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Diffstat (limited to 'src/postalias/postalias.c')
| -rw-r--r-- | src/postalias/postalias.c | 924 |
1 files changed, 924 insertions, 0 deletions
diff --git a/src/postalias/postalias.c b/src/postalias/postalias.c new file mode 100644 index 0000000..d17e397 --- /dev/null +++ b/src/postalias/postalias.c @@ -0,0 +1,924 @@ +/*++ +/* NAME +/* postalias 1 +/* SUMMARY +/* Postfix alias database maintenance +/* SYNOPSIS +/* .fi +/* \fBpostalias\fR [\fB-Nfinoprsuvw\fR] [\fB-c \fIconfig_dir\fR] +/* [\fB-d \fIkey\fR] [\fB-q \fIkey\fR] +/* [\fIfile_type\fR:]\fIfile_name\fR ... +/* DESCRIPTION +/* The \fBpostalias\fR(1) command creates or queries one or more Postfix +/* alias databases, or updates an existing one. The input and output +/* file formats are expected to be compatible with Sendmail version 8, +/* and are expected to be suitable for use as NIS alias maps. +/* +/* If the result files do not exist they will be created with the +/* same group and other read permissions as their source file. +/* +/* While a database update is in progress, signal delivery is +/* postponed, and an exclusive, advisory, lock is placed on the +/* entire database, in order to avoid surprises in spectator +/* processes. +/* +/* The format of Postfix alias input files is described in +/* \fBaliases\fR(5). +/* +/* By default the lookup key is mapped to lowercase to make +/* the lookups case insensitive; as of Postfix 2.3 this case +/* folding happens only with tables whose lookup keys are +/* fixed-case strings such as btree:, dbm: or hash:. With +/* earlier versions, the lookup key is folded even with tables +/* where a lookup field can match both upper and lower case +/* text, such as regexp: and pcre:. This resulted in loss of +/* information with $\fInumber\fR substitutions. +/* +/* Options: +/* .IP "\fB-c \fIconfig_dir\fR" +/* Read the \fBmain.cf\fR configuration file in the named directory +/* instead of the default configuration directory. +/* .IP "\fB-d \fIkey\fR" +/* Search the specified maps for \fIkey\fR and remove one entry per map. +/* The exit status is zero when the requested information was found. +/* +/* If a key value of \fB-\fR is specified, the program reads key +/* values from the standard input stream. The exit status is zero +/* when at least one of the requested keys was found. +/* .IP \fB-f\fR +/* Do not fold the lookup key to lower case while creating or querying +/* a table. +/* +/* With Postfix version 2.3 and later, this option has no +/* effect for regular expression tables. There, case folding +/* is controlled by appending a flag to a pattern. +/* .IP \fB-i\fR +/* Incremental mode. Read entries from standard input and do not +/* truncate an existing database. By default, \fBpostalias\fR(1) creates +/* a new database from the entries in \fIfile_name\fR. +/* .IP \fB-N\fR +/* Include the terminating null character that terminates lookup keys +/* and values. By default, \fBpostalias\fR(1) does whatever +/* is the default for +/* the host operating system. +/* .IP \fB-n\fR +/* Don't include the terminating null character that terminates lookup +/* keys and values. By default, \fBpostalias\fR(1) does whatever +/* is the default for +/* the host operating system. +/* .IP \fB-o\fR +/* Do not release root privileges when processing a non-root +/* input file. By default, \fBpostalias\fR(1) drops root privileges +/* and runs as the source file owner instead. +/* .IP \fB-p\fR +/* Do not inherit the file access permissions from the input file +/* when creating a new file. Instead, create a new file with default +/* access permissions (mode 0644). +/* .IP "\fB-q \fIkey\fR" +/* Search the specified maps for \fIkey\fR and write the first value +/* found to the standard output stream. The exit status is zero +/* when the requested information was found. +/* +/* Note: this performs a single query with the key as specified, +/* and does not make iterative queries with substrings of the +/* key as described in the aliases(5) manual page. +/* +/* If a key value of \fB-\fR is specified, the program reads key +/* values from the standard input stream and writes one line of +/* \fIkey: value\fR output for each key that was found. The exit +/* status is zero when at least one of the requested keys was found. +/* .IP \fB-r\fR +/* When updating a table, do not complain about attempts to update +/* existing entries, and make those updates anyway. +/* .IP \fB-s\fR +/* Retrieve all database elements, and write one line of +/* \fIkey: value\fR output for each element. The elements are +/* printed in database order, which is not necessarily the same +/* as the original input order. +/* This feature is available in Postfix version 2.2 and later, +/* and is not available for all database types. +/* .IP \fB-u\fR +/* Disable UTF-8 support. UTF-8 support is enabled by default +/* when "smtputf8_enable = yes". It requires that keys and +/* values are valid UTF-8 strings. +/* .IP \fB-v\fR +/* Enable verbose logging for debugging purposes. Multiple \fB-v\fR +/* options make the software increasingly verbose. +/* .IP \fB-w\fR +/* When updating a table, do not complain about attempts to update +/* existing entries, and ignore those attempts. +/* .PP +/* Arguments: +/* .IP \fIfile_type\fR +/* The database type. To find out what types are supported, use +/* the "\fBpostconf -m\fR" command. +/* +/* The \fBpostalias\fR(1) command can query any supported file type, +/* but it can create only the following file types: +/* .RS +/* .IP \fBbtree\fR +/* The output is a btree file, named \fIfile_name\fB.db\fR. +/* This is available on systems with support for \fBdb\fR databases. +/* .IP \fBcdb\fR +/* The output is one file named \fIfile_name\fB.cdb\fR. +/* This is available on systems with support for \fBcdb\fR databases. +/* .IP \fBdbm\fR +/* The output consists of two files, named \fIfile_name\fB.pag\fR and +/* \fIfile_name\fB.dir\fR. +/* This is available on systems with support for \fBdbm\fR databases. +/* .IP \fBfail\fR +/* A table that reliably fails all requests. The lookup table +/* name is used for logging only. This table exists to simplify +/* Postfix error tests. +/* .IP \fBhash\fR +/* The output is a hashed file, named \fIfile_name\fB.db\fR. +/* This is available on systems with support for \fBdb\fR databases. +/* .IP \fBlmdb\fR +/* The output is a btree-based file, named \fIfile_name\fB.lmdb\fR. +/* \fBlmdb\fR supports concurrent writes and reads from different +/* processes, unlike other supported file-based tables. +/* This is available on systems with support for \fBlmdb\fR databases. +/* .IP \fBsdbm\fR +/* The output consists of two files, named \fIfile_name\fB.pag\fR and +/* \fIfile_name\fB.dir\fR. +/* This is available on systems with support for \fBsdbm\fR databases. +/* .PP +/* When no \fIfile_type\fR is specified, the software uses the database +/* type specified via the \fBdefault_database_type\fR configuration +/* parameter. +/* The default value for this parameter depends on the host environment. +/* .RE +/* .IP \fIfile_name\fR +/* The name of the alias database source file when creating a database. +/* DIAGNOSTICS +/* Problems are logged to the standard error stream and to +/* \fBsyslogd\fR(8) or \fBpostlogd\fR(8). No output means that +/* no problems were detected. Duplicate entries are skipped and are +/* flagged with a warning. +/* +/* \fBpostalias\fR(1) terminates with zero exit status in case of success +/* (including successful "\fBpostalias -q\fR" lookup) and terminates +/* with non-zero exit status in case of failure. +/* ENVIRONMENT +/* .ad +/* .fi +/* .IP \fBMAIL_CONFIG\fR +/* Directory with Postfix configuration files. +/* .IP \fBMAIL_VERBOSE\fR +/* Enable verbose logging for debugging purposes. +/* CONFIGURATION PARAMETERS +/* .ad +/* .fi +/* The following \fBmain.cf\fR parameters are especially relevant to +/* this program. +/* +/* The text below provides only a parameter summary. See +/* \fBpostconf\fR(5) for more details including examples. +/* .IP "\fBalias_database (see 'postconf -d' output)\fR" +/* The alias databases for \fBlocal\fR(8) delivery that are updated with +/* "\fBnewaliases\fR" or with "\fBsendmail -bi\fR". +/* .IP "\fBconfig_directory (see 'postconf -d' output)\fR" +/* The default location of the Postfix main.cf and master.cf +/* configuration files. +/* .IP "\fBberkeley_db_create_buffer_size (16777216)\fR" +/* The per-table I/O buffer size for programs that create Berkeley DB +/* hash or btree tables. +/* .IP "\fBberkeley_db_read_buffer_size (131072)\fR" +/* The per-table I/O buffer size for programs that read Berkeley DB +/* hash or btree tables. +/* .IP "\fBdefault_database_type (see 'postconf -d' output)\fR" +/* The default database type for use in \fBnewaliases\fR(1), \fBpostalias\fR(1) +/* and \fBpostmap\fR(1) commands. +/* .IP "\fBimport_environment (see 'postconf -d' output)\fR" +/* The list of environment variables that a privileged Postfix +/* process will import from a non-Postfix parent process, or name=value +/* environment overrides. +/* .IP "\fBsmtputf8_enable (yes)\fR" +/* Enable preliminary SMTPUTF8 support for the protocols described +/* in RFC 6531, RFC 6532, and RFC 6533. +/* .IP "\fBsyslog_facility (mail)\fR" +/* The syslog facility of Postfix logging. +/* .IP "\fBsyslog_name (see 'postconf -d' output)\fR" +/* A prefix that is prepended to the process name in syslog +/* records, so that, for example, "smtpd" becomes "prefix/smtpd". +/* .PP +/* Available in Postfix 2.11 and later: +/* .IP "\fBlmdb_map_size (16777216)\fR" +/* The initial OpenLDAP LMDB database size limit in bytes. +/* STANDARDS +/* RFC 822 (ARPA Internet Text Messages) +/* SEE ALSO +/* aliases(5), format of alias database input file. +/* local(8), Postfix local delivery agent. +/* postconf(1), supported database types +/* postconf(5), configuration parameters +/* postmap(1), create/update/query lookup tables +/* newaliases(1), Sendmail compatibility interface. +/* postlogd(8), Postfix logging +/* syslogd(8), system logging +/* README FILES +/* .ad +/* .fi +/* Use "\fBpostconf readme_directory\fR" or +/* "\fBpostconf html_directory\fR" to locate this information. +/* .na +/* .nf +/* DATABASE_README, Postfix lookup table overview +/* LICENSE +/* .ad +/* .fi +/* The Secure Mailer license must be distributed with this software. +/* AUTHOR(S) +/* Wietse Venema +/* IBM T.J. Watson Research +/* P.O. Box 704 +/* Yorktown Heights, NY 10598, USA +/* +/* Wietse Venema +/* Google, Inc. +/* 111 8th Avenue +/* New York, NY 10011, USA +/*--*/ + +/* System library. */ + +#include <sys_defs.h> +#include <sys/stat.h> +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> +#include <ctype.h> +#include <string.h> + +/* Utility library. */ + +#include <msg.h> +#include <mymalloc.h> +#include <vstring.h> +#include <vstream.h> +#include <msg_vstream.h> +#include <readlline.h> +#include <stringops.h> +#include <split_at.h> +#include <vstring_vstream.h> +#include <set_eugid.h> +#include <warn_stat.h> +#include <clean_env.h> +#include <dict_db.h> + +/* Global library. */ + +#include <tok822.h> +#include <mail_conf.h> +#include <mail_dict.h> +#include <mail_params.h> +#include <mail_version.h> +#include <mail_task.h> +#include <dict_proxy.h> +#include <mail_parm_split.h> +#include <maillog_client.h> + +/* Application-specific. */ + +#define STR vstring_str +#define LEN VSTRING_LEN + +#define POSTALIAS_FLAG_AS_OWNER (1<<0) /* open dest as owner of source */ +#define POSTALIAS_FLAG_SAVE_PERM (1<<1) /* copy access permission + * from source */ + +/* postalias - create or update alias database */ + +static void postalias(char *map_type, char *path_name, int postalias_flags, + int open_flags, int dict_flags) +{ + VSTREAM *NOCLOBBER source_fp; + VSTRING *line_buffer; + MKMAP *mkmap; + int lineno; + int last_line; + VSTRING *key_buffer; + VSTRING *value_buffer; + TOK822 *tok_list; + TOK822 *key_list; + TOK822 *colon; + TOK822 *value_list; + struct stat st; + mode_t saved_mask; + + /* + * Initialize. + */ + line_buffer = vstring_alloc(100); + key_buffer = vstring_alloc(100); + value_buffer = vstring_alloc(100); + if ((open_flags & O_TRUNC) == 0) { + /* Incremental mode. */ + source_fp = VSTREAM_IN; + vstream_control(source_fp, CA_VSTREAM_CTL_PATH("stdin"), CA_VSTREAM_CTL_END); + } else { + /* Create database. */ + if (strcmp(map_type, DICT_TYPE_PROXY) == 0) + msg_fatal("can't create maps via the proxy service"); + dict_flags |= DICT_FLAG_BULK_UPDATE; + if ((source_fp = vstream_fopen(path_name, O_RDONLY, 0)) == 0) + msg_fatal("open %s: %m", path_name); + } + if (fstat(vstream_fileno(source_fp), &st) < 0) + msg_fatal("fstat %s: %m", path_name); + + /* + * Turn off group/other read permissions as indicated in the source file. + */ + if ((postalias_flags & POSTALIAS_FLAG_SAVE_PERM) && S_ISREG(st.st_mode)) + saved_mask = umask(022 | (~st.st_mode & 077)); + + /* + * If running as root, run as the owner of the source file, so that the + * result shows proper ownership, and so that a bug in postalias does not + * allow privilege escalation. + */ + if ((postalias_flags & POSTALIAS_FLAG_AS_OWNER) && getuid() == 0 + && (st.st_uid != geteuid() || st.st_gid != getegid())) + set_eugid(st.st_uid, st.st_gid); + + /* + * Override the default per-table cache size for DB map (re)builds. We + * can't do this in the mkmap* functions because those don't have access + * to Postfix parameter settings. + * + * db_cache_size" is defined in util/dict_open.c and defaults to 128kB, + * which works well for the lookup code. + * + * We use a larger per-table cache when building ".db" files. For "hash" + * files performance degrades rapidly unless the memory pool is O(file + * size). + * + * For "btree" files performance is good with sorted input even for small + * memory pools, but with random input degrades rapidly unless the memory + * pool is O(file size). + */ + dict_db_cache_size = var_db_create_buf; + + /* + * Open the database, create it when it does not exist, truncate it when + * it does exist, and lock out any spectators. + */ + mkmap = mkmap_open(map_type, path_name, open_flags, dict_flags); + + /* + * And restore the umask, in case it matters. + */ + if ((postalias_flags & POSTALIAS_FLAG_SAVE_PERM) && S_ISREG(st.st_mode)) + umask(saved_mask); + + /* + * Trap "exceptions" so that we can restart a bulk-mode update after a + * recoverable error. + */ + for (;;) { + if (dict_isjmp(mkmap->dict) != 0 + && dict_setjmp(mkmap->dict) != 0 + && vstream_fseek(source_fp, SEEK_SET, 0) < 0) + msg_fatal("seek %s: %m", VSTREAM_PATH(source_fp)); + + /* + * Add records to the database. + */ + last_line = 0; + while (readllines(line_buffer, source_fp, &last_line, &lineno)) { + + /* + * First some UTF-8 checks sans casefolding. + */ + if ((mkmap->dict->flags & DICT_FLAG_UTF8_ACTIVE) + && !allascii(STR(line_buffer)) + && !valid_utf8_string(STR(line_buffer), LEN(line_buffer))) { + msg_warn("%s, line %d: non-UTF-8 input \"%s\"" + " -- ignoring this line", + VSTREAM_PATH(source_fp), lineno, STR(line_buffer)); + continue; + } + + /* + * Tokenize the input, so that we do the right thing when a + * quoted localpart contains special characters such as "@", ":" + * and so on. + */ + if ((tok_list = tok822_scan(STR(line_buffer), (TOK822 **) 0)) == 0) + continue; + + /* + * Enforce the key:value format. Disallow missing keys, + * multi-address keys, or missing values. In order to specify an + * empty string or value, enclose it in double quotes. + */ + if ((colon = tok822_find_type(tok_list, ':')) == 0 + || colon->prev == 0 || colon->next == 0 + || tok822_rfind_type(colon, ',')) { + msg_warn("%s, line %d: need name:value pair", + VSTREAM_PATH(source_fp), lineno); + tok822_free_tree(tok_list); + continue; + } + + /* + * Key must be local. XXX We should use the Postfix rewriting and + * resolving services to handle all address forms correctly. + * However, we can't count on the mail system being up when the + * alias database is being built, so we're guessing a bit. + */ + if (tok822_rfind_type(colon, '@') || tok822_rfind_type(colon, '%')) { + msg_warn("%s, line %d: name must be local", + VSTREAM_PATH(source_fp), lineno); + tok822_free_tree(tok_list); + continue; + } + + /* + * Split the input into key and value parts, and convert from + * token representation back to string representation. Convert + * the key to internal (unquoted) form, because the resolver + * produces addresses in internal form. Convert the value to + * external (quoted) form, because it will have to be re-parsed + * upon lookup. Discard the token representation when done. + */ + key_list = tok_list; + tok_list = 0; + value_list = tok822_cut_after(colon); + tok822_unlink(colon); + tok822_free(colon); + + tok822_internalize(key_buffer, key_list, TOK822_STR_DEFL); + tok822_free_tree(key_list); + + tok822_externalize(value_buffer, value_list, TOK822_STR_DEFL); + tok822_free_tree(value_list); + + /* + * Store the value under a case-insensitive key. + */ + mkmap_append(mkmap, STR(key_buffer), STR(value_buffer)); + if (mkmap->dict->error) + msg_fatal("table %s:%s: write error: %m", + mkmap->dict->type, mkmap->dict->name); + } + break; + } + + /* + * Update or append sendmail and NIS signatures. + */ + if ((open_flags & O_TRUNC) == 0) + mkmap->dict->flags |= DICT_FLAG_DUP_REPLACE; + + /* + * Sendmail compatibility: add the @:@ signature to indicate that the + * database is complete. This might be needed by NIS clients running + * sendmail. + */ + mkmap_append(mkmap, "@", "@"); + if (mkmap->dict->error) + msg_fatal("table %s:%s: write error: %m", + mkmap->dict->type, mkmap->dict->name); + + /* + * NIS compatibility: add time and master info. Unlike other information, + * this information MUST be written without a trailing null appended to + * key or value. + */ + mkmap->dict->flags &= ~DICT_FLAG_TRY1NULL; + mkmap->dict->flags |= DICT_FLAG_TRY0NULL; + vstring_sprintf(value_buffer, "%010ld", (long) time((time_t *) 0)); +#if (defined(HAS_NIS) || defined(HAS_NISPLUS)) + mkmap->dict->flags &= ~DICT_FLAG_FOLD_FIX; + mkmap_append(mkmap, "YP_LAST_MODIFIED", STR(value_buffer)); + mkmap_append(mkmap, "YP_MASTER_NAME", var_myhostname); +#endif + + /* + * Close the alias database, and release the lock. + */ + mkmap_close(mkmap); + + /* + * Cleanup. We're about to terminate, but it is a good sanity check. + */ + vstring_free(value_buffer); + vstring_free(key_buffer); + vstring_free(line_buffer); + if (source_fp != VSTREAM_IN) + vstream_fclose(source_fp); +} + +/* postalias_queries - apply multiple requests from stdin */ + +static int postalias_queries(VSTREAM *in, char **maps, const int map_count, + const int dict_flags) +{ + int found = 0; + VSTRING *keybuf = vstring_alloc(100); + DICT **dicts; + const char *map_name; + const char *value; + int n; + + /* + * Sanity check. + */ + if (map_count <= 0) + msg_panic("postalias_queries: bad map count"); + + /* + * Prepare to open maps lazily. + */ + dicts = (DICT **) mymalloc(sizeof(*dicts) * map_count); + for (n = 0; n < map_count; n++) + dicts[n] = 0; + + /* + * Perform all queries. Open maps on the fly, to avoid opening + * unnecessary maps. + */ + while (vstring_get_nonl(keybuf, in) != VSTREAM_EOF) { + for (n = 0; n < map_count; n++) { + if (dicts[n] == 0) + dicts[n] = ((map_name = split_at(maps[n], ':')) != 0 ? + dict_open3(maps[n], map_name, O_RDONLY, dict_flags) : + dict_open3(var_db_type, maps[n], O_RDONLY, dict_flags)); + if ((value = dict_get(dicts[n], STR(keybuf))) != 0) { + if (*value == 0) { + msg_warn("table %s:%s: key %s: empty string result is not allowed", + dicts[n]->type, dicts[n]->name, STR(keybuf)); + msg_warn("table %s:%s should return NO RESULT in case of NOT FOUND", + dicts[n]->type, dicts[n]->name); + } + vstream_printf("%s: %s\n", STR(keybuf), value); + found = 1; + break; + } + if (dicts[n]->error) + msg_fatal("table %s:%s: query error: %m", + dicts[n]->type, dicts[n]->name); + } + } + if (found) + vstream_fflush(VSTREAM_OUT); + + /* + * Cleanup. + */ + for (n = 0; n < map_count; n++) + if (dicts[n]) + dict_close(dicts[n]); + myfree((void *) dicts); + vstring_free(keybuf); + + return (found); +} + +/* postalias_query - query a map and print the result to stdout */ + +static int postalias_query(const char *map_type, const char *map_name, + const char *key, int dict_flags) +{ + DICT *dict; + const char *value; + + dict = dict_open3(map_type, map_name, O_RDONLY, dict_flags); + if ((value = dict_get(dict, key)) != 0) { + if (*value == 0) { + msg_warn("table %s:%s: key %s: empty string result is not allowed", + map_type, map_name, key); + msg_warn("table %s:%s should return NO RESULT in case of NOT FOUND", + map_type, map_name); + } + vstream_printf("%s\n", value); + } + if (dict->error) + msg_fatal("table %s:%s: query error: %m", dict->type, dict->name); + vstream_fflush(VSTREAM_OUT); + dict_close(dict); + return (value != 0); +} + +/* postalias_deletes - apply multiple requests from stdin */ + +static int postalias_deletes(VSTREAM *in, char **maps, const int map_count, + int dict_flags) +{ + int found = 0; + VSTRING *keybuf = vstring_alloc(100); + DICT **dicts; + const char *map_name; + int n; + int open_flags; + + /* + * Sanity check. + */ + if (map_count <= 0) + msg_panic("postalias_deletes: bad map count"); + + /* + * Open maps ahead of time. + */ + dicts = (DICT **) mymalloc(sizeof(*dicts) * map_count); + for (n = 0; n < map_count; n++) { + map_name = split_at(maps[n], ':'); + if (map_name && strcmp(maps[n], DICT_TYPE_PROXY) == 0) + open_flags = O_RDWR | O_CREAT; /* XXX */ + else + open_flags = O_RDWR; + dicts[n] = (map_name != 0 ? + dict_open3(maps[n], map_name, open_flags, dict_flags) : + dict_open3(var_db_type, maps[n], open_flags, dict_flags)); + } + + /* + * Perform all requests. + */ + while (vstring_get_nonl(keybuf, in) != VSTREAM_EOF) { + for (n = 0; n < map_count; n++) { + found |= (dict_del(dicts[n], STR(keybuf)) == 0); + if (dicts[n]->error) + msg_fatal("table %s:%s: delete error: %m", + dicts[n]->type, dicts[n]->name); + } + } + + /* + * Cleanup. + */ + for (n = 0; n < map_count; n++) + if (dicts[n]) + dict_close(dicts[n]); + myfree((void *) dicts); + vstring_free(keybuf); + + return (found); +} + +/* postalias_delete - delete a key value pair from a map */ + +static int postalias_delete(const char *map_type, const char *map_name, + const char *key, int dict_flags) +{ + DICT *dict; + int status; + int open_flags; + + if (strcmp(map_type, DICT_TYPE_PROXY) == 0) + open_flags = O_RDWR | O_CREAT; /* XXX */ + else + open_flags = O_RDWR; + dict = dict_open3(map_type, map_name, open_flags, dict_flags); + status = dict_del(dict, key); + if (dict->error) + msg_fatal("table %s:%s: delete error: %m", dict->type, dict->name); + dict_close(dict); + return (status == 0); +} + +/* postalias_seq - print all map entries to stdout */ + +static void postalias_seq(const char *map_type, const char *map_name, + int dict_flags) +{ + DICT *dict; + const char *key; + const char *value; + int func; + + if (strcmp(map_type, DICT_TYPE_PROXY) == 0) + msg_fatal("can't sequence maps via the proxy service"); + dict = dict_open3(map_type, map_name, O_RDONLY, dict_flags); + for (func = DICT_SEQ_FUN_FIRST; /* void */ ; func = DICT_SEQ_FUN_NEXT) { + if (dict_seq(dict, func, &key, &value) != 0) + break; + if (*key == 0) { + msg_warn("table %s:%s: empty lookup key value is not allowed", + map_type, map_name); + } else if (*value == 0) { + msg_warn("table %s:%s: key %s: empty string result is not allowed", + map_type, map_name, key); + msg_warn("table %s:%s should return NO RESULT in case of NOT FOUND", + map_type, map_name); + } + vstream_printf("%s: %s\n", key, value); + } + if (dict->error) + msg_fatal("table %s:%s: sequence error: %m", dict->type, dict->name); + vstream_fflush(VSTREAM_OUT); + dict_close(dict); +} + +/* usage - explain */ + +static NORETURN usage(char *myname) +{ + msg_fatal("usage: %s [-Nfinoprsuvw] [-c config_dir] [-d key] [-q key] [map_type:]file...", + myname); +} + +MAIL_VERSION_STAMP_DECLARE; + +int main(int argc, char **argv) +{ + char *path_name; + int ch; + int fd; + char *slash; + struct stat st; + int postalias_flags = POSTALIAS_FLAG_AS_OWNER | POSTALIAS_FLAG_SAVE_PERM; + int open_flags = O_RDWR | O_CREAT | O_TRUNC; + int dict_flags = (DICT_FLAG_DUP_WARN | DICT_FLAG_FOLD_FIX + | DICT_FLAG_UTF8_REQUEST); + char *query = 0; + char *delkey = 0; + int sequence = 0; + int found; + ARGV *import_env; + + /* + * Fingerprint executables and core dumps. + */ + MAIL_VERSION_STAMP_ALLOCATE; + + /* + * Be consistent with file permissions. + */ + umask(022); + + /* + * To minimize confusion, make sure that the standard file descriptors + * are open before opening anything else. XXX Work around for 44BSD where + * fstat can return EBADF on an open file descriptor. + */ + for (fd = 0; fd < 3; fd++) + if (fstat(fd, &st) == -1 + && (close(fd), open("/dev/null", O_RDWR, 0)) != fd) + msg_fatal("open /dev/null: %m"); + + /* + * Process environment options as early as we can. We are not set-uid, + * and we are supposed to be running in a controlled environment. + */ + if (getenv(CONF_ENV_VERB)) + msg_verbose = 1; + + /* + * Initialize. Set up logging. Read the global configuration file after + * parsing command-line arguments. + */ + if ((slash = strrchr(argv[0], '/')) != 0 && slash[1]) + argv[0] = slash + 1; + msg_vstream_init(argv[0], VSTREAM_ERR); + maillog_client_init(mail_task(argv[0]), MAILLOG_CLIENT_FLAG_NONE); + + /* + * Check the Postfix library version as soon as we enable logging. + */ + MAIL_VERSION_CHECK; + + /* + * Parse JCL. + */ + while ((ch = GETOPT(argc, argv, "Nc:d:finopq:rsuvw")) > 0) { + switch (ch) { + default: + usage(argv[0]); + break; + case 'N': + dict_flags |= DICT_FLAG_TRY1NULL; + dict_flags &= ~DICT_FLAG_TRY0NULL; + break; + case 'c': + if (setenv(CONF_ENV_PATH, optarg, 1) < 0) + msg_fatal("out of memory"); + break; + case 'd': + if (sequence || query || delkey) + msg_fatal("specify only one of -s -q or -d"); + delkey = optarg; + break; + case 'f': + dict_flags &= ~DICT_FLAG_FOLD_FIX; + break; + case 'i': + open_flags &= ~O_TRUNC; + break; + case 'n': + dict_flags |= DICT_FLAG_TRY0NULL; + dict_flags &= ~DICT_FLAG_TRY1NULL; + break; + case 'o': + postalias_flags &= ~POSTALIAS_FLAG_AS_OWNER; + break; + case 'p': + postalias_flags &= ~POSTALIAS_FLAG_SAVE_PERM; + break; + case 'q': + if (sequence || query || delkey) + msg_fatal("specify only one of -s -q or -d"); + query = optarg; + break; + case 'r': + dict_flags &= ~(DICT_FLAG_DUP_WARN | DICT_FLAG_DUP_IGNORE); + dict_flags |= DICT_FLAG_DUP_REPLACE; + break; + case 's': + if (query || delkey) + msg_fatal("specify only one of -s or -q or -d"); + sequence = 1; + break; + case 'u': + dict_flags &= ~DICT_FLAG_UTF8_REQUEST; + break; + case 'v': + msg_verbose++; + break; + case 'w': + dict_flags &= ~(DICT_FLAG_DUP_WARN | DICT_FLAG_DUP_REPLACE); + dict_flags |= DICT_FLAG_DUP_IGNORE; + break; + } + } + mail_conf_read(); + /* Enforce consistent operation of different Postfix parts. */ + import_env = mail_parm_split(VAR_IMPORT_ENVIRON, var_import_environ); + update_env(import_env->argv); + argv_free(import_env); + /* Re-evaluate mail_task() after reading main.cf. */ + maillog_client_init(mail_task(argv[0]), MAILLOG_CLIENT_FLAG_NONE); + mail_dict_init(); + + /* + * Use the map type specified by the user, or fall back to a default + * database type. + */ + if (delkey) { /* remove entry */ + if (optind + 1 > argc) + usage(argv[0]); + if (strcmp(delkey, "-") == 0) + exit(postalias_deletes(VSTREAM_IN, argv + optind, argc - optind, + dict_flags | DICT_FLAG_LOCK) == 0); + found = 0; + while (optind < argc) { + if ((path_name = split_at(argv[optind], ':')) != 0) { + found |= postalias_delete(argv[optind], path_name, delkey, + dict_flags | DICT_FLAG_LOCK); + } else { + found |= postalias_delete(var_db_type, argv[optind], delkey, + dict_flags | DICT_FLAG_LOCK); + } + optind++; + } + exit(found ? 0 : 1); + } else if (query) { /* query map(s) */ + if (optind + 1 > argc) + usage(argv[0]); + if (strcmp(query, "-") == 0) + exit(postalias_queries(VSTREAM_IN, argv + optind, argc - optind, + dict_flags | DICT_FLAG_LOCK) == 0); + while (optind < argc) { + if ((path_name = split_at(argv[optind], ':')) != 0) { + found = postalias_query(argv[optind], path_name, query, + dict_flags | DICT_FLAG_LOCK); + } else { + found = postalias_query(var_db_type, argv[optind], query, + dict_flags | DICT_FLAG_LOCK); + } + if (found) + exit(0); + optind++; + } + exit(1); + } else if (sequence) { + while (optind < argc) { + if ((path_name = split_at(argv[optind], ':')) != 0) { + postalias_seq(argv[optind], path_name, + dict_flags | DICT_FLAG_LOCK); + } else { + postalias_seq(var_db_type, argv[optind], + dict_flags | DICT_FLAG_LOCK); + } + exit(0); + } + exit(1); + } else { /* create/update map(s) */ + if (optind + 1 > argc) + usage(argv[0]); + while (optind < argc) { + if ((path_name = split_at(argv[optind], ':')) != 0) { + postalias(argv[optind], path_name, postalias_flags, + open_flags, dict_flags); + } else { + postalias(var_db_type, argv[optind], postalias_flags, + open_flags, dict_flags); + } + optind++; + } + exit(0); + } +} |