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freebsd/usr.sbin/pkg/config.c
Pedro F. Giffuni 1de7b4b805 various: general adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.
2017-11-27 15:37:16 +00:00

537 lines
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* 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);
}
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