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midicat(1): use err(3) everywhere

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This is consistent with style(9) and makes the program shorter, too.

Tweaked by ratchov@.

Link: https://marc.info/?l=openbsd-tech&m=166982129428027&w=2

ok millert@ kn@ ratchov@
This commit is contained in:
cheloha 2022-12-02 22:36:34 +00:00
parent 7671136a57
commit dbbc8c3f84
1 changed files with 19 additions and 33 deletions
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52
usr.bin/midicat/midicat.c
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@ -1,4 +1,4 @@
/* $OpenBSD: midicat.c,v 1.6 2022/12/02 22:29:59 cheloha Exp $ */
/* $OpenBSD: midicat.c,v 1.7 2022/12/02 22:36:34 cheloha Exp $ */
/*
* Copyright (c) 2015 Alexandre Ratchov <alex@caoua.org>
*
@ -49,10 +49,8 @@ main(int argc, char **argv)
port0 = optarg;
else if (port1 == NULL)
port1 = optarg;
else {
fputs("too many -q options\n", stderr);
return 1;
}
else
errx(1, "too many -q options");
break;
case 'i':
ifile = optarg;
@ -71,16 +69,12 @@ main(int argc, char **argv)
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;
}
if (ifile != NULL && ofile != NULL)
errx(1, "-i and -o are exclusive");
/* 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 (port1 != NULL && !(ifile == NULL && ofile == NULL))
errx(1, "too many -q options");
/* if there're neither files nor ports, then we've nothing to do */
if (port0 == NULL && ifile == NULL && ofile == NULL)
@ -97,10 +91,8 @@ main(int argc, char **argv)
ifd = STDIN_FILENO;
} else {
ifd = open(ifile, O_RDONLY);
if (ifd == -1) {
perror(ifile);
return 1;
}
if (ifd == -1)
err(1, "%s", ifile);
}
} else if (ofile) {
if (strcmp(ofile, "-") == 0) {
@ -108,10 +100,8 @@ main(int argc, char **argv)
ofd = STDOUT_FILENO;
} else {
ofd = open(ofile, O_WRONLY | O_CREAT | O_TRUNC, 0666);
if (ofd == -1) {
perror(ofile);
return 1;
}
if (ofd == -1)
err(1, "%s", ofile);
}
}
@ -125,20 +115,16 @@ main(int argc, char **argv)
else
mode = MIO_IN;
ih = mio_open(port0, mode, 0);
if (ih == NULL) {
fprintf(stderr, "%s: couldn't open port\n", port0);
return 1;
}
if (ih == NULL)
errx(1, "%s: couldn't open port", port0);
/* 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 (oh == NULL)
errx(1, "%s: couldn't open port", port1);
}
if (pledge("stdio", NULL) == -1)
@ -151,26 +137,26 @@ main(int argc, char **argv)
if (len == 0)
break;
if (len == -1) {
perror("stdin");
warn("%s", ifile);
break;
}
} else {
len = mio_read(ih, buf, sizeof(buf));
if (len == 0) {
fprintf(stderr, "%s: disconnected\n", port0);
warnx("%s: disconnected", port0);
break;
}
}
if (ofile != NULL) {
n = write(ofd, buf, len);
if (n != len) {
fprintf(stderr, "%s: short write\n", ofile);
warn("%s: short write", ofile);
break;
}
} else {
n = mio_write(oh, buf, len);
if (n != len) {
fprintf(stderr, "%s: disconnected\n", port1);
warnx("%s: disconnected", port1);
break;
}
}