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c181840c93
This patch consolidates all the non cancellable close calls to use the __close_nocancel{_nostatus} identifier. For non cancellable targets it will be just a macro to call the default respective symbol while on Linux will be a internal one. Also, since it is used on libcrypto it is also exported in GLIBC_PRIVATE namespace. Checked on x86_64-linux-gnu, x86_64-linux-gnu-x32, and i686-linux-gnu. * sysdeps/generic/not-cancel.h (close_not_cancel): Remove macro. (close_not_cancel_no_status): Likewise. (__close_nocancel): New macro. (__close_nocancel_no_status): Likewise. * sysdeps/unix/sysv/linux/not-cancel.h (__close_nocancel): Remove macro. (close_not_cancel): Likewise. (close_not_cancel_no_status): Likewise. (__close_nocancel): New prototype. (__close_nocancel_no_status): New function. * sysdeps/unix/sysv/linux/close.c (__close_nocancel): New function. * catgets/open_catalog.c (__open_catalog): Replace close_not_cancel{_no_status) with __close_nocancel{_nostatus}. * gmon/gmon.c (write_gmon): Likewise. * iconv/gconv_cache.c (__gconv_load_cache): Likewise. * intl/loadmsgcat.c (close): Likewise. * io/ftw.c (open_dir_stream): Likewise. (ftw_startup): Likewise. * libio/fileops.c (_IO_file_open): Likewise. (_IO_file_close_mmap): Likewise. (_IO_file_close): Likewise. * libio/iopopen.c (_IO_dup2): Likewise. * locale/loadarchive.c (_nl_load_locale_from_archive): Likewise. * locale/loadlocale.c (_nl_load_locale): Likewise. * login/utmp_file.c (pututline_file): Likewise. (endutent_file): Likewise. * misc/daemon.c (daemon): Likewise. * nscd/nscd_getai.c (__nscd_getai): Likewise. * nscd/nscd_getgr_r.c (nscd_getgr_r): Likewise. * nscd/nscd_gethst_r.c (nscd_gethst_r): Likewise. * nscd/nscd_getpw_r.c (nscd_getpw_r): Likewise. * nscd/nscd_getserv_r.c (nscd_getserv_r): Likewise. * nscd/nscd_helper.c (open_socket): Likewise. (__nscd_open_socket): Likewise. * nscd/nscd_initgroups.c (__nscd_getgrouplist): Likewise. * nscd/nscd_netgroup.c (__nscd_setnetgrent): Likewise. (__nscd_innetgr): Likewise. * nss/nss_db/db-open.c (internal_setent): Likewise. * resolv/res-close.c (__res_iclose): Likewise. * sunrpc/pm_getmaps.c (pmap_getmaps): Likewise. * sysdeps/posix/closedir.c (__closedir): Likewise. * sysdeps/posix/getaddrinfo.c (getaddrinfo): Likewise. * sysdeps/posix/getcwd.c (__getcwd): Likewise. * sysdeps/posix/opendir.c (tryopen_o_directory): Likewise. (opendir_tail): Likewise. * sysdeps/posix/spawni.c (__spawni_child): Likewise. * sysdeps/unix/sysv/linux/check_native.c (__check_native): Likewise. * sysdeps/unix/sysv/linux/check_pf.c (__check_pf): Likewise. * sysdeps/unix/sysv/linux/fips-private.h (fips_enabled_p): Likewise. * sysdeps/unix/sysv/linux/gethostid.c (sethostid): Likewise. (gethostid): Likewise. * sysdeps/unix/sysv/linux/getloadavg.c (getloadavg): Likewise. * sysdeps/unix/sysv/linux/getlogin_r.c (__getlogin_r_loginuid): Likewise. * sysdeps/unix/sysv/linux/getsysstats.c (__get_nprocs): Likewise. * sysdeps/unix/sysv/linux/grantpt.c (close_all_fds): Likewise. * sysdeps/unix/sysv/linux/i386/smp.h (is_smp_system): Likewise. * sysdeps/unix/sysv/linux/ia64/has_cpuclock.c (has_cpuclock): Likewise. * sysdeps/unix/sysv/linux/if_index.c (__if_nametoindex): Likewise. * sysdeps/unix/sysv/linux/libc_fatal.c (backtrace_and_maps): Likewise. * sysdeps/unix/sysv/linux/malloc-sysdep.h (check_may_shrink_heap): Likewise. * sysdeps/unix/sysv/linux/mq_notify.c (init_mq_netlink): Likewise. * sysdeps/unix/sysv/linux/pthread_getname.c (pthread_getname_np): Likewise. * sysdeps/unix/sysv/linux/pthread_setname.c (pthread_setname_np): Likewise. * sysdeps/unix/sysv/linux/spawni.c (__spawni_child): Likewise. * sysdeps/unix/sysv/linux/sysconf.c (__sysconf): Likewise.
337 lines
8.9 KiB
C
337 lines
8.9 KiB
C
/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper, <drepper@gnu.org>.
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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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<http://www.gnu.org/licenses/>. */
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#include <byteswap.h>
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#include <endian.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#ifdef _POSIX_MAPPED_FILES
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# include <sys/mman.h>
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#endif
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#include <sys/stat.h>
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#include "catgetsinfo.h"
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#include <not-cancel.h>
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#define SWAPU32(w) bswap_32 (w)
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int
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__open_catalog (const char *cat_name, const char *nlspath, const char *env_var,
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__nl_catd catalog)
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{
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int fd = -1;
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struct stat64 st;
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int swapping;
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size_t cnt;
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size_t max_offset;
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size_t tab_size;
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const char *lastp;
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int result = -1;
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char *buf = NULL;
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if (strchr (cat_name, '/') != NULL || nlspath == NULL)
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fd = __open_nocancel (cat_name, O_RDONLY);
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else
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{
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const char *run_nlspath = nlspath;
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#define ENOUGH(n) \
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if (__glibc_unlikely (bufact + (n) >= bufmax)) \
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{ \
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char *old_buf = buf; \
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bufmax += (bufmax < 256 + (n)) ? 256 + (n) : bufmax; \
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buf = realloc (buf, bufmax); \
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if (__glibc_unlikely (buf == NULL)) \
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{ \
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free (old_buf); \
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return -1; \
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} \
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}
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/* The RUN_NLSPATH variable contains a colon separated list of
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descriptions where we expect to find catalogs. We have to
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recognize certain % substitutions and stop when we found the
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first existing file. */
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size_t bufact;
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size_t bufmax = 0;
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size_t len;
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fd = -1;
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while (*run_nlspath != '\0')
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{
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bufact = 0;
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if (*run_nlspath == ':')
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{
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/* Leading colon or adjacent colons - treat same as %N. */
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len = strlen (cat_name);
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ENOUGH (len);
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memcpy (&buf[bufact], cat_name, len);
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bufact += len;
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}
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else
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while (*run_nlspath != ':' && *run_nlspath != '\0')
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if (*run_nlspath == '%')
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{
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const char *tmp;
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++run_nlspath; /* We have seen the `%'. */
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switch (*run_nlspath++)
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{
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case 'N':
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/* Use the catalog name. */
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len = strlen (cat_name);
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ENOUGH (len);
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memcpy (&buf[bufact], cat_name, len);
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bufact += len;
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break;
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case 'L':
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/* Use the current locale category value. */
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len = strlen (env_var);
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ENOUGH (len);
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memcpy (&buf[bufact], env_var, len);
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bufact += len;
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break;
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case 'l':
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/* Use language element of locale category value. */
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tmp = env_var;
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do
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{
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ENOUGH (1);
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buf[bufact++] = *tmp++;
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}
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while (*tmp != '\0' && *tmp != '_' && *tmp != '.');
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break;
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case 't':
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/* Use territory element of locale category value. */
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tmp = env_var;
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do
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++tmp;
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while (*tmp != '\0' && *tmp != '_' && *tmp != '.');
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if (*tmp == '_')
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{
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++tmp;
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do
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{
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ENOUGH (1);
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buf[bufact++] = *tmp++;
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}
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while (*tmp != '\0' && *tmp != '.');
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}
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break;
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case 'c':
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/* Use code set element of locale category value. */
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tmp = env_var;
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do
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++tmp;
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while (*tmp != '\0' && *tmp != '.');
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if (*tmp == '.')
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{
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++tmp;
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do
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{
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ENOUGH (1);
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buf[bufact++] = *tmp++;
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}
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while (*tmp != '\0');
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}
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break;
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case '%':
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ENOUGH (1);
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buf[bufact++] = '%';
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break;
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default:
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/* Unknown variable: ignore this path element. */
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bufact = 0;
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while (*run_nlspath != '\0' && *run_nlspath != ':')
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++run_nlspath;
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break;
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}
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}
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else
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{
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ENOUGH (1);
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buf[bufact++] = *run_nlspath++;
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}
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ENOUGH (1);
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buf[bufact] = '\0';
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if (bufact != 0)
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{
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fd = __open_nocancel (buf, O_RDONLY);
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if (fd >= 0)
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break;
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}
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++run_nlspath;
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}
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}
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/* Avoid dealing with directories and block devices */
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if (__builtin_expect (fd, 0) < 0)
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{
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free (buf);
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return -1;
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}
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if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0)
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goto close_unlock_return;
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if (__builtin_expect (!S_ISREG (st.st_mode), 0)
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|| (size_t) st.st_size < sizeof (struct catalog_obj))
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{
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/* `errno' is not set correctly but the file is not usable.
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Use an reasonable error value. */
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__set_errno (EINVAL);
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goto close_unlock_return;
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}
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catalog->file_size = st.st_size;
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#ifdef _POSIX_MAPPED_FILES
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# ifndef MAP_COPY
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/* Linux seems to lack read-only copy-on-write. */
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# define MAP_COPY MAP_PRIVATE
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# endif
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# ifndef MAP_FILE
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/* Some systems do not have this flag; it is superfluous. */
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# define MAP_FILE 0
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# endif
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catalog->file_ptr =
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(struct catalog_obj *) __mmap (NULL, st.st_size, PROT_READ,
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MAP_FILE|MAP_COPY, fd, 0);
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if (__builtin_expect (catalog->file_ptr != (struct catalog_obj *) MAP_FAILED,
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1))
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/* Tell the world we managed to mmap the file. */
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catalog->status = mmapped;
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else
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#endif /* _POSIX_MAPPED_FILES */
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{
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/* mmap failed perhaps because the system call is not
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implemented. Try to load the file. */
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size_t todo;
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catalog->file_ptr = malloc (st.st_size);
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if (catalog->file_ptr == NULL)
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goto close_unlock_return;
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todo = st.st_size;
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/* Save read, handle partial reads. */
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do
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{
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size_t now = __read_nocancel (fd, (((char *) catalog->file_ptr)
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+ (st.st_size - todo)), todo);
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if (now == 0 || now == (size_t) -1)
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{
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#ifdef EINTR
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if (now == (size_t) -1 && errno == EINTR)
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continue;
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#endif
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free ((void *) catalog->file_ptr);
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goto close_unlock_return;
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}
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todo -= now;
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}
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while (todo > 0);
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catalog->status = malloced;
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}
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/* Determine whether the file is a catalog file and if yes whether
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it is written using the correct byte order. Else we have to swap
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the values. */
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if (__glibc_likely (catalog->file_ptr->magic == CATGETS_MAGIC))
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swapping = 0;
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else if (catalog->file_ptr->magic == SWAPU32 (CATGETS_MAGIC))
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swapping = 1;
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else
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{
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invalid_file:
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/* Invalid file. Free the resources and mark catalog as not
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usable. */
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#ifdef _POSIX_MAPPED_FILES
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if (catalog->status == mmapped)
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__munmap ((void *) catalog->file_ptr, catalog->file_size);
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else
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#endif /* _POSIX_MAPPED_FILES */
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free (catalog->file_ptr);
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goto close_unlock_return;
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}
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#define SWAP(x) (swapping ? SWAPU32 (x) : (x))
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/* Get dimensions of the used hashing table. */
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catalog->plane_size = SWAP (catalog->file_ptr->plane_size);
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catalog->plane_depth = SWAP (catalog->file_ptr->plane_depth);
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/* The file contains two versions of the pointer tables. Pick the
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right one for the local byte order. */
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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catalog->name_ptr = &catalog->file_ptr->name_ptr[0];
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#elif __BYTE_ORDER == __BIG_ENDIAN
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catalog->name_ptr = &catalog->file_ptr->name_ptr[catalog->plane_size
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* catalog->plane_depth
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* 3];
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#else
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# error Cannot handle __BYTE_ORDER byte order
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#endif
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/* The rest of the file contains all the strings. They are
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addressed relative to the position of the first string. */
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catalog->strings =
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(const char *) &catalog->file_ptr->name_ptr[catalog->plane_size
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* catalog->plane_depth * 3 * 2];
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/* Determine the largest string offset mentioned in the table. */
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max_offset = 0;
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tab_size = 3 * catalog->plane_size * catalog->plane_depth;
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for (cnt = 2; cnt < tab_size; cnt += 3)
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if (catalog->name_ptr[cnt] > max_offset)
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max_offset = catalog->name_ptr[cnt];
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/* Now we can check whether the file is large enough to contain the
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tables it says it contains. */
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if ((size_t) st.st_size
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<= (sizeof (struct catalog_obj) + 2 * tab_size + max_offset))
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/* The last string is not contained in the file. */
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goto invalid_file;
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lastp = catalog->strings + max_offset;
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max_offset = (st.st_size
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- sizeof (struct catalog_obj) + 2 * tab_size + max_offset);
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while (*lastp != '\0')
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{
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if (--max_offset == 0)
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goto invalid_file;
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++lastp;
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}
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/* We succeeded. */
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result = 0;
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/* Release the lock again. */
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close_unlock_return:
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__close_nocancel_nostatus (fd);
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free (buf);
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return result;
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}
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libc_hidden_def (__open_catalog)
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