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freebsd-dev/usr.sbin/pkg/pkg.c
Bryan Drewery f12db248e7 Support checking signature for pkg bootstrap. 
If the pkg.conf is configured with SIGNATURE_TYPE: FINGERPRINTS,
and FINGERPRINTS: /etc/keys/pkg then a pkg.sig file is fetched along
with pkg.txz. The signature contains the signature provided by the
signing server, and the public key. The .sig is the exact output
from the signing server in the following format:

  SIGNATURE
  <openssl signed>
  CERT
  <rsa public key>
  END

The signature is verified with the following logic:

 - If the .sig file is missing, it fails.
 - If the .sig doesn't validate, it fails.
 - If the public key in the .sig is not in the known trusted fingerprints,
   it fails.
 - If the public key is in the revoked key list, it fails.

Approved by:	bapt
MFC after:	2 days
Discussed by:	bapt with des, jonathan, gavin
2013-10-26 03:43:02 +00:00

910 lines
19 KiB
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/*-
* Copyright (c) 2012-2013 Baptiste Daroussin <bapt@FreeBSD.org>
* Copyright (c) 2013 Bryan Drewery <bdrewery@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/queue.h>
#include <sys/types.h>
#include <sys/sbuf.h>
#include <sys/wait.h>
#define _WITH_GETLINE
#include <archive.h>
#include <archive_entry.h>
#include <dirent.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fetch.h>
#include <paths.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <yaml.h>
#include <openssl/err.h>
#include <openssl/ssl.h>
#include "dns_utils.h"
#include "config.h"
struct sig_cert {
unsigned char *sig;
int siglen;
unsigned char *cert;
int certlen;
bool trusted;
};
typedef enum {
HASH_UNKNOWN,
HASH_SHA256,
} hash_t;
struct fingerprint {
hash_t type;
char hash[BUFSIZ];
STAILQ_ENTRY(fingerprint) next;
};
STAILQ_HEAD(fingerprint_list, fingerprint);
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_filter_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_free(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
fetch_to_fd(const char *url, char *path)
{
struct url *u;
struct dns_srvinfo *mirrors, *current;
struct url_stat st;
FILE *remote;
/* To store _https._tcp. + hostname + \0 */
int fd;
int retry, max_retry;
off_t done, r;
time_t now, last;
char buf[10240];
char zone[MAXHOSTNAMELEN + 13];
static const char *mirror_type = NULL;
done = 0;
last = 0;
max_retry = 3;
current = mirrors = NULL;
remote = NULL;
if (mirror_type == NULL && config_string(MIRROR_TYPE, &mirror_type)
!= 0) {
warnx("No MIRROR_TYPE defined");
return (-1);
}
if ((fd = mkstemp(path)) == -1) {
warn("mkstemp()");
return (-1);
}
retry = max_retry;
u = fetchParseURL(url);
while (remote == NULL) {
if (retry == max_retry) {
if (strcmp(u->scheme, "file") != 0 &&
strcasecmp(mirror_type, "srv") == 0) {
snprintf(zone, sizeof(zone),
"_%s._tcp.%s", u->scheme, u->host);
mirrors = dns_getsrvinfo(zone);
current = mirrors;
}
}
if (mirrors != NULL) {
strlcpy(u->host, current->host, sizeof(u->host));
u->port = current->port;
}
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 fetchfail;
}
done += r;
now = time(NULL);
if (now > last || done == st.size)
last = now;
}
if (ferror(remote))
goto fetchfail;
goto cleanup;
fetchfail:
if (fd != -1) {
close(fd);
fd = -1;
unlink(path);
}
cleanup:
if (remote != NULL)
fclose(remote);
return fd;
}
static struct fingerprint *
parse_fingerprint(yaml_document_t *doc, yaml_node_t *node)
{
yaml_node_pair_t *pair;
yaml_char_t *function, *fp;
struct fingerprint *f;
hash_t fct = HASH_UNKNOWN;
function = fp = NULL;
pair = node->data.mapping.pairs.start;
while (pair < node->data.mapping.pairs.top) {
yaml_node_t *key = yaml_document_get_node(doc, pair->key);
yaml_node_t *val = yaml_document_get_node(doc, pair->value);
if (key->data.scalar.length <= 0) {
++pair;
continue;
}
if (val->type != YAML_SCALAR_NODE) {
++pair;
continue;
}
if (strcasecmp(key->data.scalar.value, "function") == 0)
function = val->data.scalar.value;
else if (strcasecmp(key->data.scalar.value, "fingerprint")
== 0)
fp = val->data.scalar.value;
++pair;
continue;
}
if (fp == NULL || function == NULL)
return (NULL);
if (strcasecmp(function, "sha256") == 0)
fct = HASH_SHA256;
if (fct == HASH_UNKNOWN) {
fprintf(stderr, "Unsupported hashing function: %s\n", function);
return (NULL);
}
f = calloc(1, sizeof(struct fingerprint));
f->type = fct;
strlcpy(f->hash, fp, sizeof(f->hash));
return (f);
}
static struct fingerprint *
load_fingerprint(const char *dir, const char *filename)
{
yaml_parser_t parser;
yaml_document_t doc;
yaml_node_t *node;
FILE *fp;
struct fingerprint *f;
char path[MAXPATHLEN];
f = NULL;
snprintf(path, MAXPATHLEN, "%s/%s", dir, filename);
if ((fp = fopen(path, "r")) == NULL)
return (NULL);
yaml_parser_initialize(&parser);
yaml_parser_set_input_file(&parser, fp);
yaml_parser_load(&parser, &doc);
node = yaml_document_get_root_node(&doc);
if (node == NULL || node->type != YAML_MAPPING_NODE)
goto out;
f = parse_fingerprint(&doc, node);
out:
yaml_document_delete(&doc);
yaml_parser_delete(&parser);
fclose(fp);
return (f);
}
static struct fingerprint_list *
load_fingerprints(const char *path, int *count)
{
DIR *d;
struct dirent *ent;
struct fingerprint *finger;
struct fingerprint_list *fingerprints;
*count = 0;
fingerprints = calloc(1, sizeof(struct fingerprint_list));
if (fingerprints == NULL)
return (NULL);
STAILQ_INIT(fingerprints);
if ((d = opendir(path)) == NULL)
return (NULL);
while ((ent = readdir(d))) {
if (strcmp(ent->d_name, ".") == 0 ||
strcmp(ent->d_name, "..") == 0)
continue;
finger = load_fingerprint(path, ent->d_name);
if (finger != NULL) {
STAILQ_INSERT_TAIL(fingerprints, finger, next);
++(*count);
}
}
closedir(d);
return (fingerprints);
}
static void
sha256_hash(unsigned char hash[SHA256_DIGEST_LENGTH],
char out[SHA256_DIGEST_LENGTH * 2 + 1])
{
int i;
for (i = 0; i < SHA256_DIGEST_LENGTH; i++)
sprintf(out + (i * 2), "%02x", hash[i]);
out[SHA256_DIGEST_LENGTH * 2] = '\0';
}
static void
sha256_buf(char *buf, size_t len, char out[SHA256_DIGEST_LENGTH * 2 + 1])
{
unsigned char hash[SHA256_DIGEST_LENGTH];
SHA256_CTX sha256;
out[0] = '\0';
SHA256_Init(&sha256);
SHA256_Update(&sha256, buf, len);
SHA256_Final(hash, &sha256);
sha256_hash(hash, out);
}
static int
sha256_fd(int fd, char out[SHA256_DIGEST_LENGTH * 2 + 1])
{
int my_fd;
FILE *fp;
char buffer[BUFSIZ];
unsigned char hash[SHA256_DIGEST_LENGTH];
size_t r;
int ret;
SHA256_CTX sha256;
my_fd = -1;
fp = NULL;
r = 0;
ret = 1;
out[0] = '\0';
/* Duplicate the fd so that fclose(3) does not close it. */
if ((my_fd = dup(fd)) == -1) {
warnx("dup");
goto cleanup;
}
if ((fp = fdopen(my_fd, "rb")) == NULL) {
warnx("fdopen");
goto cleanup;
}
SHA256_Init(&sha256);
while ((r = fread(buffer, 1, BUFSIZ, fp)) > 0)
SHA256_Update(&sha256, buffer, r);
if (ferror(fp) != 0) {
warnx("fread");
goto cleanup;
}
SHA256_Final(hash, &sha256);
sha256_hash(hash, out);
ret = 0;
cleanup:
if (fp != NULL)
fclose(fp);
else if (my_fd != -1)
close(my_fd);
(void)lseek(fd, 0, SEEK_SET);
return (ret);
}
static EVP_PKEY *
load_public_key_buf(const unsigned char *cert, int certlen)
{
EVP_PKEY *pkey;
BIO *bp;
char errbuf[1024];
bp = BIO_new_mem_buf((void *)cert, certlen);
if ((pkey = PEM_read_bio_PUBKEY(bp, NULL, NULL, NULL)) == NULL)
warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
BIO_free(bp);
return (pkey);
}
static bool
rsa_verify_cert(int fd, const unsigned char *key, int keylen,
unsigned char *sig, int siglen)
{
EVP_MD_CTX *mdctx;
EVP_PKEY *pkey;
char sha256[(SHA256_DIGEST_LENGTH * 2) + 2];
char errbuf[1024];
bool ret;
pkey = NULL;
mdctx = NULL;
ret = false;
/* Compute SHA256 of the package. */
if (lseek(fd, 0, 0) == -1) {
warn("lseek");
goto cleanup;
}
if ((sha256_fd(fd, sha256)) == -1) {
warnx("Error creating SHA256 hash for package");
goto cleanup;
}
if ((pkey = load_public_key_buf(key, keylen)) == NULL) {
warnx("Error reading public key");
goto cleanup;
}
/* Verify signature of the SHA256(pkg) is valid. */
printf("Verifying signature... ");
if ((mdctx = EVP_MD_CTX_create()) == NULL) {
warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
goto error;
}
if (EVP_DigestVerifyInit(mdctx, NULL, EVP_sha256(), NULL, pkey) != 1) {
warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
goto error;
}
if (EVP_DigestVerifyUpdate(mdctx, sha256, strlen(sha256)) != 1) {
warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
goto error;
}
if (EVP_DigestVerifyFinal(mdctx, sig, siglen) != 1) {
warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
goto error;
}
ret = true;
printf("done\n");
goto cleanup;
error:
printf("failed\n");
cleanup:
if (pkey)
EVP_PKEY_free(pkey);
if (mdctx)
EVP_MD_CTX_destroy(mdctx);
ERR_free_strings();
return (ret);
}
static struct sig_cert *
parse_cert(int fd) {
int my_fd;
struct sig_cert *sc;
FILE *fp;
struct sbuf *buf, *sig, *cert;
char *line;
size_t linecap;
ssize_t linelen;
my_fd = -1;
sc = NULL;
line = NULL;
linecap = 0;
if (lseek(fd, 0, 0) == -1) {
warn("lseek");
return (NULL);
}
/* Duplicate the fd so that fclose(3) does not close it. */
if ((my_fd = dup(fd)) == -1) {
warnx("dup");
return (NULL);
}
if ((fp = fdopen(my_fd, "rb")) == NULL) {
warn("fdopen");
close(my_fd);
return (NULL);
}
sig = sbuf_new_auto();
cert = sbuf_new_auto();
while ((linelen = getline(&line, &linecap, fp)) > 0) {
if (strcmp(line, "SIGNATURE\n") == 0) {
buf = sig;
continue;
} else if (strcmp(line, "CERT\n") == 0) {
buf = cert;
continue;
} else if (strcmp(line, "END\n") == 0) {
break;
}
if (buf != NULL)
sbuf_bcat(buf, line, linelen);
}
fclose(fp);
/* Trim out unrelated trailing newline */
sbuf_setpos(sig, sbuf_len(sig) - 1);
sbuf_finish(sig);
sbuf_finish(cert);
sc = calloc(1, sizeof(struct sig_cert));
sc->siglen = sbuf_len(sig);
sc->sig = calloc(1, sc->siglen);
memcpy(sc->sig, sbuf_data(sig), sc->siglen);
sc->certlen = sbuf_len(cert);
sc->cert = strdup(sbuf_data(cert));
sbuf_delete(sig);
sbuf_delete(cert);
return (sc);
}
static bool
verify_signature(int fd_pkg, int fd_sig)
{
struct fingerprint_list *trusted, *revoked;
struct fingerprint *fingerprint;
struct sig_cert *sc;
bool ret;
int trusted_count, revoked_count;
const char *fingerprints;
char path[MAXPATHLEN];
char hash[SHA256_DIGEST_LENGTH * 2 + 1];
trusted = revoked = NULL;
ret = false;
/* Read and parse fingerprints. */
if (config_string(FINGERPRINTS, &fingerprints) != 0) {
warnx("No CONFIG_FINGERPRINTS defined");
goto cleanup;
}
snprintf(path, MAXPATHLEN, "%s/trusted", fingerprints);
if ((trusted = load_fingerprints(path, &trusted_count)) == NULL) {
warnx("Error loading trusted certificates");
goto cleanup;
}
if (trusted_count == 0 || trusted == NULL) {
fprintf(stderr, "No trusted certificates found.\n");
goto cleanup;
}
snprintf(path, MAXPATHLEN, "%s/revoked", fingerprints);
if ((revoked = load_fingerprints(path, &revoked_count)) == NULL) {
warnx("Error loading revoked certificates");
goto cleanup;
}
/* Read certificate and signature in. */
if ((sc = parse_cert(fd_sig)) == NULL) {
warnx("Error parsing certificate");
goto cleanup;
}
/* Explicitly mark as non-trusted until proven otherwise. */
sc->trusted = false;
/* Parse signature and pubkey out of the certificate */
sha256_buf(sc->cert, sc->certlen, hash);
/* Check if this hash is revoked */
if (revoked != NULL) {
STAILQ_FOREACH(fingerprint, revoked, next) {
if (strcasecmp(fingerprint->hash, hash) == 0) {
fprintf(stderr, "The certificate has been "
"revoked\n");
goto cleanup;
}
}
}
STAILQ_FOREACH(fingerprint, trusted, next) {
if (strcasecmp(fingerprint->hash, hash) == 0) {
sc->trusted = true;
break;
}
}
if (sc->trusted == false) {
fprintf(stderr, "No trusted certificate found matching "
"package's certificate\n");
goto cleanup;
}
/* Verify the signature. */
if (rsa_verify_cert(fd_pkg, sc->cert, sc->certlen, sc->sig,
sc->siglen) == false) {
fprintf(stderr, "Signature is not valid\n");
goto cleanup;
}
ret = true;
cleanup:
if (trusted) {
STAILQ_FOREACH(fingerprint, trusted, next)
free(fingerprint);
free(trusted);
}
if (revoked) {
STAILQ_FOREACH(fingerprint, revoked, next)
free(fingerprint);
free(revoked);
}
if (sc) {
if (sc->cert)
free(sc->cert);
if (sc->sig)
free(sc->sig);
free(sc);
}
return (ret);
}
static int
bootstrap_pkg(void)
{
FILE *config;
int fd_pkg, fd_sig;
int ret;
char *site;
char url[MAXPATHLEN];
char conf[MAXPATHLEN];
char tmppkg[MAXPATHLEN];
char tmpsig[MAXPATHLEN];
const char *packagesite;
const char *signature_type;
char pkgstatic[MAXPATHLEN];
fd_sig = -1;
ret = -1;
config = NULL;
if (config_string(PACKAGESITE, &packagesite) != 0) {
warnx("No PACKAGESITE defined");
return (-1);
}
if (config_string(SIGNATURE_TYPE, &signature_type) != 0) {
warnx("Error looking up SIGNATURE_TYPE");
return (-1);
}
printf("Bootstrapping pkg from %s, please wait...\n", packagesite);
/* Support pkg+http:// for PACKAGESITE which is the new format
in 1.2 to avoid confusion on why http://pkg.FreeBSD.org has
no A record. */
if (strncmp(URL_SCHEME_PREFIX, packagesite,
strlen(URL_SCHEME_PREFIX)) == 0)
packagesite += strlen(URL_SCHEME_PREFIX);
snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz", packagesite);
snprintf(tmppkg, MAXPATHLEN, "%s/pkg.txz.XXXXXX",
getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP);
if ((fd_pkg = fetch_to_fd(url, tmppkg)) == -1)
goto fetchfail;
if (signature_type != NULL &&
strcasecmp(signature_type, "FINGERPRINTS") == 0) {
snprintf(tmpsig, MAXPATHLEN, "%s/pkg.txz.sig.XXXXXX",
getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP);
snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz.sig",
packagesite);
if ((fd_sig = fetch_to_fd(url, tmpsig)) == -1) {
fprintf(stderr, "Signature for pkg not available.\n");
goto fetchfail;
}
if (verify_signature(fd_pkg, fd_sig) == false)
goto cleanup;
}
if ((ret = extract_pkg_static(fd_pkg, 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 (fd_sig != -1) {
close(fd_sig);
unlink(tmpsig);
}
close(fd_pkg);
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];
char pkgstatic[MAXPATHLEN];
bool yes = false;
int fd, ret;
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");
if (argc > 2 && strcmp(argv[1], "add") == 0 &&
access(argv[2], R_OK) == 0) {
fd = open(argv[2], O_RDONLY);
if (fd == -1)
err(EXIT_FAILURE, "Unable to open %s", argv[2]);
if ((ret = extract_pkg_static(fd, pkgstatic, MAXPATHLEN)) == 0)
ret = install_pkg_static(pkgstatic, argv[2]);
close(fd);
if (ret != 0)
exit(EXIT_FAILURE);
exit(EXIT_SUCCESS);
}
/*
* 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.
*/
config_init();
config_bool(ASSUME_ALWAYS_YES, &yes);
if (!yes) {
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);
config_finish();
}
execv(pkgpath, argv);
/* NOT REACHED */
return (EXIT_FAILURE);
}
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