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ldconfig: Move endswithn into a new header file

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is_gdb_python_file is doing a similar test, so it can use this helper
function as well.

Signed-off-by: Adam Sampson <ats@offog.org>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Adam Sampson 2024-05-06 18:16:32 +01:00 committed by Andreas K. Hüttel
parent ab6045728f
commit ed2b8d3a86
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GPG Key ID: DC2B16215ED5412A
3 changed files with 36 additions and 12 deletions
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33
elf/endswith.h Normal file
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@ -0,0 +1,33 @@
/* Copyright (C) 2023-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <https://www.gnu.org/licenses/>. */
#ifndef _ENDSWITH_H
#define _ENDSWITH_H
#include <string.h>
/* Return true if the N bytes at NAME end with with the characters in
the string SUFFIX. (NAME[N + 1] does not have to be a null byte.)
Expected to be called with a string literal for SUFFIX. */
static inline bool
endswithn (const char *name, size_t n, const char *suffix)
{
return (n >= strlen (suffix)
&& memcmp (name + n - strlen (suffix), suffix,
strlen (suffix)) == 0);
}
#endif /* _ENDSWITH_H */

12
elf/ldconfig.c
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@ -40,6 +40,7 @@
#include <libgen.h> #include <libgen.h>
#include <ldconfig.h> #include <ldconfig.h>
#include <endswith.h>
#include <dl-cache.h> #include <dl-cache.h>
#include <dl-hwcaps.h> #include <dl-hwcaps.h>
#include <dl-is_dso.h> #include <dl-is_dso.h>
@ -661,17 +662,6 @@ struct dlib_entry
struct dlib_entry *next; struct dlib_entry *next;
}; };
/* Return true if the N bytes at NAME end with with the characters in
the string SUFFIX. (NAME[N + 1] does not have to be a null byte.)
Expected to be called with a string literal for SUFFIX. */
static inline bool
endswithn (const char *name, size_t n, const char *suffix)
{
return (n >= strlen (suffix)
&& memcmp (name + n - strlen (suffix), suffix,
strlen (suffix)) == 0);
}
/* Skip some temporary DSO files. These files may be partially written /* Skip some temporary DSO files. These files may be partially written
and lead to ldconfig crashes when examined. */ and lead to ldconfig crashes when examined. */
static bool static bool

3
elf/readlib.c
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@ -33,6 +33,7 @@
#include <gnu/lib-names.h> #include <gnu/lib-names.h>
#include <ldconfig.h> #include <ldconfig.h>
#include <endswith.h>
#define Elf32_CLASS ELFCLASS32 #define Elf32_CLASS ELFCLASS32
#define Elf64_CLASS ELFCLASS64 #define Elf64_CLASS ELFCLASS64
@ -48,7 +49,7 @@ static bool
is_gdb_python_file (const char *name) is_gdb_python_file (const char *name)
{ {
size_t len = strlen (name); size_t len = strlen (name);
return len > 7 && strcmp (name + len - 7, "-gdb.py") == 0; return endswithn (name, len, "-gdb.py");
} }
/* Returns 0 if everything is ok, != 0 in case of error. */ /* Returns 0 if everything is ok, != 0 in case of error. */