Re: scripts/basic/fixdep: Complete error handling in print_cmdline()

From: Masahiro Yamada
Date: Wed Nov 02 2016 - 14:30:17 EST

2016-11-03 2:38 GMT+09:00 SF Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>:
>>>> + if (printf("cmd_%s := %s\n\n", target, cmdline) < 10) {
>>> Rather than scatter fragile magic numbers, like 10, throughout the
>>> code, if you're hell-bent on checking for printf errors you could
>>> write a little wrapper function that hid the magic number and bundled
>>> up the errno stuff.
>> BTW, how the magic number "10" was calculated?
> Does the passed format string indicate how many characters should be
> printed at least?

So, the check is a bit compromised.
The printf() should print at lease 10 characters.
If "target" or "cmdline" is not NULL, it should print more.

Best Regards
Masahiro Yamada