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author | Joseph Myers <joseph@codesourcery.com> | 2017-09-08 16:19:21 +0000 |
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committer | Joseph Myers <joseph@codesourcery.com> | 2017-09-08 16:19:21 +0000 |
commit | 27342d1783449fe837ac42e9b382b2868af3256f (patch) | |
tree | d87f8022a982ca350f3873dca880b70cd456cc55 /sysdeps/generic/localplt.data | |
parent | 07b4f49db285f39594859c58893e3404b33200dd (diff) | |
download | glibc-27342d1783449fe837ac42e9b382b2868af3256f.tar.gz glibc-27342d1783449fe837ac42e9b382b2868af3256f.tar.xz glibc-27342d1783449fe837ac42e9b382b2868af3256f.zip |
Add fcntl sealing interfaces from Linux 3.17 to bits/fcntl-linux.h.
While reviewing Linux 4.13 for glibc header changes needed, I noticed that bits/fcntl-linux.h was missing F_ADD_SEALS etc. from Linux 3.17. I didn't find any discussion indicating this omission is deliberate. Now, these interfaces can only be used with file descriptors created with memfd_create, and we don't have a memfd_create wrapper in glibc (a patch was submitted in October 2014, albeit without documentation / tests, and discussions continued over the next few months, but without consensus on whether to add the interface - and we still lack any general consensus on syscall wrappers), but I don't think that's a reason to exclude the constants from bits/fcntl-linux.h (especially as the header does not look compatible with simultaneously including linux/fcntl.h). (Some of those 2014/2015 discussions raised concerns about difficulty using the memfd_create / sealing interface, but those seem to me more like a question of whether it should be part of the OS-independent GNU API - in my view, even fairly specialized syscalls ought to have wrappers added to glibc if not obsolescent, but there may be cases where we only want to include them in the Linux-specific API and anything in the OS-independent GNU API should be different - rather than being relevant to whether constants for use with fcntl should appear in headers.) * sysdeps/unix/sysv/linux/bits/fcntl-linux.h [__USE_GNU] (F_ADD_SEALS): New macro. [__USE_GNU] (F_GET_SEALS): Likewise. [__USE_GNU] (F_SEAL_SEAL): Likewise. [__USE_GNU] (F_SEAL_SHRINK): Likewise. [__USE_GNU] (F_SEAL_GROW): Likewise. [__USE_GNU] (F_SEAL_WRITE): Likewise.
Diffstat (limited to 'sysdeps/generic/localplt.data')
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