On 12/16/2015 02:53 PM, H.J. Lu wrote: > On Wed, Dec 16, 2015 at 5:38 AM, Michael Kerrisk (man-pages) > <mtk.manpages@xxxxxxxxx> wrote: >> On 12/15/2015 03:17 PM, H.J. Lu wrote: >>> On Tue, Dec 15, 2015 at 6:16 AM, Andreas Schwab <schwab@xxxxxxx> wrote: >>>> In which way does it conflict? >>> >>> On error, ((time_t) -1) is returned, and errno is set appropriately. >> >> >> So, how would the following text be for the man page? >> >> ERRORS >> EFAULT t points outside your accessible address space. On sys‐ >> tems where the C library time() wrapper function invokes >> an implementation provided by the vdso(7) (so that there >> is no trap into the kernel), an invalid address may >> instead trigger a SIGSEGV signal. >> > > time never sets errno. You can't tell if it returns error when time > in libc.a is used. Yes, but the raw system call can give us EFAULT. That needs to be documented. By the way, what's the reason that one can't tell if it returns an error when time() in libc.a is used? Thanks, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
