diff options
Diffstat (limited to 'usr.sbin/pkg/pkg.c')
| -rw-r--r-- | usr.sbin/pkg/pkg.c | 486 |
1 files changed, 486 insertions, 0 deletions
diff --git a/usr.sbin/pkg/pkg.c b/usr.sbin/pkg/pkg.c new file mode 100644 index 0000000..a3c3fec --- /dev/null +++ b/usr.sbin/pkg/pkg.c @@ -0,0 +1,486 @@ +/*- + * Copyright (c) 2012 Baptiste Daroussin <bapt@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/elf_common.h> +#include <sys/endian.h> +#include <sys/wait.h> + +#include <archive.h> +#include <archive_entry.h> +#include <ctype.h> +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <fetch.h> +#include <gelf.h> +#include <paths.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <time.h> +#include <unistd.h> + +#include "elf_tables.h" +#include "dns_utils.h" + +#define _LOCALBASE "/usr/local" +#define _PKGS_URL "http://pkg.FreeBSD.org" + +static const char * +elf_corres_to_string(struct _elf_corres *m, int e) +{ + int i; + + for (i = 0; m[i].string != NULL; i++) + if (m[i].elf_nb == e) + return (m[i].string); + + return ("unknown"); +} + +static int +pkg_get_myabi(char *dest, size_t sz) +{ + Elf *elf; + Elf_Data *data; + Elf_Note note; + Elf_Scn *scn; + char *src, *osname; + const char *abi; + GElf_Ehdr elfhdr; + GElf_Shdr shdr; + int fd, i, ret; + uint32_t version; + + version = 0; + ret = -1; + scn = NULL; + abi = NULL; + + if (elf_version(EV_CURRENT) == EV_NONE) { + warnx("ELF library initialization failed: %s", + elf_errmsg(-1)); + return (-1); + } + + if ((fd = open("/bin/sh", O_RDONLY)) < 0) { + warn("open()"); + return (-1); + } + + if ((elf = elf_begin(fd, ELF_C_READ, NULL)) == NULL) { + ret = -1; + warnx("elf_begin() failed: %s.", elf_errmsg(-1)); + goto cleanup; + } + + if (gelf_getehdr(elf, &elfhdr) == NULL) { + ret = -1; + warn("getehdr() failed: %s.", elf_errmsg(-1)); + goto cleanup; + } + + while ((scn = elf_nextscn(elf, scn)) != NULL) { + if (gelf_getshdr(scn, &shdr) != &shdr) { + ret = -1; + warn("getshdr() failed: %s.", elf_errmsg(-1)); + goto cleanup; + } + + if (shdr.sh_type == SHT_NOTE) + break; + } + + if (scn == NULL) { + ret = -1; + warn("failed to get the note section"); + goto cleanup; + } + + data = elf_getdata(scn, NULL); + src = data->d_buf; + for (;;) { + memcpy(¬e, src, sizeof(Elf_Note)); + src += sizeof(Elf_Note); + if (note.n_type == NT_VERSION) + break; + src += note.n_namesz + note.n_descsz; + } + osname = src; + src += note.n_namesz; + if (elfhdr.e_ident[EI_DATA] == ELFDATA2MSB) + version = be32dec(src); + else + version = le32dec(src); + + for (i = 0; osname[i] != '\0'; i++) + osname[i] = (char)tolower(osname[i]); + + snprintf(dest, sz, "%s:%d:%s:%s", + osname, version / 100000, + elf_corres_to_string(mach_corres, (int)elfhdr.e_machine), + elf_corres_to_string(wordsize_corres, + (int)elfhdr.e_ident[EI_CLASS])); + + ret = 0; + + switch (elfhdr.e_machine) { + case EM_ARM: + snprintf(dest + strlen(dest), sz - strlen(dest), + ":%s:%s:%s", elf_corres_to_string(endian_corres, + (int)elfhdr.e_ident[EI_DATA]), + (elfhdr.e_flags & EF_ARM_NEW_ABI) > 0 ? + "eabi" : "oabi", + (elfhdr.e_flags & EF_ARM_VFP_FLOAT) > 0 ? + "softfp" : "vfp"); + break; + case EM_MIPS: + /* + * this is taken from binutils sources: + * include/elf/mips.h + * mapping is figured out from binutils: + * gas/config/tc-mips.c + */ + switch (elfhdr.e_flags & EF_MIPS_ABI) { + case E_MIPS_ABI_O32: + abi = "o32"; + break; + case E_MIPS_ABI_N32: + abi = "n32"; + break; + default: + if (elfhdr.e_ident[EI_DATA] == + ELFCLASS32) + abi = "o32"; + else if (elfhdr.e_ident[EI_DATA] == + ELFCLASS64) + abi = "n64"; + break; + } + snprintf(dest + strlen(dest), sz - strlen(dest), + ":%s:%s", elf_corres_to_string(endian_corres, + (int)elfhdr.e_ident[EI_DATA]), abi); + break; + } + +cleanup: + if (elf != NULL) + elf_end(elf); + + close(fd); + return (ret); +} + +static int +extract_pkg_static(int fd, char *p, int sz) +{ + struct archive *a; + struct archive_entry *ae; + char *end; + int ret, r; + + ret = -1; + a = archive_read_new(); + if (a == NULL) { + warn("archive_read_new"); + return (ret); + } + archive_read_support_compression_all(a); + archive_read_support_format_tar(a); + + if (lseek(fd, 0, 0) == -1) { + warn("lseek"); + goto cleanup; + } + + if (archive_read_open_fd(a, fd, 4096) != ARCHIVE_OK) { + warnx("archive_read_open_fd: %s", archive_error_string(a)); + goto cleanup; + } + + ae = NULL; + while ((r = archive_read_next_header(a, &ae)) == ARCHIVE_OK) { + end = strrchr(archive_entry_pathname(ae), '/'); + if (end == NULL) + continue; + + if (strcmp(end, "/pkg-static") == 0) { + r = archive_read_extract(a, ae, + ARCHIVE_EXTRACT_OWNER | ARCHIVE_EXTRACT_PERM | + ARCHIVE_EXTRACT_TIME | ARCHIVE_EXTRACT_ACL | + ARCHIVE_EXTRACT_FFLAGS | ARCHIVE_EXTRACT_XATTR); + strlcpy(p, archive_entry_pathname(ae), sz); + break; + } + } + + if (r == ARCHIVE_OK) + ret = 0; + else + warnx("fail to extract pkg-static"); + +cleanup: + archive_read_finish(a); + return (ret); + +} + +static int +install_pkg_static(char *path, char *pkgpath) +{ + int pstat; + pid_t pid; + + switch ((pid = fork())) { + case -1: + return (-1); + case 0: + execl(path, "pkg-static", "add", pkgpath, (char *)NULL); + _exit(1); + default: + break; + } + + while (waitpid(pid, &pstat, 0) == -1) + if (errno != EINTR) + return (-1); + + if (WEXITSTATUS(pstat)) + return (WEXITSTATUS(pstat)); + else if (WIFSIGNALED(pstat)) + return (128 & (WTERMSIG(pstat))); + return (pstat); +} + +static int +bootstrap_pkg(void) +{ + struct url *u; + FILE *remote; + FILE *config; + char *site; + struct dns_srvinfo *mirrors, *current; + /* To store _https._tcp. + hostname + \0 */ + char zone[MAXHOSTNAMELEN + 13]; + char url[MAXPATHLEN]; + char conf[MAXPATHLEN]; + char abi[BUFSIZ]; + char tmppkg[MAXPATHLEN]; + char buf[10240]; + char pkgstatic[MAXPATHLEN]; + int fd, retry, ret, max_retry; + struct url_stat st; + off_t done, r; + time_t now; + time_t last; + + done = 0; + last = 0; + max_retry = 3; + ret = -1; + remote = NULL; + config = NULL; + current = mirrors = NULL; + + printf("Bootstrapping pkg please wait\n"); + + if (pkg_get_myabi(abi, MAXPATHLEN) != 0) { + warnx("failed to determine the system ABI"); + return (-1); + } + + if (getenv("PACKAGESITE") != NULL) + snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz", getenv("PACKAGESITE")); + else + snprintf(url, MAXPATHLEN, "%s/%s/latest/Latest/pkg.txz", + getenv("PACKAGEROOT") ? getenv("PACKAGEROOT") : _PKGS_URL, + getenv("ABI") ? getenv("ABI") : abi); + + snprintf(tmppkg, MAXPATHLEN, "%s/pkg.txz.XXXXXX", + getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP); + + if ((fd = mkstemp(tmppkg)) == -1) { + warn("mkstemp()"); + return (-1); + } + + retry = max_retry; + + u = fetchParseURL(url); + while (remote == NULL) { + if (retry == max_retry) { + if (strcmp(u->scheme, "file") != 0) { + snprintf(zone, sizeof(zone), + "_%s._tcp.%s", u->scheme, u->host); + printf("%s\n", zone); + mirrors = dns_getsrvinfo(zone); + current = mirrors; + } + } + + if (mirrors != NULL) + strlcpy(u->host, current->host, sizeof(u->host)); + + remote = fetchXGet(u, &st, ""); + if (remote == NULL) { + --retry; + if (retry <= 0) + goto fetchfail; + if (mirrors == NULL) { + sleep(1); + } else { + current = current->next; + if (current == NULL) + current = mirrors; + } + } + } + + if (remote == NULL) + goto fetchfail; + + while (done < st.size) { + if ((r = fread(buf, 1, sizeof(buf), remote)) < 1) + break; + + if (write(fd, buf, r) != r) { + warn("write()"); + goto cleanup; + } + + done += r; + now = time(NULL); + if (now > last || done == st.size) + last = now; + } + + if (ferror(remote)) + goto fetchfail; + + if ((ret = extract_pkg_static(fd, pkgstatic, MAXPATHLEN)) == 0) + ret = install_pkg_static(pkgstatic, tmppkg); + + snprintf(conf, MAXPATHLEN, "%s/etc/pkg.conf", + getenv("LOCALBASE") ? getenv("LOCALBASE") : _LOCALBASE); + + if (access(conf, R_OK) == -1) { + site = strrchr(url, '/'); + if (site == NULL) + goto cleanup; + site[0] = '\0'; + site = strrchr(url, '/'); + if (site == NULL) + goto cleanup; + site[0] = '\0'; + + config = fopen(conf, "w+"); + if (config == NULL) + goto cleanup; + fprintf(config, "packagesite: %s\n", url); + fclose(config); + } + + goto cleanup; + +fetchfail: + warnx("Error fetching %s: %s", url, fetchLastErrString); + fprintf(stderr, "A pre-built version of pkg could not be found for your system.\n"); + fprintf(stderr, "Consider changing PACKAGESITE or installing it from ports: 'ports-mgmt/pkg'.\n"); + +cleanup: + if (remote != NULL) + fclose(remote); + close(fd); + unlink(tmppkg); + + return (ret); +} + +static const char confirmation_message[] = +"The package management tool is not yet installed on your system.\n" +"Do you want to fetch and install it now? [y/N]: "; + +static int +pkg_query_yes_no(void) +{ + int ret, c; + + c = getchar(); + + if (c == 'y' || c == 'Y') + ret = 1; + else + ret = 0; + + while (c != '\n' && c != EOF) + c = getchar(); + + return (ret); +} + +int +main(__unused int argc, char *argv[]) +{ + char pkgpath[MAXPATHLEN]; + + snprintf(pkgpath, MAXPATHLEN, "%s/sbin/pkg", + getenv("LOCALBASE") ? getenv("LOCALBASE") : _LOCALBASE); + + if (access(pkgpath, X_OK) == -1) { + /* + * To allow 'pkg -N' to be used as a reliable test for whether + * a system is configured to use pkg, don't bootstrap pkg + * when that argument is given as argv[1]. + */ + if (argv[1] != NULL && strcmp(argv[1], "-N") == 0) + errx(EXIT_FAILURE, "pkg is not installed"); + + /* + * Do not ask for confirmation if either of stdin or stdout is + * not tty. Check the environment to see if user has answer + * tucked in there already. + */ + if (getenv("ASSUME_ALWAYS_YES") == NULL) { + printf("%s", confirmation_message); + if (!isatty(fileno(stdin))) + exit(EXIT_FAILURE); + + if (pkg_query_yes_no() == 0) + exit(EXIT_FAILURE); + } + if (bootstrap_pkg() != 0) + exit(EXIT_FAILURE); + } + + execv(pkgpath, argv); + + /* NOT REACHED */ + return (EXIT_FAILURE); +} |
