getenv Crashes!

I noticed that when i use getenv to get a particular environment variable, the program crashes...

However, i wanted the environemnt variables to be optional.  So, if the env variables are not set, then use the default ones.

But when it's not defined, ...it shuts down.
jeweeAsked:
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pankajtiwaryCommented:
Hi jewee,
Please post the relevant part of the code so that we can go further.

Cheers!
0
AxterCommented:
What OS and what compiler are you using?

I had a similar problem like this using GNU compiler on SunOS.
The problem was some where else in the code, but it would currupt the memory so that it would crash when calling getenv.
0
jeweeAuthor Commented:
I call the getEnvVar method in the constructor...

bool ViewForm::getEnvVar()
{
   serverHostName = getenv("SERVER_HOSTNAME");
   if (serverHostName == NULL)
   {
        printf("Error\n");
        return false;
    }
}

I am running on a SunOS
0
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stefan73Commented:
Hi jewee,
Your code snippet looks OK. Just make sure that you don't access (dereference) serverHostName when it's NULL.

You get a core dump, right? Then you can compile your source with -g, run it until a core dump is created and then check either with Workshop or dbx:

cc -g file.c -o binary
./binary # crash!

dbx ./binary core

Cheers!

Stefan
0

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AxterCommented:
Is your constructor being called before entry into the main() function?
0
rstaveleyCommented:
serverHostName is going to point to read-only memory. You don't do anything like accidentally free/deleting it or writing to it do you?
0
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