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Only set use tcsetattr() on TTYs for KISS TNCs

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Fix patty_kiss_tnc_new_fd() to only attempt tcgetattr()/tcsetattr() on
file descriptors for whom isatty() is true, allowing files and sockets
to once again be used
This commit is contained in:
XANTRONIX Development 2020-07-30 01:34:43 -04:00 • committed by XANTRONIX Industrial
parent e10ce6b8e1
commit 09df948871
1 changed files with 9 additions and 7 deletions
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16
src/kiss.c
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@ -52,16 +52,18 @@ patty_kiss_tnc *patty_kiss_tnc_new_fd(int fd) {
goto error_malloc_buf; goto error_malloc_buf;
} }
if (tcgetattr(fd, &tnc->attrs) < 0) { if (isatty(fd)) {
goto error_tcgetattr; if (tcgetattr(fd, &tnc->attrs) < 0) {
} goto error_tcgetattr;
}
memcpy(&tnc->attrs_old, &tnc->attrs, sizeof(tnc->attrs_old)); memcpy(&tnc->attrs_old, &tnc->attrs, sizeof(tnc->attrs_old));
cfmakeraw(&tnc->attrs); cfmakeraw(&tnc->attrs);
if (tcsetattr(fd, TCSANOW, &tnc->attrs) < 0) { if (tcsetattr(fd, TCSANOW, &tnc->attrs) < 0) {
goto error_tcsetattr; goto error_tcsetattr;
}
} }
tnc->fd = fd; tnc->fd = fd;