/* $NetBSD: chg_pid.c,v 1.9 2009/10/20 19:10:11 snj Exp $ */ /* * Copyright (c) 1995 L. Weppelman * 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. * * 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. */ /* * * This program changes the partition id field (p_id) in the GEM * partition info. NetBSD uses these id-fields to determine the kind * of partition. Sensible id's to set are: * NBU : NetBSD User partition * NBR : NetBSD Root partition * NBS : NetBSD Swap partition * NBD : General NetBSD partition * RAW : Partition hidden for GEMDOS * * When NetBSD auto boots, the first 'NBR' partition found when scanning the * SCSI-disks becomes the active root partition. The same goes for 'NBS'. * Drives are scanned in 'SCSI-id' order. */ #include #include #include #include #include #include #include "libtos.h" #ifndef Dmawrite #define Dmawrite DMAwrite #endif #ifndef Dmaread #define Dmaread DMAread #endif /* * Format of GEM root sector */ typedef struct gem_part { u_char p_flg; /* bit 0 is in-use flag */ char p_id[3]; /* id: GEM, BGM, XGM, UNX, MIX */ u_long p_st; /* block where partition starts */ u_long p_size; /* partition size */ } GEM_PART; /* * Defines for p_flg */ #define P_VALID 0x01 /* info is valid */ #define P_ACTIVE 0x80 /* partition is active */ #define NGEM_PARTS 4 /* Max. partition infos in root sector */ typedef struct gem_root { u_char fill[0x1c2]; /* Filler, can be boot code */ u_long hd_siz; /* size of entire volume */ GEM_PART parts[NGEM_PARTS]; /* see above */ u_long bsl_st; /* start of bad-sector list */ u_long bsl_cnt; /* nr. blocks in bad-sector list*/ u_short csum; /* checksum correction */ } GEM_ROOT; void help PROTO((void)); void usage PROTO((void)); int chg_tosparts PROTO((int, int, char *)); void change_it PROTO((int, GEM_PART *, char *)); int read_block PROTO((void *, int, int)); int write_block PROTO((void *, int, int)); void set_csum PROTO((char *)); const char version[] = "$Revision: 1.9 $"; char *Progname = NULL; /* What are we called */ int t_flag = 0; /* Test -- don't actually do it */ int v_flag = 0; /* show version */ int h_flag = 0; /* show help */ int main(int argc, char *argv[]) { /* * Option parsing */ extern int optind; extern char *optarg; int driveno = 0; int partno = 0; char *newname = NULL; int c; init_toslib(argv[0]); Progname = argv[0]; while ((c = getopt(argc, argv, "htVwo:")) != -1) { switch (c) { case 'h': h_flag = 1; break; case 'o': redirect_output(optarg); break; case 't': t_flag = 1; break; case 'V': v_flag = 1; break; case 'w': set_wait_for_key(); break; default: usage(); } } argc -= optind; argv += optind; if (h_flag) help(); if (v_flag) { eprintf("%s\r\n", version); if (argc != 3) xexit(0); } if (argc != 3) usage(); eprintf("Note: >>> Both drive and partition numbers start " "at 0! <<<\r\n"); driveno = atoi(argv[0]); partno = atoi(argv[1]); newname = argv[2]; eprintf("About to change id of partition %d on drive %d to %s\r\n", partno, driveno, newname); if (!t_flag) c = key_wait("Are you sure (y/n)? "); else c = 'y'; switch(c) { case 'y': case 'Y': if(chg_tosparts(partno, driveno, newname)) { if (!t_flag) eprintf("Done\r\n"); else eprintf("Not Done\r\n"); xexit(0); } else eprintf("Partition number not found\r\n"); break; default : eprintf("Aborted\r\n"); xexit(1); break; } xexit(0); } int chg_tosparts(chg_part, drive, newname) int chg_part, drive; char *newname; { GEM_ROOT *g_root; GEM_PART g_local[NGEM_PARTS]; char buf[512]; int pno = 0; int i; /* * Read root sector */ if (read_block(buf, 0, drive) == 0) fatal(-1, "Cannot read block 0\r\n"); /* * Make local copy of partition info, we may need to re-use * the buffer in case of 'XGM' partitions. */ g_root = (GEM_ROOT*)buf; memcpy(g_local, g_root->parts, NGEM_PARTS*sizeof(GEM_PART)); for (i = 0; i < NGEM_PARTS; i++) { if (!(g_local[i].p_flg & 1)) continue; if (!strncmp(g_local[i].p_id, "XGM", 3)) { int j; daddr_t new_root = g_local[i].p_st; /* * Loop through extended partition list */ for(;;) { if (read_block(buf, new_root, drive) == 0) fatal(-1, "Cannot read block %d\r\n", new_root); for (j = 0; j < NGEM_PARTS; j++) { if (!(g_root->parts[j].p_flg & 1)) continue; if (!strncmp(g_root->parts[j].p_id, "XGM", 3)) { new_root = g_local[i].p_st + g_root->parts[j].p_st; break; } else { if (pno == chg_part) { change_it(pno, &g_root->parts[j], newname); if (t_flag) return(1); if (write_block(buf, new_root, drive) == 0) fatal(-1, "Cannot write block %d\r\n",new_root); return(1); } pno++; } } if (j == NGEM_PARTS) break; } } else { if (pno == chg_part) { /* * Re-read block 0 */ if (read_block(buf, 0, drive) == 0) fatal(-1, "Cannot read block 0\r\n"); change_it(pno, &g_root->parts[i], newname); if (t_flag) return(1); set_csum(buf); if (write_block(buf, 0, drive) == 0) fatal(-1, "Cannot write block 0\r\n"); return(1); } pno++; } } return(0); } void change_it(pno, gp, newname) int pno; GEM_PART *gp; char *newname; { char s1[4], s2[4]; strncpy(s1, gp->p_id, 3); strncpy(s2, newname, 3); s1[3] = s2[3] = '\0'; eprintf("Changing partition %d: %s -> %s ...", pno, s1, s2); gp->p_id[0] = s2[0]; gp->p_id[1] = s2[1]; gp->p_id[2] = s2[2]; } int read_block(buf, blkno, drive) void *buf; int blkno; int drive; { if(Dmaread(blkno, 1, buf, drive + 8) != 0) return(0); return(1); } int write_block(buf, blkno, drive) void *buf; int blkno; int drive; { if(Dmawrite(blkno, 1, buf, drive + 8) != 0) return(0); return(1); } void set_csum(buf) char *buf; { unsigned short *p = (unsigned short *)buf; unsigned short csum = 0; int i; p[255] = 0; for(i = 0; i < 256; i++) csum += *p++; *--p = (0x1234 - csum) & 0xffff; } void usage(void) { eprintf("Usage: %s [-hVwt] [ -o ] " "\r\n", Progname); xexit(1); } void help(void) { eprintf("\r Change partition identifiers\r \r Usage: %s [-hVwt] [ -o ] \r \r Description of options:\r \r \t-h What you're getting right now.\r \t-o Write output to both and stdout.\r \t-V Print program version.\r \t-w Wait for a keypress before exiting.\r \t-t Test mode. It does everyting except the modifications on disk.\r \r The and arguments specify the drive and the partition\r this program acts on. Both are zero based.\r The argument specifies a 3 letter string that will become the new\r partition-id.\r Finally note that the actions of %s are reversable.\r ", Progname, Progname); xexit(0); }