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property_get: do argument checking. 

Try to verify, at compile time, that the supplied
value buffer is large enough.

Change-Id: I91fa560d3ceff87609194269356ac634bdbf2ede
This commit is contained in:
Nick Kralevich 2013-05-23 10:01:42 -07:00
parent 53df3ade9b
commit 0e54ec825e
1 changed files with 19 additions and 0 deletions
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19
include/cutils/properties.h
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@ -17,6 +17,8 @@
#ifndef __CUTILS_PROPERTIES_H
#define __CUTILS_PROPERTIES_H
#include <sys/cdefs.h>
#include <stddef.h>
#include <sys/system_properties.h>
#ifdef __cplusplus
@ -48,6 +50,23 @@ int property_set(const char *key, const char *value);
int property_list(void (*propfn)(const char *key, const char *value, void *cookie), void *cookie);
#if defined(__BIONIC_FORTIFY)
extern int __property_get_real(const char *, char *, const char *)
__asm__(__USER_LABEL_PREFIX__ "property_get");
extern void __property_get_too_small_error()
__attribute__((__error__("property_get() called with too small of a buffer")));
__BIONIC_FORTIFY_INLINE
int property_get(const char *key, char *value, const char *default_value) {
size_t bos = __bos(value);
if (bos < PROPERTY_VALUE_MAX) {
__property_get_too_small_error();
}
return __property_get_real(key, value, default_value);
}
#endif
#ifdef HAVE_SYSTEM_PROPERTY_SERVER
/*