Blame src/internal/slibtool_spawn_impl.h

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/*******************************************************************/
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/*  slibtool: a skinny libtool implementation, written in C        */
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/*  Copyright (C) 2016--2018  Z. Gilboa                            */
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/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
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/*******************************************************************/
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#ifndef SLIBTOOL_SPAWN_IMPL_H
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#define SLIBTOOL_SPAWN_IMPL_H
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#include <limits.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <sys/wait.h>
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#ifndef PATH_MAX
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#define PATH_MAX (_XOPEN_PATH_MAX < 4096) ? 4096 : _XOPEN_PATH_MAX
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#endif
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#ifndef SLBT_USE_FORK
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#ifndef SLBT_USE_VFORK
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#ifndef SLBT_USE_POSIX_SPAWN
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#define SLBT_USE_POSIX_SPAWN
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#endif
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#endif
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#endif
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#ifdef  SLBT_USE_POSIX_SPAWN
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#include <spawn.h>
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#endif
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extern char ** environ;
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static inline int slbt_spawn(
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	struct slbt_exec_ctx *	ectx,
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	bool			fwait)
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{
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	pid_t	pid;
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#ifdef SLBT_USE_POSIX_SPAWN
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	if (posix_spawnp(
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			&pid,
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			ectx->program,
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			0,0,
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			ectx->argv,
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			ectx->envp ? ectx->envp : environ))
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		pid = -1;
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#else
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#ifdef SLBT_USE_FORK
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	pid = fork();
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#else
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	pid = vfork();
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#endif
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#endif
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	if (pid < 0) {
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		ectx->pid      = pid;
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		ectx->exitcode = errno;
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		return -1;
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	}
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	if (pid == 0) {
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		execvp(
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			ectx->program,
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			ectx->argv);
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		_exit(errno);
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	}
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	errno     = 0;
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	ectx->pid = pid;
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	if (fwait)
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		return waitpid(
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			pid,
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			&ectx->exitcode,
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			0);
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	return 0;
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}
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#endif