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main.c
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main.c
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/* Copyright (c) 1994 Sun Wu, Udi Manber, Burra Gopal. All Rights Reserved. */
/* bgopal: (1993-4) redesigned/rewritten using agrep's library interface */
#include <autoconf.h>
#include <sys/param.h>
#include <errno.h>
#include "glimpse.h"
#include "defs.h"
#include <fcntl.h>
#include "checkfile.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/file.h> /* for flock definition */
#if ISO_CHAR_SET
#include <locale.h> /* support for 8bit character set */
#endif
#define CLIENTSERVER 1
#define USE_MSGHDR 0
#define USE_UNIXDOMAIN 0
#define DEBUG 0
#define DEF_SERV_PORT 2001
#define MIN_SERV_PORT 1024
#define MAX_SERV_PORT 30000
#define SERVER_QUEUE_SIZE 10 /* number of requests to buffer up while processing one request = 5 */
/* Borrowed from C-Lib */
extern char **environ;
extern int errno;
#if CLIENTSERVER
#include "communicate.c"
#endif /*CLIENTSERVER*/
/* For client-server protocol */
CHAR *SERV_HOST = NULL;
int SERV_PORT;
char glimpse_reqbuf[MAX_ARGS*MAX_NAME_LEN];
extern int glimpse_clientdied; /* set if signal received about dead socket: need agrep variable so that exec() can return quickly */
int glimpse_reinitialize = 0;
/* Borrowed from agrep.c */
extern int D_length; /* global variable in agrep */
extern int D; /* global variable in agrep */
extern int pattern_index;
/* These are used for byte level index search */
extern CHAR CurrentFileName[MAX_LINE_LEN];
extern int SetCurrentFileName;
extern int CurrentByteOffset;
extern int SetCurrentByteOffset;
extern long CurrentFileTime;
extern int SetCurrentFileTime;
extern int execfd;
extern int agrep_initialfd;
extern CHAR *agrep_inbuffer;
extern int agrep_inlen;
extern int agrep_inpointer;
extern FILE *agrep_finalfp;
extern CHAR *agrep_outbuffer;
extern int agrep_outlen;
extern int agrep_outpointer;
extern int glimpse_call; /* prevent agrep from printing out its usage */
extern int glimpse_isserver; /* prevent agrep from asking for user input */
int first_search = 1; /* intra/interaction in process_query() and glimpse_search() */
#if ISSERVER
int RemoteFiles = 0; /* Are the files present locally or remotely? If on, then -NQ is automatically added to all search options for each query */
#endif
/* Borrowed from index/io.c */
extern int InfoAfterFilename;
extern int OneFilePerBlock;
extern int StructuredIndex;
extern unsigned int *dest_index_set;
extern unsigned char *dest_index_buf;
extern unsigned int *src_index_set;
extern unsigned char *src_index_buf;
extern unsigned char *merge_index_buf;
extern int mask_int[32];
extern int indexable_char[256];
int test_indexable_char[256];
extern int p_table[MAX_PARTITION];
extern int GMAX_WORD_SIZE;
extern int IndexNumber; /* used in getword() */
extern int InterpretSpecial; /* used to "not-split" agrep-regexps */
extern int UseFilters; /* defined in build_in.c, used for filtering routines in io.c */
extern int ByteLevelIndex;
extern int RecordLevelIndex;
extern int rdelim_len;
extern char rdelim[MAX_LINE_LEN];
extern char old_rdelim[MAX_LINE_LEN];
extern int file_num;
extern int REAL_PARTITION, REAL_INDEX_BUF, MAX_ALL_INDEX, FILEMASK_SIZE;
/* Borrowed from get_filename.c */
extern int bigbuffer_size;
extern char *bigbuffer;
extern char *outputbuffer;
/* OPTIONS/FLAGS */
int veryfast = 0;
int CONTACT_SERVER = 0; /* Should client try to call server at all or just process query on its own? */
int NOBYTELEVEL = 0; /* Some cases where we cannot do byte level fast-search: ALWAYS 0 if !ByteLevelIndex */
int OPTIMIZEBYTELEVEL = 0; /* Some cases where we don't want to do byte level search since number of files is small */
int GCONSTANT = 0; /* should pattern be taken as-is or parsed? */
int GLIMITOUTPUT = 0; /* max no. of output lines: 0=>infinity=default=nolimit */
int GLIMITTOTALFILE = 0; /* max no. of files to match: 0=>infinity=default=nolimit */
int GLIMITPERFILE = 0; /* not used in glimpse */
int GBESTMATCH = 0; /* Should I change -B to -# where # = no. of errors? */
int GRECURSIVE = 0;
int GNOPROMPT = 0;
int GBYTECOUNT = 0;
int GPRINTFILENUMBER = 0;
int GPRINTFILETIME = 0;
int GOUTTAIL = 0;
int GFILENAMEONLY = 0; /* how to do it if it is an and expression in structured queries */
int GNOFILENAME=0;
int GPRINTNONEXISTENTFILE = 0; /* if filename is not there in index, then at least let user know its name */
int MATCHFILE = 0;
int PRINTATTR = 0;
int PRINTINDEXLINE = 0;
int Pat_as_is=0;
int Only_first=0; /* Do index search only */
int PRINTAPPXFILEMATCH=0; /* Print places in file where match occurs: useful with -b only to analyse the index */
int GCOUNT=0; /* print number of matches rather than actual matches: used only when PRINTAPPX = 1 */
int HINTSFROMUSER=0; /* The user gives the hints about where we should search (result of adding -EQNgy) */
int WHOLEFILESCOPE=0; /* used only when foundattr is NOT set: otherwise, scope is whole file anyway */
int foundattr=0; /* set in split.c -- != 0 only when StructuredIndex AND query is structured */
int foundnot=0; /* set in split.c -- != 0 only when the not operator (~) is present in the pattern */
int FILENAMESINFILE=0; /* whether the user is providing an explicit list of filenames to be searched for pattern (if absent, then means all files) */
int BITFIELDFILE=0; /* Based on contribution From [email protected] Fri Jul 12 01:56 MST 1996; Christer Holgersson, Sen. SysNet Mgr, Umea University/SUNET, Sweden */
int BITFIELDOFFSET=0;
int BITFIELDLENGTH=0;
int BITFIELDENDIAN=0;
int GNumDays = 0; /* whether the user wants files modified within these many days before creating the index: only >0 makes sense */
/* structured queries */
CHAR ***attr_vals; /* matrix of char pointers: row=max #of attributes, col=max possible values */
CHAR **attr_found; /* did the expression corr. to each value in attr_vals match? */
ParseTree *GParse; /* what kind of expression corr. to attr are we looking for */
/* arbitrary booleans */
ParseTree terminals[MAXNUM_PAT]; /* parse tree's terminal node pointers pt. to elements of this array; also used outside */
char matched_terminals[MAXNUM_PAT]; /* ...[i] is 1 if i'th terminal matched: used in filter_output and eval_tree */
int num_terminals; /* number of terminal patterns */
int ComplexBoolean=0; /* 1 if we need to use parse trees and the eval function */
/* index search */
CHAR *pat_list[MAXNUM_PAT]; /* complete words within global pattern */
int pat_lens[MAXNUM_PAT]; /* their lengths */
int pat_attr[MAXNUM_PAT]; /* set of attributes */
int is_mgrep_pat[MAXNUM_PAT];
int mgrep_pat_index[MAXNUM_PAT];
int num_mgrep_pat;
CHAR pat_buf[(MAXNUM_PAT + 2)*MAXPAT];
int pat_ptr = 0;
extern char INDEX_DIR[MAX_LINE_LEN];
char *TEMP_DIR = NULL; /* directory to store glimpse temporary files, usually /tmp unless -T is specified */
char indexnumberbuf[256]; /* to read in first few lines of the index */
char *index_argv[MAX_ARGS];
int index_argc = 0;
int bestmatcherrors=0; /* set during index search, used later on */
int patindex;
int patbufpos = -1;
char tempfile[MAX_NAME_LEN];
char *filenames_file = NULL;
char *bitfield_file = NULL;
/* agrep search */
char *agrep_argv[MAX_ARGS];
int agrep_argc = 0;
CHAR *FileOpt; /* the option list after -F */
int fileopt_length;
CHAR GPattern[MAXPAT];
int GM;
CHAR APattern[MAXPAT];
int AM;
CHAR GD_pattern[MAXPAT];
int GD_length;
CHAR **GTextfiles;
CHAR **GTextfilenames;
int *GFileIndex;
int GNumfiles;
int GNumpartitions;
CHAR GProgname[MAXNAME];
/* persistent file descriptors */
#if BG_DEBUG
FILE *debug; /* file descriptor for debugging output */
#endif /*BG_DEBUG*/
FILE *timesfp = NULL;
FILE *timesindexfp = NULL;
FILE *indexfp = NULL; /* glimpse index */
FILE *partfp = NULL; /* glimpse partitions */
FILE *minifp = NULL; /* glimpse turbo */
FILE *nullfp = NULL; /* to discard output: agrep -s doesn't work properly */
int svstdin = 0, svstdout = 1, svstderr = 2;
static int one = 1; /* to set socket option so that glimpseserver releases socket after death */
/* Index manipulation */
struct offsets **src_offset_table;
struct offsets **multi_dest_offset_table[MAXNUM_PAT];
unsigned int *multi_dest_index_set[MAXNUM_PAT];
extern free_list();
struct stat index_stat_buf, file_stat_buf;
int timesindexsize = 0;
int last_Y_filenumber = 0;
/* Direct agrep access for bytelevel-indices */
extern int COUNT, INVERSE, TCOMPRESSED, NOFILENAME, POST_FILTER, OUTTAIL, BYTECOUNT, SILENT, NEW_FILE,
LIMITOUTPUT, LIMITPERFILE, LIMITTOTALFILE, PRINTRECORD, DELIMITER, SILENT, FILENAMEONLY, num_of_matched, prev_num_of_matched, FILEOUT;
CHAR matched_region[MAX_REGION_LIMIT*2 + MAXPATT*2];
int RegionLimit=DEFAULT_REGION_LIMIT;
/* Returns number of matched records/lines. Uses agrep's options to output stuff nicely; never called with RecordLevelIndex set */
int
glimpse_search(AM, APattern, GD_length, GD_pattern, realfilename, filename, fileindex, src_offset_table, outfp)
int AM;
unsigned char APattern[];
int GD_length;
unsigned char GD_pattern[];
char *realfilename;
char *filename;
int fileindex;
struct offsets *src_offset_table[];
FILE *outfp;
{
FILE *infp;
char sig[SIGNATURE_LEN];
struct offsets **p1, *tp1;
CHAR *text, *curtextend, *curtextbegin, c;
int times;
int num, ret=0, totalret = 0;
int prevoffset = 0, begininterval = 0, endinterval = -1;
CHAR *beginregionptr = 0, *endregionptr = 0;
int beginpage = 0, endpage = -1;
static int MAXTIMES, MAXPGTIMES, pagesize;
static int first_time = 1;
/*
* If can't open file for read, quit
* For each offset for that file:
* seek to that point
* go back until delimiter, go forward until delimiter, output it: MAX_REGION_LIMIT is 16K on either side.
* read in units of RegionLimit
* before outputting matched record, use options to put prefixes (or use memagrep which does everything?)
* Algorithm changed: don't read same page in twice.
*/
if (first_time) {
pagesize = DISKBLOCKSIZE;
MAXTIMES = ((MAX_REGION_LIMIT / RegionLimit) > 1) ? (MAX_REGION_LIMIT / RegionLimit) : 1;
MAXPGTIMES = ((MAX_REGION_LIMIT / pagesize) > 1) ? (MAX_REGION_LIMIT / pagesize) : 1;
first_time = 0;
}
/* Safety: must end/begin with delim */
memcpy(matched_region, GD_pattern, GD_length);
memcpy(matched_region+MAXPATT+2*MAX_REGION_LIMIT, GD_pattern, GD_length);
text = &matched_region[MAX_REGION_LIMIT+MAXPATT];
if ((infp = my_fopen(filename, "r")) == NULL) return 0;
NEW_FILE = ON;
#if 0
/* Cannot search in .CZ files since offset computations will be incorrect */
TCOMPRESSED = ON;
if (!tuncompressible_filename(file_list[i], strlen(file_list[i]))) TCOMPRESSED = OFF;
num_read = fread(sig, 1, SIGNATURE_LEN, infp);
if ((TCOMPRESSED == ON) && tuncompressible(sig, num_read)) {
EASYSEARCH = sig[SIGNATURE_LEN-1];
if (!EASYSEARCH) {
fprintf(stderr, "not compressed for easy-search: can miss some matches in: %s\n", CurrentFileName); /* not filename!!! */
}
}
else TCOMPRESSED = OFF;
#endif /*0*/
p1 = &src_offset_table[fileindex];
while (*p1 != NULL) {
if ( (begininterval <= (*p1)->offset) && (endinterval > (*p1)->offset) ) { /* already covered this area */
#if DEBUG
printf("ignoring %d in [%d,%d]\n", (*p1)->offset, begininterval, endinterval);
#endif /*DEBUG*/
tp1 = *p1;
*p1 = (*p1)->next;
my_free(tp1, sizeof(struct offsets));
continue;
}
TCOMPRESSED = OFF;
#if 1
if ( (beginpage <= (*p1)->offset) && (endpage >= (*p1)->offset) && (text + ((*p1)->offset - prevoffset) + GD_length < endregionptr)) {
/* beginregionptr = curtextend - GD_length; /* prevent next curtextbegin to go behind previous curtextend (!) */
text += ((*p1)->offset - prevoffset);
prevoffset = (*p1)->offset;
if (!((curtextend = forward_delimiter(text, endregionptr, GD_pattern, GD_length, 1)) < endregionptr))
goto fresh_read;
if (!((curtextbegin = backward_delimiter(text, beginregionptr, GD_pattern, GD_length, 0)) > beginregionptr))
goto fresh_read;
}
else { /* NOT within an area already read: must read another page: if record overlapps page, might read page twice: no time to fix */
fresh_read:
prevoffset = (*p1)->offset;
text = &matched_region[MAX_REGION_LIMIT+MAXPATT]; /* middle: points to occurrence of pattern */
endpage = beginpage = ((*p1)->offset / pagesize) * pagesize;
/* endpage = (((*p1)->offset + pagesize) / pagesize) * pagesize */
endregionptr = beginregionptr = text - ((*p1)->offset - beginpage); /* overlay physical place starting from this logical point */
/* endregionptr = text + (endpage - (*p1)->offset); */
curtextbegin = curtextend = text;
times = 0;
while (times < MAXPGTIMES) {
fseek(infp, endpage, 0);
num = (&matched_region[MAX_REGION_LIMIT*2+MAXPATT] - endregionptr < pagesize) ? (&matched_region[MAX_REGION_LIMIT*2+MAXPATT] - endregionptr) : pagesize;
if ((num = fread(endregionptr, 1, num, infp)) <= 0) break;
endpage += num;
endregionptr += num;
if (endregionptr <= text) {
curtextend = text; /* error in value of offset: file was modified and offsets no longer true: your RISK! */
break;
}
if (((curtextend = forward_delimiter(text, endregionptr, GD_pattern, GD_length, 1)) < endregionptr) ||
(endregionptr >= &matched_region[MAX_REGION_LIMIT*2 + MAXPATT])) break;
times ++;
}
times = 0;
while (times < MAXPGTIMES) { /* I have already read the initial page since endpage is beginpage initially */
if ((curtextbegin = backward_delimiter(text, beginregionptr, GD_pattern, GD_length, 0)) > beginregionptr) break;
if (beginpage > 0) {
if (beginregionptr - pagesize < &matched_region[MAXPATT]) {
if ((num = beginregionptr - &matched_region[MAXPATT]) <= 0) break;
}
else num = pagesize;
beginpage -= num;
beginregionptr -= num;
}
else break;
times ++;
fseek(infp, beginpage, 0);
fread(beginregionptr, 1, num, infp);
}
}
#else /*1*/
/* Find forward delimiter (including delimiter) */
times = 0;
fseek(infp, (*p1)->offset, 0);
while (times < MAXTIMES) {
if ((num = fread(text+RegionLimit*times, 1, RegionLimit, infp)) > 0)
curtextend = forward_delimiter(text, text+RegionLimit*times+num, GD_pattern, GD_length, 1);
if ((curtextend < text+RegionLimit*times+num) || (num < RegionLimit)) break;
times ++;
}
/* Find backward delimiter (including delimiter) */
times = 0;
while (times < MAXTIMES) {
num = ((*p1)->offset - RegionLimit*(times+1)) > 0 ? ((*p1)->offset - RegionLimit*(times+1)) : 0;
fseek(infp, num, 0);
if (num > 0) {
fread(text-RegionLimit*(times+1), 1, RegionLimit, infp);
curtextbegin = backward_delimiter(text, text-RegionLimit*(times+1), GD_pattern, GD_length, 0);
}
else {
fread(text-RegionLimit*times-(*p1)->offset, 1, (*p1)->offset, infp);
curtextbegin = backward_delimiter(text, text-RegionLimit*times-(*p1)->offset, GD_pattern, GD_length, 0);
}
if ((num <= 0) || (curtextbegin > text-RegionLimit*(times+1))) break;
times ++;
}
#endif /*1*/
/* set interval and delete the entry */
begininterval = (*p1)->offset - (text - curtextbegin);
endinterval = (*p1)->offset + (curtextend - text);
if (strncmp(curtextbegin, GD_pattern, GD_length)) {
/* always pass enclosing delimiters to agrep; since we have seen text before curtextbegin + we have space, we can overwrite */
memcpy(curtextbegin - GD_length, GD_pattern, GD_length);
curtextbegin -= GD_length;
}
#if DEBUG
c = *curtextend;
*curtextend = '\0';
printf("%s [%d < %d < %d], text = %d: %s\n", CurrentFileName, begininterval, (*p1)->offset, endinterval, text, curtextbegin);
*curtextend = c;
#endif /*DEBUG*/
tp1 = *p1;
*p1 = (*p1)->next;
my_free(tp1, sizeof(struct offsets));
if (curtextend <= curtextbegin) continue; /* error in offsets/delims */
/*
* Don't call memagrep since that is heavy weight. Call exec
* directly after doing agrep_search()'s preprocessing here.
* PS: can add agrep variable not to do delim search if called from here
* since that prevents unnecessarily scanning the buffer for the 2nd time.
*/
CurrentByteOffset = begininterval+1;
SetCurrentByteOffset = 1;
first_search = 1;
if (first_search) {
if ((ret = memagrep_search(AM, APattern, curtextend-curtextbegin, curtextbegin, 0, outfp)) > 0)
totalret ++; /* += ret */
else if ((ret < 0) && (errno == AGREP_ERROR)) {
fclose(infp);
return -1;
}
first_search = 0;
}
else { /* All agrep globals are properly set: has a bug because agrep's globals aren't properly reinitialized without agrep_search :-( */
agrep_finalfp = (FILE *)outfp;
agrep_outlen = 0;
agrep_outbuffer = NULL;
agrep_outpointer = 0;
execfd = agrep_initialfd = -1;
agrep_inbuffer = curtextbegin;
agrep_inlen = curtextend - curtextbegin;
agrep_inpointer = 0;
if ((ret = exec(-1, NULL)) > 0)
totalret ++; /* += ret; */
else if ((ret < 0) && (errno == AGREP_ERROR)) {
fclose(infp);
return -1;
}
}
if (((LIMITOUTPUT > 0) && (LIMITOUTPUT <= num_of_matched)) ||
((LIMITPERFILE > 0) && (LIMITPERFILE <= num_of_matched - prev_num_of_matched))) break; /* done */
if ((totalret > 0) && FILENAMEONLY) break;
} /* while *p1 != NULL */
SetCurrentByteOffset = 0;
fclose(infp);
if (totalret > 0) { /* dirty solution: must handle part of agrep here */
if (COUNT && !FILEOUT && !SILENT) {
if(!NOFILENAME) fprintf(outfp, "%s: %d\n", CurrentFileName, totalret);
else fprintf(outfp, "%d\n", totalret);
}
else if (FILEOUT) {
file_out(realfilename);
}
}
return totalret;
}
/* Sets lastfilenumber that needs to be searched: rest must be discarded */
int
process_Y_option(num_files, num_days, fp)
int num_files, num_days;
FILE *fp;
{
CHAR arrayend[4];
last_Y_filenumber = 0;
if ((num_days <= 0) || (fp == NULL) || (timesindexsize <= 0)) return 0;
last_Y_filenumber = num_files;
if (num_days * sizeof(int) >= timesindexsize) return 0; /* everything will be within so many days */
if (fseek(fp, num_days*sizeof(int), 0) == -1) return -1;
fread(arrayend, 1, 4, fp);
if ((last_Y_filenumber = (arrayend[0] << 24) | (arrayend[1] << 16) | (arrayend[2] << 8) | arrayend[3]) > num_files) last_Y_filenumber = num_files;
if (last_Y_filenumber == 0) {
last_Y_filenumber = 1;
printf("Warning: no files modified in the last %d days were found in the index.\nSearching only the most recently modified file...\n", num_days);
}
return 0;
}
read_index(indexdir)
char indexdir[MAXNAME];
{
char *home;
char s[MAXNAME];
int ret;
if (indexdir[0] == '\0') {
if ((home = (char *)getenv("HOME")) == NULL) {
getcwd(indexdir, MAXNAME-1);
fprintf(stderr, "using working-directory '%s' to locate index\n", indexdir);
}
else strncpy(indexdir, home, MAXNAME);
}
ret = chdir(indexdir);
if (getcwd(INDEX_DIR, MAXNAME-1) == NULL) strcpy(INDEX_DIR, indexdir);
if (ret < 0) {
fprintf(stderr, "using working-directory '%s' to locate index\n", INDEX_DIR);
}
sprintf(s, "%s", INDEX_FILE);
indexfp = fopen(s, "r");
if(indexfp == NULL) {
fprintf(stderr, "can't open glimpse index-file %s/%s\n", INDEX_DIR, INDEX_FILE);
fprintf(stderr, "(use -H to give an index-directory or run 'glimpseindex' to make an index)\n");
return -1;
}
if (stat(s, &index_stat_buf) == -1) {
fprintf(stderr, "can't stat %s/%s\n", INDEX_DIR, s);
fclose(indexfp);
return -1;
}
sprintf(s, "%s", P_TABLE);
partfp = fopen(s, "r");
if(partfp == NULL) {
fprintf(stderr, "can't open glimpse partition-table %s/%s\n", INDEX_DIR, P_TABLE);
fprintf(stderr, "(use -H to specify an index-directory or run glimpseindex to make an index)\n");
fclose(indexfp);
return -1;
}
sprintf(s, "%s", DEF_TIME_FILE);
timesfp = fopen(s, "r");
sprintf(s, "%s.index", DEF_TIME_FILE);
timesindexfp = fopen(s, "r");
if (timesindexfp != NULL) {
struct stat st;
fstat(fileno(timesindexfp), &st);
timesindexsize = st.st_size;
}
/* Get options */
#if BG_DEBUG
debug = fopen(DEBUG_FILE, "w+");
if(debug == NULL) {
fprintf(stderr, "can't open file %s/%s, errno=%d\n", INDEX_DIR, DEBUG_FILE, errno);
return(-1);
}
#endif /*BG_DEBUG*/
fgets(indexnumberbuf, 256, indexfp);
if(strstr(indexnumberbuf, "1234567890")) IndexNumber = ON;
else IndexNumber = OFF;
fscanf(indexfp, "%%%d\n", &OneFilePerBlock);
if (OneFilePerBlock < 0) {
ByteLevelIndex = ON;
OneFilePerBlock = -OneFilePerBlock;
}
else if (OneFilePerBlock == 0) {
GNumpartitions = get_table(P_TABLE, p_table, MAX_PARTITION, 0);
}
fscanf(indexfp, "%%%d%s\n", &StructuredIndex, old_rdelim);
/* Set WHOLEFILESCOPE for do-it-yourself request processing at client */
WHOLEFILESCOPE = 1;
if (StructuredIndex <= 0) {
if (StructuredIndex == -2) {
RecordLevelIndex = 1;
strcpy(rdelim, old_rdelim);
rdelim_len = strlen(rdelim);
preprocess_delimiter(rdelim, rdelim_len, rdelim, &rdelim_len);
}
WHOLEFILESCOPE = 0;
StructuredIndex = 0;
PRINTATTR = 0; /* doesn't make sense: must not go into filter_output */
}
else if (-1 == (StructuredIndex = attr_load_names(ATTRIBUTE_FILE))) {
fprintf(stderr, "error in reading attribute file %s/%s\n", INDEX_DIR, ATTRIBUTE_FILE);
return(-1);
}
#if BG_DEBUG
fprintf(debug, "buf = %s OneFilePerBlock=%d StructuredIndex=%d\n", indexnumberbuf, OneFilePerBlock, StructuredIndex);
#endif /*BG_DEBUG*/
sprintf(s, "%s", MINI_FILE);
minifp = fopen(s, "r");
/* if (minifp==NULL && OneFilePerBlock) fprintf(stderr, "Can't open for reading: %s/%s --- cannot do very fast search\n", INDEX_DIR, MINI_FILE); */
if (OneFilePerBlock && glimpse_isserver && (minifp != NULL)) read_mini(indexfp, minifp);
read_filenames();
/* Once IndexNumber info is available */
set_indexable_char(indexable_char);
set_indexable_char(test_indexable_char);
set_special_char(indexable_char);
return 0;
}
#define CLEANUP \
{\
int q, k;\
if (timesfp != NULL) fclose(timesfp);\
if (timesindexfp != NULL) fclose(timesindexfp);\
if (indexfp != NULL) fclose(indexfp);\
if (partfp != NULL) fclose(partfp);\
if (minifp != NULL) fclose(minifp);\
if (nullfp != NULL) fclose(nullfp);\
indexfp = partfp = minifp = nullfp = NULL;\
if (ByteLevelIndex) {\
if (src_offset_table != NULL) for (k=0; k<OneFilePerBlock; k++) {\
free_list(&src_offset_table[k]);\
}\
for (q=0; q<MAXNUM_PAT; q++) {\
if (multi_dest_offset_table[q] != NULL) for (k=0; k<OneFilePerBlock; k++) {\
free_list(&multi_dest_offset_table[q][k]);\
}\
}\
}\
if (StructuredIndex) {\
attr_free_table();\
}\
destroy_filename_hashtable();\
my_free(SERV_HOST, MAXNAME);\
}
/* Called whenever we get SIGUSR2/SIGHUP (at the end of process_query()) */
reinitialize_server(argc, argv)
int argc;
char **argv;
{
int i, fd;
CLEANUP;
#if 0
init_filename_hashtable();
region_initialize();
indexfp = partfp = minifp = nullfp = NULL;
if ((nullfp = fopen("/dev/null", "w")) == NULL) {
return(-1);
}
src_offset_table = NULL;
for (i=0; i<MAXNUM_PAT; i++) multi_dest_offset_table[i] = NULL;
if (-1 == read_index(INDEX_DIR)) return(-1);
#if 0
#ifndef LOCK_UN
#define LOCK_UN 8
#endif
if ((fd = open(INDEX_DIR, O_RDONLY)) == -1) return -1;
flock(fd, LOCK_UN);
close(fd);
#endif
return 0;
#else
return execve(argv[0], argv, environ);
#endif
}
/* MUST CARE IF PIPE/SOCKET IS BROKEN! ALSO SIGUSR1 ([email protected]) => QUIT CURRENT REQUEST. */
int ignore_signal[32] = { 0,
0, 0, 1, 1, 1, 1, 1, 1, /* all the tracing stuff: since default action is to dump core */
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 0, 0 }; /* resource lost: since default action is to dump core */
/* S.t. sockets don't persist: they sometimes have a bad habit of doing so */
void
cleanup()
{
int i;
/* ^C in the middle of a client call */
if (svstderr != 2) {
close(2);
dup(svstderr);
}
fprintf(stderr, "server cleaning up...\n");
CLEANUP;
for (i=0; i<64; i++) close(i);
exit(3);
}
void reinitialize(s)
int s;
{
/* To force main-while loop call reinitialize_server() after do_select() */
glimpse_reinitialize = 1;
#ifdef __svr4__
/* Solaris 2.3 insists that you reset the signal handler */
(void)signal(s, reinitialize);
#endif
}
#define QUITREQUESTMSG "glimpseserver: aborting request...\n"
/* S.t. one request doesn't keep server occupied too long, when client already quits */
void quitrequest(s)
int s;
{
/*
* Don't write onto stderr, since 2 is duped to sockfd => can cause recursive signal!
* Also, don't print error message more than once for quitting one request. The
* server receives signals for EVERY write it attempts when it finds a match: I could
* not find a way to prevent it, but agrep/bitap.c/fill_buf() was fixed to limit it.
* -- bg on 16th Feb 1995
*/
if (!glimpse_clientdied && (s != SIGUSR1)) /* USR1 is a "friendly" cleanup message */
write(svstderr, QUITREQUESTMSG, strlen(QUITREQUESTMSG));
glimpse_clientdied = 1;
#ifdef __svr4__
/* Solaris 2.3 insists that you reset the signal handler */
(void)signal(s, quitrequest);
#endif
}
/* The client receives this signal when an output/input pipe is broken, etc. It simply exits from the current request */
void exitrequest()
{
glimpse_clientdied = 1;
}
main(argc, argv)
int argc;
char *argv[];
{
int ret = 0, tried = 0;
char indexdir[MAXNAME];
char **oldargv = argv;
int oldargc = argc;
#if CLIENTSERVER
int sockfd, newsockfd, clilen, len, clpid;
int clout;
#if USE_UNIXDOMAIN
struct sockaddr_un cli_addr, serv_addr;
#else /*USE_UNIXDOMAIN*/
struct sockaddr_in cli_addr, serv_addr;
struct hostent *hp;
#endif /*USE_UNIXDOMAIN*/
int cli_len;
int clargc;
char **clargv;
int clstdin, clstdout, clstderr;
int i;
char array[4];
char *p, c;
#endif /*CLIENTSERVER*/
int quitwhile;
#if ISO_CHAR_SET
setlocale(LC_ALL,""); /* support for 8bit character set: [email protected], [email protected] */
#endif
#if CLIENTSERVER && ISSERVER
glimpse_isserver = 1; /* I am the server */
#else /*CLIENTSERVER && ISSERVER*/
if (argc <= 1) {
usage(); /* Client nees at least 1 argument */
exit(1);
}
#endif /*CLIENTSERVER && ISSERVER*/
#define RETURNMAIN(val)\
{\
CLEANUP;\
if (val < 0) exit (2);\
else if (val == 0) exit (1);\
else exit (0);\
}
SERV_HOST = (CHAR *)my_malloc(MAXNAME);
#if !SYSCALLTESTING
/* once-only initialization */
init_filename_hashtable();
src_offset_table = NULL;
for (i=0; i<MAXNUM_PAT; i++) multi_dest_offset_table[i] = NULL;
#endif
gethostname(SERV_HOST, MAXNAME - 2);
SERV_PORT = DEF_SERV_PORT;
srand(getpid());
umask(077);
strcpy(&GProgname[0], argv[0]);
#if !SYSCALLTESTING
region_initialize();
#endif
indexfp = partfp = minifp = nullfp = NULL;
if ((nullfp = fopen("/dev/null", "w")) == NULL) {
fprintf(stderr, "%s: cannot open for writing: /dev/null, errno=%d\n", argv[0], errno);
RETURNMAIN(-1);
}
InterpretSpecial = ON;
GMAX_WORD_SIZE = MAXPAT;
#if CLIENTSERVER
#if !ISSERVER
/* Install signal handlers so that glimpse doesn't continue to run when pipes get broken, etc. */
if (((void (*)())-1 == signal(SIGPIPE, exitrequest))
#ifndef SCO
|| ((void (*)())-1 == signal(SIGURG, exitrequest))
#endif
)
{
/* Check for return values here since they ensure reliability */
fprintf(stderr, "glimpse: Unable to install signal-handlers.\n");
RETURNMAIN(-1);
}
/* Check if client has too many arguments: then it is surely running as agrep since I have < half those options! */
if (argc > MAX_ARGS) goto doityourself;
#endif /*!ISSERVER*/
#if !SYSCALLTESTING
while((--argc > 0) && (*++argv)[0] == '-' ) {
p = argv[0] + 1; /* ptr to first character after '-' */
c = *(argv[0]+1);
if (*p == '-') { /* cheesy hack to support --version and --help options */
if (*(p+1) == 'v') {
c = 'V';
} else if (*(p+1) == 'h') {
c = '?';
}
}
quitwhile = OFF;
while (!quitwhile && (*p != '\0')) {
switch(c) {
/* Look for -H option at server (only one that makes sense); if client has a -H, then it goes to doityourself */
case 'H' :
if (*(p + 1) == '\0') {/* space after - option */
if (argc <= 1) {
fprintf(stderr, "%s: a directory name must follow the -H option\n", GProgname);
RETURNMAIN(usageS());
}
argv ++;
strcpy(indexdir, argv[0]);
argc --;
}
else {
strcpy(indexdir, p+1);
}
quitwhile = ON;
break;
/* Recognized by both client and server */
case 'J' :
if (*(p + 1) == '\0') {/* space after - option */
if (argc <= 1) {
fprintf(stderr, "%s: the server host name must follow the -J option\n", GProgname);
#if ISSERVER
RETURNMAIN(usageS());
#else /*ISSERVER*/
RETURNMAIN(usage());
#endif /*ISSERVER*/
}
argv ++;
strcpy(SERV_HOST, argv[0]);
argc --;
}
else {
strcpy(SERV_HOST, p+1);
}
quitwhile = ON;
break;
/* Recognized by both client and server */
case 'K' :
if (*(p + 1) == '\0') {/* space after - option */
if (argc <= 1) {
fprintf(stderr, "%s: the server port must follow the -C option\n", GProgname);
#if ISSERVER
RETURNMAIN(usageS());
#else /*ISSERVER*/
RETURNMAIN(usage());
#endif /*ISSERVER*/
}
argv ++;
SERV_PORT = atoi(argv[0]);
argc --;
}
else {
SERV_PORT = atoi(p+1);
}
if ((SERV_PORT < MIN_SERV_PORT) || (SERV_PORT > MAX_SERV_PORT)) {
fprintf(stderr, "Bad server port %d: must be in [%d, %d]: using default %d\n",
SERV_PORT, MIN_SERV_PORT, MAX_SERV_PORT, DEF_SERV_PORT);
SERV_PORT = DEF_SERV_PORT;
}
quitwhile = ON;
break;
#if ISSERVER
#if SFS_COMPAT
case 'R' :
RemoteFiles = ON;
break;
case 'Z' :
/* No op */
break;
#endif
case 'V' :
printf("\nThis is glimpseindex version %s, %s.\n\n", GLIMPSE_VERSION, GLIMPSE_DATE);
RETURNMAIN(1);
case '?' :
RETURNMAIN(usageS());
/* server cannot recognize any other option */
default :
fprintf(stderr, "%s: server cannot recognize option: '%s'\n", GProgname, p);
RETURNMAIN(usageS());
#else /*ISSERVER*/
/* These have 1 argument each, so must do quitwhile */
case 'd' :
case 'e' :
case 'f' :
case 'k' :
case 'D' :
case 'F' :
case 'I' :
case 'L' :
case 'R' :
case 'S' :
case 'T' :
case 'Y' :
case 'p' :
if (argv[0][2] == '\0') {/* space after - option */
if(argc <= 1) {
fprintf(stderr, "%s: the '-%c' option must have an argument\n", GProgname, c);
RETURNMAIN(usage());
}
argv++;
argc--;
}
quitwhile = ON;
break;
/* These are illegal */
case 'm' :
case 'v' :
fprintf(stderr, "%s: illegal option: '-%c'\n", GProgname, c);
RETURNMAIN(usage());
/* They can't be patterns and filenames since they start with a -, these don't have arguments */
case '!' :
case 'a' :
case 'b' :
case 'c' :
case 'h' :
case 'i' :
case 'j' :
case 'l' :
case 'n' :
case 'o' :
case 'q' :
case 'r' :
case 's' :
case 't' :
case 'u' :
case 'g' :
case 'w' :
case 'x' :
case 'y' :
case 'z' :
case 'A' :
case 'B' :
case 'E' :
case 'G' :
case 'M' :
case 'N' :
case 'O' :
case 'P' :
case 'Q' :
case 'U' :
case 'W' :
case 'X' :
case 'Z' :
break;
case 'C':
CONTACT_SERVER = 1;
break;
case 'V' :
printf("\nThis is glimpse version %s, %s.\n\n", GLIMPSE_VERSION, GLIMPSE_DATE);
RETURNMAIN(1);
case '?':
RETURNMAIN(usage());
default :
if (isdigit(c)) quitwhile = ON;
else {
fprintf(stderr, "%s: illegal option: '-%c'\n", GProgname, c);
RETURNMAIN(usage());
}
break;
#endif /*ISSERVER*/
} /* switch(c) */
p ++;
c = *p;
}
}
#else
CONTACT_SERVER = 1;
argc=0;
#endif
#if !ISSERVER
/* Next arg must be the pattern: Check if the user wants to run the client as agrep, or doesn't want to contact the server */
if ((argc > 1) || (!CONTACT_SERVER)) goto doityourself;
#endif /*!ISSERVER*/
argv = oldargv;
argc = oldargc;
#endif /*CLIENTSERVER*/
#if ISSERVER && CLIENTSERVER
if (-1 == read_index(indexdir)) RETURNMAIN(ret);
/* Install signal handlers so that glimpseserver doesn't continue to run when sockets get broken, etc. */
for (i=0; i<32; i++)
if (ignore_signal[i]) signal(i, SIG_IGN);
signal(SIGHUP, cleanup);
signal(SIGINT, cleanup);
if (((void (*)())-1 == signal(SIGPIPE, quitrequest)) ||
((void (*)())-1 == signal(SIGUSR1, quitrequest)) ||
#ifndef SCO
((void (*)())-1 == signal(SIGURG, quitrequest)) ||
#endif
((void (*)())-1 == signal(SIGUSR2, reinitialize)) ||
((void (*)())-1 == signal(SIGHUP, reinitialize))) {