cvmod.c
上传用户:xiejiait
上传日期:2007-01-06
资源大小:881k
文件大小:2k
- /* @(#)cvmod.c 2.4 98/09/05 Copyright 1986, 1995 J. Schilling */
- /*
- * Copyright (c) 1986, 1995 J. Schilling
- */
- /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include <stdio.h>
- #include "io.h"
- #ifndef O_BINARY
- #define O_BINARY 0
- #endif
- int _cvmod(mode, omode, flag)
- const char *mode;
- int *omode;
- int *flag;
- {
- while (*mode){
- switch (*mode) {
-
- case 'r': *omode |= O_RDONLY; *flag |= FI_READ; break;
- case 'w': *omode |= O_WRONLY; *flag |= FI_WRITE; break;
- case 'e': *omode |= O_EXCL; break;
- case 'c': *omode |= O_CREAT; *flag |= FI_CREATE; break;
- case 't': *omode |= O_TRUNC; *flag |= FI_TRUNC; break;
- case 'a': *omode |= O_APPEND; *flag |= FI_APPEND; break;
- case 'u': *flag |= FI_UNBUF; break;
- /* dummy on UNIX */
- case 'b': *omode |= O_BINARY; *flag |= FI_BINARY; break;
- default: raisecond(_badmode, 0L);
- return 0;
- }
- mode++;
- }
- if (*flag & FI_READ && *flag & FI_WRITE) {
- *omode &= ~(O_RDONLY|O_WRONLY);
- *omode |= O_RDWR;
- }
- return 1;
- }