bigram
Bigram does not remove newline at end of filename. This
break particulary the bigram algorithm and /var/db/locate.database
grow up 15 %.
Bigram does not check for characters outside 32-127.
The bigram output is silly and need ~1/2 CPU time of
database rebuilding.
old:
locate.bigram < $filelist | sort | uniq -c | sort -nr
^^^^^^^^^^^^^^
this can easy made bigram
new:
bigram < $filelist | sort -nr
code
Code does not check for char 31.
Use a lookup array instead a function. 3 x faster.
updatedb
rewritten
sync with bigram changes
read config file /etc/locate.rc if exists
submitted by: guido@gvr.win.tue.nl (Guido van Rooij)
concatdb - concatenate locate databases
mklocatedb - build locate database
This commit is contained in:
Wolfram Schneider
parent
aa648cf84b
commit
370021810a
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=17592
@ -1,4 +1,5 @@
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# @(#)Makefile 8.1 (Berkeley) 6/6/93
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# $Id$
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SUBDIR= bigram code locate
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3
usr.bin/locate/Makefile.inc
Normal file
3
usr.bin/locate/Makefile.inc
Normal file
@ -0,0 +1,3 @@
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# $Id$
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LIBEXECDIR?= /usr/libexec
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@ -2,6 +2,8 @@
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PROG= locate.bigram
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NOMAN= noman
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BINDIR= /usr/libexec
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BINDIR= ${LIBEXECDIR}
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CFLAGS+= -I${.CURDIR}/../locate
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.include "../Makefile.inc"
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.include <bsd.prog.mk>
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@ -53,32 +53,65 @@ static char sccsid[] = "@(#)locate.bigram.c 8.1 (Berkeley) 6/6/93";
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#include <stdio.h>
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#include <sys/param.h> /* for MAXPATHLEN */
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#include <string.h> /* memchr */
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#include "locate.h"
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char buf1[MAXPATHLEN] = " ";
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char buf2[MAXPATHLEN];
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u_char buf1[MAXPATHLEN] = " ";
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u_char buf2[MAXPATHLEN];
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unsigned int bigram[UCHAR_MAX][UCHAR_MAX];
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main ( )
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void main ( )
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{
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register char *cp;
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register char *oldpath = buf1, *path = buf2;
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register u_char *cp;
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register u_char *oldpath = buf1, *path = buf2;
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register int i, j;
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/* init bigram buffer */
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for (i = 0; i < UCHAR_MAX; i++)
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for (j = 0; j < UCHAR_MAX; j++)
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bigram[i][j] = 0;
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while ( fgets ( path, sizeof(buf2), stdin ) != NULL ) {
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/* skip empty lines */
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if (*path == '\n')
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continue;
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/* Squelch characters that would botch the decoding. */
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for (cp = path; *cp != NULL; cp++) {
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/* chop newline */
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if (*cp == '\n')
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*cp = NULL;
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/* range */
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else if (*cp < ASCII_MIN || *cp > ASCII_MAX)
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*cp = '?';
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}
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/* skip longest common prefix */
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for ( cp = path; *cp == *oldpath; cp++, oldpath++ )
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if ( *oldpath == NULL )
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break;
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for (cp = path; *cp == *oldpath && *cp; cp++, oldpath++);
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/*
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* output post-residue bigrams only
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*/
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/* check later for boundary */
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while ( *cp != NULL && *(cp + 1) != NULL ) {
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putchar ( *cp++ );
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putchar ( *cp++ );
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putchar ( '\n' );
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bigram[*cp][*(cp+1)]++;
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cp += 2;
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}
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if ( path == buf1 ) /* swap pointers */
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path = buf2, oldpath = buf1;
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else
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path = buf1, oldpath = buf2;
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}
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/* output, boundary check */
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for (i = ASCII_MIN; i <= ASCII_MAX; i++)
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for (j = ASCII_MIN; j <= ASCII_MAX; j++)
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if (bigram[i][j] != 0)
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fprintf(stdout, "%4d %c%c\n",
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bigram[i][j], i, j);
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}
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@ -1,8 +1,9 @@
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# @(#)Makefile 8.1 (Berkeley) 6/6/93
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PROG= locate.code
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CFLAGS+=-I${.CURDIR}/../locate
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CFLAGS+=-I${.CURDIR}/../locate
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NOMAN= noman
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BINDIR= /usr/libexec
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BINDIR= ${LIBEXECDIR}
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.include "../Makefile.inc"
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.include <bsd.prog.mk>
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@ -89,25 +89,38 @@ static char sccsid[] = "@(#)locate.code.c 8.1 (Berkeley) 6/6/93";
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#define BGBUFSIZE (NBG * 2) /* size of bigram buffer */
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char buf1[MAXPATHLEN + 1] = " ";
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char buf2[MAXPATHLEN + 1];
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u_char buf1[MAXPATHLEN] = " ";
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u_char buf2[MAXPATHLEN];
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char bigrams[BGBUFSIZE + 1] = { 0 };
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#define LOOKUP 1
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#ifdef LOOKUP
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#define BGINDEX(x) (big[(u_int)*x][(u_int)*(x+1)])
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typedef u_char bg_t;
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bg_t big[UCHAR_MAX][UCHAR_MAX];
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#else
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#define BGINDEX(x) bgindex(x)
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typedef int bg_t;
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#endif
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int bgindex __P((char *));
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void usage __P((void));
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extern int optind;
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extern int optopt;
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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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register char *cp, *oldpath, *path;
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register u_char *cp, *oldpath, *path;
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int ch, code, count, diffcount, oldcount;
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FILE *fp;
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register int i, j;
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while ((ch = getopt(argc, argv, "")) != EOF)
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switch(ch) {
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case '?':
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default:
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usage();
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}
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@ -126,27 +139,38 @@ main(argc, argv)
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err(1, "stdout");
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(void)fclose(fp);
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#ifdef LOOKUP
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/* init lookup table */
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for (i = 0; i < UCHAR_MAX; i++)
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for (j = 0; j < UCHAR_MAX; j++)
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big[i][j] = (bg_t)-1;
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for (cp = bigrams, i = 0; *cp != NULL; i += 2, cp += 2)
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big[(int)*cp][(int)*(cp + 1)] = (bg_t)i;
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#endif
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oldpath = buf1;
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path = buf2;
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oldcount = 0;
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while (fgets(path, sizeof(buf2) - 1, stdin) != NULL) {
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/* Truncate newline. */
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cp = path + strlen(path) - 1;
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if (cp > path && *cp == '\n')
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*cp = '\0';
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while (fgets(path, sizeof(buf2), stdin) != NULL) {
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/* skip empty lines */
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if (*path == '\n')
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continue;
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/* Squelch characters that would botch the decoding. */
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for (cp = path; *cp != NULL; cp++) {
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if ((u_char)*cp >= PARITY)
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*cp &= PARITY-1;
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if (*cp <= SWITCH)
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/* chop newline */
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if (*cp == '\n')
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*cp = NULL;
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/* range */
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else if (*cp < ASCII_MIN || *cp > ASCII_MAX)
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*cp = '?';
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}
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/* Skip longest common prefix. */
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for (cp = path; *cp == *oldpath; cp++, oldpath++)
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if (*oldpath == NULL)
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break;
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for (cp = path; *cp == *oldpath && *cp; cp++, oldpath++);
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count = cp - path;
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diffcount = count - oldcount + OFFSET;
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oldcount = count;
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@ -164,7 +188,7 @@ main(argc, argv)
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err(1, "stdout");
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break;
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}
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if ((code = bgindex(cp)) < 0) {
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if ((code = BGINDEX(cp)) == (bg_t)-1) {
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if (putchar(*cp++) == EOF ||
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putchar(*cp++) == EOF)
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err(1, "stdout");
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@ -189,6 +213,7 @@ main(argc, argv)
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exit(0);
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}
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#ifndef LOOKUP
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int
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bgindex(bg) /* Return location of bg in bigrams or -1. */
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char *bg;
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@ -202,6 +227,7 @@ bgindex(bg) /* Return location of bg in bigrams or -1. */
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break;
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return (*p == NULL ? -1 : --p - bigrams);
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}
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#endif /* !LOOKUP */
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void
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usage()
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@ -1,12 +1,22 @@
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# @(#)Makefile 8.1 (Berkeley) 6/6/93
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# $Id: Makefile,v 1.3 1996/04/25 15:54:22 wosch Exp wosch $
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PROG= locate
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MAN1= locate.1
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MAN8= locate.updatedb.8
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SCRIPTS= updatedb mklocatedb concatdb
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MLINKS+= locate.updatedb.8 updatedb.8
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beforeinstall:
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.for script in ${SCRIPTS}
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${INSTALL} -c -o ${BINOWN} -g ${BINGRP} -m ${BINMODE} \
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${.CURDIR}/updatedb.sh ${DESTDIR}/usr/libexec/locate.updatedb
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${.CURDIR}/${script}.sh ${DESTDIR}${LIBEXECDIR}/locate.${script}
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.endfor
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# only /usr/src/etc/Makefile install files in /etc
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# ${INSTALL} -c -o root -g wheel -m 644 \
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# ${.CURDIR}/locate.rc ${DESTDIR}/etc
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.include "../../Makefile.inc"
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.include "../Makefile.inc"
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.include <bsd.prog.mk>
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49
usr.bin/locate/locate/concatdb.sh
Normal file
49
usr.bin/locate/locate/concatdb.sh
Normal file
@ -0,0 +1,49 @@
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#!/bin/sh
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#
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# (c) Wolfram Schneider, Berlin. September 1995. Public domain.
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#
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# concatdb - concatenate locate databases
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#
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# usage: concatdb database1 ... databaseN > newdb
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#
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# Sequence of databases is important.
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#
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# $Id: concatdb.sh,v 1.2 1996/04/20 21:55:21 wosch Exp wosch $
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# The directory containing locate subprograms
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: ${LIBEXECDIR=/usr/libexec}; export LIBEXECDIR
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PATH=$LIBEXECDIR:/bin:/usr/bin:$PATH; export PATH
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umask 077 # protect temp files
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: ${TMPDIR=/tmp}; export TMPDIR;
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if test X"$TMPDIR" = X -o ! -d "$TMPDIR"; then
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TMPDIR=/tmp; export TMPDIR
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fi
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# utilities to built locate database
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: ${bigram=locate.bigram}
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: ${code=locate.code}
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: ${sort=sort}
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case $# in
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[01]) echo 'usage: concatdb databases1 ... databaseN > newdb'
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exit 1
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;;
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esac
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bigrams=$TMPDIR/_concatdb$$.bigrams
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trap 'rm -f $bigrams' 0 1 2 3 5 10 15
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for db
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do
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$locate -d $db /
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done | $bigram | $sort -nr | awk 'NR <= 128 { printf $2 }' > $bigrams
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for db
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do
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$locate -d $db /
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done | $code $bigrams
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@ -39,3 +39,29 @@
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#define OFFSET 14 /* abs value of max likely diff */
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#define PARITY 0200 /* parity bit */
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#define SWITCH 30 /* switch code */
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/* 0-28 likeliest differential counts + offset to make nonnegative */
|
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#define LDC_MIN 0
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#define LDC_MAX 28
|
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|
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/* 128-255 bigram codes (128 most common, as determined by 'updatedb') */
|
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#define BIGRAM_MIN (UCHAR_MAX - CHAR_MAX)
|
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#define BIGRAM_MAX UCHAR_MAX
|
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|
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/* 32-127 single character (printable) ascii residue (ie, literal) */
|
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#define ASCII_MIN 32
|
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#define ASCII_MAX CHAR_MAX
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|
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/* #define TO7BIT(x) (x = ( ((u_char)x) & CHAR_MAX )) */
|
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#define TO7BIT(x) (x = x & CHAR_MAX )
|
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|
||||
|
||||
#if UCHAR_MAX >= 4096
|
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define TOLOWER(ch) tolower(ch)
|
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#else
|
||||
|
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u_char myctype[UCHAR_MAX + 1];
|
||||
#define TOLOWER(ch) (myctype[ch])
|
||||
#endif
|
||||
|
||||
#define INTSIZE (sizeof(int))
|
||||
|
||||
23
usr.bin/locate/locate/locate.rc
Normal file
23
usr.bin/locate/locate/locate.rc
Normal file
@ -0,0 +1,23 @@
|
||||
#
|
||||
# /etc/locate.rc - command script for updatedb(8)
|
||||
#
|
||||
# $Id: locate.rc,v 1.1 1996/04/26 15:25:23 wosch Exp wosch $
|
||||
|
||||
# temp directory
|
||||
#TMPDIR="/tmp"
|
||||
|
||||
# the actual database
|
||||
#FCODES="/var/db/locate.database"
|
||||
|
||||
# directories to be put in the database
|
||||
#SEARCHPATHS="/"
|
||||
|
||||
# directories unwanted in output
|
||||
#PRUNEPATHS="/tmp /usr/tmp /var/tmp"
|
||||
|
||||
# filesystems allowed. Beware: a non-listed filesystem will be pruned
|
||||
# and is the SEARCHPATHS starts in such a filesystem locate will build
|
||||
# an empty database
|
||||
#
|
||||
# be carefully if you add 'nfs'
|
||||
#FILESYSTEMS="ufs"
|
||||
52
usr.bin/locate/locate/mklocatedb.sh
Normal file
52
usr.bin/locate/locate/mklocatedb.sh
Normal file
@ -0,0 +1,52 @@
|
||||
#!/bin/sh
|
||||
#
|
||||
# (c) Wolfram Schneider, September 1995. Public domain.
|
||||
#
|
||||
# mklocatedb - build locate database
|
||||
#
|
||||
# usage: mklocatedb [-presort] < filelist > database
|
||||
#
|
||||
# $Id: mklocatedb.sh,v 1.2 1996/04/20 21:55:21 wosch Exp wosch $
|
||||
|
||||
|
||||
# The directory containing locate subprograms
|
||||
: ${LIBEXECDIR=/usr/libexec}; export LIBEXECDIR
|
||||
|
||||
PATH=$LIBEXECDIR:/bin:/usr/bin:$PATH; export PATH
|
||||
|
||||
umask 077 # protect temp files
|
||||
|
||||
: ${TMPDIR=/tmp}; export TMPDIR;
|
||||
if test X"$TMPDIR" = X -o ! -d "$TMPDIR"; then
|
||||
TMPDIR=/tmp; export TMPDIR
|
||||
fi
|
||||
|
||||
# utilities to built locate database
|
||||
: ${bigram=locate.bigram}
|
||||
: ${code=locate.code}
|
||||
: ${sort=sort}
|
||||
|
||||
|
||||
sortopt="-u -T $TMPDIR"
|
||||
sortcmd=$sort
|
||||
|
||||
# Input already sorted
|
||||
case X"$1" in
|
||||
X-nosort|X-presort) sortcmd=cat; sortopt=;shift;;
|
||||
esac
|
||||
|
||||
|
||||
bigrams=$TMPDIR/_mklocatedb$$.bigrams
|
||||
filelist=$TMPDIR/_mklocatedb$$.list
|
||||
|
||||
trap 'rm -f $bigrams $filelist' 0 1 2 3 5 10 15
|
||||
|
||||
|
||||
if $sortcmd $sortopt > $filelist; then
|
||||
$bigram < $filelist | $sort -nr |
|
||||
awk 'NR <= 128 { printf $2 }' > $bigrams &&
|
||||
$code $bigrams < $filelist
|
||||
else
|
||||
echo "`basename $0`: cannot build locate database" >&2
|
||||
exit 1
|
||||
fi
|
||||
@ -1,79 +1,62 @@
|
||||
#!/bin/sh
|
||||
#
|
||||
# Copyright (c) 1989, 1993
|
||||
# The Regents of the University of California. All rights reserved.
|
||||
# (c) Wolfram Schneider, Berlin. September 1995. Public domain.
|
||||
#
|
||||
# This code is derived from software contributed to Berkeley by
|
||||
# James A. Woods.
|
||||
#
|
||||
# Modified to be a /bin/sh script by Nate Williams
|
||||
#
|
||||
# Redistribution and use in source and binary forms, with or without
|
||||
# modification, are permitted provided that the following conditions
|
||||
# are met:
|
||||
# 1. Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
|
||||
# 2. Redistributions in binary form must reproduce the above copyright
|
||||
# notice, this list of conditions and the following disclaimer in the
|
||||
# documentation and/or other materials provided with the distribution.
|
||||
# 3. All advertising materials mentioning features or use of this software
|
||||
# must display the following acknowledgement:
|
||||
# This product includes software developed by the University of
|
||||
# California, Berkeley and its contributors.
|
||||
# 4. Neither the name of the University nor the names of its contributors
|
||||
# may be used to endorse or promote products derived from this software
|
||||
# without specific prior written permission.
|
||||
#
|
||||
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||||
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||||
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
# SUCH DAMAGE.
|
||||
#
|
||||
# @(#)updatedb.csh 8.3 (Berkeley) 3/19/94
|
||||
# updatedb - update locate database for local mounted filesystems
|
||||
#
|
||||
# $Id: updatedb.sh,v 1.3 1996/04/20 21:55:21 wosch Exp wosch $
|
||||
|
||||
SRCHPATHS="/" # directories to be put in the database
|
||||
LIBDIR="/usr/libexec" # for subprograms
|
||||
FCODES="/var/db/locate.database" # the database
|
||||
if [ "$TMPDIR" = "" ]; then
|
||||
TMPDIR="/var/tmp" # for temp files
|
||||
LOCATE_CONFIG="/etc/locate.rc"
|
||||
if [ -f "$LOCATE_CONFIG" -a -r "$LOCATE_CONFIG" ]; then
|
||||
. $LOCATE_CONFIG
|
||||
fi
|
||||
|
||||
PATH=/bin:/usr/bin
|
||||
BIGRAMS="$TMPDIR/locate.bigrams.$$"
|
||||
FILELIST="$TMPDIR/locate.list.$$"
|
||||
ERRS="$TMPDIR/locate.errs.$$"
|
||||
# The directory containing locate subprograms
|
||||
: ${LIBEXECDIR=/usr/libexec}; export LIBEXECDIR
|
||||
|
||||
# Make a file list and compute common bigrams.
|
||||
# Alphabetize '/' before any other char with 'tr'.
|
||||
# If the system is very short of sort space, 'bigram' can be made
|
||||
# smarter to accumulate common bigrams directly without sorting
|
||||
# ('awk', with its associative memory capacity, can do this in several
|
||||
# lines, but is too slow, and runs out of string space on small machines).
|
||||
PATH=$LIBEXECDIR:/bin:/usr/bin:$PATH; export PATH
|
||||
|
||||
# search locally or everything
|
||||
# find ${SRCHPATHS} -print | \
|
||||
find ${SRCHPATHS} ! -fstype ufs -prune -or -print | \
|
||||
tr '/' '\001' | \
|
||||
(sort -T $TMPDIR -f; echo $? > $ERRS) | tr '\001' '/' > $FILELIST
|
||||
|
||||
$LIBDIR/locate.bigram < $FILELIST | \
|
||||
(sort -T $TMPDIR ; echo $? >> $ERRS) | \
|
||||
uniq -c | sort -T $TMPDIR -nr | \
|
||||
awk '{ if (NR <= 128) print $2 }' | tr -d '\012' > $BIGRAMS
|
||||
: ${mklocatedb=locate.mklocatedb} # make locate database program
|
||||
: ${FCODES=/var/db/locate.database} # the database
|
||||
: ${SEARCHPATHS="/"} # directories to be put in the database
|
||||
: ${PRUNEPATHS="/tmp /usr/tmp /var/tmp"} # unwanted directories
|
||||
: ${FILESYSTEMS="ufs"} # allowed filesystems
|
||||
: ${find=find}
|
||||
|
||||
# code the file list
|
||||
if [ `sort -u $ERRS | grep -s -v 0` ]; then
|
||||
printf 'locate: updatedb failed\n\n'
|
||||
else
|
||||
$LIBDIR/locate.code $BIGRAMS < $FILELIST > $FCODES
|
||||
chmod 644 $FCODES
|
||||
rm $BIGRAMS $FILELIST $ERRS
|
||||
case X"$SEARCHPATHS" in
|
||||
X) echo "$0: empty variable SEARCHPATHS"; exit 1;; esac
|
||||
case X"$FILESYSTEMS" in
|
||||
X) echo "$0: empty variable FILESYSTEMS"; exit 1;; esac
|
||||
|
||||
# Make a list a paths to exclude in the locate run
|
||||
excludes="! (" or=""
|
||||
for fstype in $FILESYSTEMS
|
||||
do
|
||||
excludes="$excludes $or -fstype $fstype"
|
||||
or="-or"
|
||||
done
|
||||
excludes="$excludes ) -prune"
|
||||
|
||||
case X"$PRUNEPATHS" in
|
||||
X) ;;
|
||||
*) for path in $PRUNEPATHS
|
||||
do
|
||||
excludes="$excludes -or -path $path -prune"
|
||||
done;;
|
||||
esac
|
||||
|
||||
tmp=${TMPDIR=/tmp}/_updatedb$$
|
||||
trap 'rm -f $tmp' 0 1 2 3 5 10 15
|
||||
|
||||
# search locally
|
||||
# echo $find $SEARCHPATHS $excludes -or -print && exit
|
||||
if $find $SEARCHPATHS $excludes -or -print 2>/dev/null |
|
||||
$mklocatedb > $tmp
|
||||
then
|
||||
case X"`$find $tmp -size -257c -print`" in
|
||||
X) cat $tmp > $FCODES;;
|
||||
*) echo "updatedb: locate database $tmp is empty"
|
||||
exit 1
|
||||
esac
|
||||
fi
|
||||
|
||||
Loading…
Reference in New Issue
Block a user