Handling argc==0 in the kernel
Handling argc==0 in the kernel
Posted Jan 31, 2022 9:58 UTC (Mon) by larkey (guest, #104463)In reply to: Handling argc==0 in the kernel by anton
Parent article: Handling argc==0 in the kernel
> The argument argv is an array of character pointers to null-terminated strings. The application shall ensure that the last member of this array is a null pointer.
There is nothing in POSIX saying "it may be an array, but it also may be NULL". If a pointer may be NULL in any C function, this is explicitly noted. Compare the standard on strtol(3):
> A pointer to the final string shall be stored in the object pointed to by endptr, provided that endptr is not a null pointer.
(https://pubs.opengroup.org/onlinepubs/9699919799/function...).
This is making it explicit that endptr may be NULL. The nptr argument, however, may not be NULL i.e.,
strtol(NULL, NULL, 10);
is *not* allowed. In the same vain, you can't just make argv be NULL.
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