94eacee1fc
if and only if a target directory is devfs. Previous patch doesn't correct, it's unconditionally avoid to create a device file if kernel knows devfs. PR: 31109
459 lines
10 KiB
C
459 lines
10 KiB
C
/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@login.dknet.dk> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <sys/param.h>
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#include <sys/disklabel.h>
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#include <sys/diskslice.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <sys/sysctl.h>
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#include <grp.h>
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#include <paths.h>
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#include <pwd.h>
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#include "libdisk.h"
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static void msgDebug(char *, ...) __printflike(1, 2);
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/* Clone these two from sysinstall because we need our own copies
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* due to link order problems with `crunch'. Feh!
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*/
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static int
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isDebug()
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{
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static int debug = 0; /* Allow debugger to tweak it */
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return debug;
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}
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/* Write something to the debugging port */
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static void
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msgDebug(char *fmt, ...)
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{
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va_list args;
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char *dbg;
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static int DebugFD = -1;
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if (DebugFD == -1)
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DebugFD = open(_PATH_DEV"ttyv1", O_RDWR);
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dbg = (char *)alloca(FILENAME_MAX);
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strcpy(dbg, "DEBUG: ");
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va_start(args, fmt);
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vsnprintf((char *)(dbg + strlen(dbg)), FILENAME_MAX, fmt, args);
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va_end(args);
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write(DebugFD, dbg, strlen(dbg));
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}
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int
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Fixup_FreeBSD_Names(struct disk *d, struct chunk *c)
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{
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struct chunk *c1, *c3;
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int j;
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if (!strcmp(c->name, "X")) return 0;
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/* reset all names to "X" */
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for (c1 = c->part; c1; c1 = c1->next) {
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c1->oname = c1->name;
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c1->name = malloc(12);
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if(!c1->name) return -1;
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strcpy(c1->name,"X");
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}
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/* Allocate the first swap-partition we find */
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for (c1 = c->part; c1; c1 = c1->next) {
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if (c1->type == unused) continue;
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if (c1->subtype != FS_SWAP) continue;
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sprintf(c1->name, "%s%c", c->name, SWAP_PART + 'a');
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break;
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}
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/* Allocate the first root-partition we find */
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for (c1 = c->part; c1; c1 = c1->next) {
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if (c1->type == unused) continue;
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if (!(c1->flags & CHUNK_IS_ROOT)) continue;
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sprintf(c1->name, "%s%c", c->name, 0 + 'a');
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break;
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}
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/* Try to give them the same as they had before */
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for (c1 = c->part; c1; c1 = c1->next) {
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if (strcmp(c1->name, "X")) continue;
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for(c3 = c->part; c3 ; c3 = c3->next)
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if (c1 != c3 && !strcmp(c3->name, c1->oname)) {
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goto newname;
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}
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strcpy(c1->name, c1->oname);
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newname: ;
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}
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/* Allocate the rest sequentially */
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for (c1 = c->part; c1; c1 = c1->next) {
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const char order[] = "efghabd";
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if (c1->type == unused) continue;
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if (strcmp("X", c1->name)) continue;
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for(j = 0; j < strlen(order); j++) {
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sprintf(c1->name, "%s%c", c->name, order[j]);
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for(c3 = c->part; c3 ; c3 = c3->next)
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if (c1 != c3 && !strcmp(c3->name, c1->name))
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goto match;
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break;
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match:
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strcpy(c1->name, "X");
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continue;
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}
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}
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for (c1 = c->part; c1; c1 = c1->next) {
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free(c1->oname);
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c1->oname = 0;
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}
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return 0;
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}
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int
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Fixup_Extended_Names(struct disk *d, struct chunk *c)
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{
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struct chunk *c1;
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int j=5;
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for (c1 = c->part; c1; c1 = c1->next) {
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if (c1->type == unused) continue;
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free(c1->name);
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c1->name = malloc(12);
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if(!c1->name) return -1;
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sprintf(c1->name, "%ss%d", d->chunks->name, j++);
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if (c1->type == freebsd)
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if (Fixup_FreeBSD_Names(d, c1) != 0)
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return -1;
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}
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return 0;
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}
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int
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Fixup_Names(struct disk *d)
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{
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struct chunk *c1, *c2;
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int i;
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#ifdef __i386__
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struct chunk *c3;
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int j;
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#endif
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c1 = d->chunks;
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for(i=1,c2 = c1->part; c2 ; c2 = c2->next) {
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c2->flags &= ~CHUNK_BSD_COMPAT;
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if (c2->type == unused)
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continue;
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if (strcmp(c2->name, "X"))
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continue;
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#ifdef __i386__
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c2->oname = malloc(12);
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if(!c2->oname) return -1;
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for(j = 1; j <= NDOSPART; j++) {
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sprintf(c2->oname, "%ss%d", c1->name, j);
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for(c3 = c1->part; c3; c3 = c3->next)
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if (c3 != c2 && !strcmp(c3->name, c2->oname))
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goto match;
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free(c2->name);
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c2->name = c2->oname;
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c2->oname = 0;
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break;
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match:
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continue;
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}
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if (c2->oname)
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free(c2->oname);
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#else
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free(c2->name);
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c2->name = strdup(c1->name);
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#endif /*__i386__*/
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}
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for(c2 = c1->part; c2; c2 = c2->next) {
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if (c2->type == freebsd) {
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c2->flags |= CHUNK_BSD_COMPAT;
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break;
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}
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}
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for(c2 = c1->part; c2; c2 = c2->next) {
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if (c2->type == freebsd)
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Fixup_FreeBSD_Names(d, c2);
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#ifndef PC98
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if (c2->type == extended)
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Fixup_Extended_Names(d, c2);
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#endif
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}
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return 0;
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}
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int
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#ifdef PC98
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Create_Chunk(struct disk *d, u_long offset, u_long size, chunk_e type, int subtype, u_long flags, const char *sname)
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#else
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Create_Chunk(struct disk *d, u_long offset, u_long size, chunk_e type, int subtype, u_long flags)
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#endif
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{
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int i;
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u_long l;
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if(!(flags & CHUNK_FORCE_ALL))
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{
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#ifdef PC98
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/* Never use the first cylinder */
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if (!offset) {
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offset += (d->bios_sect * d->bios_hd);
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size -= (d->bios_sect * d->bios_hd);
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}
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#else
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/* Never use the first track */
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if (!offset) {
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offset += d->bios_sect;
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size -= d->bios_sect;
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}
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#endif /* PC98 */
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/* Always end on cylinder boundary */
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l = (offset+size) % (d->bios_sect * d->bios_hd);
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size -= l;
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}
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#ifdef PC98
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i = Add_Chunk(d, offset, size, "X", type, subtype, flags, sname);
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#else
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i = Add_Chunk(d, offset, size, "X", type, subtype, flags);
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#endif
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Fixup_Names(d);
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return i;
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}
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struct chunk *
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Create_Chunk_DWIM(struct disk *d, struct chunk *parent , u_long size, chunk_e type, int subtype, u_long flags)
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{
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int i;
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struct chunk *c1;
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u_long offset;
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if (!parent)
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parent = d->chunks;
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for (c1=parent->part; c1; c1 = c1->next) {
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if (c1->type != unused) continue;
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if (c1->size < size) continue;
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offset = c1->offset;
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goto found;
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}
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return 0;
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found:
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#ifdef PC98
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i = Add_Chunk(d, offset, size, "X", type, subtype, flags, "-");
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#else
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i = Add_Chunk(d, offset, size, "X", type, subtype, flags);
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#endif
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if (i)
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return 0;
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Fixup_Names(d);
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for (c1=parent->part; c1; c1 = c1->next)
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if (c1->offset == offset)
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return c1;
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/* barfout(1, "Serious internal trouble"); */
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return 0;
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}
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int
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MakeDev(struct chunk *c1, const char *path)
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{
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char *p = c1->name;
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u_long cmaj, min, unit, part, slice;
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char buf[BUFSIZ], buf2[BUFSIZ];
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struct group *grp;
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struct passwd *pwd;
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struct statfs fs;
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uid_t owner;
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gid_t group;
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*buf2 = '\0';
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if (isDebug())
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msgDebug("MakeDev: Called with %s on path %s\n", p, path);
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if (!strcmp(p, "X"))
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return 0;
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if (statfs(path, &fs) != 0) {
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#ifdef DEBUG
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warn("statfs(%s) failed\n", path);
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#endif
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return 0;
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}
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if (strcmp(fs.f_fstypename, "devfs") == 0) {
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if (isDebug())
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msgDebug("MakeDev: No need to mknod(2) with DEVFS.\n");
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return 1;
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}
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if (!strncmp(p, "ad", 2))
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cmaj = 116, p += 2;
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#ifdef PC98
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else if (!strncmp(p, "wd", 2))
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cmaj = 3, p += 2;
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#endif
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else if (!strncmp(p, "wfd", 3))
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cmaj = 87, p += 3;
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else if (!strncmp(p, "afd", 3))
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cmaj = 118, p += 3;
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else if (!strncmp(p, "fla", 3))
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cmaj = 102, p += 3;
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else if (!strncmp(p, "idad", 4))
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cmaj = 109, p += 4;
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else if (!strncmp(p, "mlxd", 4))
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cmaj = 131, p += 4;
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else if (!strncmp(p, "amrd", 4))
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cmaj = 133, p += 4;
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else if (!strncmp(p, "twed", 4))
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cmaj = 147, p += 4;
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else if (!strncmp(p, "aacd", 4))
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cmaj = 151, p += 4;
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else if (!strncmp(p, "ar", 2)) /* ATA RAID */
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cmaj = 157, p += 2;
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else if (!strncmp(p, "da", 2)) /* CAM support */
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cmaj = 13, p += 2;
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else {
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msgDebug("MakeDev: Unknown major/minor for devtype %s\n", p);
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return 0;
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}
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if (!isdigit(*p)) {
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msgDebug("MakeDev: Invalid disk unit passed: %s\n", p);
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return 0;
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}
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unit = *p - '0';
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p++;
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if (!*p) {
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slice = 1;
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part = 2;
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goto done;
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}
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else if (isdigit(*p)) {
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unit *= 10;
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unit += (*p - '0');
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p++;
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}
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#ifndef __alpha__
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if (*p != 's') {
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msgDebug("MakeDev: `%s' is not a valid slice delimiter\n", p);
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return 0;
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}
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p++;
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if (!isdigit(*p)) {
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msgDebug("MakeDev: `%s' is an invalid slice number\n", p);
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return 0;
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}
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slice = *p - '0';
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p++;
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if (isdigit(*p)) {
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slice *= 10;
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slice += (*p - '0');
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p++;
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}
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slice = slice + 1;
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#else
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slice = 0;
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#endif
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if (!*p) {
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part = 2;
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if(c1->type == freebsd)
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sprintf(buf2, "%sc", c1->name);
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goto done;
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}
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if (*p < 'a' || *p > 'h') {
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msgDebug("MakeDev: `%s' is not a valid partition name.\n", p);
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return 0;
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}
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part = *p - 'a';
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done:
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if (isDebug())
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msgDebug("MakeDev: Unit %d, Slice %d, Part %d\n", unit, slice, part);
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if (unit > 32)
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return 0;
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if (slice > 32)
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return 0;
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if ((pwd = getpwnam("root")) == NULL) {
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if (isDebug())
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msgDebug("MakeDev: Unable to lookup user \"root\", using 0.\n");
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owner = 0;
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} else {
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owner = pwd->pw_uid;
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}
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if ((grp = getgrnam("operator")) == NULL) {
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if (isDebug())
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msgDebug("MakeDev: Unable to lookup group \"operator\", using 5.\n");
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group = 5;
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} else {
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group = grp->gr_gid;
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}
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min = unit * 8 + 65536 * slice + part;
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sprintf(buf, "%s/r%s", path, c1->name);
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unlink(buf);
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if (mknod(buf, S_IFCHR|0640, makedev(cmaj,min)) == -1) {
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msgDebug("mknod of %s returned failure status!\n", buf);
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return 0;
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}
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if (chown(buf, owner, group) == -1) {
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msgDebug("chown of %s returned failure status!\n", buf);
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return 0;
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}
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if (*buf2) {
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sprintf(buf, "%s/r%s", path, buf2);
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unlink(buf);
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if (mknod(buf, S_IFCHR|0640, makedev(cmaj,min)) == -1) {
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msgDebug("mknod of %s returned failure status!\n", buf);
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return 0;
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}
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if (chown(buf, owner, group) == -1) {
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msgDebug("chown of %s returned failure status!\n", buf);
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return 0;
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}
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}
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sprintf(buf, "%s/%s", path, c1->name);
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unlink(buf);
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if (mknod(buf, S_IFCHR|0640, makedev(cmaj,min)) == -1) {
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msgDebug("mknod of %s returned failure status!\n", buf);
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return 0;
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}
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if (chown(buf, owner, group) == -1) {
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msgDebug("chown of %s returned failure status!\n", buf);
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return 0;
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}
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return 1;
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}
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int
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MakeDevChunk(struct chunk *c1, const char *path)
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{
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int i;
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i = MakeDev(c1, path);
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if (c1->next)
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MakeDevChunk(c1->next, path);
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if (c1->part)
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MakeDevChunk(c1->part, path);
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return i;
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}
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int
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MakeDevDisk(struct disk *d, const char *path)
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{
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return MakeDevChunk(d->chunks, path);
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}
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