source: TI05-delivery/trunk/src/bbftp-server-3.2.0/bbftpd/bbftpd_daemon.c @ 1328

Subversion URL: http://proj.badc.rl.ac.uk/svn/ndg/TI05-delivery/trunk/src/bbftp-server-3.2.0/bbftpd/bbftpd_daemon.c@1328
Revision 1328, 7.4 KB checked in by spascoe, 13 years ago (diff)

I've created a bbftpd log facility to replace syslog.
At present it allows you to log messages to a file in addition
to syslog. This should help testing on other machines.

Line 
1/*
2 * bbftpd/bbftpd_daemon.c
3 * Copyright (C) 1999, 2000, 2001, 2002 IN2P3, CNRS
4 * bbftp@in2p3.fr
5 * http://doc.in2p3.fr/bbftp
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
20 */ 
21
22/****************************************************************************
23
24 
25 
26 bbftpd_daemon.c    v 0.0.0  1999/11/24
27                    v 1.3.0  2000/03/16
28                    v 1.6.1  2000/03/30 - Use sysconf instead of OPEN_MAX
29                    v 1.8.4  2000/04/21 - Seed the randoma generator
30                    v 1.8.7  2000/05/24 - Include version.h
31                    v 1.8.10 2000/08/11 - Portage to Linux
32                    v 1.9.3  2000/10/12 - Define the socket first to be able
33                                          to give information to the user
34                    v 1.9.4  2000/10/16 - Supress %m
35                    v 2.0.0  2000/12/13 - Supress be_daemon and controlsock
36                                          as global parameters
37                                        - Add parameters incontrolsock and
38                                          outcontrolsock for bbftp v2
39                    v 2.0.1  2001/04/23 - Correct indentation
40                    v 2.0.2  2001/05/04 - Correct include for RFIO
41                    v 2.1.0  2001/06/11 - Change file name
42
43*****************************************************************************/
44#include <bbftpd.h>
45
46#include <netdb.h>
47#include <netinet/in.h>
48#include <netinet/tcp.h>
49#include <stdio.h>
50#include <bbftpd_log.h>
51#include <sys/socket.h>
52#if TIME_WITH_SYS_TIME
53# include <sys/time.h>
54# include <time.h>
55#else
56# if HAVE_SYS_TIME_H
57#  include <sys/time.h>
58# else
59#  include <time.h>
60# endif
61#endif
62#include <unistd.h>
63#include <utime.h>
64#if HAVE_STRING_H
65# include <string.h>
66#endif
67
68#include <common.h>
69#include <daemon.h>
70#include <daemon_proto.h>
71#include <version.h>
72#include <openssl/err.h>
73#include <openssl/rand.h>
74/*
75** Common variables for BBFTP protocole version 1 and 2
76*/
77extern int  newcontrolport ;
78extern char daemonchar[50] ;
79/*
80** Variables for BBFTP protocole version 1
81*/
82extern int msgsock ;
83/*
84** Variables for BBFTP protocole version 2
85*/
86extern int incontrolsock ;
87extern int outcontrolsock ;
88
89#ifdef NDG_PYTHON_EMBED
90int do_daemon(int argc, char **argv, char **envp)
91#else
92void do_daemon(int argc,char **argv,char **envp)
93#endif
94{
95
96    int        prpg ;
97    int        i ;
98    int     retcode ;
99    int     controlsock ;
100    struct sockaddr_in server;
101    int     on = 1;
102    int     nfds ;
103    int     pid;
104   
105    char    buffrand[NBITSINKEY] ;
106    struct timeval tp ;
107    unsigned int seed ;
108   
109    controlsock = socket ( AF_INET, SOCK_STREAM, IPPROTO_TCP ) ;
110    if ( controlsock < 0 ) {
111        bbftpd_log(BBFTPD_ERR, "Cannot create socket to listen on: %s",strerror(errno));
112        fprintf(stderr,"Cannot create socket to listen on: %s\n",strerror(errno)) ;
113        exit(1) ;
114    }
115    if ( setsockopt(controlsock,SOL_SOCKET, SO_REUSEADDR,(char *)&on,sizeof(on)) < 0 ) {
116        bbftpd_log(BBFTPD_ERR,"Cannot set SO_REUSEADDR on control socket : %s",strerror(errno)) ;
117        fprintf(stderr,"Cannot set SO_REUSEADDR on control socket : %s\n ",strerror(errno)) ;
118        exit(1) ;
119    }
120    server.sin_family = AF_INET ;
121    server.sin_addr.s_addr = INADDR_ANY ;
122    server.sin_port = htons(newcontrolport);
123    if ( bind (controlsock,(struct sockaddr *) &server, sizeof(server) ) < 0 ) {
124        bbftpd_log(BBFTPD_ERR,"Error binding control socket : %s",strerror(errno)) ;
125        fprintf(stderr,"Error binding control socket : %s\n ",strerror(errno)) ;
126        exit(1) ;
127    }
128    if ( listen(controlsock,100) < 0 ) {
129        bbftpd_log(BBFTPD_ERR,"Error listening control socket : %s",strerror(errno)) ;
130        fprintf(stderr,"Error listening control socket : %s\n ",strerror(errno)) ;
131        exit(1) ;
132    }
133    /* Fork - so I'm not the owner of the process group any more */
134    retcode = fork();
135    if (retcode < 0) {
136        bbftpd_log(BBFTPD_ERR, "Cannot fork %s",strerror(errno));
137        exit(1);
138    }
139#ifdef NDG_PYTHON_EMBED
140    /* Return the daemon's PID */
141    if (retcode > 0) {
142      close(controlsock);
143      return retcode;
144    }
145#else
146    /* No need for the parent any more */
147    if (retcode > 0) _exit(0);
148#endif
149    prpg = 0 ;
150    prpg = setsid () ;     /* disassoiciate from control terminal */
151    if ( prpg < 0 ) {
152        bbftpd_log(BBFTPD_ERR,"Cannot daemonise: %s",strerror(errno)) ;
153        exit(1) ;
154    }
155    /* Close off all file descriptors and reopen bbftpd_log */
156
157    nfds = sysconf(_SC_OPEN_MAX) ;
158
159    bbftpd_closelog();
160    for (i = 0; i <= nfds; i++) {
161        if ( i != controlsock) close(i);
162    }
163#ifdef NO_SYSLOG
164    bbftpd_openlogfile("bbftpd.log", daemonchar, LOG_PID | LOG_NDELAY, BBFTPD_FACILITY);
165#else
166    bbftpd_openlog(daemonchar, LOG_PID | LOG_NDELAY, BBFTPD_FACILITY);
167#endif
168    /* log PID in /var/run/bbftpd.pid */
169    {
170        FILE *f;
171        if ((f = fopen("/var/run/bbftpd.pid", "w")) != NULL) {
172            fprintf(f, "%d", getpid());
173            fclose(f);
174        }
175    }
176
177    /* junk stderr */
178    (void) freopen("/dev/null", "w", stderr);
179   
180    bbftpd_log(BBFTPD_DEBUG,"Starting bbftpd in background mode") ;
181    if ( bbftpd_blockallsignals() < 0 ) {
182        exit(1) ;
183    }
184    /*
185    ** Load the error message from the crypto lib
186    */
187    ERR_load_crypto_strings() ;
188    /*
189    ** Initialize the buffrand buffer which is giong to be used to initialize the
190    ** random generator
191    */
192    /*
193    ** Take the usec to initialize the random session
194    */
195    gettimeofday(&tp,NULL) ;
196    seed = tp.tv_usec ;
197    srandom(seed) ;
198    for (i=0; i < sizeof(buffrand) ; i++) {
199        buffrand[i] = random() ;
200    }
201    /*
202    ** Initialize the random generator
203    */
204    RAND_seed(buffrand,NBITSINKEY) ;
205    while (1) {
206
207        msgsock = accept(controlsock, 0, 0);
208        if (msgsock < 0) {
209             bbftpd_log(BBFTPD_ERR, "Accept failed: %s",strerror(errno));
210            sleep(1);
211            continue;
212        }
213            /* Fork off a handler */
214        pid = fork();
215        if (pid < 0) {
216            bbftpd_log(BBFTPD_ERR, "failed to fork: %s",strerror(errno));
217             sleep(1);
218            continue;
219        }
220        if (pid == 0) {
221            /* I am that forked off child */
222            bbftpd_closelog();
223            /* Make sure that stdin/stdout are the new socket */
224            /* Only parent needs controlsock */
225            if (controlsock != 0 && controlsock != 1)
226                close(controlsock);
227#ifdef NO_SYSLOG
228                bbftpd_openlogfile("bbftpd.log", daemonchar, LOG_PID | LOG_NDELAY, BBFTPD_FACILITY);
229#else
230                openlog(daemonchar, LOG_PID | LOG_NDELAY, BBFTPD_FACILITY);
231#endif
232                incontrolsock = msgsock ;
233                outcontrolsock = msgsock ;
234#ifdef NDG_PYTHON_EMBED
235                return 0;
236#else
237                return;
238#endif
239           
240                }
241
242            /* I am the parent */
243        close(msgsock);
244   
245    }
246}
247
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