char **environ

Below is the general syntax for environ. Is char **environ a pointor to a pointor?? I am sure it means something else... please explain..

Code:

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#include <stdlib.h>
extern char **environ;

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Nope, that's exactly what it is. A pointer to a pointer to a char.
Although it is interpreted as a pointer to an array of pointers, each of which points to a C-style string.

Yes it is.

Use it like you would the char **argv that main() receives.

Quote:

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Originally Posted by jas_atwal

Below is the general syntax for environ. Is char **environ a pointor to a pointor?? I am sure it means something else... please explain..

Code:

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#include <stdlib.h>
extern char **environ;

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It is a pointer to an array of char pointers. In other words, an array of strings where environ[0] is the first, environ[1] is the second, etc. It is exactly like argv but lists the environment variables instead of the command line arguments.

I would suggest against accessing it directly. You should go through getenv() instead.

Thank you all for your replies!! I really appreciate