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/* This program expands the input file several times. This
* is done in order to obtain large (and maybe huge) files for
* testing. Note that the input file is stored in memory. It's
* last line must properly be terminated.
* Max input line size is 10K.
*
* command line options:
* -i file to be used for input (else stdin)
* -o file to be used for output (else stdout)
* -c number of times the file is to be copied
* -n add line numbers (default: off)
* -w wait nbr of microsecs between batches
* -W number of file lines to generate in a batch
* This is useful only if -w is specified as well,
* default is 1000.
*
* Copyright 2010 Rainer Gerhards and Adiscon GmbH.
*
* This file is part of rsyslog.
*
* Rsyslog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rsyslog is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Rsyslog. If not, see <http://www.gnu.org/licenses/>.
*
* A copy of the GPL can be found in the file "COPYING" in this distribution.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
/* input file is stored in a single-linked list */
struct line {
struct line *next;
char *ln;
} *root, *tail;
static FILE *fpIn;
static FILE *fpOut;
static long long nCopies = 1;
static int linenbrs = 0;
static int waitusecs = 0;
static int batchsize = 1000;
/* read the input file and create in-memory representation
*/
static inline void
readFile()
{
char *r;
char lnBuf[10240];
struct line *node;
root = tail = NULL;
r = fgets(lnBuf, sizeof(lnBuf), fpIn);
while(r != NULL) {
node = malloc(sizeof(struct line));
if(node == NULL) {
perror("malloc node");
exit(1);
}
node->next = NULL;
node->ln = strdup(lnBuf);
if(node->ln == NULL) {
perror("malloc node");
exit(1);
}
if(tail == NULL) {
tail = root = node;
} else {
tail->next = node;
tail = node;
}
r = fgets(lnBuf, sizeof(lnBuf), fpIn);
}
if(!feof(fpIn)) {
perror("fgets");
fprintf(stderr, "end of read loop, but not end of file!");
exit(1);
}
}
static void
genCopies()
{
long long i;
long long unsigned lnnbr;
struct line *node;
lnnbr = 1;
for(i = 0 ; i < nCopies ; ++i) {
if(i % 10000 == 0)
fprintf(stderr, "copyrun %d\n", i);
if(waitusecs && (i % batchsize == 0)) {
usleep(waitusecs);
}
for(node = root ; node != NULL ; node = node->next) {
if(linenbrs)
fprintf(fpOut, "%12.12llu:%s", lnnbr, node->ln);
else
fprintf(fpOut, "%s", node->ln);
++lnnbr;
}
}
}
void main(int argc, char *argv[])
{
int opt;
fpIn = stdin;
fpOut = stdout;
while((opt = getopt(argc, argv, "i:o:c:nw:W:")) != -1) {
switch (opt) {
case 'i': /* input file */
if((fpIn = fopen(optarg, "r")) == NULL) {
perror(optarg);
exit(1);
}
break;
case 'o': /* output file */
if((fpOut = fopen(optarg, "w")) == NULL) {
perror(optarg);
exit(1);
}
break;
case 'c':
nCopies = atoll(optarg);
break;
case 'n':
linenbrs = 1;
break;
case 'w':
waitusecs = atoi(optarg);
break;
case 'W':
batchsize = atoi(optarg);
break;
default: printf("invalid option '%c' or value missing - terminating...\n", opt);
exit (1);
break;
}
}
readFile();
genCopies();
}
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