671 lines
17 KiB
C
671 lines
17 KiB
C
/* Copyright (c) 2007 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
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* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
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#include "atf-c/detail/process.h"
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "atf-c/defs.h"
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#include "atf-c/detail/sanity.h"
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#include "atf-c/error.h"
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/* This prototype is not in the header file because this is a private
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* function; however, we need to access it during testing. */
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atf_error_t atf_process_status_init(atf_process_status_t *, int);
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/* ---------------------------------------------------------------------
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* The "stream_prepare" auxiliary type.
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* --------------------------------------------------------------------- */
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struct stream_prepare {
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const atf_process_stream_t *m_sb;
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bool m_pipefds_ok;
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int m_pipefds[2];
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};
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typedef struct stream_prepare stream_prepare_t;
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static
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atf_error_t
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stream_prepare_init(stream_prepare_t *sp, const atf_process_stream_t *sb)
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{
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atf_error_t err;
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const int type = atf_process_stream_type(sb);
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sp->m_sb = sb;
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sp->m_pipefds_ok = false;
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if (type == atf_process_stream_type_capture) {
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if (pipe(sp->m_pipefds) == -1)
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err = atf_libc_error(errno, "Failed to create pipe");
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else {
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err = atf_no_error();
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sp->m_pipefds_ok = true;
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}
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} else
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err = atf_no_error();
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return err;
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}
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static
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void
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stream_prepare_fini(stream_prepare_t *sp)
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{
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if (sp->m_pipefds_ok) {
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close(sp->m_pipefds[0]);
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close(sp->m_pipefds[1]);
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}
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}
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/* ---------------------------------------------------------------------
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* The "atf_process_stream" type.
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* --------------------------------------------------------------------- */
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const int atf_process_stream_type_capture = 1;
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const int atf_process_stream_type_connect = 2;
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const int atf_process_stream_type_inherit = 3;
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const int atf_process_stream_type_redirect_fd = 4;
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const int atf_process_stream_type_redirect_path = 5;
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static
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bool
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stream_is_valid(const atf_process_stream_t *sb)
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{
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return (sb->m_type == atf_process_stream_type_capture) ||
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(sb->m_type == atf_process_stream_type_connect) ||
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(sb->m_type == atf_process_stream_type_inherit) ||
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(sb->m_type == atf_process_stream_type_redirect_fd) ||
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(sb->m_type == atf_process_stream_type_redirect_path);
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}
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atf_error_t
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atf_process_stream_init_capture(atf_process_stream_t *sb)
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{
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sb->m_type = atf_process_stream_type_capture;
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POST(stream_is_valid(sb));
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return atf_no_error();
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}
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atf_error_t
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atf_process_stream_init_connect(atf_process_stream_t *sb,
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const int src_fd, const int tgt_fd)
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{
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PRE(src_fd >= 0);
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PRE(tgt_fd >= 0);
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PRE(src_fd != tgt_fd);
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sb->m_type = atf_process_stream_type_connect;
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sb->m_src_fd = src_fd;
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sb->m_tgt_fd = tgt_fd;
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POST(stream_is_valid(sb));
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return atf_no_error();
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}
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atf_error_t
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atf_process_stream_init_inherit(atf_process_stream_t *sb)
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{
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sb->m_type = atf_process_stream_type_inherit;
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POST(stream_is_valid(sb));
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return atf_no_error();
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}
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atf_error_t
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atf_process_stream_init_redirect_fd(atf_process_stream_t *sb,
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const int fd)
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{
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sb->m_type = atf_process_stream_type_redirect_fd;
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sb->m_fd = fd;
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POST(stream_is_valid(sb));
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return atf_no_error();
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}
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atf_error_t
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atf_process_stream_init_redirect_path(atf_process_stream_t *sb,
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const atf_fs_path_t *path)
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{
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sb->m_type = atf_process_stream_type_redirect_path;
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sb->m_path = path;
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POST(stream_is_valid(sb));
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return atf_no_error();
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}
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void
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atf_process_stream_fini(atf_process_stream_t *sb)
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{
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PRE(stream_is_valid(sb));
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}
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int
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atf_process_stream_type(const atf_process_stream_t *sb)
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{
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PRE(stream_is_valid(sb));
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return sb->m_type;
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}
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/* ---------------------------------------------------------------------
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* The "atf_process_status" type.
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* --------------------------------------------------------------------- */
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atf_error_t
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atf_process_status_init(atf_process_status_t *s, int status)
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{
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s->m_status = status;
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return atf_no_error();
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}
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void
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atf_process_status_fini(atf_process_status_t *s ATF_DEFS_ATTRIBUTE_UNUSED)
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{
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}
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bool
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atf_process_status_exited(const atf_process_status_t *s)
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{
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int mutable_status = s->m_status;
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return WIFEXITED(mutable_status);
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}
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int
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atf_process_status_exitstatus(const atf_process_status_t *s)
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{
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PRE(atf_process_status_exited(s));
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int mutable_status = s->m_status;
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return WEXITSTATUS(mutable_status);
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}
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bool
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atf_process_status_signaled(const atf_process_status_t *s)
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{
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int mutable_status = s->m_status;
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return WIFSIGNALED(mutable_status);
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}
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int
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atf_process_status_termsig(const atf_process_status_t *s)
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{
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PRE(atf_process_status_signaled(s));
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int mutable_status = s->m_status;
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return WTERMSIG(mutable_status);
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}
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bool
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atf_process_status_coredump(const atf_process_status_t *s)
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{
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PRE(atf_process_status_signaled(s));
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#if defined(WCOREDUMP)
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int mutable_status = s->m_status;
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return WCOREDUMP(mutable_status);
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#else
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return false;
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#endif
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}
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/* ---------------------------------------------------------------------
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* The "atf_process_child" type.
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* --------------------------------------------------------------------- */
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static
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atf_error_t
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atf_process_child_init(atf_process_child_t *c)
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{
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c->m_pid = 0;
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c->m_stdout = -1;
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c->m_stderr = -1;
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return atf_no_error();
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}
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static
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void
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atf_process_child_fini(atf_process_child_t *c)
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{
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if (c->m_stdout != -1)
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close(c->m_stdout);
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if (c->m_stderr != -1)
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close(c->m_stderr);
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}
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atf_error_t
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atf_process_child_wait(atf_process_child_t *c, atf_process_status_t *s)
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{
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atf_error_t err;
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int status;
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if (waitpid(c->m_pid, &status, 0) == -1)
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err = atf_libc_error(errno, "Failed waiting for process %d",
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c->m_pid);
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else {
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atf_process_child_fini(c);
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err = atf_process_status_init(s, status);
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}
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return err;
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}
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pid_t
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atf_process_child_pid(const atf_process_child_t *c)
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{
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return c->m_pid;
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}
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int
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atf_process_child_stdout(atf_process_child_t *c)
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{
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PRE(c->m_stdout != -1);
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return c->m_stdout;
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}
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int
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atf_process_child_stderr(atf_process_child_t *c)
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{
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PRE(c->m_stderr != -1);
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return c->m_stderr;
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}
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/* ---------------------------------------------------------------------
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* Free functions.
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* --------------------------------------------------------------------- */
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static
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atf_error_t
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safe_dup(const int oldfd, const int newfd)
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{
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atf_error_t err;
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if (oldfd != newfd) {
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if (dup2(oldfd, newfd) == -1) {
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err = atf_libc_error(errno, "Could not allocate file descriptor");
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} else {
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close(oldfd);
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err = atf_no_error();
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}
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} else
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err = atf_no_error();
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return err;
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}
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static
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atf_error_t
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child_connect(const stream_prepare_t *sp, int procfd)
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{
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atf_error_t err;
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const int type = atf_process_stream_type(sp->m_sb);
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if (type == atf_process_stream_type_capture) {
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close(sp->m_pipefds[0]);
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err = safe_dup(sp->m_pipefds[1], procfd);
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} else if (type == atf_process_stream_type_connect) {
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if (dup2(sp->m_sb->m_tgt_fd, sp->m_sb->m_src_fd) == -1)
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err = atf_libc_error(errno, "Cannot connect descriptor %d to %d",
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sp->m_sb->m_tgt_fd, sp->m_sb->m_src_fd);
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else
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err = atf_no_error();
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} else if (type == atf_process_stream_type_inherit) {
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err = atf_no_error();
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} else if (type == atf_process_stream_type_redirect_fd) {
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err = safe_dup(sp->m_sb->m_fd, procfd);
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} else if (type == atf_process_stream_type_redirect_path) {
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int aux = open(atf_fs_path_cstring(sp->m_sb->m_path),
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O_WRONLY | O_CREAT | O_TRUNC, 0644);
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if (aux == -1)
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err = atf_libc_error(errno, "Could not create %s",
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atf_fs_path_cstring(sp->m_sb->m_path));
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else {
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err = safe_dup(aux, procfd);
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if (atf_is_error(err))
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close(aux);
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}
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} else {
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UNREACHABLE;
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err = atf_no_error();
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}
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return err;
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}
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static
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void
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parent_connect(const stream_prepare_t *sp, int *fd)
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{
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const int type = atf_process_stream_type(sp->m_sb);
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if (type == atf_process_stream_type_capture) {
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close(sp->m_pipefds[1]);
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*fd = sp->m_pipefds[0];
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} else if (type == atf_process_stream_type_connect) {
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/* Do nothing. */
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} else if (type == atf_process_stream_type_inherit) {
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/* Do nothing. */
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} else if (type == atf_process_stream_type_redirect_fd) {
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/* Do nothing. */
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} else if (type == atf_process_stream_type_redirect_path) {
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/* Do nothing. */
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} else {
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UNREACHABLE;
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}
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}
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static
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atf_error_t
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do_parent(atf_process_child_t *c,
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const pid_t pid,
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const stream_prepare_t *outsp,
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const stream_prepare_t *errsp)
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{
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atf_error_t err;
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err = atf_process_child_init(c);
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if (atf_is_error(err))
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goto out;
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c->m_pid = pid;
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parent_connect(outsp, &c->m_stdout);
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parent_connect(errsp, &c->m_stderr);
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out:
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return err;
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}
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static
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void
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do_child(void (*)(void *),
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void *,
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const stream_prepare_t *,
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const stream_prepare_t *) ATF_DEFS_ATTRIBUTE_NORETURN;
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static
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void
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do_child(void (*start)(void *),
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void *v,
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const stream_prepare_t *outsp,
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const stream_prepare_t *errsp)
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{
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atf_error_t err;
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err = child_connect(outsp, STDOUT_FILENO);
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if (atf_is_error(err))
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goto out;
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err = child_connect(errsp, STDERR_FILENO);
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if (atf_is_error(err))
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goto out;
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start(v);
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UNREACHABLE;
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out:
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if (atf_is_error(err)) {
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char buf[1024];
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atf_error_format(err, buf, sizeof(buf));
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fprintf(stderr, "Unhandled error: %s\n", buf);
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atf_error_free(err);
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exit(EXIT_FAILURE);
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} else
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exit(EXIT_SUCCESS);
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}
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static
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atf_error_t
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fork_with_streams(atf_process_child_t *c,
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void (*start)(void *),
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const atf_process_stream_t *outsb,
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const atf_process_stream_t *errsb,
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void *v)
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{
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atf_error_t err;
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stream_prepare_t outsp;
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stream_prepare_t errsp;
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pid_t pid;
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err = stream_prepare_init(&outsp, outsb);
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if (atf_is_error(err))
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goto out;
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err = stream_prepare_init(&errsp, errsb);
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if (atf_is_error(err))
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goto err_outpipe;
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pid = fork();
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if (pid == -1) {
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err = atf_libc_error(errno, "Failed to fork");
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goto err_errpipe;
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}
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if (pid == 0) {
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do_child(start, v, &outsp, &errsp);
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UNREACHABLE;
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abort();
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err = atf_no_error();
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} else {
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err = do_parent(c, pid, &outsp, &errsp);
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if (atf_is_error(err))
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goto err_errpipe;
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}
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goto out;
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err_errpipe:
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stream_prepare_fini(&errsp);
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err_outpipe:
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stream_prepare_fini(&outsp);
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out:
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return err;
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}
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static
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atf_error_t
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init_stream_w_default(const atf_process_stream_t *usersb,
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atf_process_stream_t *inheritsb,
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const atf_process_stream_t **realsb)
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{
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atf_error_t err;
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if (usersb == NULL) {
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err = atf_process_stream_init_inherit(inheritsb);
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if (!atf_is_error(err))
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*realsb = inheritsb;
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} else {
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err = atf_no_error();
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*realsb = usersb;
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}
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return err;
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}
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atf_error_t
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atf_process_fork(atf_process_child_t *c,
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void (*start)(void *),
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const atf_process_stream_t *outsb,
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const atf_process_stream_t *errsb,
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void *v)
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{
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atf_error_t err;
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atf_process_stream_t inherit_outsb, inherit_errsb;
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const atf_process_stream_t *real_outsb, *real_errsb;
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real_outsb = NULL; /* Shut up GCC warning. */
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err = init_stream_w_default(outsb, &inherit_outsb, &real_outsb);
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if (atf_is_error(err))
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goto out;
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real_errsb = NULL; /* Shut up GCC warning. */
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err = init_stream_w_default(errsb, &inherit_errsb, &real_errsb);
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if (atf_is_error(err))
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goto out_out;
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|
|
err = fork_with_streams(c, start, real_outsb, real_errsb, v);
|
|
|
|
if (errsb == NULL)
|
|
atf_process_stream_fini(&inherit_errsb);
|
|
out_out:
|
|
if (outsb == NULL)
|
|
atf_process_stream_fini(&inherit_outsb);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static
|
|
int
|
|
const_execvp(const char *file, const char *const *argv)
|
|
{
|
|
#define UNCONST(a) ((void *)(unsigned long)(const void *)(a))
|
|
return execvp(file, UNCONST(argv));
|
|
#undef UNCONST
|
|
}
|
|
|
|
static
|
|
atf_error_t
|
|
list_to_array(const atf_list_t *l, const char ***ap)
|
|
{
|
|
atf_error_t err;
|
|
const char **a;
|
|
|
|
a = (const char **)malloc((atf_list_size(l) + 1) * sizeof(const char *));
|
|
if (a == NULL)
|
|
err = atf_no_memory_error();
|
|
else {
|
|
const char **aiter;
|
|
atf_list_citer_t liter;
|
|
|
|
aiter = a;
|
|
atf_list_for_each_c(liter, l) {
|
|
*aiter = (const char *)atf_list_citer_data(liter);
|
|
aiter++;
|
|
}
|
|
*aiter = NULL;
|
|
|
|
err = atf_no_error();
|
|
*ap = a;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
struct exec_args {
|
|
const atf_fs_path_t *m_prog;
|
|
const char *const *m_argv;
|
|
void (*m_prehook)(void);
|
|
};
|
|
|
|
static
|
|
void
|
|
do_exec(void *v)
|
|
{
|
|
struct exec_args *ea = v;
|
|
|
|
if (ea->m_prehook != NULL)
|
|
ea->m_prehook();
|
|
|
|
const int ret = const_execvp(atf_fs_path_cstring(ea->m_prog), ea->m_argv);
|
|
const int errnocopy = errno;
|
|
INV(ret == -1);
|
|
fprintf(stderr, "exec(%s) failed: %s\n",
|
|
atf_fs_path_cstring(ea->m_prog), strerror(errnocopy));
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
atf_error_t
|
|
atf_process_exec_array(atf_process_status_t *s,
|
|
const atf_fs_path_t *prog,
|
|
const char *const *argv,
|
|
const atf_process_stream_t *outsb,
|
|
const atf_process_stream_t *errsb,
|
|
void (*prehook)(void))
|
|
{
|
|
atf_error_t err;
|
|
atf_process_child_t c;
|
|
struct exec_args ea = { prog, argv, prehook };
|
|
|
|
PRE(outsb == NULL ||
|
|
atf_process_stream_type(outsb) != atf_process_stream_type_capture);
|
|
PRE(errsb == NULL ||
|
|
atf_process_stream_type(errsb) != atf_process_stream_type_capture);
|
|
|
|
err = atf_process_fork(&c, do_exec, outsb, errsb, &ea);
|
|
if (atf_is_error(err))
|
|
goto out;
|
|
|
|
again:
|
|
err = atf_process_child_wait(&c, s);
|
|
if (atf_is_error(err)) {
|
|
INV(atf_error_is(err, "libc") && atf_libc_error_code(err) == EINTR);
|
|
atf_error_free(err);
|
|
goto again;
|
|
}
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
atf_error_t
|
|
atf_process_exec_list(atf_process_status_t *s,
|
|
const atf_fs_path_t *prog,
|
|
const atf_list_t *argv,
|
|
const atf_process_stream_t *outsb,
|
|
const atf_process_stream_t *errsb,
|
|
void (*prehook)(void))
|
|
{
|
|
atf_error_t err;
|
|
const char **argv2;
|
|
|
|
PRE(outsb == NULL ||
|
|
atf_process_stream_type(outsb) != atf_process_stream_type_capture);
|
|
PRE(errsb == NULL ||
|
|
atf_process_stream_type(errsb) != atf_process_stream_type_capture);
|
|
|
|
argv2 = NULL; /* Silence GCC warning. */
|
|
err = list_to_array(argv, &argv2);
|
|
if (atf_is_error(err))
|
|
goto out;
|
|
|
|
err = atf_process_exec_array(s, prog, argv2, outsb, errsb, prehook);
|
|
|
|
free(argv2);
|
|
out:
|
|
return err;
|
|
}
|