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https://sourceware.org/git/glibc.git
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linux: Add pidfd_open
This was added on Linux 5.3 (32fcb426ec001cb6d5a4a195091a8486ea77e2df) as a way to retrieve a pid file descriptors for process that has not been created CLONE_PIDFD (by usual fork/clone). Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
parent
1da064c015
commit
97f5d19c45
4
NEWS
4
NEWS
@ -16,6 +16,10 @@ Major new features:
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-z pack-relative-relocs option, which is supported for some targets
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in recent binutils versions. Lazy binding doesn't apply to DT_RELR.
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* On Linux, the pidfd_open function has been added. The pidfd functionality
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provides access to a process while avoiding the issue of PID reuse on
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tranditional Unix systems.
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Deprecated and removed features, and other changes affecting compatibility:
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* Support for prelink will be removed in the next release; this includes
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@ -113,7 +113,8 @@ sysdep_headers += sys/mount.h sys/acct.h \
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bits/types/struct_shmid64_ds.h \
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bits/types/struct_shmid64_ds_helper.h \
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bits/pthread_stack_min.h bits/pthread_stack_min-dynamic.h \
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sys/rseq.h bits/rseq.h
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sys/rseq.h bits/rseq.h \
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sys/pidfd.h
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tests += tst-clone tst-clone2 tst-clone3 tst-fanotify tst-personality \
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tst-quota tst-sync_file_range tst-sysconf-iov_max tst-ttyname \
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@ -240,6 +241,14 @@ $(objpfx)tst-mman-consts.out: ../sysdeps/unix/sysv/linux/tst-mman-consts.py
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< /dev/null > $@ 2>&1; $(evaluate-test)
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$(objpfx)tst-mman-consts.out: $(sysdeps-linux-python-deps)
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tests-special += $(objpfx)tst-pidfd-consts.out
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$(objpfx)tst-pidfd-consts.out: ../sysdeps/unix/sysv/linux/tst-pidfd-consts.py
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$(sysdeps-linux-python) \
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../sysdeps/unix/sysv/linux/tst-pidfd-consts.py \
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$(sysdeps-linux-python-cc) \
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< /dev/null > $@ 2>&1; $(evaluate-test)
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$(objpfx)tst-pidfd-consts.out: $(sysdeps-linux-python-deps)
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tst-rseq-disable-ENV = GLIBC_TUNABLES=glibc.pthread.rseq=0
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endif # $(subdir) == misc
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@ -299,6 +299,9 @@ libc {
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%endif
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epoll_pwait2;
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}
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GLIBC_2.36 {
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pidfd_open;
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}
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GLIBC_PRIVATE {
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# functions used in other libraries
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__syscall_rt_sigqueueinfo;
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@ -2616,3 +2616,4 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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@ -2713,6 +2713,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 _IO_fprintf F
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GLIBC_2.4 _IO_printf F
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GLIBC_2.4 _IO_sprintf F
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@ -2377,3 +2377,4 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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@ -496,6 +496,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 _Exit F
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GLIBC_2.4 _IO_2_1_stderr_ D 0xa0
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GLIBC_2.4 _IO_2_1_stdin_ D 0xa0
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@ -493,6 +493,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 _Exit F
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GLIBC_2.4 _IO_2_1_stderr_ D 0xa0
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GLIBC_2.4 _IO_2_1_stdin_ D 0xa0
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@ -2652,3 +2652,4 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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@ -2601,6 +2601,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 __confstr_chk F
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GLIBC_2.4 __fgets_chk F
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GLIBC_2.4 __fgets_unlocked_chk F
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@ -2785,6 +2785,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 __confstr_chk F
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GLIBC_2.4 __fgets_chk F
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GLIBC_2.4 __fgets_unlocked_chk F
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@ -2551,6 +2551,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 __confstr_chk F
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GLIBC_2.4 __fgets_chk F
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GLIBC_2.4 __fgets_unlocked_chk F
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@ -497,6 +497,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 _Exit F
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GLIBC_2.4 _IO_2_1_stderr_ D 0x98
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GLIBC_2.4 _IO_2_1_stdin_ D 0x98
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@ -2728,6 +2728,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 __confstr_chk F
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GLIBC_2.4 __fgets_chk F
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GLIBC_2.4 __fgets_unlocked_chk F
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@ -2701,3 +2701,4 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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@ -2698,3 +2698,4 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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@ -2693,6 +2693,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 __confstr_chk F
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GLIBC_2.4 __fgets_chk F
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GLIBC_2.4 __fgets_unlocked_chk F
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@ -2691,6 +2691,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 __confstr_chk F
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GLIBC_2.4 __fgets_chk F
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GLIBC_2.4 __fgets_unlocked_chk F
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@ -2699,6 +2699,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 __confstr_chk F
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GLIBC_2.4 __fgets_chk F
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GLIBC_2.4 __fgets_unlocked_chk F
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@ -2602,6 +2602,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 __confstr_chk F
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GLIBC_2.4 __fgets_chk F
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GLIBC_2.4 __fgets_unlocked_chk F
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@ -2740,3 +2740,4 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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@ -2123,3 +2123,4 @@ GLIBC_2.35 wprintf F
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GLIBC_2.35 write F
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GLIBC_2.35 writev F
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GLIBC_2.35 wscanf F
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GLIBC_2.36 pidfd_open F
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@ -2755,6 +2755,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 _IO_fprintf F
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GLIBC_2.4 _IO_printf F
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GLIBC_2.4 _IO_sprintf F
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@ -2788,6 +2788,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 _IO_fprintf F
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GLIBC_2.4 _IO_printf F
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GLIBC_2.4 _IO_sprintf F
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@ -2510,6 +2510,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 _IO_fprintf F
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GLIBC_2.4 _IO_printf F
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GLIBC_2.4 _IO_sprintf F
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@ -2812,3 +2812,4 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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@ -2379,3 +2379,4 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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@ -2579,3 +2579,4 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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@ -2753,6 +2753,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 _IO_fprintf F
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GLIBC_2.4 _IO_printf F
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GLIBC_2.4 _IO_sprintf F
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@ -2547,6 +2547,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 _IO_fprintf F
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GLIBC_2.4 _IO_printf F
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GLIBC_2.4 _IO_sprintf F
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@ -2608,6 +2608,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 __confstr_chk F
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GLIBC_2.4 __fgets_chk F
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GLIBC_2.4 __fgets_unlocked_chk F
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@ -2605,6 +2605,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 __confstr_chk F
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GLIBC_2.4 __fgets_chk F
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GLIBC_2.4 __fgets_unlocked_chk F
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@ -2748,6 +2748,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 _IO_fprintf F
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GLIBC_2.4 _IO_printf F
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GLIBC_2.4 _IO_sprintf F
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@ -2574,6 +2574,7 @@ GLIBC_2.35 __memcmpeq F
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GLIBC_2.35 _dl_find_object F
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GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.4 __confstr_chk F
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GLIBC_2.4 __fgets_chk F
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GLIBC_2.4 __fgets_unlocked_chk F
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33
sysdeps/unix/sysv/linux/sys/pidfd.h
Normal file
33
sysdeps/unix/sysv/linux/sys/pidfd.h
Normal file
@ -0,0 +1,33 @@
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/* Wrapper for file descriptors that refers to a process functions.
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Copyright (C) 2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _PIDFD_H
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#include <fcntl.h>
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#include <bits/types/siginfo_t.h>
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#define PIDFD_NONBLOCK O_NONBLOCK
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/* Returns a file descriptor that refers to the process PID. The
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close-on-exec is set on the file descriptor.
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The FLAGS argument is reserved for future use, it must be specified
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as 0. */
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extern int pidfd_open (__pid_t __pid, unsigned int __flags) __THROW;
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#endif /* _PIDFD_H */
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@ -39,6 +39,7 @@ munlock - munlock i:aU munlock
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munlockall - munlockall i: munlockall
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nfsservctl EXTRA nfsservctl i:ipp __compat_nfsservctl nfsservctl@GLIBC_2.0:GLIBC_2.28
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pipe2 - pipe2 i:fi __pipe2 pipe2
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pidfd_open EXTRA pidfd_open i:iU pidfd_open
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pivot_root EXTRA pivot_root i:ss pivot_root
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query_module EXTRA query_module i:sipip __compat_query_module query_module@GLIBC_2.0:GLIBC_2.23
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quotactl EXTRA quotactl i:isip quotactl
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49
sysdeps/unix/sysv/linux/tst-pidfd-consts.py
Normal file
49
sysdeps/unix/sysv/linux/tst-pidfd-consts.py
Normal file
@ -0,0 +1,49 @@
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#!/usr/bin/python3
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# Test that glibc's sys/pidfd.h constants match the kernel's.
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# Copyright (C) 2022 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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#
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# The GNU C Library is free software; you can redistribute it and/or
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||||
# modify it under the terms of the GNU Lesser General Public
|
||||
# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
# Lesser General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU Lesser General Public
|
||||
# License along with the GNU C Library; if not, see
|
||||
# <https://www.gnu.org/licenses/>.
|
||||
|
||||
import argparse
|
||||
import sys
|
||||
|
||||
import glibcextract
|
||||
import glibcsyscalls
|
||||
|
||||
|
||||
def main():
|
||||
"""The main entry point."""
|
||||
parser = argparse.ArgumentParser(
|
||||
description="Test that glibc's sys/pidfd.h constants "
|
||||
"match the kernel's.")
|
||||
parser.add_argument('--cc', metavar='CC',
|
||||
help='C compiler (including options) to use')
|
||||
args = parser.parse_args()
|
||||
|
||||
linux_version_headers = glibcsyscalls.linux_kernel_version(args.cc)
|
||||
linux_version_glibc = (5, 16)
|
||||
sys.exit(glibcextract.compare_macro_consts(
|
||||
'#include <sys/pidfd.h>\n',
|
||||
'#include <asm/fcntl.h>\n'
|
||||
'#include <linux/pidfd.h>\n',
|
||||
args.cc,
|
||||
'PIDFD_.*',
|
||||
None,
|
||||
linux_version_glibc > linux_version_headers,
|
||||
linux_version_headers > linux_version_glibc))
|
||||
|
||||
if __name__ == '__main__':
|
||||
main()
|
@ -2525,6 +2525,7 @@ GLIBC_2.35 __memcmpeq F
|
||||
GLIBC_2.35 _dl_find_object F
|
||||
GLIBC_2.35 epoll_pwait2 F
|
||||
GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
|
||||
GLIBC_2.36 pidfd_open F
|
||||
GLIBC_2.4 __confstr_chk F
|
||||
GLIBC_2.4 __fgets_chk F
|
||||
GLIBC_2.4 __fgets_unlocked_chk F
|
||||
|
@ -2631,3 +2631,4 @@ GLIBC_2.35 __memcmpeq F
|
||||
GLIBC_2.35 _dl_find_object F
|
||||
GLIBC_2.35 epoll_pwait2 F
|
||||
GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
|
||||
GLIBC_2.36 pidfd_open F
|
||||
|
Loading…
Reference in New Issue
Block a user