tmpfile64_r
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ANSI_SYNOPSIS
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        #include <stdio.h>
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        FILE *tmpfile64(void);
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        FILE *_tmpfile64_r(void *<[reent]>);
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TRAD_SYNOPSIS
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        #include <stdio.h>
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        FILE *tmpfile64();
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        FILE *_tmpfile64_r(<[reent]>)
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        char *<[reent]>;
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DESCRIPTION
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Create a large temporary file (a file which will be deleted automatically),
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using a name generated by <<tmpnam>>.  The temporary file is opened with
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the mode <<"wb+">>, permitting you to read and write anywhere in it
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as a binary file (without any data transformations the host system may
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perform for text files).  The file may be larger than 2GB.
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The alternate function <<_tmpfile64_r>> is a reentrant version.  The
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argument <[reent]> is a pointer to a reentrancy structure.
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Both <<tmpfile64>> and <<_tmpfile64_r>> are only defined if __LARGE64_FILES
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is defined.
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RETURNS
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<<tmpfile64>> normally returns a pointer to the temporary file.  If no
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temporary file could be created, the result is NULL, and <<errno>>
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records the reason for failure.
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PORTABILITY
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<<tmpfile64>> is a glibc extension.
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Supporting OS subroutines required: <<close>>, <<fstat>>, <<getpid>>,
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<<isatty>>, <<lseek64>>, <<open64>>, <<read>>, <<sbrk>>, <<write>>.
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<<tmpfile64>> also requires the global pointer <<environ>>.
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*/
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#include <stdio.h>
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#include <reent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#ifndef O_BINARY
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# define O_BINARY 0
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#endif
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#ifdef __LARGE64_FILES
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FILE *
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_DEFUN (_tmpfile64_r, (ptr),
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        struct _reent *ptr)
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{
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  FILE *fp;
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  int e;
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  char *f;
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  char buf[L_tmpnam];
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  int fd;
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  do
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  {
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     if ((f = _tmpnam_r (ptr, buf)) == NULL)
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        return NULL;
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      fd = _open64_r (ptr, f, O_RDWR | O_CREAT | O_EXCL | O_BINARY,
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                      S_IRUSR | S_IWUSR);
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  }
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  while (fd < 0 && ptr->_errno == EEXIST);
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  if (fd < 0)
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    return NULL;
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  fp = _fdopen64_r (ptr, fd, "wb+");
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  e = ptr->_errno;
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  if (!fp)
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    _close_r (ptr, fd);
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  _CAST_VOID _remove_r (ptr, f);
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  ptr->_errno = e;
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  return fp;
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}
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#ifndef _REENT_ONLY
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FILE *
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_DEFUN_VOID (tmpfile64)
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{
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  return _tmpfile64_r (_REENT);
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}
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#endif
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#endif /* __LARGE64_FILES */

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