diff options
Diffstat (limited to 'lib/libufs')
| -rw-r--r-- | lib/libufs/Makefile | 12 | ||||
| -rw-r--r-- | lib/libufs/block.c | 95 | ||||
| -rw-r--r-- | lib/libufs/cgroup.c | 73 | ||||
| -rw-r--r-- | lib/libufs/inode.c | 95 | ||||
| -rw-r--r-- | lib/libufs/libufs.h | 137 | ||||
| -rw-r--r-- | lib/libufs/sblock.c | 119 | ||||
| -rw-r--r-- | lib/libufs/type.c | 204 |
7 files changed, 735 insertions, 0 deletions
diff --git a/lib/libufs/Makefile b/lib/libufs/Makefile new file mode 100644 index 0000000..64b0bca --- /dev/null +++ b/lib/libufs/Makefile @@ -0,0 +1,12 @@ +# $FreeBSD$ + +LIB= ufs +SRCS= block.c cgroup.c inode.c sblock.c type.c +INCS= libufs.h +CFLAGS+= -I${.CURDIR} -D_LIBUFS +.if defined(LIBUFS_DEBUG) +CFLAGS+= -D_LIBUFS_DEBUGGING +.endif +WARNS?= 2 + +.include <bsd.lib.mk> diff --git a/lib/libufs/block.c b/lib/libufs/block.c new file mode 100644 index 0000000..efc39ef --- /dev/null +++ b/lib/libufs/block.c @@ -0,0 +1,95 @@ +/* + * Copyright (c) 2002 Juli Mallett. All rights reserved. + * + * This software was written by Juli Mallett <jmallett@FreeBSD.org> for the + * FreeBSD project. Redistribution and use in source and binary forms, with + * or without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistribution of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistribution in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/mount.h> +#include <sys/disklabel.h> +#include <sys/stat.h> + +#include <ufs/ufs/ufsmount.h> +#include <ufs/ufs/dinode.h> +#include <ufs/ffs/fs.h> + +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +#include <libufs.h> + +ssize_t +bread(struct uufsd *disk, ufs2_daddr_t blockno, void *data, size_t size) +{ + char *buf; + ssize_t cnt; + + ERROR(disk, NULL); + + /* + * For when we need to work with the data as a buffer. + */ + buf = data; + + cnt = pread(disk->d_fd, data, size, (off_t)(blockno * disk->d_bsize)); + /* + * In case of failure, zero data, which must be fs_bsize. + */ + if (cnt != size) { + ERROR(disk, "short read from block device"); + for (cnt = 0; cnt < MIN(size, disk->d_fs.fs_bsize); cnt++) + buf[cnt] = 0; + return -1; + } + return cnt; +} + +ssize_t +bwrite(struct uufsd *disk, ufs2_daddr_t blockno, const void *data, size_t size) +{ + ssize_t cnt; + int rv; + + ERROR(disk, NULL); + + rv = ufs_disk_write(disk); + if (rv == -1) { + ERROR(disk, "failed to open disk for writing"); + return -1; + } + + cnt = pwrite(disk->d_fd, data, size, (off_t)(blockno * disk->d_bsize)); + if (cnt != size) { + ERROR(disk, "short write to block device"); + return -1; + } + + return cnt; +} diff --git a/lib/libufs/cgroup.c b/lib/libufs/cgroup.c new file mode 100644 index 0000000..a1d624d --- /dev/null +++ b/lib/libufs/cgroup.c @@ -0,0 +1,73 @@ +/* + * Copyright (c) 2003 Juli Mallett. All rights reserved. + * + * This software was written by Juli Mallett <jmallett@FreeBSD.org> for the + * FreeBSD project. Redistribution and use in source and binary forms, with + * or without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistribution of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistribution 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/mount.h> +#include <sys/disklabel.h> +#include <sys/stat.h> + +#include <ufs/ufs/ufsmount.h> +#include <ufs/ufs/dinode.h> +#include <ufs/ffs/fs.h> + +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +#include <libufs.h> + +int +cgread(struct uufsd *disk) +{ + return cgread1(disk, disk->d_ccg++); +} + +int +cgread1(struct uufsd *disk, int c) +{ + struct fs *fs; + off_t ccg; + + fs = &disk->d_fs; + + if (c >= fs->fs_ncg) { + return 0; + } + ccg = fsbtodb(fs, cgtod(fs, c)) * disk->d_bsize; + if (bread(disk, fsbtodb(fs, cgtod(fs, c)), disk->d_cgunion.d_buf, + fs->fs_bsize) == -1) { + ERROR(disk, "unable to read cylinder group"); + return -1; + } + disk->d_lcg = c; + return 1; +} diff --git a/lib/libufs/inode.c b/lib/libufs/inode.c new file mode 100644 index 0000000..bce5567 --- /dev/null +++ b/lib/libufs/inode.c @@ -0,0 +1,95 @@ +/* + * Copyright (c) 2002 Juli Mallett. All rights reserved. + * + * This software was written by Juli Mallett <jmallett@FreeBSD.org> for the + * FreeBSD project. Redistribution and use in source and binary forms, with + * or without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistribution of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistribution 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/mount.h> +#include <sys/disklabel.h> +#include <sys/stat.h> + +#include <ufs/ufs/ufsmount.h> +#include <ufs/ufs/dinode.h> +#include <ufs/ffs/fs.h> + +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <libufs.h> + +int +getino(struct uufsd *disk, void **dino, ino_t inode, int *mode) +{ + ino_t min, max; + caddr_t inoblock; + struct ufs1_dinode *dp1; + struct ufs2_dinode *dp2; + struct fs *fs; + + ERROR(disk, NULL); + + fs = &disk->d_fs; + inoblock = disk->d_inoblock; + min = disk->d_inomin; + max = disk->d_inomax; + + if (inoblock == NULL) { + inoblock = malloc(fs->fs_bsize); + if (inoblock == NULL) { + ERROR(disk, "unable to allocate inode block"); + return -1; + } + disk->d_inoblock = inoblock; + } + if (inode >= min && inode < max) + goto gotit; + bread(disk, fsbtodb(fs, ino_to_fsba(fs, inode)), inoblock, + fs->fs_bsize); + disk->d_inomin = min = inode - (inode & INOPB(fs)); + disk->d_inomax = max = min + INOPB(fs); +gotit: switch (disk->d_ufs) { + case 1: + dp1 = &((struct ufs1_dinode *)inoblock)[inode - min]; + *mode = dp1->di_mode & IFMT; + *dino = dp1; + return 0; + case 2: + dp2 = &((struct ufs2_dinode *)inoblock)[inode - min]; + *mode = dp2->di_mode & IFMT; + *dino = dp2; + return 0; + default: + break; + } + ERROR(disk, "unknown UFS filesystem type"); + return -1; +} diff --git a/lib/libufs/libufs.h b/lib/libufs/libufs.h new file mode 100644 index 0000000..035f2a5 --- /dev/null +++ b/lib/libufs/libufs.h @@ -0,0 +1,137 @@ +/* + * Copyright (c) 2002 Juli Mallett. All rights reserved. + * + * This software was written by Juli Mallett <jmallett@FreeBSD.org> for the + * FreeBSD project. Redistribution and use in source and binary forms, with + * or without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistribution of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistribution 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef __LIBUFS_H__ +#define __LIBUFS_H__ + +/* + * libufs macros (internal, non-exported). + */ +#ifdef _LIBUFS +#ifdef _LIBUFS_DEBUGGING +/* + * Trace steps through libufs, to be used at entry and erroneous return. + */ +#define ERROR(uufsd, str) \ +do { \ + fprintf(stderr, "libufs in %s", __func__); \ + if (str != NULL) \ + fprintf(stderr, ": %s", str); \ + if (errno) \ + fprintf(stderr, ": %s", strerror(errno)); \ + fprintf(stderr, "\n"); \ + if ((uufsd) != NULL) \ + (uufsd)->d_error = str; \ +} while (0) +#else /* _LIBUFS_DEBUGGING */ +#define ERROR(uufsd, str) \ +do { \ + if ((uufsd) != NULL) \ + (uufsd)->d_error = str; \ +} while (0) +#endif /* _LIBUFS_DEBUGGING */ +#endif /* _LIBUFS */ + +/* + * libufs structures. + */ + +/* + * userland ufs disk. + */ +struct uufsd { + const char *d_name; /* disk name */ + int d_ufs; /* decimal UFS version */ + int d_fd; /* raw device file descriptor */ + long d_bsize; /* device bsize */ + ufs2_daddr_t d_sblock; /* superblock location */ + caddr_t d_inoblock; /* inode block */ + ino_t d_inomin; /* low inode */ + ino_t d_inomax; /* high inode */ + union { + struct fs d_fs; /* filesystem information */ + char d_sb[MAXBSIZE]; + /* superblock as buffer */ + } d_sbunion; + union { + struct cg d_cg; /* cylinder group */ + char d_buf[MAXBSIZE]; + /* cylinder group storage */ + } d_cgunion; + int d_ccg; /* current cylinder group */ + int d_lcg; /* last cylinder group (in d_cg) */ + const char *d_error; /* human readable disk error */ + int d_mine; /* internal flags */ +#define d_fs d_sbunion.d_fs +#define d_sb d_sbunion.d_sb +#define d_cg d_cgunion.d_cg +}; + +__BEGIN_DECLS + +/* + * libufs prototypes. + */ + +/* + * block.c + */ +ssize_t bread(struct uufsd *, ufs2_daddr_t, void *, size_t); +ssize_t bwrite(struct uufsd *, ufs2_daddr_t, const void *, size_t); + +/* + * cgroup.c + */ +int cgread(struct uufsd *); +int cgread1(struct uufsd *, int); + +/* + * inode.c + */ +int getino(struct uufsd *, void **, ino_t, int *); + +/* + * sblock.c + */ +int sbread(struct uufsd *); +int sbwrite(struct uufsd *, int); + +/* + * type.c + */ +struct uufsd *ufs_disk_ctor(const char *); +int ufs_disk_close(struct uufsd *); +void ufs_disk_dtor(struct uufsd **); +int ufs_disk_fillout(struct uufsd *, const char *); +int ufs_disk_fillout_blank(struct uufsd *, const char *); +int ufs_disk_write(struct uufsd *); + +__END_DECLS + +#endif /* __LIBUFS_H__ */ diff --git a/lib/libufs/sblock.c b/lib/libufs/sblock.c new file mode 100644 index 0000000..455fee0 --- /dev/null +++ b/lib/libufs/sblock.c @@ -0,0 +1,119 @@ +/* + * Copyright (c) 2002 Juli Mallett. All rights reserved. + * + * This software was written by Juli Mallett <jmallett@FreeBSD.org> for the + * FreeBSD project. Redistribution and use in source and binary forms, with + * or without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistribution of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistribution 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/mount.h> +#include <sys/disklabel.h> +#include <sys/stat.h> + +#include <ufs/ufs/ufsmount.h> +#include <ufs/ufs/dinode.h> +#include <ufs/ffs/fs.h> + +#include <errno.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +#include <libufs.h> + +static int superblocks[] = SBLOCKSEARCH; + +int +sbread(struct uufsd *disk) +{ + struct fs *fs; + int sb, superblock; + + ERROR(disk, NULL); + + fs = &disk->d_fs; + superblock = superblocks[0]; + + for (sb = 0; (superblock = superblocks[sb]) != -1; sb++) { + if (bread(disk, superblock, disk->d_sb, SBLOCKSIZE) == -1) { + ERROR(disk, "non-existent or truncated superblock"); + return -1; + } + if (fs->fs_magic == FS_UFS1_MAGIC) + disk->d_ufs = 1; + if ((fs->fs_magic == FS_UFS2_MAGIC) && + (fs->fs_sblockloc == superblock)) + disk->d_ufs = 2; + if ((fs->fs_bsize <= MAXBSIZE) && + (fs->fs_bsize >= sizeof(*fs))) { + if (disk->d_ufs) + break; + } + disk->d_ufs = 0; + } + if (superblock == -1 || disk->d_ufs == 0) { + /* + * Other error cases will result in errno being set, here we + * must set it to indicate no superblock could be found with + * which to associate this disk/filesystem. + */ + ERROR(disk, "no usable known superblock found"); + errno = ENOENT; + return -1; + } + disk->d_bsize = fs->fs_fsize / fsbtodb(fs, 1); + disk->d_sblock = superblock / disk->d_bsize; + return 0; +} + +int +sbwrite(struct uufsd *disk, int all) +{ + struct fs *fs; + int i; + + ERROR(disk, NULL); + + fs = &disk->d_fs; + + if (!disk->d_sblock) { + disk->d_sblock = disk->d_fs.fs_sblockloc / disk->d_bsize; + } + + if (bwrite(disk, disk->d_sblock, fs, SBLOCKSIZE) == -1) { + ERROR(disk, "failed to write superblock"); + return -1; + } + if (all) { + for (i = 0; i < fs->fs_ncg; i++) + if (bwrite(disk, fsbtodb(fs, cgsblock(fs, i)), + fs, SBLOCKSIZE) == -1) { + ERROR(disk, "failed to update a superblock"); + return -1; + } + } + return 0; +} diff --git a/lib/libufs/type.c b/lib/libufs/type.c new file mode 100644 index 0000000..e5cb062 --- /dev/null +++ b/lib/libufs/type.c @@ -0,0 +1,204 @@ +/* + * Copyright (c) 2002 Juli Mallett. All rights reserved. + * + * This software was written by Juli Mallett <jmallett@FreeBSD.org> for the + * FreeBSD project. Redistribution and use in source and binary forms, with + * or without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistribution of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistribution 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/mount.h> +#include <sys/disklabel.h> +#include <sys/stat.h> + +#include <ufs/ufs/ufsmount.h> +#include <ufs/ufs/dinode.h> +#include <ufs/ffs/fs.h> + +#include <errno.h> +#include <fcntl.h> +#include <fstab.h> +#include <paths.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <libufs.h> + +/* Internally, track the 'name' value, it's ours. */ +#define MINE_NAME 0x01 +/* Track if its fd points to a writable device. */ +#define MINE_WRITE 0x02 + +struct uufsd * +ufs_disk_ctor(const char *name) +{ + struct uufsd *new; + + new = NULL; + + ERROR(new, NULL); + + new = malloc(sizeof(*new)); + if (new == NULL) { + ERROR(new, "unable to allocate memory for disk"); + return NULL; + } + + if (ufs_disk_fillout(new, name) == -1) { + ERROR(new, "could not fill out disk"); + free(new); + return NULL; + } + + return new; +} + +void +ufs_disk_dtor(struct uufsd **diskp) +{ + struct uufsd *disk; + + if (diskp != NULL) + disk = *diskp; + else + return; + + ERROR(disk, NULL); + + ufs_disk_close(disk); + free(disk); + *diskp = NULL; +} + +int +ufs_disk_close(struct uufsd *disk) +{ + ERROR(disk, NULL); + close(disk->d_fd); + if (disk->d_inoblock != NULL) { + free(disk->d_inoblock); + disk->d_inoblock = NULL; + } + if (disk->d_mine & MINE_NAME) { + free((char *)(uintptr_t)disk->d_name); + disk->d_name = NULL; + } + return 0; +} + +int +ufs_disk_fillout(struct uufsd *disk, const char *name) +{ + if (ufs_disk_fillout_blank(disk, name) == -1) { + return -1; + } + if (sbread(disk) == -1) { + ERROR(disk, "could not read superblock to fill out disk"); + return -1; + } + return 0; +} + +int +ufs_disk_fillout_blank(struct uufsd *disk, const char *name) +{ + struct stat st; + struct fstab *fs; + const char *oname; + char dev[MAXPATHLEN]; + int fd; + + ERROR(disk, NULL); + + oname = name; + fs = getfsfile(name); + if (fs != NULL) + name = fs->fs_spec; +again: if (stat(name, &st) < 0) { + if (*name != '/') { + if (*name == 'r') + name++; + snprintf(dev, sizeof(dev), "%s%s", _PATH_DEV, name); + name = dev; + goto again; + } + ERROR(disk, "could not find special device"); + return -1; + } + fd = open(name, O_RDONLY); + if (fd == -1) { + ERROR(disk, "could not open special device"); + return -1; + } + + disk->d_bsize = 1; + disk->d_ccg = 0; + disk->d_fd = fd; + disk->d_inoblock = NULL; + disk->d_inomin = 0; + disk->d_inomax = 0; + disk->d_lcg = 0; + disk->d_mine = 0; + disk->d_ufs = 0; + disk->d_error = NULL; + + if (oname != name) { + name = strdup(name); + if (name == NULL) { + ERROR(disk, "could not allocate memory for disk name"); + return -1; + } + disk->d_mine |= MINE_NAME; + } + disk->d_name = name; + + return 0; +} + +int +ufs_disk_write(struct uufsd *disk) +{ + int rofd; + + ERROR(disk, NULL); + + if (disk->d_mine & MINE_WRITE) + return 0; + + rofd = disk->d_fd; + + disk->d_fd = open(disk->d_name, O_RDWR); + if (disk->d_fd < 0) { + ERROR(disk, "failed to open disk for writing"); + disk->d_fd = rofd; + return -1; + } + + disk->d_mine |= MINE_WRITE; + + return 0; +} |
