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/* $OpenBSD: midicat.c,v 1.6 2022/12/02 22:29:59 cheloha Exp $ */
/*
* Copyright (c) 2015 Alexandre Ratchov <alex@caoua.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <err.h>
#include <fcntl.h>
#include <sndio.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
void __dead usage(void);
int
main(int argc, char **argv)
{
#define MIDI_BUFSZ 1024
unsigned char buf[MIDI_BUFSZ];
struct mio_hdl *ih, *oh;
char *port0, *port1, *ifile, *ofile;
int ifd, ofd;
int dump, c, i, len, n, sep, mode;
dump = 0;
port0 = port1 = ifile = ofile = NULL;
ih = oh = NULL;
ifd = ofd = -1;
while ((c = getopt(argc, argv, "di:o:q:")) != -1) {
switch (c) {
case 'd':
dump = 1;
break;
case 'q':
if (port0 == NULL)
port0 = optarg;
else if (port1 == NULL)
port1 = optarg;
else {
fputs("too many -q options\n", stderr);
return 1;
}
break;
case 'i':
ifile = optarg;
break;
case 'o':
ofile = optarg;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc != 0)
usage();
/* we don't support more than one data flow */
if (ifile != NULL && ofile != NULL) {
fputs("-i and -o are exclusive\n", stderr);
return 1;
}
/* second port makes sense only for port-to-port transfers */
if (port1 != NULL && !(ifile == NULL && ofile == NULL)) {
fputs("too many -q options\n", stderr);
return 1;
}
/* if there're neither files nor ports, then we've nothing to do */
if (port0 == NULL && ifile == NULL && ofile == NULL)
usage();
/* if no port specified, use default one */
if (port0 == NULL)
port0 = MIO_PORTANY;
/* open input or output file (if any) */
if (ifile) {
if (strcmp(ifile, "-") == 0) {
ifile = "stdin";
ifd = STDIN_FILENO;
} else {
ifd = open(ifile, O_RDONLY);
if (ifd == -1) {
perror(ifile);
return 1;
}
}
} else if (ofile) {
if (strcmp(ofile, "-") == 0) {
ofile = "stdout";
ofd = STDOUT_FILENO;
} else {
ofd = open(ofile, O_WRONLY | O_CREAT | O_TRUNC, 0666);
if (ofd == -1) {
perror(ofile);
return 1;
}
}
}
/* open first port for input and output (if output needed) */
if (ofile)
mode = MIO_IN;
else if (ifile)
mode = MIO_OUT;
else if (port1 == NULL)
mode = MIO_IN | MIO_OUT;
else
mode = MIO_IN;
ih = mio_open(port0, mode, 0);
if (ih == NULL) {
fprintf(stderr, "%s: couldn't open port\n", port0);
return 1;
}
/* open second port, output only */
if (port1 == NULL)
oh = ih;
else {
oh = mio_open(port1, MIO_OUT, 0);
if (oh == NULL) {
fprintf(stderr, "%s: couldn't open port\n", port1);
exit(1);
}
}
if (pledge("stdio", NULL) == -1)
err(1, "pledge");
/* transfer until end-of-file or error */
for (;;) {
if (ifile != NULL) {
len = read(ifd, buf, sizeof(buf));
if (len == 0)
break;
if (len == -1) {
perror("stdin");
break;
}
} else {
len = mio_read(ih, buf, sizeof(buf));
if (len == 0) {
fprintf(stderr, "%s: disconnected\n", port0);
break;
}
}
if (ofile != NULL) {
n = write(ofd, buf, len);
if (n != len) {
fprintf(stderr, "%s: short write\n", ofile);
break;
}
} else {
n = mio_write(oh, buf, len);
if (n != len) {
fprintf(stderr, "%s: disconnected\n", port1);
break;
}
}
if (dump) {
for (i = 0; i < len; i++) {
sep = (i % 16 == 15 || i == len - 1) ?
'\n' : ' ';
fprintf(stderr, "%02x%c", buf[i], sep);
}
}
}
/* clean-up */
if (port0)
mio_close(ih);
if (port1)
mio_close(oh);
if (ifile)
close(ifd);
if (ofile)
close(ofd);
return 0;
}
void __dead
usage(void)
{
fprintf(stderr, "usage: midicat [-d] [-i in-file] [-o out-file] "
"[-q in-port] [-q out-port]\n");
exit(1);
}
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