e18ad51c15
The previous behaviour was to silently download and install the pkg package, without ever telling user about what it was doing and why. Discussed with: bapt Reviewed by: kib
443 lines
9.5 KiB
C
443 lines
9.5 KiB
C
/*-
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* Copyright (c) 2012 Baptiste Daroussin <bapt@FreeBSD.org>
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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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/elf_common.h>
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#include <sys/endian.h>
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#include <sys/wait.h>
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#include <archive.h>
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#include <archive_entry.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <fetch.h>
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#include <gelf.h>
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#include <paths.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "elf_tables.h"
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#define _LOCALBASE "/usr/local"
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#define _PKGS_URL "http://pkgbeta.FreeBSD.org"
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static const char *
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elf_corres_to_string(struct _elf_corres *m, int e)
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{
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int i;
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for (i = 0; m[i].string != NULL; i++)
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if (m[i].elf_nb == e)
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return (m[i].string);
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return ("unknown");
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}
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static int
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pkg_get_myabi(char *dest, size_t sz)
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{
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Elf *elf;
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Elf_Data *data;
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Elf_Note note;
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Elf_Scn *scn;
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char *src, *osname;
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const char *abi;
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GElf_Ehdr elfhdr;
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GElf_Shdr shdr;
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int fd, i, ret;
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uint32_t version;
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version = 0;
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ret = -1;
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scn = NULL;
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abi = NULL;
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if (elf_version(EV_CURRENT) == EV_NONE) {
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warnx("ELF library initialization failed: %s",
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elf_errmsg(-1));
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return (-1);
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}
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if ((fd = open("/bin/sh", O_RDONLY)) < 0) {
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warn("open()");
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return (-1);
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}
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if ((elf = elf_begin(fd, ELF_C_READ, NULL)) == NULL) {
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ret = -1;
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warnx("elf_begin() failed: %s.", elf_errmsg(-1));
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goto cleanup;
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}
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if (gelf_getehdr(elf, &elfhdr) == NULL) {
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ret = -1;
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warn("getehdr() failed: %s.", elf_errmsg(-1));
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goto cleanup;
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}
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while ((scn = elf_nextscn(elf, scn)) != NULL) {
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if (gelf_getshdr(scn, &shdr) != &shdr) {
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ret = -1;
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warn("getshdr() failed: %s.", elf_errmsg(-1));
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goto cleanup;
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}
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if (shdr.sh_type == SHT_NOTE)
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break;
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}
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if (scn == NULL) {
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ret = -1;
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warn("failed to get the note section");
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goto cleanup;
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}
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data = elf_getdata(scn, NULL);
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src = data->d_buf;
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for (;;) {
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memcpy(¬e, src, sizeof(Elf_Note));
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src += sizeof(Elf_Note);
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if (note.n_type == NT_VERSION)
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break;
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src += note.n_namesz + note.n_descsz;
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}
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osname = src;
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src += note.n_namesz;
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if (elfhdr.e_ident[EI_DATA] == ELFDATA2MSB)
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version = be32dec(src);
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else
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version = le32dec(src);
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for (i = 0; osname[i] != '\0'; i++)
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osname[i] = (char)tolower(osname[i]);
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snprintf(dest, sz, "%s:%d:%s:%s",
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osname, version / 100000,
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elf_corres_to_string(mach_corres, (int)elfhdr.e_machine),
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elf_corres_to_string(wordsize_corres,
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(int)elfhdr.e_ident[EI_CLASS]));
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ret = 0;
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switch (elfhdr.e_machine) {
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case EM_ARM:
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snprintf(dest + strlen(dest), sz - strlen(dest),
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":%s:%s:%s", elf_corres_to_string(endian_corres,
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(int)elfhdr.e_ident[EI_DATA]),
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(elfhdr.e_flags & EF_ARM_NEW_ABI) > 0 ?
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"eabi" : "oabi",
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(elfhdr.e_flags & EF_ARM_VFP_FLOAT) > 0 ?
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"softfp" : "vfp");
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break;
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case EM_MIPS:
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/*
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* this is taken from binutils sources:
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* include/elf/mips.h
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* mapping is figured out from binutils:
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* gas/config/tc-mips.c
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*/
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switch (elfhdr.e_flags & EF_MIPS_ABI) {
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case E_MIPS_ABI_O32:
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abi = "o32";
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break;
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case E_MIPS_ABI_N32:
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abi = "n32";
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break;
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default:
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if (elfhdr.e_ident[EI_DATA] ==
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ELFCLASS32)
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abi = "o32";
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else if (elfhdr.e_ident[EI_DATA] ==
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ELFCLASS64)
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abi = "n64";
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break;
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}
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snprintf(dest + strlen(dest), sz - strlen(dest),
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":%s:%s", elf_corres_to_string(endian_corres,
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(int)elfhdr.e_ident[EI_DATA]), abi);
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break;
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}
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cleanup:
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if (elf != NULL)
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elf_end(elf);
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close(fd);
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return (ret);
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}
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static int
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extract_pkg_static(int fd, char *p, int sz)
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{
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struct archive *a;
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struct archive_entry *ae;
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char *end;
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int ret, r;
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ret = -1;
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a = archive_read_new();
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if (a == NULL) {
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warn("archive_read_new");
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return (ret);
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}
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archive_read_support_compression_all(a);
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archive_read_support_format_tar(a);
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if (lseek(fd, 0, 0) == -1) {
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warn("lseek");
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goto cleanup;
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}
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if (archive_read_open_fd(a, fd, 4096) != ARCHIVE_OK) {
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warnx("archive_read_open_fd: %s", archive_error_string(a));
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goto cleanup;
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}
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ae = NULL;
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while ((r = archive_read_next_header(a, &ae)) == ARCHIVE_OK) {
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end = strrchr(archive_entry_pathname(ae), '/');
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if (end == NULL)
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continue;
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if (strcmp(end, "/pkg-static") == 0) {
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r = archive_read_extract(a, ae,
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ARCHIVE_EXTRACT_OWNER | ARCHIVE_EXTRACT_PERM |
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ARCHIVE_EXTRACT_TIME | ARCHIVE_EXTRACT_ACL |
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ARCHIVE_EXTRACT_FFLAGS | ARCHIVE_EXTRACT_XATTR);
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strlcpy(p, archive_entry_pathname(ae), sz);
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break;
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}
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}
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if (r == ARCHIVE_OK)
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ret = 0;
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else
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warnx("fail to extract pkg-static");
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cleanup:
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archive_read_finish(a);
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return (ret);
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}
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static int
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install_pkg_static(char *path, char *pkgpath)
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{
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int pstat;
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pid_t pid;
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switch ((pid = fork())) {
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case -1:
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return (-1);
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case 0:
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execl(path, "pkg-static", "add", pkgpath, (char *)NULL);
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_exit(1);
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default:
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break;
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}
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while (waitpid(pid, &pstat, 0) == -1)
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if (errno != EINTR)
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return (-1);
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if (WEXITSTATUS(pstat))
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return (WEXITSTATUS(pstat));
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else if (WIFSIGNALED(pstat))
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return (128 & (WTERMSIG(pstat)));
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return (pstat);
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}
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static int
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bootstrap_pkg(void)
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{
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FILE *remote;
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FILE *config;
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char *site;
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char url[MAXPATHLEN];
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char conf[MAXPATHLEN];
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char abi[BUFSIZ];
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char tmppkg[MAXPATHLEN];
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char buf[10240];
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char pkgstatic[MAXPATHLEN];
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int fd, retry, ret;
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struct url_stat st;
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off_t done, r;
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time_t now;
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time_t last;
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done = 0;
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last = 0;
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ret = -1;
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remote = NULL;
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config = NULL;
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printf("Bootstrapping pkg please wait\n");
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if (pkg_get_myabi(abi, MAXPATHLEN) != 0) {
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warnx("failed to determine the system ABI");
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return (-1);
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}
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if (getenv("PACKAGESITE") != NULL)
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snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz", getenv("PACKAGESITE"));
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else
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snprintf(url, MAXPATHLEN, "%s/%s/latest/Latest/pkg.txz",
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getenv("PACKAGEROOT") ? getenv("PACKAGEROOT") : _PKGS_URL,
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getenv("ABI") ? getenv("ABI") : abi);
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snprintf(tmppkg, MAXPATHLEN, "%s/pkg.txz.XXXXXX",
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getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP);
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if ((fd = mkstemp(tmppkg)) == -1) {
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warn("mkstemp()");
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return (-1);
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}
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retry = 3;
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do {
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remote = fetchXGetURL(url, &st, "");
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if (remote == NULL)
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sleep(1);
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} while (remote == NULL && retry-- > 0);
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if (remote == NULL)
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goto fetchfail;
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while (done < st.size) {
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if ((r = fread(buf, 1, sizeof(buf), remote)) < 1)
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break;
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if (write(fd, buf, r) != r) {
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warn("write()");
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goto cleanup;
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}
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done += r;
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now = time(NULL);
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if (now > last || done == st.size)
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last = now;
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}
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if (ferror(remote))
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goto fetchfail;
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if ((ret = extract_pkg_static(fd, pkgstatic, MAXPATHLEN)) == 0)
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ret = install_pkg_static(pkgstatic, tmppkg);
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snprintf(conf, MAXPATHLEN, "%s/etc/pkg.conf",
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getenv("LOCALBASE") ? getenv("LOCALBASE") : _LOCALBASE);
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if (access(conf, R_OK) == -1) {
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site = strrchr(url, '/');
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if (site == NULL)
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goto cleanup;
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site[0] = '\0';
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site = strrchr(url, '/');
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if (site == NULL)
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goto cleanup;
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site[0] = '\0';
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config = fopen(conf, "w+");
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if (config == NULL)
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goto cleanup;
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fprintf(config, "packagesite: %s\n", url);
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fclose(config);
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}
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goto cleanup;
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fetchfail:
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warnx("Error fetching %s: %s", url, fetchLastErrString);
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cleanup:
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if (remote != NULL)
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fclose(remote);
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close(fd);
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unlink(tmppkg);
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return (ret);
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}
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static const char confirmation_message[] =
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"The package management tool is not yet installed on your system.\n"
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"Do you want to fetch and install it now? [y/N]: ";
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static int
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pkg_query_yes_no(void)
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{
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int ret, c;
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c = getchar();
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if (c == 'y' || c == 'Y')
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ret = 1;
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else
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ret = 0;
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while (c != '\n' && c != EOF)
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c = getchar();
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return (ret);
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}
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int
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main(__unused int argc, char *argv[])
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{
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char pkgpath[MAXPATHLEN];
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snprintf(pkgpath, MAXPATHLEN, "%s/sbin/pkg",
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getenv("LOCALBASE") ? getenv("LOCALBASE") : _LOCALBASE);
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if (access(pkgpath, X_OK) == -1) {
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/*
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* Do not ask for confirmation if either of stdin or stdout is
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* not tty. Check the environment to see if user has answer
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* tucked in there already.
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*/
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if (getenv("ALWAYS_ASSUME_YES") == NULL &&
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isatty(fileno(stdin))) {
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printf("%s", confirmation_message);
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if (pkg_query_yes_no() == 0)
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exit(EXIT_FAILURE);
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}
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if (bootstrap_pkg() != 0)
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exit(EXIT_FAILURE);
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}
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execv(pkgpath, argv);
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/* NOT REACHED */
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return (EXIT_FAILURE);
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}
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