105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
/* context.c - Alpine Package Keeper (APK)
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*
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* Copyright (C) 2005-2008 Natanael Copa <n@tanael.org>
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* Copyright (C) 2008-2020 Timo Teräs <timo.teras@iki.fi>
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* All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-only
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*/
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#include <errno.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include "apk_context.h"
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void apk_ctx_init(struct apk_ctx *ac)
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{
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memset(ac, 0, sizeof *ac);
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apk_string_array_init(&ac->repository_list);
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apk_trust_init(&ac->trust);
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apk_out_reset(&ac->out);
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ac->out.out = stdout;
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ac->out.err = stderr;
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ac->out.verbosity = 1;
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apk_digest_ctx_init(&ac->dctx, APK_DIGEST_SHA256);
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}
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void apk_ctx_free(struct apk_ctx *ac)
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{
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apk_id_cache_free(&ac->id_cache);
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apk_trust_free(&ac->trust);
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apk_string_array_free(&ac->repository_list);
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if (ac->out.log) fclose(ac->out.log);
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}
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int apk_ctx_prepare(struct apk_ctx *ac)
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{
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if (ac->flags & APK_SIMULATE &&
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ac->open_flags & (APK_OPENF_CREATE | APK_OPENF_WRITE)) {
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ac->open_flags &= ~(APK_OPENF_CREATE | APK_OPENF_WRITE);
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ac->open_flags |= APK_OPENF_READ;
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}
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if (ac->flags & APK_ALLOW_UNTRUSTED) ac->trust.allow_untrusted = 1;
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if (!ac->cache_dir) ac->cache_dir = "etc/apk/cache";
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if (!ac->keys_dir) ac->keys_dir = "etc/apk/keys";
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if (!ac->root) ac->root = "/";
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if (!ac->cache_max_age) ac->cache_max_age = 4*60*60; /* 4 hours default */
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if (!strcmp(ac->root, "/")) {
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// No chroot needed if using system root
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ac->flags |= APK_NO_CHROOT;
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// Check uvol availability
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ac->uvol = getenv("APK_UVOL") ?: "/usr/sbin/uvol";
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if (access(ac->uvol, X_OK) != 0)
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ac->uvol = ERR_PTR(-APKE_UVOL_NOT_AVAILABLE);
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} else {
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ac->uvol = ERR_PTR(-APKE_UVOL_ROOT);
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}
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ac->root_fd = openat(AT_FDCWD, ac->root, O_RDONLY | O_CLOEXEC);
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if (ac->root_fd < 0 && (ac->open_flags & APK_OPENF_CREATE)) {
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mkdirat(AT_FDCWD, ac->root, 0755);
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ac->root_fd = openat(AT_FDCWD, ac->root, O_RDONLY | O_CLOEXEC);
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}
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if (ac->root_fd < 0) {
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apk_err(&ac->out, "Unable to open root: %s", apk_error_str(errno));
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return -errno;
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}
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ac->dest_fd = ac->root_fd;
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if ((ac->open_flags & APK_OPENF_WRITE) && !(ac->flags & APK_NO_LOGFILE)) {
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const char *log_path = "var/log/apk.log";
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const int lflags = O_WRONLY | O_APPEND | O_CREAT | O_CLOEXEC;
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int fd = openat(ac->root_fd, log_path, lflags, 0644);
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if (fd < 0 && (ac->open_flags & APK_OPENF_CREATE)) {
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apk_make_dirs(ac->root_fd, "var/log", 0755, 0755);
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fd = openat(ac->root_fd, log_path, lflags, 0644);
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}
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if (fd < 0) {
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apk_err(&ac->out, "Unable to open log: %s", apk_error_str(errno));
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return -errno;
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}
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ac->out.log = fdopen(fd, "a");
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}
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return 0;
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}
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struct apk_trust *apk_ctx_get_trust(struct apk_ctx *ac)
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{
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if (!ac->trust.keys_loaded) {
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int r = apk_trust_load_keys(&ac->trust,
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openat(ac->root_fd, ac->keys_dir, O_RDONLY | O_CLOEXEC));
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if (r != 0) apk_err(&ac->out, "Unable to load trust keys: %s", apk_error_str(r));
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}
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return &ac->trust;
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}
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struct apk_id_cache *apk_ctx_get_id_cache(struct apk_ctx *ac)
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{
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if (!ac->id_cache.root_fd)
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apk_id_cache_init(&ac->id_cache, apk_ctx_fd_root(ac));
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return &ac->id_cache;
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}
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