diff options
| author | June McEnroe <june@causal.agency> | 2018-05-13 15:05:42 -0400 |
|---|---|---|
| committer | June McEnroe <june@causal.agency> | 2018-05-13 15:05:42 -0400 |
| commit | d67d19fe7f899dd8bd48ea68cbe8dff926f31956 (patch) | |
| tree | f36925106a48fed0f644d4113468e5534e8c4b15 /bin/modem.c | |
| parent | Add modem (diff) | |
| download | src-d67d19fe7f899dd8bd48ea68cbe8dff926f31956.tar.gz src-d67d19fe7f899dd8bd48ea68cbe8dff926f31956.zip | |
Clean up modem loop
Diffstat (limited to 'bin/modem.c')
| -rw-r--r-- | bin/modem.c | 21 |
1 files changed, 7 insertions, 14 deletions
diff --git a/bin/modem.c b/bin/modem.c index 47a4ddaf..4b5e8eb2 100644 --- a/bin/modem.c +++ b/bin/modem.c @@ -65,30 +65,22 @@ int main(int argc, char *argv[]) { err(EX_NOINPUT, "%s", argv[1]); } - for (;;) { - usleep(8 * 1000000 / BAUD_RATE); - - struct pollfd fds[2] = { - { .events = POLLIN, .fd = STDIN_FILENO }, - { .events = POLLIN, .fd = pty }, - }; - int n = poll(fds, 2, -1); - if (n < 0) err(EX_IOERR, "poll"); - + char c; + struct pollfd fds[2] = { + { .events = POLLIN, .fd = STDIN_FILENO }, + { .events = POLLIN, .fd = pty }, + }; + while (usleep(8 * 1000000 / BAUD_RATE), 0 < poll(fds, 2, -1)) { if (fds[0].revents) { - char c; ssize_t size = read(STDIN_FILENO, &c, 1); if (size < 0) err(EX_IOERR, "read(%d)", STDIN_FILENO); - size = write(pty, &c, 1); if (size < 0) err(EX_IOERR, "write(%d)", pty); } if (fds[1].revents) { - char c; ssize_t size = read(pty, &c, 1); if (size < 0) err(EX_IOERR, "read(%d)", pty); - size = write(STDOUT_FILENO, &c, 1); if (size < 0) err(EX_IOERR, "write(%d)", STDOUT_FILENO); } @@ -98,4 +90,5 @@ int main(int argc, char *argv[]) { if (dead < 0) err(EX_OSERR, "waitpid"); if (dead) return WIFEXITED(status) ? WEXITSTATUS(status) : EX_SOFTWARE; } + err(EX_IOERR, "poll"); } |