[SOURCE]
void WriteOutput(int iNumber) {
FILE *pFinal;
writeLogMessage("Starting to write the output.");
if(g_pData) {
writeLogMessage("g_pData is not NULL.");
char szName[512];
sprintf(szName, "../Outputs/Output%d.html", iNumber);
writeLogMessage("Sprintf'd");
pFinal = fopen(szName, "w");
writeLogMessage("File is attempted to have been opened.");
if(pFinal==NULL) {
writeLogMessage("File could not be opened.");
rawErrorMessage("Could not open the output file.");
return;
}
writeLogMessage("Opened the file for writing the output.");
//printf("Content-type: multipart/x-mixed-replace;boundary=PageBorder\n\n"); //printf("%s%c%c\n","Content-Type: multipart/mixed;boundary=PageBorder;charset=iso-8859-1", 13, 10);
//printf("--PageBorder\n");
//printf("Content-Type: text/html\n\n");
fprintf(pFinal, "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">\n<HTML>\n<HEAD>\n");
if(g_pJavaScript) {
fprintf(pFinal, "<SCRIPT type=\"text/javascript\">\n");
fprintf(pFinal, "%s", g_pJavaScript);
fprintf(pFinal, "</SCRIPT>\n");
writeLogMessage("Wrote the javascript code to the output file.");
}
fprintf(pFinal, "<TITLE>Isolation by Distance Web Service Results</TITLE>\n</HEAD>\n<BODY bgColor=\"white\" link=\"red\" vlink=\"blue\" alink=\"blue\">\n<FONT face=\"Verdana, Arial, Helvetica, sans-serif\" color=\"black\">\n");
fprintf(pFinal, "<P><CENTER><FONT size=\"+6\">\nIBDWS Results\n</FONT></CENTER></P>\n<P><CENTER><FONT size=\"5\">2.0 Beta</FONT></CENTER></P>\n");
fprintf(pFinal, "%s\n", g_pData);
fprintf(pFinal, "</FONT>\n</BODY>\n</HTML>");
writeLogMessage("Wrote all of the data to the output file.");
//printf("\n--PageBorder--\n");
fclose(pFinal);
}
}
void writeLogMessage(const char *szMessage, ...) {
char szBuffer[512];
va_list ap;
if(szMessage==NULL) {
return;
}
memset(szBuffer, '\0', 512);
va_start(ap, szMessage);
vsnprintf(szBuffer, 511, szMessage, ap);
va_end(ap);
fprintf(logFile, szBuffer);
fprintf(logFile, "\n");
fflush(logFile);
}
[/SOURCE]Problem With fopen() in Ubuntu
March 15, 2005 11:20 AM
I wrote a function which is intended to dump html data from memory to a file on a server. I am now porting the code and it works fine on Fedora Core 2 but in Ubuntu linux it freezes inbetween writeLogMessage("Sprintf'd"); and writeLogMessage("File is attempted to have been opened."); This is disturbing because it is freezing up on an fopen() call and it does create the file (I checked). What is going on? How do I get it to return? I have never encountered anything like this.
If it matters, writeLogMessage outputs the string to a file by opening it, writing it, and closing the file. I really don't know what to do and my deadline is tomorrow. Any help would be GREATLY appreciated. Thanks in advance.
[/source]
OpenGL Revolutions http://students.hightechhigh.org/~jjensen/
1,692
March 15, 2005 02:20 PM
I think that your isolation of the Linux distribution as the factor which affects it is a red herring (Tux likes herrings, but not red ones).
I rather suspect that the reason behind it is either:
- Filesystem
- Locality of filesystem
- Something else
I'd ask about
- You say it's "freezing". This is very imprecise. How long is it freezing for? Is it locking up indefinitely? Can you ctrl-c it to get out?
- Are the two machines running the same hardware, filesystem, filesystem locality (if it's a networked filesystem, what networked filesystem is it, and are they on the same server?)
If you can isolate a single one of these parameters, it would be more helpful.
If it's a networked filesystem, you should probably approach your systems administrator and ask why it's behaving like that. Perhaps the file server is overloaded or the network is congested.
GNU/Linux as an operating system relies on the main components
- Linux
- Gnu LIBC
Neither of these are likely to be different between the two machines just because they're running different distros. So it's either down to hardware or configuration, I suspect.
Mark
I rather suspect that the reason behind it is either:
- Filesystem
- Locality of filesystem
- Something else
I'd ask about
- You say it's "freezing". This is very imprecise. How long is it freezing for? Is it locking up indefinitely? Can you ctrl-c it to get out?
- Are the two machines running the same hardware, filesystem, filesystem locality (if it's a networked filesystem, what networked filesystem is it, and are they on the same server?)
If you can isolate a single one of these parameters, it would be more helpful.
If it's a networked filesystem, you should probably approach your systems administrator and ask why it's behaving like that. Perhaps the file server is overloaded or the network is congested.
GNU/Linux as an operating system relies on the main components
- Linux
- Gnu LIBC
Neither of these are likely to be different between the two machines just because they're running different distros. So it's either down to hardware or configuration, I suspect.
Mark
This topic is closed to new replies.
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