mirror of
https://github.com/jart/cosmopolitan.git
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2fc507c98f
* modelines: tw -> sw shiftwidth, not textwidth. * space-surround modelines * fix irregular modelines * Fix modeline in titlegen.c
92 lines
3.9 KiB
C
92 lines
3.9 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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│ vi: set noet ft=c ts=8 sw=8 fenc=utf-8 :vi │
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╚──────────────────────────────────────────────────────────────────────────────╝
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│ │
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│ Musl Libc │
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│ Copyright © 2005-2014 Rich Felker, et al. │
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│ │
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│ Permission is hereby granted, free of charge, to any person obtaining │
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│ a copy of this software and associated documentation files (the │
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│ "Software"), to deal in the Software without restriction, including │
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│ without limitation the rights to use, copy, modify, merge, publish, │
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│ distribute, sublicense, and/or sell copies of the Software, and to │
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│ permit persons to whom the Software is furnished to do so, subject to │
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│ the following conditions: │
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│ │
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│ The above copyright notice and this permission notice shall be │
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│ included in all copies or substantial portions of the Software. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
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│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
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│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
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│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
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│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
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│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
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│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
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│ │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/weirdtypes.h"
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#include "libc/calls/struct/sigset.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/calls/struct/sigset.h"
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#include "libc/thread/thread.h"
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#include "libc/calls/calls.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/runtime/runtime.h"
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#include "libc/errno.h"
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#include "libc/calls/termios.h"
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asm(".ident\t\"\\n\\n\
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Musl libc (MIT License)\\n\
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Copyright 2005-2014 Rich Felker, et. al.\"");
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asm(".include \"libc/disclaimer.inc\"");
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int forkpty(int *pm, char *name, const struct termios *tio, const struct winsize *ws)
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{
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int m, s, ec=0, p[2], cs;
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pid_t pid=-1;
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sigset_t set, oldset;
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if (openpty(&m, &s, name, tio, ws) < 0) return -1;
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sigfillset(&set);
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pthread_sigmask(SIG_BLOCK, &set, &oldset);
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pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
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if (pipe2(p, O_CLOEXEC)) {
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close(s);
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goto out;
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}
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pid = fork();
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if (!pid) {
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close(m);
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close(p[0]);
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if (login_tty(s)) {
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write(p[1], &errno, sizeof errno);
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_exit(127);
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}
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close(p[1]);
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pthread_setcancelstate(cs, 0);
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pthread_sigmask(SIG_SETMASK, &oldset, 0);
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return 0;
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}
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close(s);
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close(p[1]);
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if (read(p[0], &ec, sizeof ec) > 0) {
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int status;
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waitpid(pid, &status, 0);
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pid = -1;
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errno = ec;
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}
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close(p[0]);
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out:
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if (pid > 0) *pm = m;
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else close(m);
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pthread_setcancelstate(cs, 0);
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pthread_sigmask(SIG_SETMASK, &oldset, 0);
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return pid;
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}
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