Revert "libxbps: implement xbps_file_exec() with posix_spawn()."
This reverts commit 5aa05f4c72
.
This commit is contained in:
parent
5aa05f4c72
commit
a94dd5dbfa
2
3RDPARTY
2
3RDPARTY
@ -13,6 +13,8 @@ internal use in the code:
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- mkpath from NetBSD's mkdir(1): lib/external/mkpath.c
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- fexec from NetBSD's pkg_install: lib/external/fexec.c
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- libfetch-2.31 from NetBSD: lib/fetch
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- portableproplib-0.4.1 (lib/portableproplib) from
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2
COPYING
2
COPYING
@ -140,7 +140,7 @@ This product uses some code with the following license
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*/
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This product uses some code with the following license
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(lib/humanize_number.c):
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(lib/humanize_number.c, lib/fexec.c):
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/*
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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3
NEWS
3
NEWS
@ -1,8 +1,5 @@
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xbps-0.16 (???):
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* libxbps: implemented xbps_file_exec thru posix_spawn. That means
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posix_spawn() is now required in xbps.
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* libxbps: renamed xbps_repository_pool_xxx to xbps_rpool_xxx
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(API/ABI incompat changes).
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22
configure
vendored
22
configure
vendored
@ -305,28 +305,6 @@ if [ -n "$BUILD_PIE" ]; then
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fi
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fi
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#
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# Check for posix_spawn (required).
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#
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func=posix_spawn
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printf "Checking for $func() ... "
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cat <<EOF > _$func.c
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#include <stdio.h>
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#include <spawn.h>
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int main(void) {
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posix_spawn(NULL, NULL, NULL, NULL, NULL, NULL);
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return 0;
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}
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EOF
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if $XCC _${func}.c -o _${func} 2>/dev/null; then
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rm -f _$func.c _$func
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echo "yes."
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else
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echo "not found! $func is required by xbps, exiting..."
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rm -f _$func.c _$func
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exit 1
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fi
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#
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# Check for vasprintf().
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#
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@ -56,7 +56,7 @@
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*/
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#define XBPS_PKGINDEX_VERSION "1.4"
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#define XBPS_API_VERSION "20120530-3"
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#define XBPS_API_VERSION "20120530-2"
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#define XBPS_VERSION "0.16"
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/**
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@ -165,9 +165,11 @@ char HIDDEN *xbps_get_remote_repo_string(const char *);
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/**
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* @private
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* From lib/file_exec.c
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* From lib/fexec.c
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*/
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int HIDDEN xbps_file_exec(const char *, ...);
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int HIDDEN xbps_file_exec_skipempty(const char *, ...);
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int HIDDEN xbps_file_chdir_exec(const char *, const char *, ...);
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/**
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* @private
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@ -37,7 +37,7 @@ LIBFETCH_OBJS =
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endif
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# External code used by libxbps
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EXTOBJS = external/dewey.o external/humanize_number.o
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EXTOBJS = external/dewey.o external/fexec.o external/humanize_number.o
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EXTOBJS += external/match.o external/mkpath.o
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# libxbps
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@ -46,7 +46,7 @@ OBJS += package_remove.o package_remove_obsoletes.o package_state.o
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OBJS += package_unpack.o package_requiredby.o package_register.o
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OBJS += transaction_commit.o transaction_package_replace.o
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OBJS += transaction_dictionary.o transaction_sortdeps.o transaction_ops.o
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OBJS += download.o initend.o pkgdb.o file_exec.o
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OBJS += download.o initend.o pkgdb.o
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OBJS += plist.o plist_archive_entry.o plist_find.o plist_match.o
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OBJS += plist_remove.o plist_fetch.o util.o util_hash.o
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OBJS += repository_finddeps.o cb_util.o
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173
lib/external/fexec.c
vendored
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173
lib/external/fexec.c
vendored
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@ -0,0 +1,173 @@
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/*-
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matthias Scheler.
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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 CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE 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 IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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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 <stdarg.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 "xbps_api_impl.h"
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static int
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pfcexec(const char *path, const char *file, const char **argv)
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{
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pid_t child;
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int status;
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bool do_chroot = false;
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child = vfork();
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switch (child) {
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case 0:
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if (getuid() == 0 && access("./bin/sh", X_OK) == 0)
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do_chroot = true;
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/*
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* If uid==0 and /bin/sh exists, we can change root directory,
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* fork and execute the command. Otherwise just change current
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* directory and fork/execute.
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*/
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if (path && do_chroot) {
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if (chroot(path) == -1)
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_exit(127);
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if (chdir("/") == -1)
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_exit(127);
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} else if (path && !do_chroot) {
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if (chdir(path) == -1)
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_exit(127);
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} else if (path == NULL && do_chroot) {
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if (chroot(".") == -1) {
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if (errno != EPERM)
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_exit(127);
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if (chdir(".") == -1)
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_exit(127);
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} else {
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if (chdir("/") == -1)
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_exit(127);
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}
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}
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(void)execv(file, __UNCONST(argv));
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_exit(127);
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/* NOTREACHED */
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case -1:
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return -1;
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}
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while (waitpid(child, &status, 0) < 0) {
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if (errno != EINTR)
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return -1;
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}
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if (!WIFEXITED(status))
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return -1;
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return WEXITSTATUS(status);
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}
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static int
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vfcexec(const char *path, int skipempty, const char *arg, va_list ap)
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{
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const char **argv;
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size_t argv_size, argc;
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int retval;
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argv_size = 16;
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if ((argv = malloc(argv_size * sizeof(*argv))) == NULL) {
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errno = ENOMEM;
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return -1;
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}
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argv[0] = arg;
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argc = 1;
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do {
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if (argc == argv_size) {
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argv_size *= 2;
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argv = realloc(argv, argv_size * sizeof(*argv));
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if (argv == NULL) {
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errno = ENOMEM;
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return -1;
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}
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}
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arg = va_arg(ap, const char *);
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if (skipempty && arg && strlen(arg) == 0)
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continue;
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argv[argc++] = arg;
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} while (arg != NULL);
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retval = pfcexec(path, argv[0], argv);
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free(argv);
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return retval;
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}
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int HIDDEN
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xbps_file_exec(const char *arg, ...)
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{
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va_list ap;
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int result;
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va_start(ap, arg);
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result = vfcexec(NULL, 0, arg, ap);
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va_end(ap);
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return result;
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}
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int HIDDEN
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xbps_file_exec_skipempty(const char *arg, ...)
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{
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va_list ap;
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int result;
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va_start(ap, arg);
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result = vfcexec(NULL, 1, arg, ap);
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va_end(ap);
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return result;
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}
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int HIDDEN
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xbps_file_chdir_exec(const char *path, const char *arg, ...)
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{
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va_list ap;
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int result;
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va_start(ap, arg);
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result = vfcexec(path, 0, arg, ap);
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va_end(ap);
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return result;
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}
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108
lib/file_exec.c
108
lib/file_exec.c
@ -1,108 +0,0 @@
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/*-
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* Copyright (c) 2012 Juan Romero Pardines.
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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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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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 <stdarg.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 <spawn.h>
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#include "xbps_api_impl.h"
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static int
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pfcexec(const char *file, const char **argv)
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{
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pid_t child;
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int status, rv;
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if (((getuid() == 0) && (access("bin/sh", X_OK) == 0))) {
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if ((chroot(".") != 0) && (chdir("/") != 0))
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return errno;
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}
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if ((rv = posix_spawn(&child, file, NULL, NULL,
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(char ** const)__UNCONST(argv),
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NULL)) == 0) {
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while (waitpid(child, &status, 0) < 0) {
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if (errno != EINTR)
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return errno;
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}
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if (!WIFEXITED(status))
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return errno;
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return WEXITSTATUS(status);
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}
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return rv;
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}
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static int
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vfcexec(const char *arg, va_list ap)
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{
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const char **argv;
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size_t argv_size, argc;
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int retval;
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argv_size = 16;
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if ((argv = malloc(argv_size * sizeof(*argv))) == NULL) {
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errno = ENOMEM;
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return -1;
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}
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argv[0] = arg;
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argc = 1;
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do {
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if (argc == argv_size) {
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argv_size *= 2;
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argv = realloc(argv, argv_size * sizeof(*argv));
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if (argv == NULL) {
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errno = ENOMEM;
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return -1;
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}
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}
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arg = va_arg(ap, const char *);
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argv[argc++] = arg;
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} while (arg != NULL);
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retval = pfcexec(argv[0], argv);
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free(argv);
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return retval;
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}
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int HIDDEN
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xbps_file_exec(const char *arg, ...)
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{
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va_list ap;
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int result;
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va_start(ap, arg);
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result = vfcexec(arg, ap);
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va_end(ap);
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return result;
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}
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