65 lines
3.6 KiB
C
65 lines
3.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/bits/pushpop.h"
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#include "libc/calls/hefty/internal.h"
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#include "libc/calls/hefty/spawn.h"
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#include "libc/dce.h"
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#include "libc/sysv/consts/fileno.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Launches program, e.g.
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*
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* char buf[2];
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* int ws, pid, fds[3] = {-1, -1, STDERR_FILENO};
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* CHECK_NE(-1, (pid = spawnve(0, fds, commandv("ssh"),
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* (char *const[]){"ssh", hostname, "cat", 0},
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* environ)));
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* CHECK_EQ(+2, write(fds[0], "hi", 2));
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* CHECK_NE(-1, close(fds[0]));
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* CHECK_EQ(+2, read(fds[1], buf, 2)));
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* CHECK_NE(-1, close(fds[1]));
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* CHECK_EQ(+0, memcmp(buf, "hi", 2)));
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* CHECK_NE(-1, waitpid(pid, &ws, 0));
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* CHECK_EQ(+0, WEXITSTATUS(ws));
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*
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* @param stdiofds may optionally be passed to customize standard i/o
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* @param stdiofds[𝑖] may be -1 to receive a pipe() fd
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* @param program will not be PATH searched, see commandv()
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* @param argv[0] is the name of the program to run
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* @param argv[1,n-2] optionally specify program arguments
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* @param argv[n-1] is NULL
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* @param envp[0,n-2] specifies "foo=bar" environment variables
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* @param envp[n-1] is NULL
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* @return pid of child, or -1 w/ errno
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* @deprecated just use vfork() and execve()
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*/
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int spawnve(unsigned flags, int stdiofds[3], const char *program,
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char *const argv[], char *const envp[]) {
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if (!argv[0]) return einval();
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int defaultfds[3] = {pushpop(STDIN_FILENO), pushpop(STDOUT_FILENO),
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pushpop(STDERR_FILENO)};
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if (!IsWindows()) {
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return spawnve$sysv(flags, stdiofds ?: defaultfds, program, argv, envp);
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} else {
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return spawnve$nt(flags, stdiofds ?: defaultfds, program, argv, envp);
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}
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}
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