On 10/04/19 06:49, Kurt Van Dijck wrote: >> IMHO time_t is defined in sys/types.h > > http://www.open-std.org/JTC1/SC22/WG14/www/docs/n1256.pdf > chapter 7.23.1.3 > I believe that covers userland environments, not the kernel. At least on Solaris (and its derivatives, such as Illumos), the symbols available in the kernel are defined in sys/ (or net/, netinet/, or similar for network bits). The top-level header files are for userland libraries. Userland libraries are not accessible within the kernel. In this case, the common net/ppp_defs.h file is used by both user-level code (pppd itself) and by several kernel modules. There may be systems on which including <time.h> within a kernel module is harmless (I suspect Linux is one), but I have a hard time believing that it's correct to do so. Do you know of a system where either (a) <sys/time.h> does not exist or (b) it exists but does not define 'time_t'? I haven't been able to find a system that matches either case. I tried several flavors of Linux, AIX, Solaris, HP/UX, and IBM USS on z/OS. -- James Carlson 42.703N 71.076W <carlsonj@xxxxxxxxxxxxxxx>
