generic-library/bionic
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Don't expose non-standard basename_r and dirname_r in LP64.

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Bug: 17407423
Change-Id: I47fe499a4c396bf09d7b78fd828728d04777398b
This commit is contained in:
Elliott Hughes 2014-09-05 16:12:42 -07:00
parent 5beddb7d64
commit f0e9458ea5
3 changed files with 28 additions and 37 deletions
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34
libc/bionic/libgen.cpp
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@ -36,22 +36,7 @@
#include "private/ThreadLocalBuffer.h"
GLOBAL_INIT_THREAD_LOCAL_BUFFER(basename);
GLOBAL_INIT_THREAD_LOCAL_BUFFER(dirname);
char* basename(const char* path) {
LOCAL_INIT_THREAD_LOCAL_BUFFER(char*, basename, MAXPATHLEN);
int rc = basename_r(path, basename_tls_buffer, basename_tls_buffer_size);
return (rc < 0) ? NULL : basename_tls_buffer;
}
char* dirname(const char* path) {
LOCAL_INIT_THREAD_LOCAL_BUFFER(char*, dirname, MAXPATHLEN);
int rc = dirname_r(path, dirname_tls_buffer, dirname_tls_buffer_size);
return (rc < 0) ? NULL : dirname_tls_buffer;
}
int basename_r(const char* path, char* buffer, size_t buffer_size) {
__LIBC64_HIDDEN__ int basename_r(const char* path, char* buffer, size_t buffer_size) {
const char* startp = NULL;
const char* endp = NULL;
int len;
@ -103,7 +88,7 @@ int basename_r(const char* path, char* buffer, size_t buffer_size) {
return result;
}
int dirname_r(const char* path, char* buffer, size_t buffer_size) {
__LIBC64_HIDDEN__ int dirname_r(const char* path, char* buffer, size_t buffer_size) {
const char* endp = NULL;
int len;
int result;
@ -161,3 +146,18 @@ int dirname_r(const char* path, char* buffer, size_t buffer_size) {
}
return result;
}
GLOBAL_INIT_THREAD_LOCAL_BUFFER(basename);
GLOBAL_INIT_THREAD_LOCAL_BUFFER(dirname);
char* basename(const char* path) {
LOCAL_INIT_THREAD_LOCAL_BUFFER(char*, basename, MAXPATHLEN);
int rc = basename_r(path, basename_tls_buffer, basename_tls_buffer_size);
return (rc < 0) ? NULL : basename_tls_buffer;
}
char* dirname(const char* path) {
LOCAL_INIT_THREAD_LOCAL_BUFFER(char*, dirname, MAXPATHLEN);
int rc = dirname_r(path, dirname_tls_buffer, dirname_tls_buffer_size);
return (rc < 0) ? NULL : dirname_tls_buffer;
}

25
libc/include/libgen.h
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@ -33,24 +33,15 @@
__BEGIN_DECLS
/* our version of dirname/basename don't modify the input path */
extern char* dirname (const char* path);
extern char* basename(const char* path);
/* On Android these don't modify their input, and use thread-local storage for their results. */
extern char* basename(const char*);
extern char* dirname(const char*);
/* special thread-safe Bionic versions
*
* if 'buffer' is NULL, 'bufflen' is ignored and the length of the result is returned
* otherwise, place result in 'buffer'
*
* at most bufflen-1 characters written, plus a terminating zero
*
* return length of result, or -1 in case of error, with errno set to:
*
* ERANGE: buffer is too short
* ENAMETOOLONG: the result is too long for a valid path
*/
extern int dirname_r(const char* path, char* buffer, size_t bufflen);
extern int basename_r(const char* path, char* buffer, size_t bufflen);
#if !defined(__LP64__)
/* These non-standard functions are not needed on Android; basename and dirname use thread-local storage. */
extern int dirname_r(const char*, char*, size_t);
extern int basename_r(const char*, char*, size_t);
#endif
__END_DECLS

6
tests/libgen_test.cpp
View File

@ -64,7 +64,7 @@ TEST(libgen, dirname) {
TestDirname("/", "/");
}
#if defined(__BIONIC__)
#if defined(__BIONIC__) && !defined(__LP64__)
static void TestBasename(const char* in, const char* expected_out, int expected_rc,
char* buf, size_t buf_size, int expected_errno) {
errno = 0;
@ -89,7 +89,7 @@ static void TestDirname(const char* in, const char* expected_out, int expected_r
#endif // __BIONIC__
TEST(libgen, basename_r) {
#if defined(__BIONIC__)
#if defined(__BIONIC__) && !defined(__LP64__)
char buf[256];
TestBasename("", ".", 1, NULL, 0, 0);
TestBasename("", ".", -1, buf, 0, ERANGE);
@ -108,7 +108,7 @@ TEST(libgen, basename_r) {
}
TEST(libgen, dirname_r) {
#if defined(__BIONIC__)
#if defined(__BIONIC__) && !defined(__LP64__)
char buf[256];
TestDirname("", ".", 1, NULL, 0, 0);
TestDirname("", ".", -1, buf, 0, ERANGE);