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Hook perror(3).

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This commit is contained in:
Simon Ruderich
2013-06-01 22:08:45 +02:00
parent b34a8ce50b
commit ad50ad9c54
4 changed files with 25 additions and 3 deletions
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18
src/hookmacros.h
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@@ -30,6 +30,8 @@
DLSYM_FUNCTION(real_ ## name, #name);
#define _HOOK_PRE_FD(type, name, fd) \
_HOOK_PRE(type, name) \
_HOOK_PRE_FD_ALONE(type, name, fd)
#define _HOOK_PRE_FD_ALONE(type, name, fd) \
handle = check_handle_fd(fd); \
if (handle) { \
handle_fd_pre(fd, handle); \
@@ -42,12 +44,14 @@
}
/* Save and restore the errno to make sure we return the errno of the original
* function call. */
#define _HOOK_POST_FD(fd) \
#define _HOOK_POST_FD_ALONE(fd) \
if (handle) { \
int saved_errno = errno; \
handle_fd_post(fd, handle); \
errno = saved_errno; \
} \
}
#define _HOOK_POST_FD(fd) \
_HOOK_POST_FD_ALONE(fd) \
return result;
#define _HOOK_POST_FILE(file) \
if (handle) { \
@@ -58,6 +62,16 @@
return result;
#define HOOK_VOID1(type, name, fd, type1, arg1) \
static type (*real_ ## name)(type1); \
type name(type1 arg1) { \
int handle; \
DLSYM_FUNCTION(real_ ## name, #name); \
_HOOK_PRE_FD_ALONE(type, name, fd) \
real_ ## name(arg1); \
_HOOK_POST_FD_ALONE(fd) \
}
#define HOOK_FD3(type, name, fd, type1, arg1, type2, arg2, type3, arg3) \
static type (*real_ ## name)(type1, type2, type3); \
type name(type1 arg1, type2 arg2, type3 arg3) { \