49 lines
928 B
C
49 lines
928 B
C
#if !defined(lint) && defined(SCCSIDS)
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static char sccsid[] = "@(#)vfprintf.c 1.1 94/10/31 SMI"; /* from S5R2 1.1 */
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#endif
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/*LINTLIBRARY*/
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#include <stdio.h>
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#include <varargs.h>
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#include <errno.h>
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extern int _doprnt();
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/*VARARGS2*/
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int
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vfprintf(iop, format, ap)
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FILE *iop;
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char *format;
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va_list ap;
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{
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unsigned char localbuf[BUFSIZ];
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register int count;
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if (!(iop->_flag & _IOWRT)) {
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/* if no write flag */
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if (iop->_flag & _IORW) {
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/* if ok, cause read-write */
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iop->_flag |= _IOWRT;
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} else {
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/* else error */
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#ifdef POSIX
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errno = EBADF;
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#endif POSIX
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return EOF;
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}
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}
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if (iop->_flag & _IONBF) {
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iop->_flag &= ~_IONBF;
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iop->_ptr = iop->_base = localbuf;
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iop->_bufsiz = BUFSIZ;
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count = _doprnt(format, ap, iop);
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fflush(iop);
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iop->_flag |= _IONBF;
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iop->_base = NULL;
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iop->_bufsiz = 0;
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iop->_cnt = 0;
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} else
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count = _doprnt(format, ap, iop);
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return(ferror(iop)? EOF: count);
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}
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