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-rw-r--r--src/catman.c448
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diff --git a/src/catman.c b/src/catman.c
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+/*
+ * catman.c: create and/or update cat files
+ *
+ * Copyright (C) 1994, 1995 Graeme W. Wilford. (Wilf.)
+ * Copyright (C) 2001, 2002, 2003, 2006, 2007, 2008, 2009, 2010, 2011
+ * Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Thu Dec 8 00:03:12 GMT 1994 Wilf. (G.Wilford@ee.surrey.ac.uk)
+ */
+
+/* MAX_ARGS must be >= 7, 5 for options, 1 for page and 1 for NULL */
+#define MAX_ARGS 1024
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <assert.h>
+#include <sys/types.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <limits.h>
+
+#ifndef NAME_MAX
+# if defined(_POSIX_VERSION) && defined(_POSIX_NAME_MAX)
+# define NAME_MAX _POSIX_NAME_MAX
+# else /* !_POSIX_VERSION */
+# ifdef MAXNAMLEN
+# define NAME_MAX MAXNAMLEN
+# else /* !MAXNAMLEN */
+# define NAME_MAX 255 /* default to max */
+# endif /* MAXNAMLEN */
+# endif /* _POSIX_VERSION */
+#endif /* !NAME_MAX */
+
+#ifndef ARG_MAX
+# if defined(_POSIX_VERSION) && defined(_POSIX_ARG_MAX)
+# define ARG_MAX _POSIX_ARG_MAX
+# else /* !_POSIX_VERSION */
+# define ARG_MAX 4096 /* default to min */
+# endif /* _POSIX_VERSION */
+#endif /* !ARG_MAX */
+
+#include "argp.h"
+#include "error.h"
+#include "gl_list.h"
+#include "progname.h"
+#include "xalloc.h"
+
+#include "gettext.h"
+#include <locale.h>
+#define _(String) gettext (String)
+#define N_(String) gettext_noop (String)
+
+#include "manconfig.h"
+
+#include "appendstr.h"
+#include "cleanup.h"
+#include "debug.h"
+#include "fatal.h"
+#include "filenames.h"
+#include "glcontainers.h"
+#include "pipeline.h"
+#include "util.h"
+
+#include "mydbm.h"
+#include "db_storage.h"
+
+#include "manp.h"
+
+/* globals */
+int quiet = 1;
+MYDBM_FILE dbf_close_post_fork;
+char *manp;
+extern char *user_config_file;
+
+static const char **sections;
+
+const char *argp_program_version = "catman " PACKAGE_VERSION;
+const char *argp_program_bug_address = PACKAGE_BUGREPORT;
+error_t argp_err_exit_status = FAIL;
+
+static const char args_doc[] = N_("[SECTION...]");
+
+static struct argp_option options[] = {
+ OPT ("debug", 'd', 0, N_("emit debugging messages")),
+ OPT ("manpath", 'M', N_("PATH"),
+ N_("set search path for manual pages to PATH")),
+ OPT ("config-file", 'C', N_("FILE"),
+ N_("use this user configuration file")),
+ OPT_HELP_COMPAT,
+ { 0 }
+};
+
+static error_t parse_opt (int key, char *arg, struct argp_state *state)
+{
+ char *mansect;
+
+ switch (key) {
+ case 'd':
+ debug_level = true;
+ return 0;
+ case 'M':
+ manp = arg;
+ return 0;
+ case 'C':
+ user_config_file = arg;
+ return 0;
+ case 'h':
+ argp_state_help (state, state->out_stream,
+ ARGP_HELP_STD_HELP);
+ break;
+ case ARGP_KEY_ARGS:
+ sections = xmalloc ((state->argc - state->next + 1) *
+ sizeof *sections);
+ memcpy (sections, state->argv + state->next,
+ (state->argc - state->next) *
+ sizeof *sections);
+ sections[state->argc - state->next] = NULL;
+ return 0;
+ case ARGP_KEY_NO_ARGS:
+ mansect = getenv ("MANSECT");
+ if (mansect && *mansect) {
+ /* MANSECT contains sections */
+ const char *sec;
+ int i = 0;
+
+ mansect = xstrdup (mansect);
+ sections = NULL;
+ for (sec = strtok (mansect, ":"); sec;
+ sec = strtok (NULL, ":")) {
+ sections = xnrealloc
+ (sections, i + 2,
+ sizeof *sections);
+ sections[i++] = sec;
+ }
+ if (sections)
+ sections[i] = NULL;
+ free (mansect);
+ } else {
+ /* use default sections */
+ static const char *std_sections[] =
+ STD_SECTIONS;
+ sections = std_sections;
+ }
+ return 0;
+ }
+ return ARGP_ERR_UNKNOWN;
+}
+
+static struct argp argp = { options, parse_opt, args_doc };
+
+static char *locale;
+
+static gl_list_t manpathlist;
+
+static void post_fork (void)
+{
+ pop_all_cleanups ();
+ MYDBM_FREE (dbf_close_post_fork);
+}
+
+/* Execute man with the appropriate catman args. Always frees cmd. */
+static void catman (pipecmd *cmd)
+{
+ pipeline *p;
+ int status;
+
+ if (debug_level) {
+ /* just show the command, but don't execute it */
+ fputs ("man command = ", stderr);
+ pipecmd_dump (cmd, stderr);
+ putc ('\n', stderr);
+ pipecmd_free (cmd);
+ return;
+ }
+
+ p = pipeline_new_commands (cmd, (void *) 0);
+ status = pipeline_run (p);
+ if (status)
+ error (CHILD_FAIL, 0,
+ _("man command failed with exit status %d"), status);
+}
+
+/* Add key to this command, stripping off tab-and-following if necessary.
+ * Return length of argument.
+ */
+static size_t add_arg (pipecmd *cmd, datum key)
+{
+ char *tab;
+ size_t len;
+
+ tab = strrchr (MYDBM_DPTR (key), '\t');
+ if (tab == MYDBM_DPTR (key))
+ tab = NULL;
+
+ if (tab)
+ *tab = '\0';
+ pipecmd_arg (cmd, MYDBM_DPTR (key));
+ len = strlen (MYDBM_DPTR (key));
+ debug ("key: '%s' (%zu), len: %zu\n",
+ MYDBM_DPTR (key), (size_t) MYDBM_DSIZE (key), len);
+ if (tab)
+ *tab = '\t';
+
+ return len;
+}
+
+/* find all pages that are in the supplied manpath and section and that are
+ ultimate source files. */
+static int parse_for_sec (MYDBM_FILE dbf,
+ const char *manpath, const char *section)
+{
+ pipecmd *basecmd, *cmd;
+ datum key;
+ size_t arg_size, initial_bit;
+ bool message = true;
+ int first_arg;
+
+ basecmd = pipecmd_new (MAN);
+ pipecmd_clearenv (basecmd);
+
+ /* As we supply a NULL environment to save precious execve() space,
+ we must also supply a locale if necessary */
+ if (locale) {
+ pipecmd_args (basecmd, "-L", locale, (void *) 0);
+ initial_bit = sizeof "-L" + strlen (locale) + 1;
+ } else
+ initial_bit = 0;
+
+ pipecmd_args (basecmd, "-caM", manpath, (void *) 0); /* manpath */
+ pipecmd_args (basecmd, "-S", section, (void *) 0); /* section */
+
+ initial_bit += sizeof MAN + sizeof "-caM" +
+ strlen (manpath) + strlen (section) + 2;
+
+ cmd = pipecmd_dup (basecmd);
+ first_arg = pipecmd_get_nargs (cmd);
+
+ arg_size = initial_bit;
+ key = MYDBM_FIRSTKEY (dbf);
+
+ while (MYDBM_DPTR (key) != NULL) {
+ datum nextkey;
+
+ /* ignore db identifier keys */
+#pragma GCC diagnostic push
+#if GNUC_PREREQ(10,0)
+# pragma GCC diagnostic ignored "-Wanalyzer-use-after-free"
+#endif
+ if (*MYDBM_DPTR (key) != '$') {
+#pragma GCC diagnostic pop
+ datum content;
+
+ content = MYDBM_FETCH (dbf, key);
+
+ if (!MYDBM_DPTR (content))
+ fatal (0,
+ _( "NULL content for key: %s"),
+ MYDBM_DPTR (key));
+
+ /* ignore overflow entries */
+#pragma GCC diagnostic push
+#if GNUC_PREREQ(10,0)
+# pragma GCC diagnostic ignored "-Wanalyzer-use-after-free"
+#endif
+ if (*MYDBM_DPTR (content) != '\t') {
+#pragma GCC diagnostic pop
+ struct mandata *entry;
+
+ entry = split_content (dbf,
+ MYDBM_DPTR (content));
+
+ /* Accept if the entry is an ultimate manual
+ page and the section matches the one we're
+ currently dealing with */
+ if (entry->id == ULT_MAN &&
+ strcmp (entry->sec, section) == 0) {
+ if (message) {
+ printf (_("\nUpdating cat files for section %s of man hierarchy %s\n"),
+ section, manpath);
+ message = false;
+ }
+
+ arg_size += add_arg (cmd, key) + 1;
+
+ debug ("arg space free: %zu bytes\n",
+ ARG_MAX - arg_size);
+
+ /* Check to see if we have enough room
+ to add another max sized filename
+ and that we haven't run out of array
+ space too */
+ if (arg_size >= ARG_MAX - NAME_MAX ||
+ pipecmd_get_nargs (cmd) ==
+ MAX_ARGS) {
+ catman (cmd);
+
+ cmd = pipecmd_dup (basecmd);
+ arg_size = initial_bit;
+ }
+ }
+
+ free_mandata_struct (entry);
+ }
+
+ /* we don't need the content ever again */
+ assert (MYDBM_DPTR (content)); /* just to be sure */
+ MYDBM_FREE_DPTR (content);
+ }
+
+ nextkey = MYDBM_NEXTKEY (dbf, key);
+ MYDBM_FREE_DPTR (key);
+ key = nextkey;
+ }
+
+ if (pipecmd_get_nargs (cmd) > first_arg)
+ catman (cmd);
+ else
+ pipecmd_free (cmd);
+
+ pipecmd_free (basecmd);
+
+ return 0;
+}
+
+static bool check_access (const char *directory)
+{
+ if (!CAN_ACCESS (directory, W_OK)) {
+ error (0, errno, _("cannot write within %s"), directory);
+ return true;
+ }
+
+ return false;
+}
+
+int main (int argc, char *argv[])
+{
+ char *sys_manp;
+ char *mp;
+ const char **sp;
+
+ set_program_name (argv[0]);
+
+ init_debug ();
+ pipeline_install_post_fork (post_fork);
+
+ init_locale ();
+ locale = setlocale (LC_MESSAGES, NULL);
+ if (locale)
+ locale = xstrdup (locale);
+ else
+ locale = xstrdup ("C");
+
+ if (argp_parse (&argp, argc, argv, 0, 0, 0))
+ exit (FAIL);
+
+ for (sp = sections; sp && *sp; sp++)
+ debug ("sections: %s\n", *sp);
+
+ /* Deal with the MANPATH */
+
+ /* This is required for get_catpath(), regardless */
+ sys_manp = get_manpath (NULL);
+
+ /* pick up the system manpath or use the supplied one */
+ if (!manp) {
+ manp = get_mandb_manpath ();
+ if (!manp)
+ manp = sys_manp;
+ }
+
+ /* get the manpath as a list of pointers */
+ manpathlist = create_pathlist (manp);
+
+ GL_LIST_FOREACH (manpathlist, mp) {
+ char *catpath, *database;
+ MYDBM_FILE dbf;
+ size_t len;
+
+ catpath = get_catpath (mp, SYSTEM_CAT | USER_CAT);
+
+ if (catpath) {
+ if (is_directory (catpath) != 1) {
+ free (catpath);
+ continue;
+ }
+ database = mkdbname (catpath);
+ } else {
+ if (is_directory (mp) != 1)
+ continue;
+ database = mkdbname (mp);
+ catpath = xstrdup (mp);
+ }
+ dbf = MYDBM_NEW (database);
+ if (!MYDBM_RDOPEN (dbf) || dbver_rd (dbf)) {
+ error (0, errno, _("cannot read database %s"),
+ database);
+ goto next;
+ }
+ dbf_close_post_fork = dbf;
+
+ len = strlen (catpath);
+
+ for (sp = sections; sp && *sp; sp++) {
+ *(catpath + len) = '\0';
+ catpath = appendstr (catpath, "/cat", *sp, (void *) 0);
+ if (is_directory (catpath) != 1)
+ continue;
+ if (check_access (catpath))
+ continue;
+ if (parse_for_sec (dbf, mp, *sp)) {
+ error (0, 0, _("unable to update %s"), mp);
+ break;
+ }
+ }
+
+next:
+ dbf_close_post_fork = NULL;
+ MYDBM_FREE (dbf);
+ free (database);
+ free (catpath);
+ }
+
+ free_pathlist (manpathlist);
+ free (locale);
+ exit (OK);
+}
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