freebsd-dev/usr.sbin/pkg/config.c
2016-01-13 17:59:12 +00:00

535 lines
11 KiB
C

/*-
* Copyright (c) 2014 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/sbuf.h>
#include <sys/utsname.h>
#include <sys/sysctl.h>
#include <dirent.h>
#include <ucl.h>
#include <err.h>
#include <errno.h>
#include <stdbool.h>
#include <unistd.h>
#include "config.h"
#define roundup2(x, y) (((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */
struct config_value {
char *value;
STAILQ_ENTRY(config_value) next;
};
struct config_entry {
uint8_t type;
const char *key;
const char *val;
char *value;
STAILQ_HEAD(, config_value) *list;
bool envset;
bool main_only; /* Only set in pkg.conf. */
};
static struct config_entry c[] = {
[PACKAGESITE] = {
PKG_CONFIG_STRING,
"PACKAGESITE",
URL_SCHEME_PREFIX "http://pkg.FreeBSD.org/${ABI}/latest",
NULL,
NULL,
false,
false,
},
[ABI] = {
PKG_CONFIG_STRING,
"ABI",
NULL,
NULL,
NULL,
false,
true,
},
[MIRROR_TYPE] = {
PKG_CONFIG_STRING,
"MIRROR_TYPE",
"SRV",
NULL,
NULL,
false,
false,
},
[ASSUME_ALWAYS_YES] = {
PKG_CONFIG_BOOL,
"ASSUME_ALWAYS_YES",
"NO",
NULL,
NULL,
false,
true,
},
[SIGNATURE_TYPE] = {
PKG_CONFIG_STRING,
"SIGNATURE_TYPE",
NULL,
NULL,
NULL,
false,
false,
},
[FINGERPRINTS] = {
PKG_CONFIG_STRING,
"FINGERPRINTS",
NULL,
NULL,
NULL,
false,
false,
},
[REPOS_DIR] = {
PKG_CONFIG_LIST,
"REPOS_DIR",
NULL,
NULL,
NULL,
false,
true,
},
[PUBKEY] = {
PKG_CONFIG_STRING,
"PUBKEY",
NULL,
NULL,
NULL,
false,
false
}
};
static int
pkg_get_myabi(char *dest, size_t sz)
{
struct utsname uts;
char machine_arch[255];
size_t len;
int error;
error = uname(&uts);
if (error)
return (errno);
len = sizeof(machine_arch);
error = sysctlbyname("hw.machine_arch", machine_arch, &len, NULL, 0);
if (error)
return (errno);
machine_arch[len] = '\0';
/*
* Use __FreeBSD_version rather than kernel version (uts.release) for
* use in jails. This is equivalent to the value of uname -U.
*/
snprintf(dest, sz, "%s:%d:%s", uts.sysname, __FreeBSD_version/100000,
machine_arch);
return (error);
}
static void
subst_packagesite(const char *abi)
{
struct sbuf *newval;
const char *variable_string;
const char *oldval;
if (c[PACKAGESITE].value != NULL)
oldval = c[PACKAGESITE].value;
else
oldval = c[PACKAGESITE].val;
if ((variable_string = strstr(oldval, "${ABI}")) == NULL)
return;
newval = sbuf_new_auto();
sbuf_bcat(newval, oldval, variable_string - oldval);
sbuf_cat(newval, abi);
sbuf_cat(newval, variable_string + strlen("${ABI}"));
sbuf_finish(newval);
free(c[PACKAGESITE].value);
c[PACKAGESITE].value = strdup(sbuf_data(newval));
}
static int
boolstr_to_bool(const char *str)
{
if (str != NULL && (strcasecmp(str, "true") == 0 ||
strcasecmp(str, "yes") == 0 || strcasecmp(str, "on") == 0 ||
str[0] == '1'))
return (true);
return (false);
}
static void
config_parse(const ucl_object_t *obj, pkg_conf_file_t conftype)
{
struct sbuf *buf = sbuf_new_auto();
const ucl_object_t *cur, *seq;
ucl_object_iter_t it = NULL, itseq = NULL;
struct config_entry *temp_config;
struct config_value *cv;
const char *key;
int i;
size_t j;
/* Temporary config for configs that may be disabled. */
temp_config = calloc(CONFIG_SIZE, sizeof(struct config_entry));
while ((cur = ucl_iterate_object(obj, &it, true))) {
key = ucl_object_key(cur);
if (key == NULL)
continue;
sbuf_clear(buf);
if (conftype == CONFFILE_PKG) {
for (j = 0; j < strlen(key); ++j)
sbuf_putc(buf, key[j]);
sbuf_finish(buf);
} else if (conftype == CONFFILE_REPO) {
if (strcasecmp(key, "url") == 0)
sbuf_cpy(buf, "PACKAGESITE");
else if (strcasecmp(key, "mirror_type") == 0)
sbuf_cpy(buf, "MIRROR_TYPE");
else if (strcasecmp(key, "signature_type") == 0)
sbuf_cpy(buf, "SIGNATURE_TYPE");
else if (strcasecmp(key, "fingerprints") == 0)
sbuf_cpy(buf, "FINGERPRINTS");
else if (strcasecmp(key, "pubkey") == 0)
sbuf_cpy(buf, "PUBKEY");
else if (strcasecmp(key, "enabled") == 0) {
if ((cur->type != UCL_BOOLEAN) ||
!ucl_object_toboolean(cur))
goto cleanup;
} else
continue;
sbuf_finish(buf);
}
for (i = 0; i < CONFIG_SIZE; i++) {
if (strcmp(sbuf_data(buf), c[i].key) == 0)
break;
}
/* Silently skip unknown keys to be future compatible. */
if (i == CONFIG_SIZE)
continue;
/* env has priority over config file */
if (c[i].envset)
continue;
/* Parse sequence value ["item1", "item2"] */
switch (c[i].type) {
case PKG_CONFIG_LIST:
if (cur->type != UCL_ARRAY) {
warnx("Skipping invalid array "
"value for %s.\n", c[i].key);
continue;
}
temp_config[i].list =
malloc(sizeof(*temp_config[i].list));
STAILQ_INIT(temp_config[i].list);
while ((seq = ucl_iterate_object(cur, &itseq, true))) {
if (seq->type != UCL_STRING)
continue;
cv = malloc(sizeof(struct config_value));
cv->value =
strdup(ucl_object_tostring(seq));
STAILQ_INSERT_TAIL(temp_config[i].list, cv,
next);
}
break;
case PKG_CONFIG_BOOL:
temp_config[i].value =
strdup(ucl_object_toboolean(cur) ? "yes" : "no");
break;
default:
/* Normal string value. */
temp_config[i].value = strdup(ucl_object_tostring(cur));
break;
}
}
/* Repo is enabled, copy over all settings from temp_config. */
for (i = 0; i < CONFIG_SIZE; i++) {
if (c[i].envset)
continue;
/* Prevent overriding ABI, ASSUME_ALWAYS_YES, etc. */
if (conftype != CONFFILE_PKG && c[i].main_only == true)
continue;
switch (c[i].type) {
case PKG_CONFIG_LIST:
c[i].list = temp_config[i].list;
break;
default:
c[i].value = temp_config[i].value;
break;
}
}
cleanup:
free(temp_config);
sbuf_delete(buf);
}
/*-
* Parse new repo style configs in style:
* Name:
* URL:
* MIRROR_TYPE:
* etc...
*/
static void
parse_repo_file(ucl_object_t *obj)
{
ucl_object_iter_t it = NULL;
const ucl_object_t *cur;
const char *key;
while ((cur = ucl_iterate_object(obj, &it, true))) {
key = ucl_object_key(cur);
if (key == NULL)
continue;
if (cur->type != UCL_OBJECT)
continue;
config_parse(cur, CONFFILE_REPO);
}
}
static int
read_conf_file(const char *confpath, pkg_conf_file_t conftype)
{
struct ucl_parser *p;
ucl_object_t *obj = NULL;
p = ucl_parser_new(0);
if (!ucl_parser_add_file(p, confpath)) {
if (errno != ENOENT)
errx(EXIT_FAILURE, "Unable to parse configuration "
"file %s: %s", confpath, ucl_parser_get_error(p));
ucl_parser_free(p);
/* no configuration present */
return (1);
}
obj = ucl_parser_get_object(p);
if (obj->type != UCL_OBJECT)
warnx("Invalid configuration format, ignoring the "
"configuration file %s", confpath);
else {
if (conftype == CONFFILE_PKG)
config_parse(obj, conftype);
else if (conftype == CONFFILE_REPO)
parse_repo_file(obj);
}
ucl_object_unref(obj);
ucl_parser_free(p);
return (0);
}
static int
load_repositories(const char *repodir)
{
struct dirent *ent;
DIR *d;
char *p;
size_t n;
char path[MAXPATHLEN];
int ret;
ret = 0;
if ((d = opendir(repodir)) == NULL)
return (1);
while ((ent = readdir(d))) {
/* Trim out 'repos'. */
if ((n = strlen(ent->d_name)) <= 5)
continue;
p = &ent->d_name[n - 5];
if (strcmp(p, ".conf") == 0) {
snprintf(path, sizeof(path), "%s%s%s",
repodir,
repodir[strlen(repodir) - 1] == '/' ? "" : "/",
ent->d_name);
if (access(path, F_OK) == 0 &&
read_conf_file(path, CONFFILE_REPO)) {
ret = 1;
goto cleanup;
}
}
}
cleanup:
closedir(d);
return (ret);
}
int
config_init(void)
{
char *val;
int i;
const char *localbase;
char *env_list_item;
char confpath[MAXPATHLEN];
struct config_value *cv;
char abi[BUFSIZ];
for (i = 0; i < CONFIG_SIZE; i++) {
val = getenv(c[i].key);
if (val != NULL) {
c[i].envset = true;
switch (c[i].type) {
case PKG_CONFIG_LIST:
/* Split up comma-separated items from env. */
c[i].list = malloc(sizeof(*c[i].list));
STAILQ_INIT(c[i].list);
for (env_list_item = strtok(val, ",");
env_list_item != NULL;
env_list_item = strtok(NULL, ",")) {
cv =
malloc(sizeof(struct config_value));
cv->value =
strdup(env_list_item);
STAILQ_INSERT_TAIL(c[i].list, cv,
next);
}
break;
default:
c[i].val = val;
break;
}
}
}
/* Read LOCALBASE/etc/pkg.conf first. */
localbase = getenv("LOCALBASE") ? getenv("LOCALBASE") : _LOCALBASE;
snprintf(confpath, sizeof(confpath), "%s/etc/pkg.conf",
localbase);
if (access(confpath, F_OK) == 0 && read_conf_file(confpath,
CONFFILE_PKG))
goto finalize;
/* Then read in all repos from REPOS_DIR list of directories. */
if (c[REPOS_DIR].list == NULL) {
c[REPOS_DIR].list = malloc(sizeof(*c[REPOS_DIR].list));
STAILQ_INIT(c[REPOS_DIR].list);
cv = malloc(sizeof(struct config_value));
cv->value = strdup("/etc/pkg");
STAILQ_INSERT_TAIL(c[REPOS_DIR].list, cv, next);
cv = malloc(sizeof(struct config_value));
if (asprintf(&cv->value, "%s/etc/pkg/repos", localbase) < 0)
goto finalize;
STAILQ_INSERT_TAIL(c[REPOS_DIR].list, cv, next);
}
STAILQ_FOREACH(cv, c[REPOS_DIR].list, next)
if (load_repositories(cv->value))
goto finalize;
finalize:
if (c[ABI].val == NULL && c[ABI].value == NULL) {
if (pkg_get_myabi(abi, BUFSIZ) != 0)
errx(EXIT_FAILURE, "Failed to determine the system "
"ABI");
c[ABI].val = abi;
}
subst_packagesite(c[ABI].value != NULL ? c[ABI].value : c[ABI].val);
return (0);
}
int
config_string(pkg_config_key k, const char **val)
{
if (c[k].type != PKG_CONFIG_STRING)
return (-1);
if (c[k].value != NULL)
*val = c[k].value;
else
*val = c[k].val;
return (0);
}
int
config_bool(pkg_config_key k, bool *val)
{
const char *value;
if (c[k].type != PKG_CONFIG_BOOL)
return (-1);
*val = false;
if (c[k].value != NULL)
value = c[k].value;
else
value = c[k].val;
if (boolstr_to_bool(value))
*val = true;
return (0);
}
void
config_finish(void) {
int i;
for (i = 0; i < CONFIG_SIZE; i++)
free(c[i].value);
}