| Current File : //root/postfix-3.2.0/src/postalias/postalias.c |
/*++
/* 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 the 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.
/*
/* 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 \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 \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 \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). 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 parameters 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..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".
/* 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.
/* 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 <msg_syslog.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>
/* Global library. */
#include <tok822.h>
#include <mail_conf.h>
#include <mail_dict.h>
#include <mail_params.h>
#include <mail_version.h>
#include <mkmap.h>
#include <mail_task.h>
#include <dict_proxy.h>
#include <mail_parm_split.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);
/*
* 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 and
* extract configuration information.
*/
if ((slash = strrchr(argv[0], '/')) != 0 && slash[1])
argv[0] = slash + 1;
msg_vstream_init(argv[0], VSTREAM_ERR);
msg_syslog_init(mail_task(argv[0]), LOG_PID, LOG_FACILITY);
/*
* 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. */
msg_syslog_init(mail_task(argv[0]), LOG_PID, LOG_FACILITY);
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);
}
}