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get/setsockopt: add fallback for new time64 SO_RCVTIMEO/SO_SNDTIMEO

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without this, the SO_RCVTIMEO and SO_SNDTIMEO socket options would
stop working on pre-5.1 kernels after time_t is switched to 64-bit and
their values are changed to the new time64 versions.

new code is written such that it's statically unreachable on 64-bit
archs, and on existing 32-bit archs until the macro values are changed
to activate 64-bit time_t.
This commit is contained in:
Rich Felker
2019-07-31 20:20:57 -04:00
parent 59324c8b09
commit 51fd67fcbf
8 changed files with 79 additions and 2 deletions
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src/internal/syscall.h
+7
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@@ -299,6 +299,13 @@ hidden long __syscall_ret(unsigned long),
#define __SC_recvmmsg 19
#define __SC_sendmmsg 20
#ifndef SO_RCVTIMEO_OLD
#define SO_RCVTIMEO_OLD 20
#endif
#ifndef SO_SNDTIMEO_OLD
#define SO_SNDTIMEO_OLD 21
#endif
#ifdef SYS_open
#define __sys_open2(x,pn,fl) __syscall2(SYS_open, pn, (fl)|O_LARGEFILE)
#define __sys_open3(x,pn,fl,mo) __syscall3(SYS_open, pn, (fl)|O_LARGEFILE, mo)