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55 lines
2.9 KiB
55 lines
2.9 KiB
/*-*- 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/calls/calls.h" |
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#include "libc/calls/hefty/mkvarargv.h" |
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#include "libc/calls/hefty/spawn.h" |
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#include "libc/mem/mem.h" |
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#include "libc/runtime/missioncritical.h" |
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#include "libc/runtime/runtime.h" |
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/** |
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* Launches program, with PATH search and current environment. |
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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 prog is program to launch (may be PATH searched) |
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* @param arg[0] is the name of the program to run |
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* @param arg[1,n-2] optionally specify program arguments |
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* @param arg[n-1] is NULL |
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* @return pid of child, or -1 w/ errno |
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*/ |
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nodiscard int spawnlp(unsigned flags, int stdiofds[3], const char *prog, |
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const char *arg, ... /*, NULL*/) { |
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int pid; |
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char *exe; |
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va_list va; |
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void *argv; |
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char pathbuf[PATH_MAX]; |
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pid = -1; |
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if ((exe = commandv(prog, pathbuf))) { |
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va_start(va, arg); |
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if ((argv = mkvarargv(arg, va))) { |
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pid = spawnve(flags, stdiofds, exe, argv, environ); |
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free(argv); |
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} |
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va_end(va); |
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} |
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return pid; |
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}
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