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-rw-r--r--src/journal/catalog.c584
1 files changed, 584 insertions, 0 deletions
diff --git a/src/journal/catalog.c b/src/journal/catalog.c
new file mode 100644
index 0000000000..7be0d20f42
--- /dev/null
+++ b/src/journal/catalog.c
@@ -0,0 +1,584 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2012 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <locale.h>
+
+#include "util.h"
+#include "log.h"
+#include "sparse-endian.h"
+#include "sd-id128.h"
+#include "hashmap.h"
+#include "strv.h"
+#include "strbuf.h"
+#include "conf-files.h"
+#include "mkdir.h"
+#include "catalog.h"
+
+static const char * const conf_file_dirs[] = {
+ "/usr/local/lib/systemd/catalog/",
+ "/usr/lib/systemd/catalog/",
+ NULL
+};
+
+#define CATALOG_SIGNATURE (uint8_t[]) { 'R', 'H', 'H', 'H', 'K', 'S', 'L', 'P' }
+
+typedef struct CatalogHeader {
+ uint8_t signature[8]; /* "RHHHKSLP" */
+ le32_t compatible_flags;
+ le32_t incompatible_flags;
+ le32_t header_size;
+ le32_t n_items;
+} CatalogHeader;
+
+typedef struct CatalogItem {
+ sd_id128_t id;
+ char language[32];
+ le32_t offset;
+} CatalogItem;
+
+static unsigned catalog_hash_func(const void *p) {
+ const CatalogItem *i = p;
+
+ assert_cc(sizeof(unsigned) == sizeof(uint8_t)*4);
+
+ return (((unsigned) i->id.bytes[0] << 24) |
+ ((unsigned) i->id.bytes[1] << 16) |
+ ((unsigned) i->id.bytes[2] << 8) |
+ ((unsigned) i->id.bytes[3])) ^
+ (((unsigned) i->id.bytes[4] << 24) |
+ ((unsigned) i->id.bytes[5] << 16) |
+ ((unsigned) i->id.bytes[6] << 8) |
+ ((unsigned) i->id.bytes[7])) ^
+ (((unsigned) i->id.bytes[8] << 24) |
+ ((unsigned) i->id.bytes[9] << 16) |
+ ((unsigned) i->id.bytes[10] << 8) |
+ ((unsigned) i->id.bytes[11])) ^
+ (((unsigned) i->id.bytes[12] << 24) |
+ ((unsigned) i->id.bytes[13] << 16) |
+ ((unsigned) i->id.bytes[14] << 8) |
+ ((unsigned) i->id.bytes[15])) ^
+ string_hash_func(i->language);
+}
+
+static int catalog_compare_func(const void *a, const void *b) {
+ const CatalogItem *i = a, *j = b;
+ unsigned k;
+
+ for (k = 0; k < ELEMENTSOF(j->id.bytes); k++) {
+ if (i->id.bytes[k] < j->id.bytes[k])
+ return -1;
+ if (i->id.bytes[k] > j->id.bytes[k])
+ return 1;
+ }
+
+ return strncmp(i->language, j->language, sizeof(i->language));
+}
+
+static int finish_item(
+ Hashmap *h,
+ struct strbuf *sb,
+ sd_id128_t id,
+ const char *language,
+ const char *payload) {
+
+ ssize_t offset;
+ CatalogItem *i;
+ int r;
+
+ assert(h);
+ assert(sb);
+ assert(payload);
+
+ offset = strbuf_add_string(sb, payload, strlen(payload));
+ if (offset < 0)
+ return log_oom();
+
+ if (offset > 0xFFFFFFFF) {
+ log_error("Too many catalog entries.");
+ return -E2BIG;
+ }
+
+ i = new0(CatalogItem, 1);
+ if (!i)
+ return log_oom();
+
+ i->id = id;
+ strncpy(i->language, language, sizeof(i->language));
+ i->offset = htole32((uint32_t) offset);
+
+ r = hashmap_put(h, i, i);
+ if (r == EEXIST) {
+ log_warning("Duplicate entry for " SD_ID128_FORMAT_STR ".%s, ignoring.", SD_ID128_FORMAT_VAL(id), language ? language : "C");
+ free(i);
+ return 0;
+ }
+
+ return 0;
+}
+
+static int import_file(Hashmap *h, struct strbuf *sb, const char *path) {
+ _cleanup_fclose_ FILE *f = NULL;
+ _cleanup_free_ char *payload = NULL;
+ unsigned n = 0;
+ sd_id128_t id;
+ char language[32];
+ bool got_id = false, empty_line = true;
+ int r;
+
+ assert(h);
+ assert(sb);
+ assert(path);
+
+ f = fopen(path, "re");
+ if (!f) {
+ log_error("Failed to open file %s: %m", path);
+ return -errno;
+ }
+
+ for (;;) {
+ char line[LINE_MAX];
+ size_t a, b, c;
+ char *t;
+
+ if (!fgets(line, sizeof(line), f)) {
+ if (feof(f))
+ break;
+
+ log_error("Failed to read file %s: %m", path);
+ return -errno;
+ }
+
+ n++;
+
+ truncate_nl(line);
+
+ if (line[0] == 0) {
+ empty_line = true;
+ continue;
+ }
+
+ if (strchr(COMMENTS, line[0]))
+ continue;
+
+ if (empty_line &&
+ strlen(line) >= 2+1+32 &&
+ line[0] == '-' &&
+ line[1] == '-' &&
+ line[2] == ' ' &&
+ (line[2+1+32] == ' ' || line[2+1+32] == 0)) {
+
+ bool with_language;
+ sd_id128_t jd;
+
+ /* New entry */
+
+ with_language = line[2+1+32] != 0;
+ line[2+1+32] = 0;
+
+ if (sd_id128_from_string(line + 2 + 1, &jd) >= 0) {
+
+ if (got_id) {
+ r = finish_item(h, sb, id, language, payload);
+ if (r < 0)
+ return r;
+ }
+
+ if (with_language) {
+ t = strstrip(line + 2 + 1 + 32 + 1);
+
+ c = strlen(t);
+ if (c <= 0) {
+ log_error("[%s:%u] Language too short.", path, n);
+ return -EINVAL;
+ }
+ if (c > sizeof(language)) {
+ log_error("[%s:%u] language too long.", path, n);
+ return -EINVAL;
+ }
+
+ strncpy(language, t, sizeof(language));
+ } else
+ zero(language);
+
+ got_id = true;
+ empty_line = false;
+ id = jd;
+
+ if (payload)
+ payload[0] = 0;
+
+ continue;
+ }
+ }
+
+ /* Payload */
+ if (!got_id) {
+ log_error("[%s:%u] Got payload before ID.", path, n);
+ return -EINVAL;
+ }
+
+ a = payload ? strlen(payload) : 0;
+ b = strlen(line);
+
+ c = a + (empty_line ? 1 : 0) + b + 1 + 1;
+ t = realloc(payload, c);
+ if (!t)
+ return log_oom();
+
+ if (empty_line) {
+ t[a] = '\n';
+ memcpy(t + a + 1, line, b);
+ t[a+b+1] = '\n';
+ t[a+b+2] = 0;
+ } else {
+ memcpy(t + a, line, b);
+ t[a+b] = '\n';
+ t[a+b+1] = 0;
+ }
+
+ payload = t;
+ empty_line = false;
+ }
+
+ if (got_id) {
+ r = finish_item(h, sb, id, language, payload);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+int catalog_update(void) {
+ _cleanup_strv_free_ char **files = NULL;
+ _cleanup_fclose_ FILE *w = NULL;
+ _cleanup_free_ char *p = NULL;
+ char **f;
+ Hashmap *h;
+ struct strbuf *sb = NULL;
+ _cleanup_free_ CatalogItem *items = NULL;
+ CatalogItem *i;
+ CatalogHeader header;
+ size_t k;
+ Iterator j;
+ unsigned n;
+ int r;
+
+ h = hashmap_new(catalog_hash_func, catalog_compare_func);
+ if (!h)
+ return -ENOMEM;
+
+ sb = strbuf_new();
+ if (!sb) {
+ r = log_oom();
+ goto finish;
+ }
+
+ r = conf_files_list_strv(&files, ".catalog", (const char **) conf_file_dirs);
+ if (r < 0) {
+ log_error("Failed to get catalog files: %s", strerror(-r));
+ goto finish;
+ }
+
+ STRV_FOREACH(f, files) {
+ log_debug("reading file '%s'", *f);
+ import_file(h, sb, *f);
+ }
+
+ if (hashmap_size(h) <= 0) {
+ log_info("No items in catalog.");
+ r = 0;
+ goto finish;
+ }
+
+ strbuf_complete(sb);
+
+ items = new(CatalogItem, hashmap_size(h));
+ if (!items) {
+ r = log_oom();
+ goto finish;
+ }
+
+ n = 0;
+ HASHMAP_FOREACH(i, h, j) {
+ log_debug("Found " SD_ID128_FORMAT_STR ", language %s", SD_ID128_FORMAT_VAL(i->id), isempty(i->language) ? "C" : i->language);
+ items[n++] = *i;
+ }
+
+ assert(n == hashmap_size(h));
+ qsort(items, n, sizeof(CatalogItem), catalog_compare_func);
+
+ mkdir_p("/var/lib/systemd/catalog", 0775);
+
+ r = fopen_temporary("/var/lib/systemd/catalog/database", &w, &p);
+ if (r < 0) {
+ log_error("Failed to open database for writing: %s", strerror(-r));
+ goto finish;
+ }
+
+ zero(header);
+ memcpy(header.signature, CATALOG_SIGNATURE, sizeof(header.signature));
+ header.header_size = htole32(ALIGN_TO(sizeof(CatalogHeader), 8));
+ header.n_items = htole32(hashmap_size(h));
+
+ k = fwrite(&header, 1, sizeof(header), w);
+ if (k != sizeof(header)) {
+ log_error("Failed to write header.");
+ goto finish;
+ }
+
+ k = fwrite(items, 1, n * sizeof(CatalogItem), w);
+ if (k != n * sizeof(CatalogItem)) {
+ log_error("Failed to write database.");
+ goto finish;
+ }
+
+ k = fwrite(sb->buf, 1, sb->len, w);
+ if (k != sb->len) {
+ log_error("Failed to write strings.");
+ goto finish;
+ }
+
+ fflush(w);
+
+ if (ferror(w)) {
+ log_error("Failed to write database.");
+ goto finish;
+ }
+
+ fchmod(fileno(w), 0644);
+
+ if (rename(p, "/var/lib/systemd/catalog/database") < 0) {
+ log_error("rename() failed: %m");
+ r = -errno;
+ goto finish;
+ }
+
+ free(p);
+ p = NULL;
+
+ r = 0;
+
+finish:
+ hashmap_free_free(h);
+
+ if (sb)
+ strbuf_cleanup(sb);
+
+ if (p)
+ unlink(p);
+
+ return r;
+}
+
+static int open_mmap(int *_fd, struct stat *_st, void **_p) {
+ const CatalogHeader *h;
+ int fd;
+ void *p;
+ struct stat st;
+
+ assert(_fd);
+ assert(_st);
+ assert(_p);
+
+ fd = open("/var/lib/systemd/catalog/database", O_RDONLY|O_CLOEXEC);
+ if (fd < 0)
+ return -errno;
+
+ if (fstat(fd, &st) < 0) {
+ close_nointr_nofail(fd);
+ return -errno;
+ }
+
+ if (st.st_size < (off_t) sizeof(CatalogHeader)) {
+ close_nointr_nofail(fd);
+ return -EINVAL;
+ }
+
+ p = mmap(NULL, PAGE_ALIGN(st.st_size), PROT_READ, MAP_SHARED, fd, 0);
+ if (p == MAP_FAILED) {
+ close_nointr_nofail(fd);
+ return -errno;
+ }
+
+ h = p;
+ if (memcmp(h->signature, CATALOG_SIGNATURE, sizeof(h->signature)) != 0 ||
+ le32toh(h->header_size) < sizeof(CatalogHeader) ||
+ h->incompatible_flags != 0 ||
+ le32toh(h->n_items) <= 0 ||
+ st.st_size < (off_t) (le32toh(h->header_size) + sizeof(CatalogItem) * le32toh(h->n_items))) {
+ close_nointr_nofail(fd);
+ munmap(p, st.st_size);
+ return -EBADMSG;
+ }
+
+ *_fd = fd;
+ *_st = st;
+ *_p = p;
+
+ return 0;
+}
+
+static const char *find_id(void *p, sd_id128_t id) {
+ CatalogItem key, *f = NULL;
+ const CatalogHeader *h = p;
+ const char *loc;
+
+ zero(key);
+ key.id = id;
+
+ loc = setlocale(LC_MESSAGES, NULL);
+ if (loc && loc[0] && !streq(loc, "C") && !streq(loc, "POSIX")) {
+ strncpy(key.language, loc, sizeof(key.language));
+ key.language[strcspn(key.language, ".@")] = 0;
+
+ f = bsearch(&key, (const uint8_t*) p + le32toh(h->header_size), le32toh(h->n_items), sizeof(CatalogItem), catalog_compare_func);
+ if (!f) {
+ char *e;
+
+ e = strchr(key.language, '_');
+ if (e) {
+ *e = 0;
+ f = bsearch(&key, (const uint8_t*) p + le32toh(h->header_size), le32toh(h->n_items), sizeof(CatalogItem), catalog_compare_func);
+ }
+ }
+ }
+
+ if (!f) {
+ zero(key.language);
+ f = bsearch(&key, (const uint8_t*) p + le32toh(h->header_size), le32toh(h->n_items), sizeof(CatalogItem), catalog_compare_func);
+ }
+
+ if (!f)
+ return NULL;
+
+ return (const char*) p +
+ le32toh(h->header_size) +
+ le32toh(h->n_items) * sizeof(CatalogItem) +
+ le32toh(f->offset);
+}
+
+int catalog_get(sd_id128_t id, char **_text) {
+ _cleanup_close_ int fd = -1;
+ void *p = NULL;
+ struct stat st;
+ char *text = NULL;
+ int r;
+ const char *s;
+
+ assert(_text);
+
+ r = open_mmap(&fd, &st, &p);
+ if (r < 0)
+ return r;
+
+ s = find_id(p, id);
+ if (!s) {
+ r = -ENOENT;
+ goto finish;
+ }
+
+ text = strdup(s);
+ if (!text) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ *_text = text;
+ r = 0;
+
+finish:
+ if (p)
+ munmap(p, st.st_size);
+
+ return r;
+}
+
+static char *find_header(const char *s, const char *header) {
+
+ for (;;) {
+ const char *v, *e;
+
+ v = startswith(s, header);
+ if (v) {
+ v += strspn(v, WHITESPACE);
+ return strndup(v, strcspn(v, NEWLINE));
+ }
+
+ /* End of text */
+ e = strchr(s, '\n');
+ if (!e)
+ return NULL;
+
+ /* End of header */
+ if (e == s)
+ return NULL;
+
+ s = e + 1;
+ }
+}
+
+int catalog_list(FILE *f) {
+ _cleanup_close_ int fd = -1;
+ void *p = NULL;
+ struct stat st;
+ const CatalogHeader *h;
+ const CatalogItem *items;
+ int r;
+ unsigned n;
+ sd_id128_t last_id;
+ bool last_id_set = false;
+
+ r = open_mmap(&fd, &st, &p);
+ if (r < 0)
+ return r;
+
+ h = p;
+ items = (const CatalogItem*) ((const uint8_t*) p + le32toh(h->header_size));
+
+ for (n = 0; n < le32toh(h->n_items); n++) {
+ const char *s;
+ _cleanup_free_ char *subject = NULL, *defined_by = NULL;
+
+ if (last_id_set && sd_id128_equal(last_id, items[n].id))
+ continue;
+
+ assert_se(s = find_id(p, items[n].id));
+
+ subject = find_header(s, "Subject:");
+ defined_by = find_header(s, "Defined-By:");
+
+ fprintf(f, SD_ID128_FORMAT_STR " %s: %s\n", SD_ID128_FORMAT_VAL(items[n].id), strna(defined_by), strna(subject));
+
+ last_id_set = true;
+ last_id = items[n].id;
+ }
+
+ munmap(p, st.st_size);
+
+ return 0;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-10 17:06:03 +0000