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/*
* Copyright (c) 2008 Gilles Chehade <gilles@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/tree.h>
#include <sys/queue.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <ctype.h>
#include <db.h>
#include <err.h>
#include <errno.h>
#include <event.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include <util.h>
#include "smtpd.h"
extern char *__progname;
static int usage(void);
int parse_aliases(const char *);
int parse_entry(char *, size_t, size_t);
DB *db;
static int dflag;
int
main(int argc, char *argv[])
{
int ch;
char pathname[MAXPATHLEN];
char dbname[MAXPATHLEN];
while ((ch = getopt(argc, argv, "dh")) != -1) {
switch (ch) {
case 'd':
dflag = 1;
break;
case 'h':
default:
return usage();
}
}
argc -= optind;
argv += optind;
if (argc != 0)
return usage();
bzero(pathname, MAXPATHLEN);
snprintf(pathname, MAXPATHLEN, "/etc/mail/aliases.XXXXX");
if (mkdtemp(pathname) == NULL)
errx(1, "failed to create temporary directory");
bzero(dbname, MAXPATHLEN);
snprintf(dbname, MAXPATHLEN, "%s/aliases.db", pathname);
db = dbopen(dbname, O_CREAT|O_EXLOCK|O_RDWR|O_SYNC, 0644, DB_HASH,
NULL);
if (db == NULL) {
warn("dbopen");
goto bad;
}
if (! parse_aliases(PATH_ALIASES)) {
warnx("syntax error in aliases file");
goto bad;
}
db->close(db);
if (rename(dbname, PATH_ALIASESDB) == -1) {
warn("rename");
goto bad;
}
if (chmod(PATH_ALIASESDB, 0644) == -1)
err(1, "chmod");
if (rmdir(pathname) == -1)
err(1, "rmdir");
return EX_OK;
bad:
if (dbname[0] != '\0')
if (unlink(dbname) == -1)
err(1, "unlink: %s", dbname);
if (rmdir(pathname) == -1)
err(1, "rmdir: %s", pathname);
return 1;
}
static int
usage(void)
{
fprintf(stderr, "usage: %s filename\n", __progname);
return EX_USAGE;
}
int
parse_aliases(const char *filename)
{
FILE *fp;
char *line;
size_t len;
size_t lineno = 0;
char delim[] = { '\\', '\\', '#' };
fp = fopen(filename, "r");
if (fp == NULL)
errx(1, "failed to open aliases file");
while ((line = fparseln(fp, &len, &lineno, delim, 0)) != NULL) {
if (len == 0)
continue;
parse_entry(line, len, lineno);
free(line);
}
fclose(fp);
return 1;
}
int
parse_entry(char *line, size_t len, size_t lineno)
{
char *name;
char *delim;
char *rcpt;
char *subrcpt;
struct alias alias;
int ret;
DBT key;
DBT val;
name = line;
while (*name && isspace(*name))
++name;
rcpt = delim = strchr(name, ':');
if (name == rcpt)
goto bad;
*delim-- = 0;
rcpt++;
while (isspace(*delim))
*delim-- = '\0';
rcpt++;
while (*rcpt && isspace(*rcpt))
++rcpt;
if (*rcpt == '\0')
goto bad;
/* At this point, name points to nul-terminate name */
for (; (subrcpt = strsep(&rcpt, ",")) != NULL;) {
while (*subrcpt && isspace(*subrcpt))
++subrcpt;
if (*subrcpt == '\0')
continue;
delim = subrcpt + strlen(subrcpt);
delim--;
while (isspace(*delim))
*delim-- = '\0';
key.data = name;
key.size = strlen(name) + 1;
if ((ret = db->get(db, &key, &val, 0)) == -1)
errx(1, "db->get()");
if (ret == 1) {
val.data = NULL;
val.size = 0;
}
if (! alias_parse(&alias, subrcpt))
goto bad;
if (val.size == 0) {
val.size = sizeof(struct alias);
val.data = &alias;
if ((ret = db->put(db, &key, &val, 0)) == -1)
errx(1, "db->get()");
}
else {
void *p;
p = calloc(val.size + sizeof(alias), 1);
if (p == NULL)
errx(1, "calloc: memory exhausted");
memcpy(p, val.data, val.size);
memcpy((u_int8_t *)p + val.size, &alias, sizeof(alias));
val.data = p;
val.size += sizeof(alias);
if ((ret = db->put(db, &key, &val, 0)) == -1)
errx(1, "db->get()");
free(p);
}
db->sync(db, 0);
}
return 1;
bad:
warnx("line %zd: invalid entry: %s", lineno, line);
return 0;
}
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