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Convert dumpfs(8) to libufs(3), rather than rolling local functions for a

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number of things.
This commit is contained in:
Juli Mallett 2002-07-11 21:44:03 +00:00
parent 261755738e
commit d67caa29ef
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=99826
2 changed files with 14 additions and 39 deletions
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1
sbin/dumpfs/Makefile
View File

@ -4,5 +4,6 @@
PROG= dumpfs
WARNS= 0
MAN= dumpfs.8
LDADD= -lufs
.include <bsd.prog.mk>

52
sbin/dumpfs/dumpfs.c
View File

@ -67,15 +67,12 @@ static const char rcsid[] =
#include <err.h>
#include <fcntl.h>
#include <fstab.h>
#include <libufs.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
union {
struct fs fs;
char pad[MAXBSIZE];
} fsun;
#define afs fsun.fs
#define afs disk.d_fs
union {
struct cg cg;
@ -83,12 +80,7 @@ union {
} cgun;
#define acg cgun.cg
long dev_bsize = 1;
/*
* Possible superblock locations ordered from most to least likely.
*/
static int sblock_try[] = SBLOCKSEARCH;
struct uufsd disk;
int dumpfs(const char *);
int dumpcg(const char *, int, int);
@ -127,28 +119,11 @@ dumpfs(const char *name)
ssize_t n;
time_t time;
int64_t fssize;
int fd, c, i, j, k, size;
int c, i, j, k, size;
if ((fd = open(name, O_RDONLY, 0)) < 0)
goto err;
for (i = 0; sblock_try[i] != -1; i++) {
if (lseek(fd, (off_t)sblock_try[i], SEEK_SET) == (off_t)-1)
if (ufs_disk_fillout(&disk, name) == -1)
goto err;
if ((n = read(fd, &afs, SBLOCKSIZE)) == -1)
goto err;
if ((afs.fs_magic == FS_UFS1_MAGIC ||
(afs.fs_magic == FS_UFS2_MAGIC &&
afs.fs_sblockloc == numfrags(&afs, sblock_try[i]))) &&
afs.fs_bsize <= MAXBSIZE &&
afs.fs_bsize >= sizeof(struct fs))
break;
}
if (sblock_try[i] == -1) {
fprintf(stderr, "Cannot find filesystem superblock\n");
return (1);
}
dev_bsize = afs.fs_fsize / fsbtodb(&afs, 1);
if (afs.fs_magic == FS_UFS2_MAGIC) {
fssize = afs.fs_size;
time = afs.fs_time;
@ -234,11 +209,11 @@ dumpfs(const char *name)
putchar('\n');
printf("\ncs[].cs_(nbfree,ndir,nifree,nffree):\n\t");
afs.fs_csp = calloc(1, afs.fs_cssize);
if (lseek(fd,
(off_t)(fsbtodb(&afs, afs.fs_csaddr)) * (off_t)dev_bsize,
if (lseek(disk.d_fd,
(off_t)(fsbtodb(&afs, afs.fs_csaddr)) * (off_t)disk.d_bsize,
SEEK_SET) == (off_t)-1)
goto err;
if (read(fd, (char *)afs.fs_csp, afs.fs_cssize) != afs.fs_cssize)
if (read(disk.d_fd, (char *)afs.fs_csp, afs.fs_cssize) != afs.fs_cssize)
goto err;
for (i = 0; i < afs.fs_ncg; i++) {
struct csum *cs = &afs.fs_cs(&afs, i);
@ -257,13 +232,12 @@ dumpfs(const char *name)
(fssize % afs.fs_fpg) / afs.fs_frag);
}
for (i = 0; i < afs.fs_ncg; i++)
if (dumpcg(name, fd, i))
if (dumpcg(name, disk.d_fd, i))
goto err;
(void)close(fd);
ufs_disk_close(&disk);
return (0);
err: if (fd != -1)
(void)close(fd);
err: ufs_disk_close(&disk);
warn("%s", name);
return (1);
};
@ -277,9 +251,9 @@ dumpcg(const char *name, int fd, int c)
printf("\ncg %d:\n", c);
if ((cur = lseek(fd, (off_t)(fsbtodb(&afs, cgtod(&afs, c))) *
(off_t)dev_bsize, SEEK_SET)) == (off_t)-1)
(off_t)disk.d_bsize, SEEK_SET)) == (off_t)-1)
return (1);
if (read(fd, &acg, afs.fs_bsize) != afs.fs_bsize) {
if (read(disk.d_fd, &acg, afs.fs_bsize) != afs.fs_bsize) {
warnx("%s: error reading cg", name);
return (1);
}