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1.1 root 1: /* nopen.c */
2:
3: /* Network open functions (nopen and fnopen) */
4:
1.1.1.2 ! root 5: /* $Id: nopen.c,v 1.27 2010/06/15 22:54:35 rswindell Exp $ */
1.1 root 6:
7: /****************************************************************************
8: * @format.tab-size 4 (Plain Text/Source Code File Header) *
9: * @format.use-tabs true (see http://www.synchro.net/ptsc_hdr.html) *
10: * *
1.1.1.2 ! root 11: * Copyright 2010 Rob Swindell - http://www.synchro.net/copyright.html *
1.1 root 12: * *
13: * This program is free software; you can redistribute it and/or *
14: * modify it under the terms of the GNU General Public License *
15: * as published by the Free Software Foundation; either version 2 *
16: * of the License, or (at your option) any later version. *
17: * See the GNU General Public License for more details: gpl.txt or *
18: * http://www.fsf.org/copyleft/gpl.html *
19: * *
20: * Anonymous FTP access to the most recent released source is available at *
21: * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net *
22: * *
23: * Anonymous CVS access to the development source and modification history *
24: * is available at cvs.synchro.net:/cvsroot/sbbs, example: *
25: * cvs -d :pserver:[email protected]:/cvsroot/sbbs login *
26: * (just hit return, no password is necessary) *
27: * cvs -d :pserver:[email protected]:/cvsroot/sbbs checkout src *
28: * *
29: * For Synchronet coding style and modification guidelines, see *
30: * http://www.synchro.net/source.html *
31: * *
32: * You are encouraged to submit any modifications (preferably in Unix diff *
33: * format) via e-mail to [email protected] *
34: * *
35: * Note: If this box doesn't appear square, then you need to fix your tabs. *
36: ****************************************************************************/
37:
38: #include "sbbs.h"
39: #include "crc32.h"
40:
41: /****************************************************************************/
1.1.1.2 ! root 42: /* Network open function. Opens all files DENYALL, DENYWRITE, or DENYNONE */
! 43: /* depending on access, and retries LOOP_NOPEN number of times if the */
! 44: /* attempted file is already open or denying access for some other reason. */
! 45: /* All files are opened in BINARY mode. */
1.1 root 46: /****************************************************************************/
47: int nopen(const char* str, int access)
48: {
49: int file,share,count=0;
50:
51: if(access&O_DENYNONE) {
52: share=SH_DENYNO;
53: access&=~O_DENYNONE;
54: }
55: else if((access&~(O_TEXT|O_BINARY))==O_RDONLY)
56: share=SH_DENYWR;
57: else
58: share=SH_DENYRW;
59:
60: #if !defined(__unix__) /* Basically, a no-op on Unix anyway */
61: if(!(access&O_TEXT))
62: access|=O_BINARY;
63: #endif
1.1.1.2 ! root 64: while(((file=sopen(str,access,share,DEFFILEMODE))==-1)
1.1 root 65: && (errno==EACCES || errno==EAGAIN || errno==EDEADLOCK) && count++<LOOP_NOPEN)
66: if(count)
67: mswait(100);
68: return(file);
69: }
1.1.1.2 ! root 70:
1.1 root 71: /****************************************************************************/
72: /* This function performs an nopen, but returns a file stream with a buffer */
73: /* allocated. */
74: /****************************************************************************/
75: FILE* fnopen(int* fd, const char* str, int access)
76: {
1.1.1.2 ! root 77: char* mode;
1.1 root 78: int file;
79: FILE * stream;
80:
81: if((file=nopen(str,access))==-1)
82: return(NULL);
83:
84: if(fd!=NULL)
85: *fd=file;
86:
87: if(access&O_APPEND) {
88: if((access&O_RDWR)==O_RDWR)
1.1.1.2 ! root 89: mode="a+";
1.1 root 90: else
1.1.1.2 ! root 91: mode="a";
1.1 root 92: } else if(access&(O_TRUNC|O_WRONLY)) {
93: if((access&O_RDWR)==O_RDWR)
1.1.1.2 ! root 94: mode="w+";
1.1 root 95: else
1.1.1.2 ! root 96: mode="w";
1.1 root 97: } else {
98: if((access&O_RDWR)==O_RDWR)
1.1.1.2 ! root 99: mode="r+";
1.1 root 100: else
1.1.1.2 ! root 101: mode="r";
1.1 root 102: }
103: stream=fdopen(file,mode);
104: if(stream==NULL) {
105: close(file);
106: return(NULL);
107: }
108: setvbuf(stream,NULL,_IOFBF,FNOPEN_BUF_SIZE);
109: return(stream);
110: }
111:
112: BOOL ftouch(const char* fname)
113: {
114: int file;
1.1.1.2 ! root 115: struct utimbuf ut;
! 116:
! 117: /* update the time stamp */
! 118: ut.actime = ut.modtime = time(NULL);
! 119: if(utime(fname, &ut)==0)
! 120: return(TRUE);
1.1 root 121:
1.1.1.2 ! root 122: /* create the file */
1.1 root 123: if((file=nopen(fname,O_WRONLY|O_CREAT))<0)
124: return(FALSE);
125: close(file);
126: return(TRUE);
127: }
128:
129: BOOL fmutex(const char* fname, const char* text, long max_age)
130: {
131: int file;
132: long t;
133: #if !defined(NO_SOCKET_SUPPORT)
134: char hostname[128];
135: if(text==NULL && gethostname(hostname,sizeof(hostname))==0)
136: text=hostname;
137: #endif
138:
139: if(max_age && (t=fdate(fname)) >= 0 && (time(NULL)-t) > max_age) {
140: if(remove(fname)!=0)
141: return(FALSE);
142: }
1.1.1.2 ! root 143: if((file=open(fname,O_CREAT|O_WRONLY|O_EXCL,DEFFILEMODE))<0)
1.1 root 144: return(FALSE);
145: if(text!=NULL)
146: write(file,text,strlen(text));
147: close(file);
148: return(TRUE);
149: }
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