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122 lines
4.6 KiB
C
122 lines
4.6 KiB
C
/* Common extra functions.
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Copyright (C) 2016-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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<https://www.gnu.org/licenses/>. */
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/* This header file should only contain definitions compatible with
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C90. (Using __attribute__ is fine because <features.h> provides a
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fallback.) */
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#ifndef SUPPORT_H
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#define SUPPORT_H
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#include <stddef.h>
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#include <sys/cdefs.h>
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/* For mode_t. */
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#include <sys/stat.h>
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/* For ssize_t and off64_t. */
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#include <sys/types.h>
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__BEGIN_DECLS
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/* Write a message to standard output. Can be used in signal
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handlers. */
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void write_message (const char *message) __attribute__ ((nonnull (1)));
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/* Avoid all the buffer overflow messages on stderr. */
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void ignore_stderr (void);
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/* Set fortification error handler. Used when tests want to verify that bad
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code is caught by the library. */
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void set_fortify_handler (void (*handler) (int sig));
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/* Report an out-of-memory error for the allocation of SIZE bytes in
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FUNCTION, terminating the process. */
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void oom_error (const char *function, size_t size)
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__attribute__ ((nonnull (1)));
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/* Return a pointer to a memory region of SIZE bytes. The memory is
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initialized to zero and will be shared with subprocesses (across
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fork). The returned pointer must be freed using
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support_shared_free; it is not compatible with the malloc
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functions. */
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void *support_shared_allocate (size_t size);
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/* Deallocate a pointer returned by support_shared_allocate. */
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void support_shared_free (void *);
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/* Write CONTENTS to the file PATH. Create or truncate the file as
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needed. The file mode is 0666 masked by the umask. Terminate the
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process on error. */
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void support_write_file_string (const char *path, const char *contents);
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/* Quote the contents of the byte array starting at BLOB, of LENGTH
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bytes, in such a way that the result string can be included in a C
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literal (in single/double quotes, without putting the quotes into
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the result). */
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char *support_quote_blob (const void *blob, size_t length);
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/* Quote the contents of the string, in such a way that the result
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string can be included in a C literal (in single/double quotes,
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without putting the quotes into the result). */
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char *support_quote_string (const char *);
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/* Returns non-zero if the file descriptor is a regular file on a file
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system which supports holes (that is, seeking and writing does not
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allocate storage for the range of zeros). FD must refer to a
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regular file open for writing, and initially empty. */
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int support_descriptor_supports_holes (int fd);
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/* Error-checking wrapper functions which terminate the process on
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error. */
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void *xmalloc (size_t) __attribute__ ((malloc));
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void *xcalloc (size_t n, size_t s) __attribute__ ((malloc));
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void *xrealloc (void *p, size_t n);
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void *xposix_memalign (size_t alignment, size_t n);
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char *xasprintf (const char *format, ...)
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__attribute__ ((format (printf, 1, 2), malloc));
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char *xstrdup (const char *);
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char *xstrndup (const char *, size_t);
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char *xsetlocale (int category, const char *locale);
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/* These point to the TOP of the source/build tree, not your (or
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support's) subdirectory. */
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extern const char support_srcdir_root[];
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extern const char support_objdir_root[];
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/* Corresponds to the path to the runtime linker used by the testsuite,
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e.g. OBJDIR_PATH/elf/ld-linux-x86-64.so.2 */
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extern const char support_objdir_elf_ldso[];
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/* Corresponds to the --prefix= passed to configure. */
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extern const char support_install_prefix[];
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/* Corresponds to the install's lib/ or lib64/ directory. */
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extern const char support_libdir_prefix[];
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/* Corresponds to the install's bin/ directory. */
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extern const char support_bindir_prefix[];
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/* Corresponds to the install's sbin/ directory. */
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extern const char support_sbindir_prefix[];
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/* Corresponds to the install's sbin/ directory (without prefix). */
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extern const char support_install_rootsbindir[];
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extern ssize_t support_copy_file_range (int, off64_t *, int, off64_t *,
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size_t, unsigned int);
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__END_DECLS
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#endif /* SUPPORT_H */
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