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/* rsyslog testbench tool to mangle .qi files
*
* Copyright (C) 2016 by Rainer Gerhards
* Released uner ASL 2.0
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <string.h>
static int debug = 0;
void
usage(void)
{
fprintf(stderr, "mangle_qi -d -q <.qi-file>\n"
"-d enables debug messages\n");
exit(1);
}
void
processQI(FILE *const __restrict__ qi)
{
char lnbuf[4096];
char propname[64];
int rectype;
int length;
int queuesize;
int i;
int c;
fgets(lnbuf, sizeof(lnbuf), qi);
fputs(lnbuf, stdout);
/* we now read the queue size line */
/* note: this is quick and dirty, no error checks
* are done!
*/
fgetc(qi); /* skip '+' */
for(i = 0 ; (c = fgetc(qi)) != ':' ; ++i) {
propname[i] = c;
}
propname[i] = '\0';
if(strcmp(propname, "iQueueSize")) {
fprintf(stderr, ".qi file format unknown: line 2 does "
"not contain iQueueSize property, instead '%s'\n",
propname);
exit(1);
}
rectype = 0;
for(c = fgetc(qi) ; isdigit(c) ; c = fgetc(qi))
rectype = rectype * 10 + c - '0';
length = 0;
for(c = fgetc(qi) ; isdigit(c) ; c = fgetc(qi))
length = length * 10 + c - '0';
queuesize = 0;
for(c = fgetc(qi) ; isdigit(c) ; c = fgetc(qi))
queuesize = queuesize * 10 + c - '0';
int maxval_for_length = 10;
for(i = 1 ; i < length ; ++i)
maxval_for_length *= 10; /* simulate int-exp() */
if(debug) {
fprintf(stderr, "rectype: %d\n", rectype);
fprintf(stderr, "length: %d\n", length);
fprintf(stderr, "queuesize: %d\n", queuesize);
fprintf(stderr, "maxval_for_length: %d\n", maxval_for_length);
}
queuesize += 1; /* fake invalid queue size */
if(queuesize > maxval_for_length)
++length;
/* ready to go, write mangled queue size */
printf("+%s:%d:%d:%d:", propname, rectype, length, queuesize);
/* copy rest of file */
while((c = fgetc(qi)) != EOF)
putchar(c);
}
int
main(int argc, char *argv[])
{
char *qifile = NULL;
FILE *qi;
int opt;
while((opt = getopt(argc, argv, "dq:")) != -1) {
switch (opt) {
case 'q': qifile = optarg;
break;
case 'd': debug = 1;
break;
default: usage();
break;
}
}
if(qifile == NULL) {
fprintf(stderr, "ERROR: -q option MUST be specified\n");
usage();
}
if((qi = fopen(qifile, "r")) == NULL) {
perror(qifile);
exit(1);
}
processQI(qi);
return 0;
}
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