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// SPDX-License-Identifier: MIT
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "msg.h"
// Print message to stderr and exit with "code".
// Example: fatal(6, "could not compile regexp '%s'\n", regex_str);
void fatal(int code, char* fmt, ...)
{
char* red = "";
char* reset = "";
if (isatty(fileno(stderr))) {
red = "\033[31m";
reset = "\033[0m";
}
char fmt2[100];
snprintf(fmt2, sizeof(fmt2), "%sfatal: %s%s", red, fmt, reset);
va_list args;
va_start(args, fmt); // yes fmt, NOT fmt2!
vfprintf(stderr, fmt2, args);
va_end(args);
exit(code);
}
// Print a yellow warning message to stderr.
int warn(const char* fmt, ...)
{
int ret = 0;
char* yellow = "";
char* reset = "";
if (isatty(fileno(stderr))) {
yellow = "\033[33m";
reset = "\033[0m";
}
char fmt2[100];
snprintf(fmt2, sizeof(fmt2), "%s%s%s", yellow, fmt, reset);
va_list args;
va_start(args, fmt); // yes fmt, NOT fmt2!
ret = vfprintf(stderr, fmt2, args);
va_end(args);
return ret;
}
term_kill_tuple_t parse_term_kill_tuple(char* opt, char* optarg, long upper_limit, int exitcode)
{
term_kill_tuple_t tuple = { 0 };
int n;
n = sscanf(optarg, "%ld,%ld", &tuple.term, &tuple.kill);
if (n == 0) {
fatal(exitcode, "%s: could not parse '%s'\n", opt, optarg);
}
if (tuple.term == 0) {
fatal(exitcode, "%s: zero sigterm value in '%s'\n", opt, optarg);
}
if (tuple.term < 0) {
fatal(exitcode, "%s: negative sigterm value in '%s'\n", opt, optarg);
}
if (tuple.term > upper_limit) {
fatal(exitcode, "%s: sigterm value in '%s' exceeds limit %ld\n",
opt, optarg, upper_limit);
}
// User passed only "term" value
if (n == 1) {
tuple.kill = tuple.term / 2;
return tuple;
}
// User passed "term,kill" values
if (tuple.kill == 0) {
fatal(exitcode, "%s: zero sigkill value in '%s'\n", opt, optarg);
}
if (tuple.kill < 0) {
fatal(exitcode, "%s: negative sigkill value in '%s'\n", opt, optarg);
}
if (tuple.kill > tuple.term) {
fatal(exitcode, "%s: sigkill value exceeds sigterm value in '%s'\n",
opt, optarg);
}
return tuple;
}
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