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cgetcwd

In what circumstances does getcwd() return NULL?

char cwd[256];
if (getcwd(cwd, sizeof(cwd)) == NULL) {
    return -1;
}

First comes to mind that getcwd() could return NULL, when cwd is not large enough. Is there any other cases?

Solution

  • Its documentation states:

    ERRORS

    The getcwd() function shall fail if:

    [EINVAL]
        The size argument is 0.
    [ERANGE]
        The size argument is greater than 0, but is smaller than the length of the pathname +1.

    The getcwd() function may fail if:

    [EACCES]
        Read or search permission was denied for a component of the pathname.
    [ENOMEM]
        Insufficient storage space is available.