diff options
Diffstat (limited to 'lib/libc/gen/disklabel.c')
| -rw-r--r-- | lib/libc/gen/disklabel.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/lib/libc/gen/disklabel.c b/lib/libc/gen/disklabel.c new file mode 100644 index 0000000..bd15a47 --- /dev/null +++ b/lib/libc/gen/disklabel.c @@ -0,0 +1,159 @@ +/* + * Copyright (c) 1983, 1987, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 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 + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 5/3/95"; +#endif /* LIBC_SCCS and not lint */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#define DKTYPENAMES +#define FSTYPENAMES +#include <sys/disklabel.h> + +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <ctype.h> + +static int +gettype(char *t, const char **names) +{ + const char **nm; + + for (nm = names; *nm; nm++) + if (strcasecmp(t, *nm) == 0) + return (nm - names); + if (isdigit((unsigned char)*t)) + return (atoi(t)); + return (0); +} + +struct disklabel * +getdiskbyname(const char *name) +{ + static struct disklabel disk; + struct disklabel *dp = &disk; + struct partition *pp; + char *buf; + char *db_array[2] = { _PATH_DISKTAB, 0 }; + char *cp, *cq; /* can't be register */ + char p, max, psize[3], pbsize[3], + pfsize[3], poffset[3], ptype[3]; + u_int32_t *dx; + + if (cgetent(&buf, db_array, (char *) name) < 0) + return NULL; + + bzero((char *)&disk, sizeof(disk)); + /* + * typename + */ + cq = dp->d_typename; + cp = buf; + while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 && + (*cq = *cp) && *cq != '|' && *cq != ':') + cq++, cp++; + *cq = '\0'; + + if (cgetstr(buf, "ty", &cq) > 0 && strcmp(cq, "removable") == 0) + dp->d_flags |= D_REMOVABLE; + else if (cq && strcmp(cq, "simulated") == 0) + dp->d_flags |= D_RAMDISK; + if (cgetcap(buf, "sf", ':') != NULL) + dp->d_flags |= D_BADSECT; + +#define getnumdflt(field, dname, dflt) \ + { long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; } + + getnumdflt(dp->d_secsize, "se", DEV_BSIZE); + getnumdflt(dp->d_ntracks, "nt", 0); + getnumdflt(dp->d_nsectors, "ns", 0); + getnumdflt(dp->d_ncylinders, "nc", 0); + + if (cgetstr(buf, "dt", &cq) > 0) + dp->d_type = gettype(cq, dktypenames); + else + getnumdflt(dp->d_type, "dt", 0); + getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks); + getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders); + getnumdflt(dp->d_rpm, "rm", 3600); + getnumdflt(dp->d_interleave, "il", 1); + getnumdflt(dp->d_trackskew, "sk", 0); + getnumdflt(dp->d_cylskew, "cs", 0); + getnumdflt(dp->d_headswitch, "hs", 0); + getnumdflt(dp->d_trkseek, "ts", 0); + getnumdflt(dp->d_bbsize, "bs", BBSIZE); + getnumdflt(dp->d_sbsize, "sb", 0); + strcpy(psize, "px"); + strcpy(pbsize, "bx"); + strcpy(pfsize, "fx"); + strcpy(poffset, "ox"); + strcpy(ptype, "tx"); + max = 'a' - 1; + pp = &dp->d_partitions[0]; + for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) { + long l; + psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p; + if (cgetnum(buf, psize, &l) == -1) + pp->p_size = 0; + else { + pp->p_size = l; + cgetnum(buf, poffset, &l); + pp->p_offset = l; + getnumdflt(pp->p_fsize, pfsize, 0); + if (pp->p_fsize) { + long bsize; + + if (cgetnum(buf, pbsize, &bsize) == 0) + pp->p_frag = bsize / pp->p_fsize; + else + pp->p_frag = 8; + } + getnumdflt(pp->p_fstype, ptype, 0); + if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0) + pp->p_fstype = gettype(cq, fstypenames); + max = p; + } + } + dp->d_npartitions = max + 1 - 'a'; + (void)strcpy(psize, "dx"); + dx = dp->d_drivedata; + for (p = '0'; p < '0' + NDDATA; p++, dx++) { + psize[1] = p; + getnumdflt(*dx, psize, 0); + } + dp->d_magic = DISKMAGIC; + dp->d_magic2 = DISKMAGIC; + free(buf); + return (dp); +} |
