diff options
Diffstat (limited to 'usr/src/boot/lib/libstand/open.c')
| -rw-r--r-- | usr/src/boot/lib/libstand/open.c | 164 |
1 files changed, 81 insertions, 83 deletions
diff --git a/usr/src/boot/lib/libstand/open.c b/usr/src/boot/lib/libstand/open.c index 0d90433800..5fd6c2a5fb 100644 --- a/usr/src/boot/lib/libstand/open.c +++ b/usr/src/boot/lib/libstand/open.c @@ -1,6 +1,6 @@ /* $NetBSD: open.c,v 1.16 1997/01/28 09:41:03 pk Exp $ */ -/*- +/* * Copyright (c) 1993 * The Regents of the University of California. All rights reserved. * @@ -15,7 +15,7 @@ * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. - * 4. Neither the name of the University nor the names of its contributors + * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * @@ -32,36 +32,35 @@ * SUCH DAMAGE. * * @(#)open.c 8.1 (Berkeley) 6/11/93 - * + * * * Copyright (c) 1989, 1990, 1991 Carnegie Mellon University * All Rights Reserved. * * Author: Alessandro Forin - * + * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. - * + * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * + * * Carnegie Mellon requests users of this software to return to - * + * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 - * + * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ #include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); #include "stand.h" @@ -70,90 +69,89 @@ struct fs_ops *exclusive_file_system; struct open_file files[SOPEN_MAX]; static int -o_gethandle(void) +o_gethandle(void) { - int fd; - - for (fd = 0; fd < SOPEN_MAX; fd++) - if (files[fd].f_flags == 0) - return(fd); - return(-1); + int fd; + + for (fd = 0; fd < SOPEN_MAX; fd++) + if (files[fd].f_flags == 0) + return (fd); + return (-1); } static void o_rainit(struct open_file *f) { - f->f_rabuf = malloc(SOPEN_RASIZE); - f->f_ralen = 0; - f->f_raoffset = 0; + f->f_rabuf = malloc(SOPEN_RASIZE); + f->f_ralen = 0; + f->f_raoffset = 0; } int open(const char *fname, int mode) { - struct fs_ops *fs; - struct open_file *f; - int fd, i, error, besterror; - const char *file; - - if ((fd = o_gethandle()) == -1) { - errno = EMFILE; - return(-1); - } - - f = &files[fd]; - f->f_flags = mode + 1; - f->f_dev = (struct devsw *)0; - f->f_ops = (struct fs_ops *)0; - f->f_offset = 0; - f->f_devdata = NULL; - file = (char *)0; - - if (exclusive_file_system != NULL) { - fs = exclusive_file_system; - error = (fs->fo_open)(fname, f); - if (error == 0) - goto ok; - goto fail; - } - - error = devopen(f, fname, &file); - if (error || - (((f->f_flags & F_NODEV) == 0) && f->f_dev == (struct devsw *)0)) - goto err; - - /* see if we opened a raw device; otherwise, 'file' is the file name. */ - if (file == (char *)0 || *file == '\0') { - f->f_flags |= F_RAW; - f->f_rabuf = NULL; + struct fs_ops *fs; + struct open_file *f; + int fd, i, error, besterror; + const char *file; + + if ((fd = o_gethandle()) == -1) { + errno = EMFILE; + return (-1); + } + + f = &files[fd]; + f->f_flags = mode + 1; + f->f_dev = NULL; + f->f_ops = NULL; + f->f_offset = 0; + f->f_devdata = NULL; + file = NULL; + + if (exclusive_file_system != NULL) { + fs = exclusive_file_system; + error = (fs->fo_open)(fname, f); + if (error == 0) + goto ok; + goto err; + } + + error = devopen(f, fname, &file); + if (error || + (((f->f_flags & F_NODEV) == 0) && f->f_dev == NULL)) + goto err; + + /* see if we opened a raw device; otherwise, 'file' is the file name. */ + if (file == NULL || *file == '\0') { + f->f_flags |= F_RAW; + f->f_rabuf = NULL; + return (fd); + } + + /* pass file name to the different filesystem open routines */ + besterror = ENOENT; + for (i = 0; file_system[i] != NULL; i++) { + fs = file_system[i]; + error = (fs->fo_open)(file, f); + if (error == 0) + goto ok; + if (error != EINVAL) + besterror = error; + } + error = besterror; + + if ((f->f_flags & F_NODEV) == 0 && f->f_dev != NULL) + f->f_dev->dv_close(f); + if (error) + devclose(f); + +err: + f->f_flags = 0; + errno = error; + return (-1); + +ok: + f->f_ops = fs; + o_rainit(f); return (fd); - } - - /* pass file name to the different filesystem open routines */ - besterror = ENOENT; - for (i = 0; file_system[i] != NULL; i++) { - fs = file_system[i]; - error = (fs->fo_open)(file, f); - if (error == 0) - goto ok; - if (error != EINVAL) - besterror = error; - } - error = besterror; - - fail: - if ((f->f_flags & F_NODEV) == 0 && f->f_dev != NULL) - f->f_dev->dv_close(f); - if (error) - devclose(f); - - err: - f->f_flags = 0; - errno = error; - return (-1); - - ok: - f->f_ops = fs; - o_rainit(f); - return (fd); } |