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	util.c - lchat - A line oriented chat front end for ii.
	git clone git://git.suckless.org/lchat
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	---
	util.c (1700B)
	---
	1 /*
	2 * Copyright (c) 2018-2023 Jan Klemkow <[email protected]>
	3 *
	4 * Permission to use, copy, modify, and distribute this software for any
	5 * purpose with or without fee is hereby granted, provided that the above
	6 * copyright notice and this permission notice appear in all copies.
	7 *
	8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANT…
	9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE F…
	11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT …
	14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15 */
	16
	17 #include <stdarg.h>
	18 #include <stdbool.h>
	19 #include <stdio.h>
	20 #include <stdlib.h>
	21 #include <string.h>
	22 #include <unistd.h>
	23
	24 void
	25 die(const char *fmt, ...)
	26 {
	27 va_list ap;
	28
	29 va_start(ap, fmt);
	30 vfprintf(stderr, fmt, ap);
	31 va_end(ap);
	32
	33 if (fmt[0] && fmt[strlen(fmt)-1] == ':') {
	34 fputc(' ', stderr);
	35 perror(NULL);
	36 } else {
	37 fputc('\n', stderr);
	38 }
	39
	40 exit(EXIT_FAILURE);
	41 }
	42
	43 bool
	44 bell_match(const char str, const char regex_file)
	45 {
	46 FILE *fh = NULL;
	47 char cmd[BUFSIZ];
	48
	49 if (access(regex_file, R_OK) == -1)
	50 return true;
	51
	52 snprintf(cmd, sizeof cmd, "exec grep -qf %s", regex_file);
	53
	54 if ((fh = popen(cmd, "w")) == NULL)
	55 die("popen:");
	56
	57 if (fputs(str, fh) == EOF)
	58 die("fputs:");
	59
	60 if (pclose(fh) == 0)
	61 return true;
	62
	63 return false;
	64 }
	65
	66 void
	67 set_title(const char term, char title)
	68 {
	69 if (strncmp(term, "screen", 6) == 0)
	70 printf("\033k%s\033\\", title);
	71 else
	72 printf("\033]0;%s\a", title);
	73 }