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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2021-03-10 12:26:31 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2021-07-08 14:08:13 -0300 |
| commit | 286286283e9bdc7ef894306e2dbcf4c115b97ba2 (patch) | |
| tree | 00fa61df0e6e6093c337bc59a6c5fdd914d9fe6f /sysdeps/unix/sysv | |
| parent | ae8c243d2473bdfc3c0f9c6b46e6dffb5a28725c (diff) | |
| download | glibc-286286283e9bdc7ef894306e2dbcf4c115b97ba2.tar.gz glibc-286286283e9bdc7ef894306e2dbcf4c115b97ba2.tar.xz glibc-286286283e9bdc7ef894306e2dbcf4c115b97ba2.zip | |
linux: Add close_range
It was added on Linux 5.9 (278a5fbaed89) with CLOSE_RANGE_CLOEXEC added on 5.11 (582f1fb6b721f). Although FreeBSD has added the same syscall, this only adds the symbol on Linux ports. This syscall is required to provided a fail-safe way to implement the closefrom symbol (BZ #10353). Checked on x86_64-linux-gnu and i686-linux-gnu on kernel 5.11 and 4.15.
Diffstat (limited to 'sysdeps/unix/sysv')
37 files changed, 362 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile index faea02bd1b..e308711168 100644 --- a/sysdeps/unix/sysv/linux/Makefile +++ b/sysdeps/unix/sysv/linux/Makefile @@ -116,7 +116,8 @@ tests += tst-clone tst-clone2 tst-clone3 tst-fanotify tst-personality \ tst-tgkill tst-sysvsem-linux tst-sysvmsg-linux tst-sysvshm-linux \ tst-timerfd tst-ppoll \ tst-clock_adjtime tst-adjtimex tst-ntp_adjtime tst-ntp_gettime \ - tst-ntp_gettimex tst-sigtimedwait tst-misalign-clone + tst-ntp_gettimex tst-sigtimedwait tst-misalign-clone \ + tst-close_range # Test for the symbol version of fcntl that was replaced in glibc 2.28. ifeq ($(have-GLIBC_2.27)$(build-shared),yesyes) diff --git a/sysdeps/unix/sysv/linux/Versions b/sysdeps/unix/sysv/linux/Versions index 53cb7b23e2..4884216825 100644 --- a/sysdeps/unix/sysv/linux/Versions +++ b/sysdeps/unix/sysv/linux/Versions @@ -283,6 +283,7 @@ libc { __wait3_time64; __wait4_time64; %endif + close_range; } GLIBC_PRIVATE { # functions used in other libraries diff --git a/sysdeps/unix/sysv/linux/aarch64/libc.abilist b/sysdeps/unix/sysv/linux/aarch64/libc.abilist index 6f19b07b47..428b23fc65 100644 --- a/sysdeps/unix/sysv/linux/aarch64/libc.abilist +++ b/sysdeps/unix/sysv/linux/aarch64/libc.abilist @@ -2407,6 +2407,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/alpha/libc.abilist b/sysdeps/unix/sysv/linux/alpha/libc.abilist index 6ece449d4b..d5c24d09ee 100644 --- a/sysdeps/unix/sysv/linux/alpha/libc.abilist +++ b/sysdeps/unix/sysv/linux/alpha/libc.abilist @@ -2506,6 +2506,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/arc/libc.abilist b/sysdeps/unix/sysv/linux/arc/libc.abilist index 3bf846349f..6213e42bba 100644 --- a/sysdeps/unix/sysv/linux/arc/libc.abilist +++ b/sysdeps/unix/sysv/linux/arc/libc.abilist @@ -2166,6 +2166,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/arm/be/libc.abilist b/sysdeps/unix/sysv/linux/arm/be/libc.abilist index 08be998d35..37c395e4cb 100644 --- a/sysdeps/unix/sysv/linux/arm/be/libc.abilist +++ b/sysdeps/unix/sysv/linux/arm/be/libc.abilist @@ -300,6 +300,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/arm/le/libc.abilist b/sysdeps/unix/sysv/linux/arm/le/libc.abilist index ebd767ed96..dd850ce035 100644 --- a/sysdeps/unix/sysv/linux/arm/le/libc.abilist +++ b/sysdeps/unix/sysv/linux/arm/le/libc.abilist @@ -297,6 +297,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/bits/unistd_ext.h b/sysdeps/unix/sysv/linux/bits/unistd_ext.h index 2e529be577..ae9994403c 100644 --- a/sysdeps/unix/sysv/linux/bits/unistd_ext.h +++ b/sysdeps/unix/sysv/linux/bits/unistd_ext.h @@ -33,4 +33,27 @@ not detached and has not been joined. */ extern __pid_t gettid (void) __THROW; +#ifdef __has_include +# if __has_include ("linux/close_range.h") +# include "linux/close_range.h" +# endif #endif +/* Unshare the file descriptor table before closing file descriptors. */ +#ifndef CLOSE_RANGE_UNSHARE +# define CLOSE_RANGE_UNSHARE (1U << 1) +#endif +/* Set the FD_CLOEXEC bit instead of closing the file descriptor. */ +#ifndef CLOSE_RANGE_CLOEXEC +# define CLOSE_RANGE_CLOEXEC (1U << 2) +#endif + +/* Close all file descriptors in the range FD up to MAX_FD. The flag FLAGS + are define by the CLOSE_RANGE prefix. This function behaves like close + on the range, but in a fail-safe where it will either fail and not close + any file descriptor or close all of them. Gaps where the file descriptor + is invalid are ignored. Returns 0 on successor or -1 for failure (and + sets errno accordingly). */ +extern int close_range (unsigned int __fd, unsigned int __max_fd, + int __flags) __THROW; + +#endif /* __USE_GNU */ diff --git a/sysdeps/unix/sysv/linux/csky/libc.abilist b/sysdeps/unix/sysv/linux/csky/libc.abilist index 4a467e706e..48dc96e2d5 100644 --- a/sysdeps/unix/sysv/linux/csky/libc.abilist +++ b/sysdeps/unix/sysv/linux/csky/libc.abilist @@ -2432,6 +2432,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/hppa/libc.abilist b/sysdeps/unix/sysv/linux/hppa/libc.abilist index bdef8d2a34..13772d42d3 100644 --- a/sysdeps/unix/sysv/linux/hppa/libc.abilist +++ b/sysdeps/unix/sysv/linux/hppa/libc.abilist @@ -2385,6 +2385,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/i386/libc.abilist b/sysdeps/unix/sysv/linux/i386/libc.abilist index eba95a2cf0..6613f4c5f0 100644 --- a/sysdeps/unix/sysv/linux/i386/libc.abilist +++ b/sysdeps/unix/sysv/linux/i386/libc.abilist @@ -2569,6 +2569,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/ia64/libc.abilist b/sysdeps/unix/sysv/linux/ia64/libc.abilist index 3fbc5ae978..06d096d945 100644 --- a/sysdeps/unix/sysv/linux/ia64/libc.abilist +++ b/sysdeps/unix/sysv/linux/ia64/libc.abilist @@ -2344,6 +2344,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist index 0aef2ec43a..dc2466f3cd 100644 --- a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist +++ b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist @@ -301,6 +301,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist index a4704f7e96..d425dbad0b 100644 --- a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist +++ b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist @@ -2512,6 +2512,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist index 8f135f30c0..f1fc79525c 100644 --- a/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist +++ b/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist @@ -2483,6 +2483,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist index 719609ac10..7cf1c864b7 100644 --- a/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist +++ b/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist @@ -2480,6 +2480,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist index f9a6bccdc5..41b7927b86 100644 --- a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist @@ -2477,6 +2477,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist index cee02495c6..91f06d23ca 100644 --- a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist @@ -2475,6 +2475,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist index c9fdfe3a55..a4d3e06941 100644 --- a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist @@ -2483,6 +2483,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist index d27c97094e..3e96b69ba4 100644 --- a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist @@ -2395,6 +2395,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/nios2/libc.abilist b/sysdeps/unix/sysv/linux/nios2/libc.abilist index 25f270403f..3618eaa4e0 100644 --- a/sysdeps/unix/sysv/linux/nios2/libc.abilist +++ b/sysdeps/unix/sysv/linux/nios2/libc.abilist @@ -2522,6 +2522,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist index 0256a272dd..3951054b61 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist @@ -2539,6 +2539,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist index 946f855c64..4c2adbd8ab 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist @@ -2572,6 +2572,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist index 602da17327..e9d30b1ed7 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist @@ -2308,6 +2308,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist index 287285a21a..81c1eac79c 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist @@ -2603,6 +2603,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist b/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist index cdeee28d0f..6fa30b247b 100644 --- a/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist +++ b/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist @@ -2168,6 +2168,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist index a74b54d6bb..7c20b71f7a 100644 --- a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist +++ b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist @@ -2368,6 +2368,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist index e96371317c..fe0c9a2d06 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist +++ b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist @@ -2537,6 +2537,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist index aadc7c1d66..da52d75a7d 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist +++ b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist @@ -2345,6 +2345,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/sh/be/libc.abilist b/sysdeps/unix/sysv/linux/sh/be/libc.abilist index cc4a625cb4..6f022d19e8 100644 --- a/sysdeps/unix/sysv/linux/sh/be/libc.abilist +++ b/sysdeps/unix/sysv/linux/sh/be/libc.abilist @@ -2392,6 +2392,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/sh/le/libc.abilist b/sysdeps/unix/sysv/linux/sh/le/libc.abilist index 163d2cd613..a4934d88e9 100644 --- a/sysdeps/unix/sysv/linux/sh/le/libc.abilist +++ b/sysdeps/unix/sysv/linux/sh/le/libc.abilist @@ -2389,6 +2389,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist index 6eceee6b88..684e9d7b06 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist @@ -2532,6 +2532,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist index e6bac469ba..af10195edb 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist @@ -2367,6 +2367,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list index 62329abb49..29899eb264 100644 --- a/sysdeps/unix/sysv/linux/syscalls.list +++ b/sysdeps/unix/sysv/linux/syscalls.list @@ -99,3 +99,4 @@ pkey_alloc EXTRA pkey_alloc i:ii pkey_alloc pkey_free EXTRA pkey_free i:i pkey_free gettid EXTRA gettid Ei: __gettid gettid tgkill EXTRA tgkill i:iii __tgkill tgkill +close_range EXTRA close_range i:iii __close_range close_range diff --git a/sysdeps/unix/sysv/linux/tst-close_range.c b/sysdeps/unix/sysv/linux/tst-close_range.c new file mode 100644 index 0000000000..dccb6189c5 --- /dev/null +++ b/sysdeps/unix/sysv/linux/tst-close_range.c @@ -0,0 +1,303 @@ +/* Test for the close_range system call. + Copyright (C) 2021 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + 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/>. */ + +#include <dirent.h> +#include <errno.h> +#include <fcntl.h> +#include <limits.h> +#include <getopt.h> +#include <signal.h> +#include <stdbool.h> +#include <stdlib.h> +#include <stdint.h> + +#include <array_length.h> +#include <support/capture_subprocess.h> +#include <support/check.h> +#include <support/descriptors.h> +#include <support/support.h> +#include <support/xsched.h> +#include <support/xunistd.h> + +#define NFDS 100 + +static int +open_multiple_temp_files (void) +{ + /* Check if the temporary file descriptor has no no gaps. */ + int lowfd = xopen ("/dev/null", O_RDONLY, 0600); + for (int i = 1; i <= NFDS; i++) + TEST_COMPARE (xopen ("/dev/null", O_RDONLY, 0600), + lowfd + i); + return lowfd; +} + +static void +close_range_test_max_upper_limit (void) +{ + struct support_descriptors *descrs = support_descriptors_list (); + + int lowfd = open_multiple_temp_files (); + + { + int r = close_range (lowfd, ~0U, 0); + if (r == -1 && errno == ENOSYS) + FAIL_UNSUPPORTED ("close_range not supported"); + TEST_COMPARE (r, 0); + } + + support_descriptors_check (descrs); + support_descriptors_free (descrs); +} + +static void +close_range_test_common (int lowfd, unsigned int flags) +{ + const int maximum_fd = lowfd + NFDS; + const int half_fd = lowfd + NFDS / 2; + const int gap_1 = maximum_fd - 8; + + /* Close half of the descriptors and check result. */ + TEST_COMPARE (close_range (lowfd, half_fd, flags), 0); + for (int i = lowfd; i <= half_fd; i++) + { + TEST_COMPARE (fcntl (i, F_GETFL), -1); + TEST_COMPARE (errno, EBADF); + } + for (int i = half_fd + 1; i < maximum_fd; i++) + TEST_VERIFY (fcntl (i, F_GETFL) > -1); + + /* Create some gaps, close up to a threshold, and check result. */ + xclose (lowfd + 57); + xclose (lowfd + 78); + xclose (lowfd + 81); + xclose (lowfd + 82); + xclose (lowfd + 84); + xclose (lowfd + 90); + + TEST_COMPARE (close_range (half_fd + 1, gap_1, flags), 0); + for (int i = half_fd + 1; i < gap_1; i++) + { + TEST_COMPARE (fcntl (i, F_GETFL), -1); + TEST_COMPARE (errno, EBADF); + } + for (int i = gap_1 + 1; i < maximum_fd; i++) + TEST_VERIFY (fcntl (i, F_GETFL) > -1); + + /* Close the remaining but the last one. */ + TEST_COMPARE (close_range (gap_1 + 1, maximum_fd - 1, flags), 0); + for (int i = gap_1 + 1; i < maximum_fd - 1; i++) + { + TEST_COMPARE (fcntl (i, F_GETFL), -1); + TEST_COMPARE (errno, EBADF); + } + TEST_VERIFY (fcntl (maximum_fd, F_GETFL) > -1); + + /* Close the last one. */ + TEST_COMPARE (close_range (maximum_fd, maximum_fd, flags), 0); + TEST_COMPARE (fcntl (maximum_fd, F_GETFL), -1); + TEST_COMPARE (errno, EBADF); +} + +/* Basic tests: check if the syscall close ranges with and without gaps. */ +static void +close_range_test (void) +{ + struct support_descriptors *descrs = support_descriptors_list (); + + /* Check if the temporary file descriptor has no no gaps. */ + int lowfd = open_multiple_temp_files (); + + close_range_test_common (lowfd, 0); + + /* Double check by check the /proc. */ + support_descriptors_check (descrs); + support_descriptors_free (descrs); +} + +_Noreturn static int +close_range_test_fn (void *arg) +{ + int lowfd = (int) ((uintptr_t) arg); + close_range_test_common (lowfd, 0); + exit (EXIT_SUCCESS); +} + +/* Check if a clone_range on a subprocess created with CLONE_FILES close + the shared file descriptor table entries in the parent. */ +static void +close_range_test_subprocess (void) +{ + struct support_descriptors *descrs = support_descriptors_list (); + + /* Check if the temporary file descriptor has no no gaps. */ + int lowfd = open_multiple_temp_files (); + + struct support_stack stack = support_stack_alloc (4096); + + pid_t pid = xclone (close_range_test_fn, (void*) (uintptr_t) lowfd, + stack.stack, stack.size, CLONE_FILES | SIGCHLD); + TEST_VERIFY_EXIT (pid > 0); + int status; + xwaitpid (pid, &status, 0); + TEST_VERIFY (WIFEXITED (status)); + TEST_COMPARE (WEXITSTATUS (status), 0); + + support_stack_free (&stack); + + for (int i = lowfd; i < NFDS; i++) + TEST_VERIFY (fcntl (i, F_GETFL) < 0); + + support_descriptors_check (descrs); + support_descriptors_free (descrs); +} + + +_Noreturn static int +close_range_unshare_test_fn (void *arg) +{ + int lowfd = (int) ((uintptr_t) arg); + close_range_test_common (lowfd, CLOSE_RANGE_UNSHARE); + exit (EXIT_SUCCESS); +} + +/* Check if a close_range with CLOSE_RANGE_UNSHARE issued from a subprocess + created with CLONE_FILES does not close the parent file descriptor list. */ +static void +close_range_unshare_test (void) +{ + struct support_descriptors *descrs1 = support_descriptors_list (); + + /* Check if the temporary file descriptor has no no gaps. */ + int lowfd = open_multiple_temp_files (); + + struct support_descriptors *descrs2 = support_descriptors_list (); + + struct support_stack stack = support_stack_alloc (4096); + + pid_t pid = xclone (close_range_unshare_test_fn, (void*) (uintptr_t) lowfd, + stack.stack, stack.size, CLONE_FILES | SIGCHLD); + TEST_VERIFY_EXIT (pid > 0); + int status; + xwaitpid (pid, &status, 0); + TEST_VERIFY (WIFEXITED (status)); + TEST_COMPARE (WEXITSTATUS (status), 0); + + support_stack_free (&stack); + + for (int i = 0; i < NFDS; i++) + TEST_VERIFY (fcntl (i, F_GETFL) > -1); + + support_descriptors_check (descrs2); + support_descriptors_free (descrs2); + + TEST_COMPARE (close_range (lowfd, lowfd + NFDS, 0), 0); + + support_descriptors_check (descrs1); + support_descriptors_free (descrs1); +} + +static bool +is_in_array (int *arr, size_t len, int fd) +{ + bool r = false; + for (int i = 0; i < len; i++) + if (arr[i] == fd) + return true; + return r; +} + +static void +close_range_cloexec_test (void) +{ + /* Check if the temporary file descriptor has no no gaps. */ + const int lowfd = open_multiple_temp_files (); + + const int maximum_fd = lowfd + NFDS; + const int half_fd = lowfd + NFDS / 2; + const int gap_1 = maximum_fd - 8; + + /* Close half of the descriptors and check result. */ + int r = close_range (lowfd, half_fd, CLOSE_RANGE_CLOEXEC); + if (r == -1 && errno == EINVAL) + { + printf ("%s: CLOSE_RANGE_CLOEXEC not supported\n", __func__); + return; + } + for (int i = lowfd; i <= half_fd; i++) + { + int flags = fcntl (i, F_GETFD); + TEST_VERIFY (flags > -1); + TEST_COMPARE (flags & FD_CLOEXEC, FD_CLOEXEC); + } + for (int i = half_fd + 1; i < maximum_fd; i++) + TEST_VERIFY (fcntl (i, F_GETFL) > -1); + + /* Create some gaps, close up to a threshold, and check result. */ + static int gap_close[] = { 57, 78, 81, 82, 84, 90 }; + for (int i = 0; i < array_length (gap_close); i++) + xclose (gap_close[i]); + + TEST_COMPARE (close_range (half_fd + 1, gap_1, CLOSE_RANGE_CLOEXEC), 0); + for (int i = half_fd + 1; i < gap_1; i++) + { + int flags = fcntl (i, F_GETFD); + if (is_in_array (gap_close, array_length (gap_close), i)) + TEST_COMPARE (flags, -1); + else + { + TEST_VERIFY (flags > -1); + TEST_COMPARE (flags & FD_CLOEXEC, FD_CLOEXEC); + } + } + for (int i = gap_1 + 1; i < maximum_fd; i++) + TEST_VERIFY (fcntl (i, F_GETFL) > -1); + + /* Close the remaining but the last one. */ + TEST_COMPARE (close_range (gap_1 + 1, maximum_fd - 1, CLOSE_RANGE_CLOEXEC), + 0); + for (int i = gap_1 + 1; i < maximum_fd - 1; i++) + { + int flags = fcntl (i, F_GETFD); + TEST_VERIFY (flags > -1); + TEST_COMPARE (flags & FD_CLOEXEC, FD_CLOEXEC); + } + TEST_VERIFY (fcntl (maximum_fd, F_GETFL) > -1); + + /* Close the last one. */ + TEST_COMPARE (close_range (maximum_fd, maximum_fd, CLOSE_RANGE_CLOEXEC), 0); + { + int flags = fcntl (maximum_fd, F_GETFD); + TEST_VERIFY (flags > -1); + TEST_COMPARE (flags & FD_CLOEXEC, FD_CLOEXEC); + } +} + +static int +do_test (void) +{ + close_range_test_max_upper_limit (); + close_range_test (); + close_range_test_subprocess (); + close_range_unshare_test (); + close_range_cloexec_test (); + + return 0; +} + +#include <support/test-driver.c> diff --git a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist index e90f3e54c0..b5e2710a97 100644 --- a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist +++ b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist @@ -2323,6 +2323,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist index 792f681bba..ecd0b4efb8 100644 --- a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist +++ b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist @@ -2422,6 +2422,7 @@ GLIBC_2.34 aio_suspend64 F GLIBC_2.34 aio_write F GLIBC_2.34 aio_write64 F GLIBC_2.34 call_once F +GLIBC_2.34 close_range F GLIBC_2.34 cnd_broadcast F GLIBC_2.34 cnd_destroy F GLIBC_2.34 cnd_init F |