520 lines
11 KiB
C
520 lines
11 KiB
C
/*
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* dbz - use and test dbz in various ways
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*
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* -Log-
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <string.h>
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#include <dbz.h>
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#ifdef FUNNYSEEKS
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#include <unistd.h>
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#else
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#define SEEK_SET 0
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#endif
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#define STREQ(a, b) (*(a) == *(b) && strcmp((a), (b)) == 0)
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#ifndef lint
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static char RCSid[] = "$Header: /egcs/carton/cvsfiles/egcs/./libio/dbz/dbzmain.c,v 1.1 1997/08/21 22:58:23 jason Exp $";
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#endif
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char *progname;
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char *inname = "(no file)"; /* filename for messages etc. */
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long lineno; /* line number for messages etc. */
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char *my_basename;
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char *pagname;
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char *dir_name;
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char *str2dup();
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FILE *base;
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int op = 'b'; /* what to do, default build a new table */
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int baseinput = 1; /* is the base file also the input? */
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char *from = NULL; /* old table to use for dbzagain() */
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int omitzero = 0; /* omit lines tagged with 0 */
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long every = 0; /* report every n lines */
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int syncs = 0; /* dbzsync() on each report */
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int quick = 0; /* quick checking, not too thorough */
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int sweep = 0; /* sweep file checking all offsets */
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int useincore = 1; /* should we use incore facility? */
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long xxx = 0; /* debugging variable */
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int printx = 0; /* print xxx after all is done */
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int unique = 1; /* before store(), check with fetch() */
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int usefresh = 0; /* use dbzfresh? */
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long siz = 0; /* -p size */
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char map = 'C'; /* -p map */
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long tag = 0; /* -p tag mask */
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int exact = 0; /* do not run dbzsize(siz) */
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int dbzint = 1; /* use new interface? */
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char fs = '\t'; /* field separator, default tab */
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int unopen = 0; /* make base unopenable during dbminit? */
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char *change = NULL; /* chdir here before dbmclose */
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#define DEFBUF 1024 /* default line-buffer size */
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int buflen = DEFBUF; /* line length limit */
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char lbuf[DEFBUF];
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char *line = lbuf;
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char cbuf[DEFBUF];
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char *cmp = cbuf;
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void fail();
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void dofile();
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void runs();
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void dosweep();
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void mkfiles();
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void crfile();
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void doline();
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void process();
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#ifdef HAVERFCIZE
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extern char *rfc822ize();
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#else
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#define rfc822ize(n) (n)
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#endif
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extern char *malloc();
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/*
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- main - parse arguments and handle options
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*/
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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int c;
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int errflg = 0;
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extern int optind;
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extern char *optarg;
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int doruns = 0;
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extern long atol();
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progname = argv[0];
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while ((c = getopt(argc, argv, "axcmt:l:R0E:SqOiX:Yuf:p:eMUC:d")) != EOF)
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switch (c) {
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case 'a': /* append to existing table */
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if (op != 'b')
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fail("only one of -a -x -c -m can be given", "");
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op = 'a';
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baseinput = 0;
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break;
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case 'x': /* extract from existing table */
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if (op != 'b')
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fail("only one of -a -x -c -m can be given", "");
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op = 'x';
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baseinput = 0;
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break;
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case 'c': /* check existing table */
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if (op != 'b')
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fail("only one of -a -x -c -m can be given", "");
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op = 'c';
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break;
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case 'm': /* extract missing (complement of -x) */
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if (op != 'b')
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fail("only one of -a -x -c -m can be given", "");
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op = 'm';
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baseinput = 0;
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break;
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case 't': /* set field separator */
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if (strlen(optarg) > 1)
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fail("only one field separator allowed", "");
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fs = *optarg;
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break;
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case 'l': /* override line-length limit */
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buflen = atoi(optarg) + 1;
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if (buflen <= 2)
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fail("bad -l value `%s'", optarg);
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line = malloc(buflen);
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cmp = malloc(buflen);
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if (line == NULL || cmp == NULL)
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fail("cannot allocate %s-byte buffers", optarg);
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break;
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case 'R': /* print run statistics */
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doruns = 1;
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break;
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case '0': /* omit lines tagged (by fake -t) with 0 */
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omitzero = 1;
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break;
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case 'E': /* report every n items */
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every = atol(optarg);
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break;
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case 'S': /* dbzsync() on each -E report */
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syncs = 1;
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break;
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case 'q': /* quick check or extract */
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quick = 1;
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break;
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case 'O': /* sweep file checking all offsets */
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sweep = 1;
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break;
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case 'i': /* don't use incore */
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useincore = 0;
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break;
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case 'X': /* set xxx */
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xxx = atoi(optarg);
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break;
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case 'Y': /* print xxx afterward */
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printx = 1;
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break;
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case 'u': /* don't check uniqueness */
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unique = 0;
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break;
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case 'f': /* init from existing table's parameters */
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from = optarg;
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break;
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case 'p': /* parameters for dbzfresh */
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if (sscanf(optarg, "%ld %1s %lx", &siz, &map, &tag) != 3) {
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map = '?';
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tag = 0;
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if (sscanf(optarg, "%ld", &siz) != 1)
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fail("bad -n value `%s'", optarg);
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}
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usefresh = 1;
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break;
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case 'e': /* -p size is exact, don't dbzsize() it */
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exact = 1;
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break;
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case 'M': /* use old dbm interface + rfc822ize */
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dbzint = 0;
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break;
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case 'U': /* make base unopenable during init */
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unopen = 1;
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break;
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case 'C': /* change directories before dbmclose */
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change = optarg;
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break;
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case 'd': /* Debugging. */
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if (dbzdebug(1) < 0)
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fail("dbz debugging not available", "");
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break;
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case '?':
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default:
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errflg++;
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break;
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}
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if (errflg || optind >= argc || (optind+1 < argc && baseinput)) {
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fprintf(stderr, "usage: %s ", progname);
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fprintf(stderr, "[-a] [-x] [-c] database [file] ...\n");
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exit(2);
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}
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(void) dbzincore(useincore);
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my_basename = argv[optind];
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pagname = str2dup(my_basename, ".pag");
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dir_name = str2dup(my_basename, ".dir");
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mkfiles();
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optind++;
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if (baseinput) /* implies no further arguments */
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process(base, my_basename);
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else if (optind >= argc)
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process(stdin, "stdin");
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else
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for (; optind < argc; optind++)
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dofile(argv[optind]);
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if (change != NULL)
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(void) chdir(change);
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if (dbmclose() < 0)
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fail("dbmclose failed", "");
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if (doruns)
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runs(pagname);
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if (sweep)
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dosweep(my_basename, pagname);
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if (printx)
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printf("%ld\n", xxx);
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#ifdef DBZ_FINISH
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DBZ_FINISH;
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#endif
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exit(0);
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}
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/*
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- dofile - open a file and invoke process()
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*/
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void
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dofile(name)
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char *name;
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{
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register FILE *in;
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if (STREQ(name, "-"))
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process(stdin, "-");
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else {
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in = fopen(name, "r");
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if (in == NULL)
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fail("cannot open `%s'", name);
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process(in, name);
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(void) fclose(in);
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}
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}
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/*
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- mkfiles - create empty files and open them up
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*/
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void
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mkfiles()
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{
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if (op == 'b' && !dbzint) {
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crfile(dir_name);
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crfile(pagname);
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}
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base = fopen(my_basename, (op == 'a') ? "a" : "r");
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if (base == NULL)
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fail("cannot open `%s'", my_basename);
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if (unopen)
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(void) chmod(my_basename, 0);
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if (from != NULL) {
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if (dbzagain(my_basename, from) < 0)
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fail("dbzagain(`%s'...) failed", my_basename);
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} else if (op == 'b' && dbzint) {
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if (!exact)
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siz = dbzsize(siz);
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if (dbzfresh(my_basename, siz, (int)fs, map, tag) < 0)
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fail("dbzfresh(`%s'...) failed", my_basename);
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} else if (dbminit(my_basename) < 0)
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fail("dbminit(`%s') failed", my_basename);
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if (unopen)
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(void) chmod(my_basename, 0600); /* hard to restore original */
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}
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/*
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- crfile - create a file
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*/
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void
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crfile(name)
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char *name;
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{
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register int f;
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f = creat(name, 0666);
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if (f < 0)
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fail("cannot create `%s'", name);
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(void) close(f);
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}
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/*
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- process - process input file
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*/
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void
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process(in, name)
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FILE *in;
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char *name;
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{
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register off_t place;
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inname = name;
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lineno = 0;
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for (;;) {
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place = ftell(in);
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if (fgets(line, buflen, in) == NULL)
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return;
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lineno++;
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if (every > 0 && lineno%every == 0) {
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fprintf(stderr, "%ld\n", lineno);
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if (dbzsync() < 0)
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fail("dbzsync failed", "");
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}
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doline(line, place);
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}
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/* NOTREACHED */
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}
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/*
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- doline - process input line
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*/
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void
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doline(lp, inoffset)
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char *lp;
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off_t inoffset;
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{
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register char *p;
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register char pc;
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datum key, value;
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off_t place = inoffset;
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register int shouldfind;
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register int llen;
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char keytext[DBZMAXKEY+1];
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p = NULL;
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if (fs != '\0')
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p = strchr(lp, fs);
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if (p == NULL)
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p = lp + strlen(lp);
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if (p > lp && *(p-1) == '\n')
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p--;
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if (p - lp > DBZMAXKEY)
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fail("key of `%.40s...' too long", lp);
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pc = *p;
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*p = '\0';
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(void) strcpy(keytext, lp);
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*p = pc;
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key.dptr = (dbzint) ? keytext : rfc822ize(keytext);
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key.dsize = strlen(keytext)+1;
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switch (op) {
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case 'a':
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place = ftell(base);
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llen = strlen(lp);
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if (fwrite(lp, 1, llen, base) != llen)
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fail("write error in `%s'", my_basename);
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/* FALLTHROUGH */
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case 'b':
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if (omitzero && p != NULL && *(p+1) == '0')
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return;
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if (unique) {
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value = (dbzint) ? dbzfetch(key) : fetch(key);
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if (value.dptr != NULL)
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fail("`%.40s...' already present", lp);
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}
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value.dptr = (char *)&place;
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value.dsize = (int)sizeof(off_t);
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if (((dbzint) ? dbzstore(key, value) : store(key, value)) < 0)
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fail("store failed on `%.40s...'", lp);
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break;
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case 'c':
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value = (dbzint) ? dbzfetch(key) : fetch(key);
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shouldfind = (omitzero && p != NULL && *(p+1) == '0') ? 0 : 1;
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if (!shouldfind && (value.dptr != NULL || value.dsize != 0))
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fail("`%.40s...' found, shouldn't be", lp);
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if (shouldfind && (value.dptr == NULL ||
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value.dsize != sizeof(off_t)))
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fail("can't find `%.40s...'", lp);
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if (shouldfind && !quick) {
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(void) memcpy((char *)&place, value.dptr, sizeof(off_t));
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if (place != inoffset)
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fail("offset mismatch on `%.40s...'", lp);
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if (fseek(base, place, SEEK_SET) == -1)
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fail("fseek failed on `%.40s...'", lp);
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if (fgets(cmp, buflen, base) == NULL)
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fail("can't read line for `%.40s...'", lp);
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if (!STREQ(lp, cmp))
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fail("compare failed on `%.40s...'", lp);
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}
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break;
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case 'x':
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value = (dbzint) ? dbzfetch(key) : fetch(key);
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if (value.dptr != NULL && !quick) {
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(void) memcpy((char *)&place, value.dptr, sizeof(off_t));
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if (fseek(base, place, SEEK_SET) == -1)
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fail("fseek failed on `%.40s...'", lp);
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if (fgets(cmp, buflen, base) == NULL)
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fail("can't read line for `%.40s...'", lp);
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fputs(cmp, stdout);
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} else if (value.dptr != NULL)
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fputs(lp, stdout);
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break;
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case 'm':
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value = (dbzint) ? dbzfetch(key) : fetch(key);
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if (value.dptr == NULL) {
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fputs(keytext, stdout);
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putchar('\n');
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}
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break;
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default:
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fail("unknown operator -- can't happen", "");
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break;
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}
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}
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/*
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- runs - print run statistics
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*/
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void
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runs(file)
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char *file;
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{
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register FILE *fd;
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off_t it;
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register long run;
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fd = fopen(file, "r");
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if (fd == NULL)
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fail("cannot reopen `%s'", file);
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run = 0;
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while (fread((char *)&it, sizeof(off_t), 1, fd) == 1) {
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if (it != 0)
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run++;
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else if (run > 0) {
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printf("%ld\n", run);
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run = 0;
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}
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}
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(void) fclose(fd);
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}
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/*
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- dosweep - sweep pag file checking for valid offsets
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*/
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void
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dosweep(fn, pn)
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char *fn;
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char *pn;
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{
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register FILE *pf;
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off_t it;
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char nl;
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register FILE *hf;
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hf = fopen(fn, "r");
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if (hf == NULL)
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fail("cannot reopen `%s'", fn);
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pf = fopen(pn, "r");
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if (pf == NULL)
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fail("cannot reopen `%s'", pn);
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while (fread((char *)&it, sizeof(off_t), 1, pf) == 1) {
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it = (it & ((off_t)0x80000000)) ? (it&~((off_t)0xff000000)) : it;
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if (it != 0 && it != 1) { /* 0 empty, 1 known okay */
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it--; /* get rid of bias */
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(void) fseek(hf, it-1, SEEK_SET);
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nl = getc(hf);
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if (nl != '\n')
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fprintf(stderr, "offset 0%lo does not point to line\n",
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(long)it);
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}
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}
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(void) fclose(hf);
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(void) fclose(pf);
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}
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/*
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- fail - complain and die
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*/
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void
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fail(s1, s2)
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char *s1;
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char *s2;
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{
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fprintf(stderr, "%s: (file `%s', line %ld) ", progname, inname, lineno);
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fprintf(stderr, s1, s2);
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fprintf(stderr, "\n");
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exit(1);
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}
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/*
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- str2dup - concatenate strings and malloc result
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*/
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char *
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str2dup(s1, s2)
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char *s1;
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char *s2;
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{
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register char *p;
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p = malloc((size_t)strlen(s1) + strlen(s2) + 1);
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if (p == NULL)
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fail("can't allocate space for strings", "");
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(void) strcpy(p, s1);
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(void) strcat(p, s2);
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return(p);
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}
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