1 /* utftpd_novc: the "no version control" version control */ 2 3 /* 4 * Copyright (C) 1999 Uwe Ohse 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 19 */ 20 21 #include "config.h" 22 #include <sys/types.h> 23 #include <sys/ioctl.h> 24 #include <sys/stat.h> 25 #include <fcntl.h> 26 #include <netinet/in.h> 27 28 #include "no_tftp.h" 29 30 #include <syslog.h> 31 #include <errno.h> 32 #include <string.h> 33 #include <unistd.h> 34 #include "utftpd.h" 35 36 /* every file is under "no version control" */ 37 static int 38 novc_test(const char *filename, struct utftpd_ctrl *flags) 39 { 40 (void) filename; 41 (void) flags; 42 return 0; 43 } 44 45 static int 46 novc_commit (const char *comment, struct utftpd_ctrl *flags) 47 { 48 (void) comment; 49 #ifdef HAVE_FSYNC 50 if (fsync(flags->filefd)==-1) { 51 syslog(LOG_ERR,"unable to fsync: %s", strerror(errno)); 52 do_nak(flags->remotefd,EUNDEF,"unable to fsync"); 53 _exit(1); 54 } 55 #else 56 # ifndef (O_SYNC) 57 sync(); 58 # endif 59 #endif 60 if (close (flags->filefd) == -1) { 61 syslog(LOG_ERR,"unable to close: %s", strerror(errno)); 62 do_nak(flags->remotefd,EUNDEF,"unable to close"); 63 _exit(1); 64 } 65 return 0; 66 } 67 68 static int 69 novc_checkout(int mode, struct utftpd_ctrl *flags) 70 { 71 int fd; 72 #define ADD_ON 0 73 #ifndef HAVE_FSYNC 74 # ifdef (O_SYNC) 75 # undef ADD_ON 76 # define ADD_ON O_SYNC 77 # endif 78 #endif 79 80 if (mode==TSG_READ) { 81 fd=open(flags->filename,O_RDONLY); 82 } else if (mode==TSG_CREATE) { 83 fd=open(flags->filename,O_WRONLY|O_CREAT|O_EXCL|ADD_ON,0644); 84 } else { 85 fd=open(flags->filename,O_WRONLY|O_TRUNC|ADD_ON,0644); 86 } 87 if (fd==-1) { 88 const char *er=strerror(errno); 89 syslog(LOG_ERR,"open %s: %s",flags->filename,er); 90 /* magic stuff. Basically this is catastropheprevention in case of a TFTP read 91 * request to a broadcast address. 92 */ 93 if (mode==TSG_READ && opt_suppress_naks && *flags->origfilename!='/') { 94 if (opt_verbose) syslog(LOG_INFO,"suppressing NAK for nonexistant file"); 95 _exit(0); 96 } 97 do_nak(flags->remotefd,EUNDEF,er); 98 _exit(1); 99 } 100 flags->filefd=fd; 101 return 0; 102 } 103 104 105 struct utftpd_vc utftpd_novc={ 106 novc_test, 107 novc_commit, 108 novc_checkout, 109 NULL 110 }; 111