443 lines
9.2 KiB
C
443 lines
9.2 KiB
C
/*
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* The new sysinstall program.
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*
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* This is probably the last attempt in the `sysinstall' line, the next
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* generation being slated to essentially a complete rewrite.
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*
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* $Id: media_strategy.c,v 1.9 1995/05/21 19:51:50 gpalmer Exp $
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*
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* Copyright (c) 1995
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* Jordan Hubbard. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* verbatim and that no modifications are made prior to this
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* point in the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Jordan Hubbard
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* for the FreeBSD Project.
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* 4. The name of Jordan Hubbard or the FreeBSD project may not be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JORDAN HUBBARD ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL JORDAN HUBBARD OR HIS PETS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, LIFE OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <stdio.h>
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#include "sysinstall.h"
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#include <ctype.h>
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#include <sys/stat.h>
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#include <sys/errno.h>
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#include <sys/file.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <sys/param.h>
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#include <sys/dkbad.h>
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#include <sys/mman.h>
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#define MSDOSFS
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#define CD9660
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#define NFS
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#include <sys/mount.h>
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#undef MSDOSFS
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#undef CD9660
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#undef NFS
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#define MAX_ATTRIBS 20
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#define MAX_NAME 511
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#define MAX_VALUE 4095
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struct attribs {
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char *name;
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char *value;
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};
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static int lno;
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static int num_attribs;
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static int
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attr_parse(struct attribs **attr, char *file)
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{
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char hold_n[MAX_NAME+1];
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char hold_v[MAX_VALUE+1];
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int n, v, ch = 0;
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enum { LOOK, COMMENT, NAME, VALUE, COMMIT } state;
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FILE *fp;
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num_attribs = n = v = lno = 0;
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state = LOOK;
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if ((fp=fopen(file, "r")) == NULL)
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{
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msgConfirm("Cannot open the information file `%s': %s (%d)", file, strerror(errno), errno);
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return 0;
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}
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while (state == COMMIT || (ch = fgetc(fp)) != EOF) {
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/* Count lines */
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if (ch == '\n')
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++lno;
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switch(state) {
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case LOOK:
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if (isspace(ch))
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continue;
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/* Allow shell or lisp style comments */
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else if (ch == '#' || ch == ';') {
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state = COMMENT;
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continue;
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}
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else if (isalpha(ch)) {
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hold_n[n++] = ch;
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state = NAME;
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}
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else
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msgFatal("Invalid character '%c' at line %d\n", ch, lno);
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break;
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case COMMENT:
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if (ch == '\n')
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state = LOOK;
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break;
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case NAME:
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if (ch == '\n') {
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hold_n[n] = '\0';
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hold_v[v = 0] = '\0';
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state = COMMIT;
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}
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else if (isspace(ch))
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continue;
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else if (ch == '=') {
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hold_n[n] = '\0';
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state = VALUE;
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}
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else
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hold_n[n++] = ch;
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break;
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case VALUE:
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if (v == 0 && isspace(ch))
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continue;
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else if (ch == '{') {
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/* multiline value */
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while ((ch = fgetc(fp)) != '}') {
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if (ch == EOF)
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msgFatal("Unexpected EOF on line %d", lno);
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else {
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if (v == MAX_VALUE)
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msgFatal("Value length overflow at line %d", lno);
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hold_v[v++] = ch;
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}
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}
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hold_v[v] = '\0';
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state = COMMIT;
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}
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else if (ch == '\n') {
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hold_v[v] = '\0';
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state = COMMIT;
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}
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else {
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if (v == MAX_VALUE)
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msgFatal("Value length overflow at line %d", lno);
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else
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hold_v[v++] = ch;
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}
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break;
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case COMMIT:
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attr[num_attribs]->name = strdup(hold_n);
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attr[num_attribs++]->value = strdup(hold_v);
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state = LOOK;
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v = n = 0;
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break;
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default:
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msgFatal("Unknown state at line %d??\n", lno);
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}
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}
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return 1;
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}
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static const char *
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attr_match(struct attribs *attr, char *name)
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{
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int n = 0;
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while((strcmp(attr[n].name, name)!=0) && (n < num_attribs))
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n++;
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if (strcmp(attr[n].name, name))
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return((const char *) attr[n].value);
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return NULL;
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}
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static int
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genericGetDist(char *path, struct attribs *dist_attrib)
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{
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int fd;
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char buf[512];
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struct stat sb;
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int pfd[2], pid, numchunks;
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snprintf(buf, 512, "%s.tgz", path);
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if (stat(buf, &sb) == 0)
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{
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fd = open(buf, O_RDONLY, 0);
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return(fd);
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}
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snprintf(buf, 512, "%s.aa", path);
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if (stat(buf, &sb) != 0)
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{
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msgConfirm("Cannot find file(s) for distribution in ``%s''!\n", path);
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return 0;
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}
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numchunks = atoi(attr_match(dist_attrib, "pieces"));
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msgDebug("Attempting to extract distribution from %u files\n", numchunks);
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pipe(pfd);
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pid = fork();
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if (!pid)
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{
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caddr_t memory;
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int chunk = 0;
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dup2(pfd[1], 1); close(pfd[1]);
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close(pfd[0]);
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while (chunk < numchunks)
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{
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int fd;
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snprintf(buf, 512, "%s.%c%c", path, (chunk / 26), (chunk % 26));
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msgDebug("Opening %s\n", buf);
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if ((fd = open(buf, O_RDONLY)) == NULL)
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msgFatal("Cannot find file `%s'!\n", buf);
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fstat(fd, &sb);
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msgDebug("mmap()ing %s (%d)\n", buf, fd);
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memory = mmap(0, sb.st_size, PROT_READ, MAP_SHARED, fd, (off_t) 0);
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if (memory == (caddr_t) -1)
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msgFatal("mmap error: %s\n", strerror(errno));
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msgDebug("writing out mmap() space\n");
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write(1, memory, sb.st_size);
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msgDebug("munmapping %s\n", buf);
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munmap(memory, sb.st_size);
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msgDebug("closing %s\n", buf);
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close(fd);
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++chunk;
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}
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}
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close(pfd[1]);
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return(pfd[0]);
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}
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/* Various media "strategy" routines */
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Boolean
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mediaInitCDROM(Device *dev)
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{
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struct iso_args args;
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struct stat sb;
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if (Mkdir("/mnt", NULL))
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return FALSE;
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args.fspec = dev->devname;
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args.flags = 0;
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if (mount(MOUNT_CD9660, "/mnt", MNT_RDONLY, (caddr_t) &args) == -1)
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{
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msgConfirm("Error mounting %s on /mnt: %s (%u)\n",
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dev, strerror(errno), errno);
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return FALSE;
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}
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/* Do a very simple check to see if this looks roughly like a 2.0.5 CDROM
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Unfortunately FreeBSD won't let us read the ``label'' AFAIK, which is one
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sure way of telling the disc version :-( */
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if (stat("/mnt/dists", &sb))
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{
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if (errno == ENOENT)
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{
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msgConfirm("Couldn't locate the directory `dists' on the cdrom\n\
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Is this a 2.0.5 CDROM?\n");
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return FALSE;
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} else {
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msgConfirm("Couldn't stat directory %s: %s", "/mnt/dists", strerror(errno));
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return FALSE;
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}
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}
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return TRUE;
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}
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Boolean
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mediaGetCDROM(char *dist)
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{
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char buf[PATH_MAX];
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struct attribs *dist_attr;
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int retval;
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dist_attr = safe_malloc(sizeof(struct attribs) * MAX_ATTRIBS);
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snprintf(buf, PATH_MAX, "/stand/info/%s.inf", dist);
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if (attr_parse(&dist_attr, buf) == 0)
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{
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msgConfirm("Cannot load information file for distribution\n");
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return FALSE;
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}
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snprintf(buf, PATH_MAX, "/mnt/dists/%s", dist);
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retval = genericGetDist(buf, dist_attr);
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free(dist_attr);
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return retval;
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}
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void
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mediaCloseCDROM(Device *dev)
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{
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if (unmount("/mnt", 0) != 0)
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msgConfirm("Could not unmount the CDROM: %s\n", strerror(errno));
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return;
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}
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Boolean
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mediaInitFloppy(Device *dev)
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{
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if (Mkdir("/mnt", NULL))
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return FALSE;
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return TRUE;
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}
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Boolean
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mediaGetFloppy(char *dist)
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{
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char buf[PATH_MAX];
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struct attribs *dist_attr;
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int retval;
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dist_attr = safe_malloc(sizeof(struct attribs) * MAX_ATTRIBS);
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snprintf(buf, PATH_MAX, "/stand/info/%s.inf", dist);
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if (attr_parse(&dist_attr, buf) == 0)
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{
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msgConfirm("Cannot load information file for distribution\n");
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return FALSE;
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}
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snprintf(buf, PATH_MAX, "/mnt/%s", dist);
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retval = genericGetDist(buf, dist_attr);
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free(dist_attr);
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return retval;
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}
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void
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mediaCloseFloppy(Device *dev)
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{
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return;
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}
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Boolean
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mediaInitTape(Device *dev)
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{
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return TRUE;
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}
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Boolean
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mediaInitNetwork(Device *dev)
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{
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return TRUE;
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}
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Boolean
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mediaGetTape(char *dist)
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{
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return TRUE;
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}
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void
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mediaCloseTape(Device *dev)
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{
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return;
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}
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void
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mediaCloseNetwork(Device *dev)
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{
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return;
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}
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Boolean
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mediaInitFTP(Device *dev)
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{
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return TRUE;
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}
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Boolean
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mediaGetFTP(char *dist)
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{
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return TRUE;
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}
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void
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mediaCloseFTP(Device *dev)
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{
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}
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Boolean
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mediaInitUFS(Device *dev)
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{
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return TRUE;
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}
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Boolean
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mediaGetUFS(char *dist)
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{
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return TRUE;
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}
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/* UFS has no close routine since this is handled at the device level */
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Boolean
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mediaInitDOS(Device *dev)
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{
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return TRUE;
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}
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Boolean
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mediaGetDOS(char *dist)
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{
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return TRUE;
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}
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void
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mediaCloseDOS(Device *dev)
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{
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}
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