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/* ========================================================================
* Copyright 1988-2006 University of Washington
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
*
* ========================================================================
*/
/*
* Program: Unix compatibility routines
*
* Author: Mark Crispin
* Networks and Distributed Computing
* Computing & Communications
* University of Washington
* Administration Building, AG-44
* Seattle, WA 98195
* Internet: MRC@CAC.Washington.EDU
*
* Date: 14 September 1996
* Last Edited: 30 August 2006
*/
/* DEDICATION
*
* This file is dedicated to my dog, Unix, also known as Yun-chan and
* Unix J. Terwilliker Jehosophat Aloysius Monstrosity Animal Beast. Unix
* passed away at the age of 11 1/2 on September 14, 1996, 12:18 PM PDT, after
* a two-month bout with cirrhosis of the liver.
*
* He was a dear friend, and I miss him terribly.
*
* Lift a leg, Yunie. Luv ya forever!!!!
*/
/* Emulator for BSD flock() call
* Accepts: file descriptor
* operation bitmask
* Returns: 0 if successful, -1 if failure
*/
/* Our friends in Redmond have decided that you can not write to any segment
* which has a shared lock. This screws up the shared-write mailbox drivers
* (mbx, mtx, and tenex). As a workaround, we'll only lock the first byte of
* the file, meaning that you can't write that byte shared.
* This behavior seems to be new as of NT 4.0.
*/
int flock (int fd,int op)
{
HANDLE hdl = (HANDLE) _get_osfhandle (fd);
DWORD flags = (op & LOCK_NB) ? LOCKFILE_FAIL_IMMEDIATELY : 0;
OVERLAPPED offset = {NIL,NIL,0,0,NIL};
int ret = -1;
blocknotify_t bn = (blocknotify_t)
((op & LOCK_NB) ? NIL : mail_parameters (NIL,GET_BLOCKNOTIFY,NIL));
if (hdl < 0) errno = EBADF; /* error in file descriptor */
else switch (op & ~LOCK_NB) { /* translate to LockFileEx() op */
case LOCK_EX: /* exclusive */
flags |= LOCKFILE_EXCLUSIVE_LOCK;
case LOCK_SH: /* shared */
if (!check_nt ()) return 0; /* always succeeds if not NT */
if (bn) (*bn) (BLOCK_FILELOCK,NIL);
/* bug for bug compatible with Unix */
UnlockFileEx (hdl,NIL,1,0,&offset);
/* lock the file as requested */
if (LockFileEx (hdl,flags,NIL,1,0,&offset)) ret = 0;
if (bn) (*bn) (BLOCK_NONE,NIL);
/* if failed */
if (ret) errno = (op & LOCK_NB) ? EAGAIN : EBADF;
break;
case LOCK_UN: /* unlock */
if (check_nt ()) UnlockFileEx (hdl,NIL,1,0,&offset);
ret = 0; /* always succeeds */
default: /* default */
errno = EINVAL; /* bad call */
break;
}
return ret;
}
/* Local storage */
static char *loghdr; /* log file header string */
static HANDLE loghdl = NIL; /* handle of event source */
/* Emulator for BSD syslog() routine
* Accepts: priority
* message
* parameters
*/
void syslog (int priority,const char *message,...)
{
va_list args;
LPTSTR strs[2];
char tmp[MAILTMPLEN]; /* callers must be careful not to pop this */
unsigned short etype;
if (!check_nt ()) return; /* no-op on non-NT system */
/* default event source */
if (!loghdl) openlog ("c-client",LOG_PID,LOG_MAIL);
switch (priority) { /* translate UNIX type into NT type */
case LOG_ALERT:
etype = EVENTLOG_ERROR_TYPE;
break;
case LOG_INFO:
etype = EVENTLOG_INFORMATION_TYPE;
break;
default:
etype = EVENTLOG_WARNING_TYPE;
}
va_start (args,message); /* initialize vararg mechanism */
vsprintf (tmp,message,args); /* build message */
strs[0] = loghdr; /* write header */
strs[1] = tmp; /* then the message */
/* report the event */
ReportEvent (loghdl,etype,(unsigned short) priority,2000,NIL,2,0,strs,NIL);
va_end (args);
}
/* Emulator for BSD openlog() routine
* Accepts: identity
* options
* facility
*/
void openlog (const char *ident,int logopt,int facility)
{
char tmp[MAILTMPLEN];
if (!check_nt ()) return; /* no-op on non-NT system */
if (loghdl) fatal ("Duplicate openlog()!");
loghdl = RegisterEventSource (NIL,ident);
sprintf (tmp,(logopt & LOG_PID) ? "%s[%d]" : "%s",ident,getpid ());
loghdr = cpystr (tmp); /* save header for later */
}
/* Copy Unix string with CRLF newlines
* Accepts: destination string
* pointer to size of destination string buffer
* source string
* length of source string
* Returns: length of copied string
*/
unsigned long unix_crlfcpy (char **dst,unsigned long *dstl,char *src,
unsigned long srcl)
{
unsigned long i,j;
char *d = src;
/* count number of LF's in source string(s) */
for (i = srcl,j = 0; j < srcl; j++) if (*d++ == '\012') i++;
/* flush destination buffer if too small */
if (*dst && (i > *dstl)) fs_give ((void **) dst);
if (!*dst) { /* make a new buffer if needed */
*dst = (char *) fs_get ((*dstl = i) + 1);
if (dstl) *dstl = i; /* return new buffer length to main program */
}
d = *dst; /* destination string */
/* copy strings, inserting CR's before LF's */
while (srcl--) switch (*src) {
case '\015': /* unlikely carriage return */
*d++ = *src++; /* copy it and any succeeding linefeed */
if (srcl && *src == '\012') {
*d++ = *src++;
srcl--;
}
break;
case '\012': /* line feed? */
*d++ ='\015'; /* yes, prepend a CR, drop into default case */
default: /* ordinary chararacter */
*d++ = *src++; /* just copy character */
break;
}
*d = '\0'; /* tie off destination */
return d - *dst; /* return length */
}
/* Length of Unix string after unix_crlfcpy applied
* Accepts: source string
* Returns: length of string
*/
unsigned long unix_crlflen (STRING *s)
{
unsigned long pos = GETPOS (s);
unsigned long i = SIZE (s);
unsigned long j = i;
while (j--) switch (SNX (s)) {/* search for newlines */
case '\015': /* unlikely carriage return */
if (j && (CHR (s) == '\012')) {
SNX (s); /* eat the line feed */
j--;
}
break;
case '\012': /* line feed? */
i++;
default: /* ordinary chararacter */
break;
}
SETPOS (s,pos); /* restore old position */
return i;
}
/* Undoubtably, I'm going to regret these two routines in the future. I
* regret them now. Their purpose is to work around two problems in the
* VC++ 6.0 C library:
* (1) tmpfile() creates the file in the current directory instead of a
* temporary directory
* (2) tmpfile() and fclose() think that on NT systems, it works to unlink
* the file while it's still open, so there's no need for the _tmpfname
* hook at fclose(). Unfortunately, that doesn't work in Win2K.
* I would be delighted to have a better alternative.
*/
#undef fclose /* use the real fclose() in close_file() */
/* Substitute for Microsoft's tmpfile() that uses the real temporary directory
* Returns: FILE structure if success, NIL if failure
*/
FILE *create_tempfile (void)
{
FILE *ret = NIL;
char *s = _tempnam (getenv ("TEMP"),"msg");
if (s) { /* if got temporary name... */
/* open file, and stash name on _tmpfname */
if (ret = fopen (s,"w+b")) ret->_tmpfname = s;
else fs_give ((void **) &s);/* flush temporary string */
}
return ret;
}
/* Substitute for Microsoft's fclose() that always flushes _tmpfname
* Returns: FILE structure if success, NIL if failure
*/
int close_file (FILE *stream)
{
int ret;
char *s = stream->_tmpfname;
stream->_tmpfname = NIL; /* just in case fclose() tries to delete it */
ret = fclose (stream); /* close the file */
if (s) { /* was there a _tmpfname? */
unlink (s); /* yup, delete it */
fs_give ((void **) &s); /* and flush the name */
}
return ret;
}
/* Get password from console
* Accepts: prompt
* Returns: password
*/
#define PWDLEN 128 /* used by Linux */
char *getpass (const char *prompt)
{
static char pwd[PWDLEN];
int ch,i,done;
fputs (prompt,stderr); /* output prompt */
for (i = done = 0; !done; ) switch (ch = _getch()) {
case 0x03: /* CTRL/C stops program */
_exit (1);
case '\b': /* BACKSPACE erase previous character */
if (i) pwd[--i] = '\0';
break;
case '\n': case '\r': /* CR or LF terminates string */
done = 1;
break;
default: /* any other character is a pwd char */
if (i < (PWDLEN - 1)) pwd[i++] = ch;
break;
}
pwd[i] = '\0'; /* tie off string with null */
putchar ('\n'); /* echo newline */
return pwd;
}
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