How big is the argv[] array?

[Norman Diamond]

In article <660020 at hpclscu.HP.COM>, shankar at hpclscu.HP.COM (Shankar Unni) writes:
>   argv = (char **) realloc (argv, newsize * sizeof (char *))
>      /* newsize is the size of your expanded argv array */

What does realloc do when its first argument is a pointer to storage
that was not obtained by malloc?  Maybe you won't crash until your
program exits and the shell reads the next command line?
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