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/* This file is part of Mailfromd testsuite.
Copyright (C) 2022-2025 Sergey Poznyakoff
This program 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, or (at your option)
any later version.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */
/*
NAME
numck - verify tos traces
SYNOPSIS
numck [-c STRING] [-n LINES] [-p] [FILE]
DESCRIPTION
Reads tos trace from standard input or FILE and compares each
number read with the first number. If the two differ, numck
prints the number of offending line, the two numbers and exits
with code 1.
The input is supposed to be produced by calls to _reg(REG_TOS)
inserted in the appropriate places of the code. Apart from
numeric lines, it can contain the following:
* Empty lines
These are ignored
* Comments
Lines beginning with a #, except as followed by + or - sign.
* Pragmatic comments
Lines beginning with a #, followed by + or - sign and integer
number. Such lines change expected tos value by adding the integer
with the appropriate sign to the original expectation value. For
example:
100
#-3
After the pragmatic comment above, the expected value becomes 97.
OPTIONS
-c STRING
Treat STRING at the beginning of line as comment starter, same
as #.
-n LINES
Sets the number of expected input lines. This number includes
comments and empty lines. If the number of lines actually read
doesn't match that value, an error message is printed and the
program returns status code 1.
-p
Reproduce comment lines on output.
EXIT CODES
0 Success.
1 Numeric value read from input doesn't match the expected
value, or total number of lines processed doesn't match
the limit set by the -n option.
64 (EX_USAGE)
Command line usage error.
65 (EX_DATAERR)
Input is malformed.
66 (EX_NOINPUT)
Cannot open input file.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <unistd.h>
#include <sysexits.h>
enum {
EX_DIFFER = 1,
};
int
main(int argc, char **argv)
{
char buf[BUFSIZ];
long val;
long lineno = 0;
long expected_lines = -1;
int print_comment = 0;
char *comment_start = NULL;
size_t comment_start_len = 0;
int status = EX_OK;
int init = 0;
int c;
char *p;
while ((c = getopt(argc, argv, "n:c:p")) != EOF) {
switch (c) {
case 'c':
comment_start = optarg;
comment_start_len = strlen(comment_start);
break;
case 'n':
errno = 0;
expected_lines = strtol(optarg, &p, 10);
if (errno || *p || expected_lines < 0) {
fprintf(stderr, "bad number of expected lines given\n");
return EX_USAGE;
}
break;
case 'p':
print_comment = 1;
break;
default:
return EX_USAGE;
}
}
switch (argc - optind) {
case 0:
break;
case 1:
if (!freopen(argv[optind], "r", stdin)) {
perror(argv[optind]);
return EX_NOINPUT;
}
break;
default:
fprintf(stderr, "too many arguments\n");
return EX_USAGE;
}
while (fgets(buf, sizeof buf, stdin)) {
long d;
size_t len;
lineno++;
len = strlen(buf);
if (buf[len-1] != '\n') {
int c;
fprintf(stderr, "%ld: line too long\n", lineno);
while ((c = getchar()) != EOF && c != '\n')
;
status = EX_DATAERR;
continue;
}
for (len--; len > 0 && isspace(buf[len-1]); len--)
;
if (len == 0)
continue;
buf[len] = 0;
if (buf[0] == '#') {
if (strchr("+-", buf[1])) {
errno = 0;
d = strtol(buf+1, &p, 10);
if (errno || *p) {
fprintf(stderr, "%ld: invalid offset\n",
lineno);
status = EX_DATAERR;
}
val += d;
}
if (print_comment)
printf("%s\n", buf);
continue;
} else if (comment_start && len >= comment_start_len &&
memcmp(buf, comment_start, comment_start_len) == 0) {
if (print_comment)
printf("%s\n", buf);
continue;
}
errno = 0;
d = strtol(buf, &p, 10);
if (errno || *p) {
fprintf(stderr, "%ld: unrecognized line\n", lineno);
status = EX_DATAERR;
continue;
}
if (!init) {
val = d;
init = 1;
} else if (d != val) {
fprintf(stderr, "%ld: %ld != %ld\n", lineno, val, d);
return EX_DIFFER;
}
}
if (expected_lines != -1 && lineno != expected_lines) {
fprintf(stderr, "expected %ld lines, but read %ld\n",
expected_lines, lineno);
status = EX_DIFFER;
}
return status;
}
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