dynamically calculate tape block size unless specified on command line

[unix-history] / usr / src / sbin / restore / main.c

#ifndef lint
static char sccsid[] = "@(#)main.c      3.16    (Berkeley)      85/03/24";
#endif

/* Copyright (c) 1983 Regents of the University of California */

/*
*      Modified to recursively extract all files within a subtree
*      (supressed by the h option) and recreate the heirarchical
*      structure of that subtree and move extracted files to their
*      proper homes (supressed by the m option).
*      Includes the s (skip files) option for use with multiple
*      dumps on a single tape.
*      8/29/80         by Mike Litzkow
*
*      Modified to work on the new file system and to recover from
*      tape read errors.
*      1/19/82         by Kirk McKusick
*
*      Full incremental restore running entirely in user code and
*      interactive tape browser.
*      1/19/83         by Kirk McKusick
*/

#include "restore.h"
#include <dumprestor.h>
#include <signal.h>

int     bflag = 0, cvtflag = 0, dflag = 0, vflag = 0, yflag = 0;
int     hflag = 1, mflag = 1;
char    command = '\0';
long    dumpnum = 1;
long    volno = 0;
long    ntrec;
char    *dumpmap;
char    *clrimap;
ino_t   maxino;
time_t  dumptime;
time_t  dumpdate;
FILE    *terminal;

main(argc, argv)
       int argc;
       char *argv[];
{
       register char *cp;
       ino_t ino;
       char *inputdev = "/dev/rmt8";
       char *symtbl = "./restoresymtable";
       char name[MAXPATHLEN];
       int (*signal())();
       extern int onintr();

       if (signal(SIGINT, onintr) == SIG_IGN)
               (void) signal(SIGINT, SIG_IGN);
       if (signal(SIGTERM, onintr) == SIG_IGN)
               (void) signal(SIGTERM, SIG_IGN);
       setlinebuf(stderr);
       if (argc < 2) {
usage:
               fprintf(stderr, "Usage:\n%s%s%s%s%s",
                       "\trestore tfhsvy [file file ...]\n",
                       "\trestore xfhmsvy [file file ...]\n",
                       "\trestore ifhmsvy\n",
                       "\trestore rfsvy\n",
                       "\trestore Rfsvy\n");
               done(1);
       }
       argv++;
       argc -= 2;
       command = '\0';
       for (cp = *argv++; *cp; cp++) {
               switch (*cp) {
               case '-':
                       break;
               case 'c':
                       cvtflag++;
                       break;
               case 'd':
                       dflag++;
                       break;
               case 'h':
                       hflag = 0;
                       break;
               case 'm':
                       mflag = 0;
                       break;
               case 'v':
                       vflag++;
                       break;
               case 'y':
                       yflag++;
                       break;
               case 'f':
                       if (argc < 1) {
                               fprintf(stderr, "missing device specifier\n");
                               done(1);
                       }
                       inputdev = *argv++;
                       argc--;
                       break;
               case 'b':
                       /*
                        * change default tape blocksize
                        */
                       bflag++;
                       if (argc < 1) {
                               fprintf(stderr, "missing block size\n");
                               done(1);
                       }
                       ntrec = atoi(*argv++);
                       if (ntrec <= 0) {
                               fprintf(stderr, "Block size must be a positive integer\n");
                               done(1);
                       }
                       argc--;
                       break;
               case 's':
                       /*
                        * dumpnum (skip to) for multifile dump tapes
                        */
                       if (argc < 1) {
                               fprintf(stderr, "missing dump number\n");
                               done(1);
                       }
                       dumpnum = atoi(*argv++);
                       if (dumpnum <= 0) {
                               fprintf(stderr, "Dump number must be a positive integer\n");
                               done(1);
                       }
                       argc--;
                       break;
               case 't':
               case 'R':
               case 'r':
               case 'x':
               case 'i':
                       if (command != '\0') {
                               fprintf(stderr,
                                       "%c and %c are mutually exclusive\n",
                                       *cp, command);
                               goto usage;
                       }
                       command = *cp;
                       break;
               default:
                       fprintf(stderr, "Bad key character %c\n", *cp);
                       goto usage;
               }
       }
       if (command == '\0') {
               fprintf(stderr, "must specify i, t, r, R, or x\n");
               goto usage;
       }
       setinput(inputdev);
       if (argc == 0) {
               argc = 1;
               *--argv = ".";
       }
       switch (command) {
       /*
        * Interactive mode.
        */
       case 'i':
               setup();
               extractdirs(1);
               initsymtable((char *)0);
               runcmdshell();
               done(0);
       /*
        * Incremental restoration of a file system.
        */
       case 'r':
               setup();
               if (dumptime > 0) {
                       /*
                        * This is an incremental dump tape.
                        */
                       vprintf(stdout, "Begin incremental restore\n");
                       initsymtable(symtbl);
                       extractdirs(1);
                       removeoldleaves();
                       vprintf(stdout, "Calculate node updates.\n");
                       treescan(".", ROOTINO, nodeupdates);
                       findunreflinks();
                       removeoldnodes();
               } else {
                       /*
                        * This is a level zero dump tape.
                        */
                       vprintf(stdout, "Begin level 0 restore\n");
                       initsymtable((char *)0);
                       extractdirs(1);
                       vprintf(stdout, "Calculate extraction list.\n");
                       treescan(".", ROOTINO, nodeupdates);
               }
               createleaves(symtbl);
               createlinks();
               setdirmodes();
               checkrestore();
               if (dflag) {
                       vprintf(stdout, "Verify the directory structure\n");
                       treescan(".", ROOTINO, verifyfile);
               }
               dumpsymtable(symtbl, (long)1);
               done(0);
       /*
        * Resume an incremental file system restoration.
        */
       case 'R':
               initsymtable(symtbl);
               skipmaps();
               skipdirs();
               createleaves(symtbl);
               createlinks();
               setdirmodes();
               checkrestore();
               dumpsymtable(symtbl, (long)1);
               done(0);
       /*
        * List contents of tape.
        */
       case 't':
               setup();
               extractdirs(0);
               while (argc--) {
                       canon(*argv++, name);
                       ino = dirlookup(name);
                       if (ino == 0)
                               continue;
                       treescan(name, ino, listfile);
               }
               done(0);
       /*
        * Batch extraction of tape contents.
        */
       case 'x':
               setup();
               extractdirs(1);
               initsymtable((char *)0);
               while (argc--) {
                       canon(*argv++, name);
                       ino = dirlookup(name);
                       if (ino == 0)
                               continue;
                       if (mflag)
                               pathcheck(name);
                       treescan(name, ino, addfile);
               }
               createfiles();
               createlinks();
               setdirmodes();
               if (dflag)
                       checkrestore();
               done(0);
       }
}