/* Reading/parsing the initialization file. Copyright (C) 2005 Free Software Foundation, Inc. This file is part of GNU Wget. GNU Wget 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. GNU Wget 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 Wget; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. In addition, as a special exception, the Free Software Foundation gives permission to link the code of its release of Wget with the OpenSSL project's "OpenSSL" library (or with modified versions of it that use the same license as the "OpenSSL" library), and distribute the linked executables. You must obey the GNU General Public License in all respects for all of the code used other than "OpenSSL". If you modify this file, you may extend this exception to your version of the file, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version. */ #include #include #include #include #ifdef HAVE_UNISTD_H # include #endif #ifdef HAVE_STRING_H # include #else # include #endif #include #ifdef HAVE_PWD_H # include #endif #include #include "wget.h" #include "utils.h" #include "init.h" #include "host.h" #include "netrc.h" #include "progress.h" #include "recur.h" /* for INFINITE_RECURSION */ #include "convert.h" /* for convert_cleanup */ #include "res.h" /* for res_cleanup */ #ifndef errno extern int errno; #endif /* We want tilde expansion enabled only when reading `.wgetrc' lines; otherwise, it will be performed by the shell. This variable will be set by the wgetrc-reading function. */ static int enable_tilde_expansion; #define CMD_DECLARE(func) static int func \ PARAMS ((const char *, const char *, void *)) CMD_DECLARE (cmd_boolean); CMD_DECLARE (cmd_bytes); CMD_DECLARE (cmd_bytes_large); #ifdef HAVE_SSL CMD_DECLARE (cmd_cert_type); #endif CMD_DECLARE (cmd_directory_vector); CMD_DECLARE (cmd_lockable_boolean); CMD_DECLARE (cmd_number); CMD_DECLARE (cmd_number_inf); CMD_DECLARE (cmd_string); CMD_DECLARE (cmd_file); CMD_DECLARE (cmd_directory); CMD_DECLARE (cmd_time); CMD_DECLARE (cmd_vector); CMD_DECLARE (cmd_spec_dirstruct); CMD_DECLARE (cmd_spec_header); CMD_DECLARE (cmd_spec_htmlify); CMD_DECLARE (cmd_spec_mirror); CMD_DECLARE (cmd_spec_prefer_family); CMD_DECLARE (cmd_spec_progress); CMD_DECLARE (cmd_spec_recursive); CMD_DECLARE (cmd_spec_restrict_file_names); #ifdef HAVE_SSL CMD_DECLARE (cmd_spec_secure_protocol); #endif CMD_DECLARE (cmd_spec_timeout); CMD_DECLARE (cmd_spec_useragent); /* List of recognized commands, each consisting of name, place and function. When adding a new command, simply add it to the list, but be sure to keep the list sorted alphabetically, as command_by_name depends on it. Also, be sure to add any entries that allocate memory (e.g. cmd_string and cmd_vector) to the cleanup() function below. */ static struct { const char *name; void *place; int (*action) PARAMS ((const char *, const char *, void *)); } commands[] = { { "accept", &opt.accepts, cmd_vector }, { "addhostdir", &opt.add_hostdir, cmd_boolean }, { "alwaysrest", &opt.always_rest, cmd_boolean }, /* deprecated */ { "background", &opt.background, cmd_boolean }, { "backupconverted", &opt.backup_converted, cmd_boolean }, { "backups", &opt.backups, cmd_number }, { "base", &opt.base_href, cmd_string }, { "bindaddress", &opt.bind_address, cmd_string }, #ifdef HAVE_SSL { "cacertificate", &opt.ca_cert, cmd_file }, #endif { "cache", &opt.allow_cache, cmd_boolean }, #ifdef HAVE_SSL { "cadirectory", &opt.ca_directory, cmd_directory }, { "certificate", &opt.cert_file, cmd_file }, { "certificatetype", &opt.cert_type, cmd_cert_type }, { "checkcertificate", &opt.check_cert, cmd_boolean }, #endif { "connecttimeout", &opt.connect_timeout, cmd_time }, { "continue", &opt.always_rest, cmd_boolean }, { "convertlinks", &opt.convert_links, cmd_boolean }, { "cookies", &opt.cookies, cmd_boolean }, { "cutdirs", &opt.cut_dirs, cmd_number }, #ifdef ENABLE_DEBUG { "debug", &opt.debug, cmd_boolean }, #endif { "deleteafter", &opt.delete_after, cmd_boolean }, { "dirprefix", &opt.dir_prefix, cmd_directory }, { "dirstruct", NULL, cmd_spec_dirstruct }, { "dnscache", &opt.dns_cache, cmd_boolean }, { "dnstimeout", &opt.dns_timeout, cmd_time }, { "domains", &opt.domains, cmd_vector }, { "dotbytes", &opt.dot_bytes, cmd_bytes }, { "dotsinline", &opt.dots_in_line, cmd_number }, { "dotspacing", &opt.dot_spacing, cmd_number }, { "dotstyle", &opt.dot_style, cmd_string }, #ifdef HAVE_SSL { "egdfile", &opt.egd_file, cmd_file }, #endif { "excludedirectories", &opt.excludes, cmd_directory_vector }, { "excludedomains", &opt.exclude_domains, cmd_vector }, { "followftp", &opt.follow_ftp, cmd_boolean }, { "followtags", &opt.follow_tags, cmd_vector }, { "forcehtml", &opt.force_html, cmd_boolean }, { "ftppasswd", &opt.ftp_passwd, cmd_string }, /* deprecated */ { "ftppassword", &opt.ftp_passwd, cmd_string }, { "ftpproxy", &opt.ftp_proxy, cmd_string }, { "ftpuser", &opt.ftp_user, cmd_string }, { "glob", &opt.ftp_glob, cmd_boolean }, { "header", NULL, cmd_spec_header }, { "htmlextension", &opt.html_extension, cmd_boolean }, { "htmlify", NULL, cmd_spec_htmlify }, { "httpkeepalive", &opt.http_keep_alive, cmd_boolean }, { "httppasswd", &opt.http_passwd, cmd_string }, /* deprecated */ { "httppassword", &opt.http_passwd, cmd_string }, { "httpproxy", &opt.http_proxy, cmd_string }, { "httpsproxy", &opt.https_proxy, cmd_string }, { "httpuser", &opt.http_user, cmd_string }, { "ignorelength", &opt.ignore_length, cmd_boolean }, { "ignoretags", &opt.ignore_tags, cmd_vector }, { "includedirectories", &opt.includes, cmd_directory_vector }, #ifdef ENABLE_IPV6 { "inet4only", &opt.ipv4_only, cmd_boolean }, { "inet6only", &opt.ipv6_only, cmd_boolean }, #endif { "input", &opt.input_filename, cmd_file }, { "keepsessioncookies", &opt.keep_session_cookies, cmd_boolean }, { "killlonger", &opt.kill_longer, cmd_boolean }, { "limitrate", &opt.limit_rate, cmd_bytes }, { "loadcookies", &opt.cookies_input, cmd_file }, { "logfile", &opt.lfilename, cmd_file }, { "login", &opt.ftp_user, cmd_string },/* deprecated*/ { "mirror", NULL, cmd_spec_mirror }, { "netrc", &opt.netrc, cmd_boolean }, { "noclobber", &opt.noclobber, cmd_boolean }, { "noparent", &opt.no_parent, cmd_boolean }, { "noproxy", &opt.no_proxy, cmd_vector }, { "numtries", &opt.ntry, cmd_number_inf },/* deprecated*/ { "outputdocument", &opt.output_document, cmd_file }, { "pagerequisites", &opt.page_requisites, cmd_boolean }, { "passiveftp", &opt.ftp_pasv, cmd_lockable_boolean }, { "passwd", &opt.ftp_passwd, cmd_string },/* deprecated*/ { "password", &opt.passwd, cmd_string }, { "postdata", &opt.post_data, cmd_string }, { "postfile", &opt.post_file_name, cmd_file }, { "preferfamily", NULL, cmd_spec_prefer_family }, { "preservepermissions", &opt.preserve_perm, cmd_boolean }, #ifdef HAVE_SSL { "privatekey", &opt.private_key, cmd_file }, { "privatekeytype", &opt.private_key_type, cmd_cert_type }, #endif { "progress", &opt.progress_type, cmd_spec_progress }, { "protocoldirectories", &opt.protocol_directories, cmd_boolean }, { "proxypasswd", &opt.proxy_passwd, cmd_string }, /* deprecated */ { "proxypassword", &opt.proxy_passwd, cmd_string }, { "proxyuser", &opt.proxy_user, cmd_string }, { "quiet", &opt.quiet, cmd_boolean }, { "quota", &opt.quota, cmd_bytes_large }, #ifdef HAVE_SSL { "randomfile", &opt.random_file, cmd_file }, #endif { "randomwait", &opt.random_wait, cmd_boolean }, { "readtimeout", &opt.read_timeout, cmd_time }, { "reclevel", &opt.reclevel, cmd_number_inf }, { "recursive", NULL, cmd_spec_recursive }, { "referer", &opt.referer, cmd_string }, { "reject", &opt.rejects, cmd_vector }, { "relativeonly", &opt.relative_only, cmd_boolean }, { "removelisting", &opt.remove_listing, cmd_boolean }, { "restrictfilenames", NULL, cmd_spec_restrict_file_names }, { "retrsymlinks", &opt.retr_symlinks, cmd_boolean }, { "retryconnrefused", &opt.retry_connrefused, cmd_boolean }, { "robots", &opt.use_robots, cmd_boolean }, { "savecookies", &opt.cookies_output, cmd_file }, { "saveheaders", &opt.save_headers, cmd_boolean }, #ifdef HAVE_SSL { "secureprotocol", &opt.secure_protocol, cmd_spec_secure_protocol }, #endif { "serverresponse", &opt.server_response, cmd_boolean }, { "spanhosts", &opt.spanhost, cmd_boolean }, { "spider", &opt.spider, cmd_boolean }, { "strictcomments", &opt.strict_comments, cmd_boolean }, { "timeout", NULL, cmd_spec_timeout }, { "timestamping", &opt.timestamping, cmd_boolean }, { "tries", &opt.ntry, cmd_number_inf }, { "useproxy", &opt.use_proxy, cmd_boolean }, { "user", &opt.user, cmd_string }, { "useragent", NULL, cmd_spec_useragent }, { "verbose", &opt.verbose, cmd_boolean }, { "wait", &opt.wait, cmd_time }, { "waitretry", &opt.waitretry, cmd_time } }; /* Look up CMDNAME in the commands[] and return its position in the array. If CMDNAME is not found, return -1. */ static int command_by_name (const char *cmdname) { /* Use binary search for speed. Wget has ~100 commands, which guarantees a worst case performance of 7 string comparisons. */ int lo = 0, hi = countof (commands) - 1; while (lo <= hi) { int mid = (lo + hi) >> 1; int cmp = strcasecmp (cmdname, commands[mid].name); if (cmp < 0) hi = mid - 1; else if (cmp > 0) lo = mid + 1; else return mid; } return -1; } /* Reset the variables to default values. */ static void defaults (void) { char *tmp; /* Most of the default values are 0. Just reset everything, and fill in the non-zero values. Note that initializing pointers to NULL this way is technically illegal, but porting Wget to a machine where NULL is not all-zero bit pattern will be the least of the implementors' worries. */ xzero (opt); opt.cookies = 1; opt.verbose = -1; opt.ntry = 20; opt.reclevel = 5; opt.add_hostdir = 1; opt.netrc = 1; opt.ftp_glob = 1; opt.htmlify = 1; opt.http_keep_alive = 1; opt.use_proxy = 1; tmp = getenv ("no_proxy"); if (tmp) opt.no_proxy = sepstring (tmp); opt.allow_cache = 1; opt.read_timeout = 900; opt.use_robots = 1; opt.remove_listing = 1; opt.dot_bytes = 1024; opt.dot_spacing = 10; opt.dots_in_line = 50; opt.dns_cache = 1; opt.ftp_pasv = 1; #ifdef HAVE_SSL opt.check_cert = 1; #endif /* The default for file name restriction defaults to the OS type. */ #if !defined(WINDOWS) && !defined(__CYGWIN__) opt.restrict_files_os = restrict_unix; #else opt.restrict_files_os = restrict_windows; #endif opt.restrict_files_ctrl = 1; } /* Return the user's home directory (strdup-ed), or NULL if none is found. */ char * home_dir (void) { char *home = getenv ("HOME"); if (!home) { #ifndef WINDOWS /* If HOME is not defined, try getting it from the password file. */ struct passwd *pwd = getpwuid (getuid ()); if (!pwd || !pwd->pw_dir) return NULL; home = pwd->pw_dir; #else /* WINDOWS */ /* Under Windows, if $HOME isn't defined, use the directory where `wget.exe' resides. */ home = ws_mypath (); #endif /* WINDOWS */ } return home ? xstrdup (home) : NULL; } /* Return the path to the user's .wgetrc. This is either the value of `WGETRC' environment variable, or `$HOME/.wgetrc'. If the `WGETRC' variable exists but the file does not exist, the function will exit(). */ static char * wgetrc_file_name (void) { char *env, *home; char *file = NULL; /* Try the environment. */ env = getenv ("WGETRC"); if (env && *env) { if (!file_exists_p (env)) { fprintf (stderr, _("%s: WGETRC points to %s, which doesn't exist.\n"), exec_name, env); exit (1); } return xstrdup (env); } /* If that failed, try $HOME/.wgetrc. */ home = home_dir (); if (home) file = aprintf ("%s/.wgetrc", home); xfree_null (home); #ifdef WINDOWS /* Under Windows, if we still haven't found .wgetrc, look for the file `wget.ini' in the directory where `wget.exe' resides; we do this for backward compatibility with previous versions of Wget. SYSTEM_WGETRC should not be defined under WINDOWS. */ if (!file || !file_exists_p (file)) { xfree_null (file); file = NULL; home = ws_mypath (); if (home) file = aprintf ("%s/wget.ini", home); } #endif /* WINDOWS */ if (!file) return NULL; if (!file_exists_p (file)) { xfree (file); return NULL; } return file; } /* Return values of parse_line. */ enum parse_line { line_ok, line_empty, line_syntax_error, line_unknown_command }; static enum parse_line parse_line PARAMS ((const char *, char **, char **, int *)); static int setval_internal PARAMS ((int, const char *, const char *)); /* Initialize variables from a wgetrc file. Returns zero (failure) if there were errors in the file. */ static int run_wgetrc (const char *file) { FILE *fp; char *line; int ln; int errcnt = 0; fp = fopen (file, "rb"); if (!fp) { fprintf (stderr, _("%s: Cannot read %s (%s).\n"), exec_name, file, strerror (errno)); return 1; /* not a fatal error */ } enable_tilde_expansion = 1; ln = 1; while ((line = read_whole_line (fp)) != NULL) { char *com = NULL, *val = NULL; int comind; /* Parse the line. */ switch (parse_line (line, &com, &val, &comind)) { case line_ok: /* If everything is OK, set the value. */ if (!setval_internal (comind, com, val)) { fprintf (stderr, _("%s: Error in %s at line %d.\n"), exec_name, file, ln); ++errcnt; } break; case line_syntax_error: fprintf (stderr, _("%s: Syntax error in %s at line %d.\n"), exec_name, file, ln); ++errcnt; break; case line_unknown_command: fprintf (stderr, _("%s: Unknown command `%s' in %s at line %d.\n"), exec_name, com, file, ln); ++errcnt; break; case line_empty: break; default: abort (); } xfree_null (com); xfree_null (val); xfree (line); ++ln; } enable_tilde_expansion = 0; fclose (fp); return errcnt == 0; } /* Initialize the defaults and run the system wgetrc and user's own wgetrc. */ void initialize (void) { char *file; int ok = 1; /* Load the hard-coded defaults. */ defaults (); /* If SYSTEM_WGETRC is defined, use it. */ #ifdef SYSTEM_WGETRC if (file_exists_p (SYSTEM_WGETRC)) ok &= run_wgetrc (SYSTEM_WGETRC); #endif /* Override it with your own, if one exists. */ file = wgetrc_file_name (); if (!file) return; /* #### We should canonicalize `file' and SYSTEM_WGETRC with something like realpath() before comparing them with `strcmp' */ #ifdef SYSTEM_WGETRC if (!strcmp (file, SYSTEM_WGETRC)) { fprintf (stderr, _("\ %s: Warning: Both system and user wgetrc point to `%s'.\n"), exec_name, file); } else #endif ok &= run_wgetrc (file); /* If there were errors processing either `.wgetrc', abort. */ if (!ok) exit (2); xfree (file); return; } /* Remove dashes and underscores from S, modifying S in the process. */ static void dehyphen (char *s) { char *t = s; /* t - tortoise */ char *h = s; /* h - hare */ while (*h) if (*h == '_' || *h == '-') ++h; else *t++ = *h++; *t = '\0'; } /* Parse the line pointed by line, with the syntax: * command * = * value * Uses malloc to allocate space for command and value. If the line is invalid, data is freed and 0 is returned. Returns one of line_ok, line_empty, line_syntax_error, or line_unknown_command. In case of line_ok, *COM and *VAL point to freshly allocated strings, and *COMIND points to com's index. In case of error or empty line, their values are unmodified. */ static enum parse_line parse_line (const char *line, char **com, char **val, int *comind) { const char *p; const char *end = line + strlen (line); const char *cmdstart, *cmdend; const char *valstart, *valend; char *cmdcopy; int ind; /* Skip leading and trailing whitespace. */ while (*line && ISSPACE (*line)) ++line; while (end > line && ISSPACE (end[-1])) --end; /* Skip empty lines and comments. */ if (!*line || *line == '#') return line_empty; p = line; cmdstart = p; while (p < end && (ISALPHA (*p) || *p == '_' || *p == '-')) ++p; cmdend = p; /* Skip '=', as well as any space before or after it. */ while (p < end && ISSPACE (*p)) ++p; if (p == end || *p != '=') return line_syntax_error; ++p; while (p < end && ISSPACE (*p)) ++p; valstart = p; valend = end; /* The syntax is valid (even though the command might not be). Fill in the command name and value. */ *com = strdupdelim (cmdstart, cmdend); *val = strdupdelim (valstart, valend); /* The line now known to be syntactically correct. Check whether the command is valid. */ BOUNDED_TO_ALLOCA (cmdstart, cmdend, cmdcopy); dehyphen (cmdcopy); ind = command_by_name (cmdcopy); if (ind == -1) return line_unknown_command; /* Report success to the caller. */ *comind = ind; return line_ok; } /* Run commands[comind].action. */ static int setval_internal (int comind, const char *com, const char *val) { assert (0 <= comind && comind < countof (commands)); DEBUGP (("Setting %s (%s) to %s\n", com, commands[comind].name, val)); return ((*commands[comind].action) (com, val, commands[comind].place)); } /* Run command COM with value VAL. If running the command produces an error, report the error and exit. This is intended to be called from main() to modify Wget's behavior through command-line switches. Since COM is hard-coded in main(), it is not canonicalized, and this aborts when COM is not found. If COMIND's are exported to init.h, this function will be changed to accept COMIND directly. */ void setoptval (const char *com, const char *val, const char *optname) { /* Prepend "--" to OPTNAME. */ char *dd_optname = (char *) alloca (2 + strlen (optname) + 1); dd_optname[0] = '-'; dd_optname[1] = '-'; strcpy (dd_optname + 2, optname); assert (val != NULL); if (!setval_internal (command_by_name (com), dd_optname, val)) exit (2); } /* Parse OPT into command and value and run it. For example, run_command("foo=bar") is equivalent to setoptval("foo", "bar"). This is used by the `--execute' flag in main.c. */ void run_command (const char *opt) { char *com, *val; int comind; switch (parse_line (opt, &com, &val, &comind)) { case line_ok: if (!setval_internal (comind, com, val)) exit (2); xfree (com); xfree (val); break; default: fprintf (stderr, _("%s: Invalid --execute command `%s'\n"), exec_name, opt); exit (2); } } /* Generic helper functions, for use with `commands'. */ /* Forward declarations: */ struct decode_item { const char *name; int code; }; static int decode_string PARAMS ((const char *, const struct decode_item *, int, int *)); static int simple_atoi PARAMS ((const char *, const char *, int *)); static int simple_atof PARAMS ((const char *, const char *, double *)); #define CMP1(p, c0) (TOLOWER((p)[0]) == (c0) && (p)[1] == '\0') #define CMP2(p, c0, c1) (TOLOWER((p)[0]) == (c0) \ && TOLOWER((p)[1]) == (c1) \ && (p)[2] == '\0') #define CMP3(p, c0, c1, c2) (TOLOWER((p)[0]) == (c0) \ && TOLOWER((p)[1]) == (c1) \ && TOLOWER((p)[2]) == (c2) \ && (p)[3] == '\0') /* Store the boolean value from VAL to PLACE. COM is ignored, except for error messages. */ static int cmd_boolean (const char *com, const char *val, void *place) { int bool_value; if (CMP2 (val, 'o', 'n') || CMP3 (val, 'y', 'e', 's') || CMP1 (val, '1')) /* "on", "yes" and "1" mean true. */ bool_value = 1; else if (CMP3 (val, 'o', 'f', 'f') || CMP2 (val, 'n', 'o') || CMP1 (val, '0')) /* "off", "no" and "0" mean false. */ bool_value = 0; else { fprintf (stderr, _("%s: %s: Invalid boolean `%s', use `on' or `off'.\n"), exec_name, com, val); return 0; } *(int *)place = bool_value; return 1; } /* Store the lockable_boolean {2, 1, 0, -1} value from VAL to PLACE. COM is ignored, except for error messages. Values 2 and -1 indicate that once defined, the value may not be changed by successive wgetrc files or command-line arguments. Values: 2 - Enable a particular option for good ("always") 1 - Enable an option ("on") 0 - Disable an option ("off") -1 - Disable an option for good ("never") */ static int cmd_lockable_boolean (const char *com, const char *val, void *place) { int lockable_boolean_value; int oldval = *(int *)place; /* * If a config file said "always" or "never", don't allow command line * arguments to override the config file. */ if (oldval == -1 || oldval == 2) return 1; if (0 == strcasecmp (val, "always") || CMP1 (val, '2')) lockable_boolean_value = 2; else if (CMP2 (val, 'o', 'n') || CMP3 (val, 'y', 'e', 's') || CMP1 (val, '1')) lockable_boolean_value = 1; else if (CMP3 (val, 'o', 'f', 'f') || CMP2 (val, 'n', 'o') || CMP1 (val, '0')) lockable_boolean_value = 0; else if (0 == strcasecmp (val, "never") || CMP2 (val, '-', '1')) lockable_boolean_value = -1; else { fprintf (stderr, _("%s: %s: Invalid boolean `%s', use always, on, off, or never.\n"), exec_name, com, val); return 0; } *(int *)place = lockable_boolean_value; return 1; } /* Set the non-negative integer value from VAL to PLACE. With incorrect specification, the number remains unchanged. */ static int cmd_number (const char *com, const char *val, void *place) { if (!simple_atoi (val, val + strlen (val), place) || *(int *) place < 0) { fprintf (stderr, _("%s: %s: Invalid number `%s'.\n"), exec_name, com, val); return 0; } return 1; } /* Similar to cmd_number(), only accepts `inf' as a synonym for 0. */ static int cmd_number_inf (const char *com, const char *val, void *place) { if (!strcasecmp (val, "inf")) { *(int *)place = 0; return 1; } return cmd_number (com, val, place); } /* Copy (strdup) the string at COM to a new location and place a pointer to *PLACE. */ static int cmd_string (const char *com, const char *val, void *place) { char **pstring = (char **)place; xfree_null (*pstring); *pstring = xstrdup (val); return 1; } #ifndef WINDOWS # define ISSEP(c) ((c) == '/') #else # define ISSEP(c) ((c) == '/' || (c) == '\\') #endif /* Like the above, but handles tilde-expansion when reading a user's `.wgetrc'. In that case, and if VAL begins with `~', the tilde gets expanded to the user's home directory. */ static int cmd_file (const char *com, const char *val, void *place) { char **pstring = (char **)place; xfree_null (*pstring); /* #### If VAL is empty, perhaps should set *PLACE to NULL. */ if (!enable_tilde_expansion || !(*val == '~' && ISSEP (val[1]))) { noexpand: *pstring = xstrdup (val); } else { int homelen; char *home = home_dir (); if (!home) goto noexpand; homelen = strlen (home); while (homelen && ISSEP (home[homelen - 1])) home[--homelen] = '\0'; /* Skip the leading "~/". */ for (++val; ISSEP (*val); val++) ; *pstring = concat_strings (home, "/", val, (char *) 0); } #ifdef WINDOWS /* Convert "\" to "/". */ { char *s; for (s = *pstring; *s; s++) if (*s == '\\') *s = '/'; } #endif return 1; } /* Like cmd_file, but strips trailing '/' characters. */ static int cmd_directory (const char *com, const char *val, void *place) { char *s, *t; /* Call cmd_file() for tilde expansion and separator canonicalization (backslash -> slash under Windows). These things should perhaps be in a separate function. */ if (!cmd_file (com, val, place)) return 0; s = *(char **)place; t = s + strlen (s); while (t > s && *--t == '/') *t = '\0'; return 1; } /* Split VAL by space to a vector of values, and append those values to vector pointed to by the PLACE argument. If VAL is empty, the PLACE vector is cleared instead. */ static int cmd_vector (const char *com, const char *val, void *place) { char ***pvec = (char ***)place; if (*val) *pvec = merge_vecs (*pvec, sepstring (val)); else { free_vec (*pvec); *pvec = NULL; } return 1; } static int cmd_directory_vector (const char *com, const char *val, void *place) { char ***pvec = (char ***)place; if (*val) { /* Strip the trailing slashes from directories. */ char **t, **seps; seps = sepstring (val); for (t = seps; t && *t; t++) { int len = strlen (*t); /* Skip degenerate case of root directory. */ if (len > 1) { if ((*t)[len - 1] == '/') (*t)[len - 1] = '\0'; } } *pvec = merge_vecs (*pvec, seps); } else { free_vec (*pvec); *pvec = NULL; } return 1; } /* Engine for cmd_bytes and cmd_bytes_large: converts a string such as "100k" or "2.5G" to a floating point number. */ static int parse_bytes_helper (const char *val, double *result) { double number, mult; const char *end = val + strlen (val); /* Check for "inf". */ if (0 == strcmp (val, "inf")) { *result = 0; return 1; } /* Strip trailing whitespace. */ while (val < end && ISSPACE (end[-1])) --end; if (val == end) return 0; switch (TOLOWER (end[-1])) { case 'k': --end, mult = 1024.0; break; case 'm': --end, mult = 1048576.0; break; case 'g': --end, mult = 1073741824.0; break; case 't': --end, mult = 1099511627776.0; break; default: /* Not a recognized suffix: assume it's a digit. (If not, simple_atof will raise an error.) */ mult = 1; } /* Skip leading and trailing whitespace. */ while (val < end && ISSPACE (*val)) ++val; while (val < end && ISSPACE (end[-1])) --end; if (val == end) return 0; if (!simple_atof (val, end, &number) || number < 0) return 0; *result = number * mult; return 1; } /* Parse VAL as a number and set its value to PLACE (which should point to a wgint). By default, the value is assumed to be in bytes. If "K", "M", or "G" are appended, the value is multiplied with 1<<10, 1<<20, or 1<<30, respectively. Floating point values are allowed and are cast to integer before use. The idea is to be able to use things like 1.5k instead of "1536". The string "inf" is returned as 0. In case of error, 0 is returned and memory pointed to by PLACE remains unmodified. */ static int cmd_bytes (const char *com, const char *val, void *place) { double byte_value; if (!parse_bytes_helper (val, &byte_value)) { fprintf (stderr, _("%s: %s: Invalid byte value `%s'\n"), exec_name, com, val); return 0; } *(wgint *)place = (wgint)byte_value; return 1; } /* Like cmd_bytes, but PLACE is interpreted as a pointer to LARGE_INT. It works by converting the string to double, therefore working with values up to 2^53-1 without loss of precision. This value (8192 TB) is large enough to serve for a while. */ static int cmd_bytes_large (const char *com, const char *val, void *place) { double byte_value; if (!parse_bytes_helper (val, &byte_value)) { fprintf (stderr, _("%s: %s: Invalid byte value `%s'\n"), exec_name, com, val); return 0; } *(LARGE_INT *)place = (LARGE_INT)byte_value; return 1; } /* Store the value of VAL to *OUT. The value is a time period, by default expressed in seconds, but also accepting suffixes "m", "h", "d", and "w" for minutes, hours, days, and weeks respectively. */ static int cmd_time (const char *com, const char *val, void *place) { double number, mult; const char *end = val + strlen (val); /* Strip trailing whitespace. */ while (val < end && ISSPACE (end[-1])) --end; if (val == end) { err: fprintf (stderr, _("%s: %s: Invalid time period `%s'\n"), exec_name, com, val); return 0; } switch (TOLOWER (end[-1])) { case 's': --end, mult = 1; /* seconds */ break; case 'm': --end, mult = 60; /* minutes */ break; case 'h': --end, mult = 3600; /* hours */ break; case 'd': --end, mult = 86400.0; /* days */ break; case 'w': --end, mult = 604800.0; /* weeks */ break; default: /* Not a recognized suffix: assume it belongs to the number. (If not, simple_atof will raise an error.) */ mult = 1; } /* Skip leading and trailing whitespace. */ while (val < end && ISSPACE (*val)) ++val; while (val < end && ISSPACE (end[-1])) --end; if (val == end) goto err; if (!simple_atof (val, end, &number)) goto err; *(double *)place = number * mult; return 1; } #ifdef HAVE_SSL static int cmd_cert_type (const char *com, const char *val, void *place) { static const struct decode_item choices[] = { { "pem", keyfile_pem }, { "der", keyfile_asn1 }, { "asn1", keyfile_asn1 }, }; int ok = decode_string (val, choices, countof (choices), place); if (!ok) fprintf (stderr, _("%s: %s: Invalid value `%s'.\n"), exec_name, com, val); return ok; } #endif /* Specialized helper functions, used by `commands' to handle some options specially. */ static int check_user_specified_header PARAMS ((const char *)); static int cmd_spec_dirstruct (const char *com, const char *val, void *place_ignored) { if (!cmd_boolean (com, val, &opt.dirstruct)) return 0; /* Since dirstruct behaviour is explicitly changed, no_dirstruct must be affected inversely. */ if (opt.dirstruct) opt.no_dirstruct = 0; else opt.no_dirstruct = 1; return 1; } static int cmd_spec_header (const char *com, const char *val, void *place_ignored) { /* Empty value means reset the list of headers. */ if (*val == '\0') { free_vec (opt.user_headers); opt.user_headers = NULL; return 1; } if (!check_user_specified_header (val)) { fprintf (stderr, _("%s: %s: Invalid header `%s'.\n"), exec_name, com, val); return 0; } opt.user_headers = vec_append (opt.user_headers, val); return 1; } static int cmd_spec_htmlify (const char *com, const char *val, void *place_ignored) { int flag = cmd_boolean (com, val, &opt.htmlify); if (flag && !opt.htmlify) opt.remove_listing = 0; return flag; } /* Set the "mirror" mode. It means: recursive download, timestamping, no limit on max. recursion depth, and don't remove listings. */ static int cmd_spec_mirror (const char *com, const char *val, void *place_ignored) { int mirror; if (!cmd_boolean (com, val, &mirror)) return 0; if (mirror) { opt.recursive = 1; if (!opt.no_dirstruct) opt.dirstruct = 1; opt.timestamping = 1; opt.reclevel = INFINITE_RECURSION; opt.remove_listing = 0; } return 1; } /* Validate --prefer-family and set the choice. Allowed values are "IPv4", "IPv6", and "none". */ static int cmd_spec_prefer_family (const char *com, const char *val, void *place_ignored) { static const struct decode_item choices[] = { { "IPv4", prefer_ipv4 }, { "IPv6", prefer_ipv6 }, { "none", prefer_none }, }; int ok = decode_string (val, choices, countof (choices), (int *) &opt.prefer_family); if (!ok) fprintf (stderr, _("%s: %s: Invalid value `%s'.\n"), exec_name, com, val); return ok; } /* Set progress.type to VAL, but verify that it's a valid progress implementation before that. */ static int cmd_spec_progress (const char *com, const char *val, void *place_ignored) { if (!valid_progress_implementation_p (val)) { fprintf (stderr, _("%s: %s: Invalid progress type `%s'.\n"), exec_name, com, val); return 0; } xfree_null (opt.progress_type); /* Don't call set_progress_implementation here. It will be called in main() when it becomes clear what the log output is. */ opt.progress_type = xstrdup (val); return 1; } /* Set opt.recursive to VAL as with cmd_boolean. If opt.recursive is set to true, also set opt.dirstruct to 1, unless opt.no_dirstruct is specified. */ static int cmd_spec_recursive (const char *com, const char *val, void *place_ignored) { if (!cmd_boolean (com, val, &opt.recursive)) return 0; else { if (opt.recursive && !opt.no_dirstruct) opt.dirstruct = 1; } return 1; } static int cmd_spec_restrict_file_names (const char *com, const char *val, void *place_ignored) { int restrict_os = opt.restrict_files_os; int restrict_ctrl = opt.restrict_files_ctrl; const char *end = strchr (val, ','); if (!end) end = val + strlen (val); #define VAL_IS(string_literal) BOUNDED_EQUAL (val, end, string_literal) if (VAL_IS ("unix")) restrict_os = restrict_unix; else if (VAL_IS ("windows")) restrict_os = restrict_windows; else if (VAL_IS ("nocontrol")) restrict_ctrl = 0; else { err: fprintf (stderr, _("%s: %s: Invalid restriction `%s', use `unix' or `windows'.\n"), exec_name, com, val); return 0; } #undef VAL_IS if (*end) { if (!strcmp (end + 1, "nocontrol")) restrict_ctrl = 0; else goto err; } opt.restrict_files_os = restrict_os; opt.restrict_files_ctrl = restrict_ctrl; return 1; } #ifdef HAVE_SSL static int cmd_spec_secure_protocol (const char *com, const char *val, void *place) { static const struct decode_item choices[] = { { "auto", secure_protocol_auto }, { "sslv2", secure_protocol_sslv2 }, { "sslv3", secure_protocol_sslv3 }, { "tlsv1", secure_protocol_tlsv1 }, }; int ok = decode_string (val, choices, countof (choices), place); if (!ok) fprintf (stderr, _("%s: %s: Invalid value `%s'.\n"), exec_name, com, val); return ok; } #endif /* Set all three timeout values. */ static int cmd_spec_timeout (const char *com, const char *val, void *place_ignored) { double value; if (!cmd_time (com, val, &value)) return 0; opt.read_timeout = value; opt.connect_timeout = value; opt.dns_timeout = value; return 1; } static int cmd_spec_useragent (const char *com, const char *val, void *place_ignored) { /* Disallow embedded newlines. */ if (strchr (val, '\n')) { fprintf (stderr, _("%s: %s: Invalid value `%s'.\n"), exec_name, com, val); return 0; } xfree_null (opt.useragent); opt.useragent = xstrdup (val); return 1; } /* Miscellaneous useful routines. */ /* A very simple atoi clone, more useful than atoi because it works on delimited strings, and has error reportage. Returns 1 on success, 0 on failure. If successful, stores result to *DEST. */ static int simple_atoi (const char *beg, const char *end, int *dest) { int result = 0; int negative = 0; const char *p = beg; while (p < end && ISSPACE (*p)) ++p; if (p < end && (*p == '-' || *p == '+')) { negative = (*p == '-'); ++p; } if (p == end) return 0; /* Read negative numbers in a separate loop because the most negative integer cannot be represented as a positive number. */ if (!negative) for (; p < end && ISDIGIT (*p); p++) { int next = (10 * result) + (*p - '0'); if (next < result) return 0; /* overflow */ result = next; } else for (; p < end && ISDIGIT (*p); p++) { int next = (10 * result) - (*p - '0'); if (next > result) return 0; /* underflow */ result = next; } if (p != end) return 0; *dest = result; return 1; } /* Trivial atof, with error reporting. Handles "[.]", doesn't handle exponential notation. Returns 1 on success, 0 on failure. In case of success, stores its result to *DEST. */ static int simple_atof (const char *beg, const char *end, double *dest) { double result = 0; int negative = 0; int seen_dot = 0; int seen_digit = 0; double divider = 1; const char *p = beg; while (p < end && ISSPACE (*p)) ++p; if (p < end && (*p == '-' || *p == '+')) { negative = (*p == '-'); ++p; } for (; p < end; p++) { char ch = *p; if (ISDIGIT (ch)) { if (!seen_dot) result = (10 * result) + (ch - '0'); else result += (ch - '0') / (divider *= 10); seen_digit = 1; } else if (ch == '.') { if (!seen_dot) seen_dot = 1; else return 0; } else return 0; } if (!seen_digit) return 0; if (negative) result = -result; *dest = result; return 1; } /* Verify that the user-specified header in S is valid. It must contain a colon preceded by non-white-space characters and must not contain newlines. */ static int check_user_specified_header (const char *s) { const char *p; for (p = s; *p && *p != ':' && !ISSPACE (*p); p++); /* The header MUST contain `:' preceded by at least one non-whitespace character. */ if (*p != ':' || p == s) return 0; /* The header MUST NOT contain newlines. */ if (strchr (s, '\n')) return 0; return 1; } /* Decode VAL into a number, according to ITEMS. */ static int decode_string (const char *val, const struct decode_item *items, int itemcount, int *place) { int i; for (i = 0; i < itemcount; i++) if (0 == strcasecmp (val, items[i].name)) { *place = items[i].code; return 1; } return 0; } void cleanup_html_url PARAMS ((void)); void http_cleanup PARAMS ((void)); /* Free the memory allocated by global variables. */ void cleanup (void) { /* Free external resources, close files, etc. */ { extern FILE *output_stream; if (output_stream) fclose (output_stream); /* No need to check for error because Wget flushes its output (and checks for errors) after any data arrives. */ } /* We're exiting anyway so there's no real need to call free() hundreds of times. Skipping the frees will make Wget exit faster. However, when detecting leaks, it's crucial to free() everything because then you can find the real leaks, i.e. the allocated memory which grows with the size of the program. */ #ifdef DEBUG_MALLOC convert_cleanup (); res_cleanup (); http_cleanup (); cleanup_html_url (); host_cleanup (); log_cleanup (); { extern acc_t *netrc_list; free_netrc (netrc_list); } xfree_null (opt.lfilename); xfree_null (opt.dir_prefix); xfree_null (opt.input_filename); xfree_null (opt.output_document); free_vec (opt.accepts); free_vec (opt.rejects); free_vec (opt.excludes); free_vec (opt.includes); free_vec (opt.domains); free_vec (opt.follow_tags); free_vec (opt.ignore_tags); xfree_null (opt.progress_type); xfree_null (opt.ftp_user); xfree_null (opt.ftp_passwd); xfree_null (opt.ftp_proxy); xfree_null (opt.https_proxy); xfree_null (opt.http_proxy); free_vec (opt.no_proxy); xfree_null (opt.useragent); xfree_null (opt.referer); xfree_null (opt.http_user); xfree_null (opt.http_passwd); free_vec (opt.user_headers); # ifdef HAVE_SSL xfree_null (opt.cert_file); xfree_null (opt.private_key); xfree_null (opt.ca_directory); xfree_null (opt.ca_cert); xfree_null (opt.random_file); xfree_null (opt.egd_file); # endif xfree_null (opt.bind_address); xfree_null (opt.cookies_input); xfree_null (opt.cookies_output); xfree_null (opt.user); xfree_null (opt.passwd); #endif /* DEBUG_MALLOC */ }