glibc/io/sys/stat.h, branch vdso

Always define __USE_TIME_BITS64 when 64 bit time_t is used

2024-04-02T18:28:36Z

It was raised on libc-help [1] that some Linux kernel interfaces expect the libc to define __USE_TIME_BITS64 to indicate the time_t size for the kABI. Different than defined by the initial y2038 design document [2], the __USE_TIME_BITS64 is only defined for ABIs that support more than one time_t size (by defining the _TIME_BITS for each module). The 64 bit time_t redirects are now enabled using a different internal define (__USE_TIME64_REDIRECTS). There is no expected change in semantic or code generation. Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, and arm-linux-gnueabi [1] https://sourceware.org/pipermail/libc-help/2024-January/006557.html [2] https://sourceware.org/glibc/wiki/Y2038ProofnessDesign Reviewed-by: DJ Delorie

Update copyright dates with scripts/update-copyrights

2024-01-01T18:53:40Z

y2038: Fix support for 64-bit time on legacy ABIs

2023-11-15T13:15:12Z

This fixes a typo. Reviewed-by: Adhemerval Zanella

Update copyright dates with scripts/update-copyrights

2023-01-06T21:14:39Z

Update copyright dates with scripts/update-copyrights

2022-01-01T19:40:24Z

I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines

y2038: Add support for 64-bit time on legacy ABIs

2021-06-15T13:42:11Z

A new build flag, _TIME_BITS, enables the usage of the newer 64-bit time symbols for legacy ABI (where 32-bit time_t is default). The 64 bit time support is only enabled if LFS (_FILE_OFFSET_BITS=64) is also used. Different than LFS support, the y2038 symbols are added only for the required ABIs (armhf, csky, hppa, i386, m68k, microblaze, mips32, mips64-n32, nios2, powerpc32, sparc32, s390-32, and sh). The ABIs with 64-bit time support are unchanged, both for symbol and types redirection. On Linux the full 64-bit time support requires a minimum of kernel version v5.1. Otherwise, the 32-bit fallbacks are used and might results in error with overflow return code (EOVERFLOW). The i686-gnu does not yet support 64-bit time. This patch exports following rediretions to support 64-bit time: * libc: adjtime adjtimex clock_adjtime clock_getres clock_gettime clock_nanosleep clock_settime cnd_timedwait ctime ctime_r difftime fstat fstatat futimens futimes futimesat getitimer getrusage gettimeofday gmtime gmtime_r localtime localtime_r lstat_time lutimes mktime msgctl mtx_timedlock nanosleep nanosleep ntp_gettime ntp_gettimex ppoll pselec pselect pthread_clockjoin_np pthread_cond_clockwait pthread_cond_timedwait pthread_mutex_clocklock pthread_mutex_timedlock pthread_rwlock_clockrdlock pthread_rwlock_clockwrlock pthread_rwlock_timedrdlock pthread_rwlock_timedwrlock pthread_timedjoin_np recvmmsg sched_rr_get_interval select sem_clockwait semctl semtimedop sem_timedwait setitimer settimeofday shmctl sigtimedwait stat thrd_sleep time timegm timerfd_gettime timerfd_settime timespec_get utime utimensat utimes utimes wait3 wait4 * librt: aio_suspend mq_timedreceive mq_timedsend timer_gettime timer_settime * libanl: gai_suspend Reviewed-by: Lukasz Majewski Reviewed-by: Carlos O'Donell Tested-by: Carlos O'Donell

Update copyright dates with scripts/update-copyrights

2021-01-02T20:17:34Z

I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master

Remove mknod wrapper functions, move them to symbols

2020-10-09T20:02:06Z

This patch removes the mknod and mknodat static wrapper and add the symbols on the libc with the expected names. Both the prototypes of the internal symbol linked by the static wrappers and the inline redirectors are also removed from the installed sys/stat.h header file. The wrapper implementation license LGPL exception is also removed since it is no longer statically linked to binaries. Internally the _STAT_VER* definitions are moved to the arch-specific xstatver.h file. Checked with a build for all affected ABIs. I also checked on x86_64, i686, powerpc, powerpc64le, sparcv9, sparc64, s390, and s390x. Reviewed-by: Lukasz Majewski

Remove stat wrapper functions, move them to exported symbols

2020-10-09T20:02:06Z

This patch removes the stat, stat64, lstat, lstat64, fstat, fstat64, fstatat, and fstatat64 static wrapper and add the symbol on the libc with the expected names. Both the prototypes of the internal symbol linked by the static wrappers and the inline redirectors are also removed from the installed sys/stat.h header file. The wrapper implementation license LGPL exception is also removed since it is no longer statically linked to binaries. Internally the _STAT_VER* definitions are moved to a arch-specific xstatver.h file. The internal defines that redirects internals {f}stat{at} to their {f}xstat{at} counterparts are removed for Linux (!NO_RTLD_HIDDEN). Hurd still requires them since {f}stat{at} pulls extra objects that makes the loader build fail otherwise (I haven't dig into why exactly). Checked with a build for all affected ABIs. I also checked on x86_64, i686, powerpc, powerpc64le, sparcv9, sparc64, s390, and s390x. Reviewed-by: Lukasz Majewski

Fix namespace violation in stdio.h and sys/stat.h if build with optimization. [BZ #26376]

2020-08-20T08:45:26Z

If build with optimization, stdio.h and sys/stat.h are defining some inlining functions. This leads to test fails if glibc is build with the following commands. (Note that the conformtests usually builds without optimization or other CFLAGS): /configure CC="gcc -O3" --prefix=/usr make make subdirs=conform check - FAIL: conform/XPG4/stdio.h/conform - FAIL: conform/XPG42/stdio.h/conform out-files: ... PASSCOMBINED: Availability of variable optopt PASSCOMBINED: Type of variable optopt Namespace violation: "getc_unlocked" Namespace violation: "getchar_unlocked" Namespace violation: "putc_unlocked" Namespace violation: "putchar_unlocked" FAIL: Namespace of ---------------------------------------------------------------------------- Total number of tests : 168 Number of failed tests : 1 Number of xfailed tests : 0 Number of skipped tests : 0 - FAIL: conform/POSIX2008/sys/stat.h/conform out-file: ... PASSCOMBINED: Availability of function utimensat PASSCOMBINED: Type of function utimensat Namespace violation: "mknodat" FAIL: Namespace of ---------------------------------------------------------------------------- Total number of tests : 97 Number of failed tests : 1 Number of xfailed tests : 0 Number of skipped tests : 0 For getc_unlocked, getchar_unlocked, putc_unlocked, putchar_unlocked in stdio.h, those are defined "# ifdef __USE_POSIX" instead of "#ifdef __USE_POSIX199506" for the non-inlining declaration. See also "Bug 20014 - stdio.h namespace for pre-threads POSIX" (https://sourceware.org/bugzilla/show_bug.cgi?id=20014). For mknodat in sys/stat.h, those are defined "# ifdef __USE_ATFILE" instead of the additional guard "# if defined __USE_MISC || defined __USE_XOPEN_EXTENDED".