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author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2020-06-14 15:50:44 +0000 |
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committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2020-06-14 15:53:21 +0000 |
commit | 662de0889a040e3ebeefcfdde547edc8a11f87d7 (patch) | |
tree | 6fe6a2490e6a9b9e08b01b2a62fafcf67a220cc6 /sysdeps/mach/hurd/pwrite64_nocancel.c | |
parent | 76fe4ef4be842e78e175a200f7afa4a567b57db2 (diff) | |
download | glibc-662de0889a040e3ebeefcfdde547edc8a11f87d7.tar.gz glibc-662de0889a040e3ebeefcfdde547edc8a11f87d7.tar.xz glibc-662de0889a040e3ebeefcfdde547edc8a11f87d7.zip |
hurd: Make write and pwrite64 cancellation points
and add _nocancel variants. * sysdeps/mach/hurd/write.c (__libc_write): Call __write_nocancel surrounded by enabling async cancel, to replace implementation moved to... * sysdeps/mach/hurd/write_nocancel.c (__write_nocancel): ... here. * sysdeps/mach/hurd/pwrite64.c (__libc_pwrite64): Call __pwrite64_nocancel surrounded by enabling async cancel, to replace implementation moved to... * sysdeps/mach/hurd/pwrite64_nocancel.c (__pwrite64_nocancel): ... here. * sysdeps/mach/hurd/Makefile (sysdep_routines): Add write_nocancel and pwrite64_nocancel. * sysdeps/mach/hurd/not-cancel.h (__write_nocancel, __pwrite64_nocancel): Replace macros with prototypes with a hidden proto on libc. * sysdeps/mach/hurd/dl-sysdep.c (__write_nocancel): New alias, check that it is not hidden. * sysdeps/mach/hurd/Versions (libc.GLIBC_PRIVATE): Add __write_nocancel. (ld.GLIBC_PRIVATE): Add __write_nocancel. * sysdeps/mach/hurd/i386/localplt.data (__write_nocancel): Add reference.
Diffstat (limited to 'sysdeps/mach/hurd/pwrite64_nocancel.c')
-rw-r--r-- | sysdeps/mach/hurd/pwrite64_nocancel.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/pwrite64_nocancel.c b/sysdeps/mach/hurd/pwrite64_nocancel.c new file mode 100644 index 0000000000..f6bdbbe0b1 --- /dev/null +++ b/sysdeps/mach/hurd/pwrite64_nocancel.c @@ -0,0 +1,35 @@ +/* Write block to given position in file without changing file pointer. + Hurd version. + Copyright (C) 2001-2020 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 <errno.h> +#include <unistd.h> +#include <hurd/fd.h> +#include <not-cancel.h> + +ssize_t +__pwrite64_nocancel (int fd, const void *buf, size_t nbytes, off64_t offset) +{ + error_t err; + if (offset < 0) + err = EINVAL; + else + err = HURD_FD_USE (fd, _hurd_fd_write (descriptor, buf, &nbytes, offset)); + return err ? __hurd_dfail (fd, err) : nbytes; +} +libc_hidden_weak (__pwrite64_nocancel) |