netcdf-c/ncgen/generr.c
Dennis Heimbigner 6901206927 Regularize the semantics of mkstemp.
re: https://github.com/Unidata/netcdf-c/issues/1827

The issue is partly resolved by this PR. The proximate problem appears to be that the semantics of mkstemp in **nix is different than the semantics of _mktemp_s in Windows. I had thought they were the same but that is incorrect. The _mktemp_s function will only produce 26 different files and so the netcdf temp file code will fail after about that many iterations.

So, to solve this, I created my own version of mkstemp for windows that uses a random number generator. This appears to solve the reported issue.  I also added the testcase ncdap_test/test_manyurls but made it conditional on --enable-dap-long-tests because it is very slow.

I did note that the provided test program now fails after some 800 iterations with a libcurl error claiming it cannot resolve the host name. My belief is that the library is just running out of resources at this point: too many open curl handles or some such. I doubt if this failure is fixable.

So bottom line is that it is really important to do nc_close when you are finished with a file.

Misc. Other Changes:

1. I took the opportunity to clean up some bad string hacks in the code. Specifically
    * change all uses of strncat to strlcat
    * remove old string hacks: occoncat and occopycat
2. Add heck to see if test.opendap.org is running and if not, then skip test
3. Make CYGWIN use TEMP environment variable
2021-05-14 11:33:03 -06:00

126 lines
2.6 KiB
C

/*********************************************************************
* Copyright 2018, UCAR/Unidata
* See netcdf/COPYRIGHT file for copying and redistribution conditions.
* $Header: /upc/share/CVS/netcdf-3/ncgen/generr.c,v 1.1 2009/09/25 18:22:22 dmh Exp $
*********************************************************************/
#include "includes.h"
#include <ctype.h> /* for isprint() */
#ifndef vsnprintf
extern int vsnprintf(char*, size_t, const char*, va_list ap);
#endif
int error_count;
/*
* For logging error conditions.
* Designed to be called by other vararg procedures
*/
void
vderror(const char *fmt, va_list argv)
{
(void) vdwarn(fmt,argv);
error_count++;
}
/*
* For logging error conditions.
* Designed to be called by other vararg procedures
*/
void
vdwarn(const char *fmt, va_list argv)
{
(void) vfprintf(stderr,fmt,argv) ;
(void) fputc('\n',stderr) ;
(void) fflush(stderr); /* to ensure log files are current */
}
void
derror(const char *fmt, ...)
{
va_list argv;
va_start(argv,fmt);
vderror(fmt,argv);
}
/* Report version errors */
void
verror(const char *fmt, ...)
{
char newfmt[2048];
va_list argv;
va_start(argv,fmt);
strncpy(newfmt,"netCDF classic: not supported: ",sizeof(newfmt));
strlcat(newfmt,fmt,sizeof(newfmt));
vderror(newfmt,argv);
va_end(argv);
}
void
semwarn(const int lno, const char *fmt, ...)
{
va_list argv;
va_start(argv,fmt);
(void)fprintf(stderr,"%s: %s line %d: ", progname, cdlname, lno);
vdwarn(fmt,argv);
}
void
semerror(const int lno, const char *fmt, ...)
{
va_list argv;
va_start(argv,fmt);
(void)fprintf(stderr,"%s: %s line %d: ", progname, cdlname, lno);
vderror(fmt,argv);
finalize_netcdf(1); /* immediately fatal */
}
/* Capture potential version errors */
static char* markcdf4_msg = NULL;
void
markcdf4(const char* msg)
{
enhanced_flag = 1;
if(markcdf4_msg == NULL)
markcdf4_msg = (char*)msg;
}
char*
getmarkcdf4(void)
{
return markcdf4_msg;
}
/* Capture potential version errors */
static char* markcdf5_msg = NULL;
void
markcdf5(const char* msg)
{
cdf5_flag = 1;
if(markcdf5_msg == NULL)
markcdf5_msg = (char*)msg;
}
char*
getmarkcdf5(void)
{
return markcdf5_msg;
}
/**************************************************/
/* Provide a version of snprintf that panics if*/
/* the buffer is overrun*/
void
nprintf(char* buffer, size_t size, const char *fmt, ...)
{
long written;
va_list args;
va_start(args,fmt);
written = vsnprintf(buffer,size,fmt,args);
if(written < 0 || written >= size) {
PANIC("snprintf failure");
}
}