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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-01-27 16:45:18 -0300 |
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| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-01-28 18:18:27 -0300 |
| commit | 948ce73b31fdb0860bcec4b8e62b14e88234f98a (patch) | |
| tree | 587bed4b009d25b2304f75ba738b4a3235ad7e8e /sysdeps/unix/sysv/linux/openat64.c | |
| parent | 8fba672472ae0055387e9315fc2eddfa6775ca79 (diff) | |
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Linux: Only generate 64 bit timestamps for 64 bit time_t recvmsg/recvmmsg
The timestamps created by __convert_scm_timestamps only make sense for
64 bit time_t programs, 32 bit time_t programs will ignore 64 bit time_t
timestamps since SO_TIMESTAMP will be defined to old values (either by
glibc or kernel headers).
Worse, if the buffer is not suffice MSG_CTRUNC is set to indicate it
(which breaks some programs [1]).
This patch makes only 64 bit time_t recvmsg and recvmmsg to call
__convert_scm_timestamps. Also, the assumption to called it is changed
from __ASSUME_TIME64_SYSCALLS to __TIMESIZE != 64 since the setsockopt
might be called by libraries built without __TIME_BITS=64. The
MSG_CTRUNC is only set for the 64 bit symbols, it should happen only
if 64 bit time_t programs run older kernels.
Checked on x86_64-linux-gnu and i686-linux-gnu.
[1] https://github.com/systemd/systemd/pull/20567
Reviewed-by: Florian Weimer <fweimer@redhat.com>
Diffstat (limited to 'sysdeps/unix/sysv/linux/openat64.c')
0 files changed, 0 insertions, 0 deletions