diff options
author | luoqi <luoqi@FreeBSD.org> | 1999-01-20 01:22:39 +0000 |
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committer | luoqi <luoqi@FreeBSD.org> | 1999-01-20 01:22:39 +0000 |
commit | bfbf2fe72fa4e290fbb93a373a5d385c65be6ea5 (patch) | |
tree | 57befde5d3be7211240f31880562f543f6b1b5f8 | |
parent | b1b3d7c0bc86c238851d17d111c902846e0d3aad (diff) | |
download | FreeBSD-src-bfbf2fe72fa4e290fbb93a373a5d385c65be6ea5.zip FreeBSD-src-bfbf2fe72fa4e290fbb93a373a5d385c65be6ea5.tar.gz |
Allow tuning of read-only mounted file system.
Reviewed by: Bruce Evans <bde@zeta.org.au>
-rw-r--r-- | sbin/tunefs/tunefs.c | 51 |
1 files changed, 47 insertions, 4 deletions
diff --git a/sbin/tunefs/tunefs.c b/sbin/tunefs/tunefs.c index 682c6e2..8a32cb1 100644 --- a/sbin/tunefs/tunefs.c +++ b/sbin/tunefs/tunefs.c @@ -42,16 +42,18 @@ static const char copyright[] = static char sccsid[] = "@(#)tunefs.c 8.2 (Berkeley) 4/19/94"; #endif static const char rcsid[] = - "$Id$"; + "$Id: tunefs.c,v 1.6 1998/08/03 06:41:20 charnier Exp $"; #endif /* not lint */ /* * tunefs: change layout parameters to an existing file system. */ #include <sys/param.h> +#include <sys/mount.h> #include <sys/stat.h> #include <ufs/ffs/fs.h> +#include <ufs/ufs/ufsmount.h> #include <err.h> #include <fcntl.h> @@ -59,6 +61,7 @@ static const char rcsid[] = #include <paths.h> #include <stdio.h> #include <stdlib.h> +#include <string.h> #include <unistd.h> /* the optimization warning string template */ @@ -78,6 +81,7 @@ int bread(daddr_t, char *, int); void getsb(struct fs *, char *); void usage __P((void)); void printfs __P((void)); +char *rawname __P((char *, char *)); int main(argc, argv) @@ -87,17 +91,27 @@ main(argc, argv) char *cp, *special, *name, *action; struct stat st; int i; - int Aflag = 0; + int Aflag = 0, active = 0; struct fstab *fs; char *chg[2], device[MAXPATHLEN]; + struct ufs_args args; + struct statfs stfs; argc--, argv++; if (argc < 2) usage(); special = argv[argc - 1]; fs = getfsfile(special); - if (fs) - special = fs->fs_spec; + if (fs) { + if (statfs(special, &stfs) == 0) { + if ((stfs.f_flags & MNT_RDONLY) == 0) { + errx(1, "cannot work on read-write mounted file system"); + } + active = 1; + special = rawname(fs->fs_spec, device); + } else + special = fs->fs_spec; + } again: if (stat(special, &st) < 0) { if (*special != '/') { @@ -245,6 +259,13 @@ again: bwrite(fsbtodb(&sblock, cgsblock(&sblock, i)), (char *)&sblock, SBSIZE); close(fi); + if (active) { + bzero(&args, sizeof(args)); + if (mount("ufs", fs->fs_file, + stfs.f_flags | MNT_UPDATE | MNT_RELOAD, &args) < 0) + err(9, "%s: reload", special); + warnx("file system reloaded"); + } exit(0); } @@ -327,3 +348,25 @@ bread(bno, buf, cnt) } return (0); } + +char * +rawname(special, pathbuf) + char *special; + char *pathbuf; +{ + char *p; + int n; + + p = strrchr(special, '/'); + if (p) { + n = ++p - special; + bcopy(special, pathbuf, n); + } else { + strcpy(pathbuf, _PATH_DEV); + n = strlen(pathbuf); + p = special; + } + pathbuf[n++] = 'r'; + strcpy(pathbuf + n, p); + return pathbuf; +} |