/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│ │vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│ ╞══════════════════════════════════════════════════════════════════════════════╡ │ Copyright 2020 Justine Alexandra Roberts Tunney │ │ │ │ Permission to use, copy, modify, and/or distribute this software for │ │ any purpose with or without fee is hereby granted, provided that the │ │ above copyright notice and this permission notice appear in all copies. │ │ │ │ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │ │ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │ │ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │ │ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │ │ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │ │ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │ │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │ │ PERFORMANCE OF THIS SOFTWARE. │ ╚─────────────────────────────────────────────────────────────────────────────*/ #include "libc/bits/pushpop.h" #include "libc/calls/hefty/internal.h" #include "libc/calls/hefty/spawn.h" #include "libc/dce.h" #include "libc/sysv/consts/fileno.h" #include "libc/sysv/errfuns.h" /** * Launches program, e.g. * * char buf[2]; * int ws, pid, fds[3] = {-1, -1, STDERR_FILENO}; * CHECK_NE(-1, (pid = spawnve(0, fds, commandv("ssh"), * (char *const[]){"ssh", hostname, "cat", 0}, * environ))); * CHECK_EQ(+2, write(fds[0], "hi", 2)); * CHECK_NE(-1, close(fds[0])); * CHECK_EQ(+2, read(fds[1], buf, 2))); * CHECK_NE(-1, close(fds[1])); * CHECK_EQ(+0, memcmp(buf, "hi", 2))); * CHECK_NE(-1, waitpid(pid, &ws, 0)); * CHECK_EQ(+0, WEXITSTATUS(ws)); * * @param stdiofds may optionally be passed to customize standard i/o * @param stdiofds[𝑖] may be -1 to receive a pipe() fd * @param program will not be PATH searched, see commandv() * @param argv[0] is the name of the program to run * @param argv[1,n-2] optionally specify program arguments * @param argv[n-1] is NULL * @param envp[0,n-2] specifies "foo=bar" environment variables * @param envp[n-1] is NULL * @return pid of child, or -1 w/ errno * @deprecated just use vfork() and execve() */ int spawnve(unsigned flags, int stdiofds[3], const char *program, char *const argv[], char *const envp[]) { if (!argv[0]) return einval(); int defaultfds[3] = {pushpop(STDIN_FILENO), pushpop(STDOUT_FILENO), pushpop(STDERR_FILENO)}; if (!IsWindows()) { return spawnve$sysv(flags, stdiofds ?: defaultfds, program, argv, envp); } else { return spawnve$nt(flags, stdiofds ?: defaultfds, program, argv, envp); } }