masqmail

annotate src/mservdetect.c @ 421:f37384470855

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Changed lockdir to /var/lock/masqmail; Create lockdir and piddir on startup. Moved the lockdir out of the spool dir. (When /var/lock is a ramdisk we do well to have the lock files there.) Added the new configure option --with-lockdir to change that location. Nontheless, if we run_as_user, then lock files are always stored in the spool dir directly. Instead of installing the lockdir and piddir at installation time, we create them on startup time now if they are missing. This is necessary if lockdir or piddir are a tmpfs.
author markus schnalke <meillo@marmaro.de>
date Wed, 30 May 2012 09:38:38 +0200
parents 41958685480d
children
rev   line source
meillo@367 1 /*
meillo@367 2 ** MasqMail
meillo@367 3 ** Copyright (C) 1999-2001 Oliver Kurth
meillo@367 4 ** Copyright (C) 2010 markus schnalke <meillo@marmaro.de>
meillo@367 5 **
meillo@367 6 ** This program is free software; you can redistribute it and/or modify
meillo@367 7 ** it under the terms of the GNU General Public License as published by
meillo@367 8 ** the Free Software Foundation; either version 2 of the License, or
meillo@367 9 ** (at your option) any later version.
meillo@367 10 **
meillo@367 11 ** This program is distributed in the hope that it will be useful,
meillo@367 12 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@367 13 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
meillo@367 14 ** GNU General Public License for more details.
meillo@367 15 **
meillo@367 16 ** You should have received a copy of the GNU General Public License
meillo@367 17 ** along with this program; if not, write to the Free Software
meillo@367 18 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
meillo@0 19 */
meillo@0 20
meillo@164 21
meillo@0 22 #include "masqmail.h"
meillo@0 23 #include "readsock.h"
meillo@0 24
meillo@0 25
meillo@187 26 gboolean
meillo@366 27 init_sockaddr2(struct sockaddr_in *name, gchar *addr, int port)
meillo@187 28 {
meillo@187 29 struct hostent *he;
meillo@187 30 struct in_addr ia;
meillo@187 31
meillo@188 32 if (inet_aton(addr, &ia) != 0) {
meillo@187 33 /* IP address */
meillo@187 34 memcpy(&(name->sin_addr), &ia, sizeof(name->sin_addr));
meillo@187 35 } else {
meillo@188 36 if ((he = gethostbyname(addr)) == NULL) {
meillo@188 37 fprintf(stderr, "local address '%s' unknown. (deleting)\n", addr);
meillo@187 38 return FALSE;
meillo@187 39 }
meillo@187 40 memcpy(&(name->sin_addr), he->h_addr, sizeof(name->sin_addr));
meillo@187 41 }
meillo@187 42 name->sin_family = AF_INET;
meillo@188 43 name->sin_port = htons(port);
meillo@187 44
meillo@187 45 return TRUE;
meillo@187 46 }
meillo@187 47
meillo@187 48
meillo@164 49 gchar*
meillo@366 50 mserver_detect_online(gchar *addr, int port)
meillo@164 51 {
meillo@164 52 struct sockaddr_in saddr;
meillo@164 53 gchar *ret = NULL;
meillo@164 54
meillo@188 55 if (!init_sockaddr2(&saddr, addr, port)) {
meillo@187 56 return NULL;
meillo@187 57 }
meillo@164 58
meillo@187 59 int sock = socket(PF_INET, SOCK_STREAM, 0);
meillo@187 60 int dup_sock;
meillo@187 61 if (connect(sock, (struct sockaddr *) (&saddr), sizeof(saddr)) != 0) {
meillo@187 62 return NULL;
meillo@187 63 }
meillo@164 64
meillo@187 65 FILE *in, *out;
meillo@187 66 char buf[256];
meillo@187 67
meillo@187 68 dup_sock = dup(sock);
meillo@187 69 out = fdopen(sock, "w");
meillo@187 70 in = fdopen(dup_sock, "r");
meillo@187 71
meillo@187 72 if (!read_sockline(in, buf, 256, 15, READSOCKL_CHUG)) {
meillo@187 73 return NULL;
meillo@187 74 }
meillo@187 75
meillo@367 76 /*
meillo@367 77 ** this is the protocol (reverse engineered):
meillo@367 78 **
meillo@367 79 ** S: READY
meillo@367 80 ** C: STAT
meillo@367 81 ** |
meillo@367 82 ** +----------------+-----------------+
meillo@367 83 ** | | |
meillo@367 84 ** S: DOWN S: UP foo:-1 S: UP foo:1
meillo@367 85 ** C: QUIT C: QUIT C: QUIT
meillo@367 86 **
meillo@367 87 ** -> offline -> offline -> online
meillo@367 88 ** `foo' gets printed
meillo@367 89 **
meillo@187 90 */
meillo@187 91
meillo@187 92 if (strncmp(buf, "READY", 5) == 0) {
meillo@187 93 fprintf(out, "STAT\n");
meillo@187 94 fflush(out);
meillo@187 95 if (read_sockline(in, buf, 256, 15, READSOCKL_CHUG)) {
meillo@187 96 if (strncmp(buf, "DOWN", 4) == 0) {
meillo@187 97 ret = NULL;
meillo@187 98 } else if (strncmp(buf, "UP", 2) == 0) {
meillo@187 99 gchar *p = buf + 3;
meillo@187 100 while ((*p != ':') && *p) {
meillo@187 101 p++;
meillo@187 102 }
meillo@187 103 if (*p) {
meillo@187 104 *p = '\0';
meillo@187 105 p++;
meillo@187 106 if ((atoi(p) >= 0) && *p) {
meillo@187 107 /* `UP foo:N', where `N' is a non-negative number */
meillo@187 108 ret = g_strdup(buf + 3);
meillo@164 109 }
meillo@187 110 } else {
meillo@187 111 fprintf(stderr, "unexpected response from mserver after STAT cmd: %s", buf);
meillo@164 112 }
meillo@187 113 } else {
meillo@187 114 fprintf(stderr, "unexpected response from mserver after STAT cmd: %s", buf);
meillo@164 115 }
meillo@164 116 }
meillo@164 117 }
meillo@187 118 fprintf(out, "QUIT");
meillo@187 119 fflush(out);
meillo@187 120
meillo@187 121 close(sock);
meillo@187 122 close(dup_sock);
meillo@187 123 fclose(in);
meillo@187 124 fclose(out);
meillo@187 125
meillo@164 126 return ret;
meillo@164 127 }
meillo@164 128
meillo@0 129
meillo@10 130 int
meillo@10 131 main(int argc, char *argv[])
meillo@0 132 {
meillo@366 133 gchar *addr;
meillo@188 134 int port;
meillo@187 135 gchar *name;
meillo@0 136
meillo@187 137 if (argc != 3) {
meillo@187 138 fprintf(stderr, "usage: %s HOST PORT\n", argv[0]);
meillo@187 139 return 1;
meillo@187 140 }
meillo@0 141
meillo@188 142 addr = argv[1];
meillo@188 143 port = atoi(argv[2]);
meillo@0 144
meillo@188 145 name = mserver_detect_online(addr, port);
meillo@187 146
meillo@187 147 if (name) {
meillo@10 148 printf("%s\n", name);
meillo@187 149 return 0;
meillo@10 150 }
meillo@187 151 return 1;
meillo@0 152 }