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author | Steve Bennett <steveb@workware.net.au> | 2023-11-02 10:01:34 +1000 |
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committer | Steve Bennett <steveb@workware.net.au> | 2024-02-04 10:08:06 +1000 |
commit | dd22498a18f17f8b9f2c080f21f0310bf8c1880a (patch) | |
tree | 4cb1958335624469396433a851129fa4df695811 /openpty.c | |
parent | 50e3667abf9fe4c9ecafb96553deaee15de37a03 (diff) | |
download | jimtcl-dd22498a18f17f8b9f2c080f21f0310bf8c1880a.zip jimtcl-dd22498a18f17f8b9f2c080f21f0310bf8c1880a.tar.gz jimtcl-dd22498a18f17f8b9f2c080f21f0310bf8c1880a.tar.bz2 |
aio: implement openpty.c locally
To avoid linking with -lutil if possible
Signed-off-by: Steve Bennett <steveb@workware.net.au>
Diffstat (limited to 'openpty.c')
-rw-r--r-- | openpty.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/openpty.c b/openpty.c new file mode 100644 index 0000000..dab65e1 --- /dev/null +++ b/openpty.c @@ -0,0 +1,70 @@ +/* + * From musl: http://www.musl-libc.org/ +---------------------------------------------------------------------- +Copyright © 2005-2020 Rich Felker, et al. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +---------------------------------------------------------------------- +*/ +#include <stdlib.h> +#include <fcntl.h> +#include <unistd.h> +#include <termios.h> +#include <sys/ioctl.h> +#include <signal.h> +#include <stdio.h> + +/* We implement our own openpty() on Linux so that we don't need to link against libutil */ + +int openpty(int *pm, int *ps, char name[20], const struct termios *tio, const struct winsize *ws) +{ + sig_t old_signal; + int ret = -1; + int m = posix_openpt(O_RDWR|O_NOCTTY); + if (m < 0) return -1; + + old_signal = signal(SIGCHLD, SIG_DFL); + if (grantpt(m) >= 0) { + if (unlockpt(m) >= 0) { + char buf[20]; + int s; + + if (!name) name = buf; + snprintf(name, sizeof(buf), "%s", ptsname(m)); + if ((s = open(name, O_RDWR|O_NOCTTY)) >= 0) { + if (tio) tcsetattr(s, TCSANOW, tio); + if (ws) ioctl(s, TIOCSWINSZ, ws); + + *pm = m; + *ps = s; + + ret = 0; + + return 0; + } + } + } + signal(SIGCHLD, old_signal); + + if (ret) { + close(m); + } + return ret; +} |