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hookmacros.h: Be more careful to restore the errno.

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check_handle_fd() or handle_fd_pre() might also modify it.
This commit is contained in:
Simon Ruderich
2013-06-01 22:47:23 +02:00
parent 73870d5ed5
commit 66140e14e4
1 changed files with 7 additions and 4 deletions
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11
src/hookmacros.h
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@@ -26,6 +26,7 @@
#define _HOOK_PRE(type, name) \
int handle; \
int saved_errno = errno; \
DLSYM_FUNCTION(real_ ## name, #name);
#define _HOOK_PRE_FD(type, name, fd) \
type result; \
@@ -35,19 +36,21 @@
handle = check_handle_fd(fd); \
if (handle) { \
handle_fd_pre(fd, handle); \
}
} \
errno = saved_errno;
#define _HOOK_PRE_FILE(type, name, file) \
type result; \
_HOOK_PRE(type, name) \
handle = check_handle_fd(fileno(file)); \
if (handle) { \
handle_file_pre(file, handle); \
}
} \
errno = saved_errno;
/* Save and restore the errno to make sure we return the errno of the original
* function call. */
#define _HOOK_POST_FD_(fd) \
if (handle) { \
int saved_errno = errno; \
saved_errno = errno; \
handle_fd_post(fd, handle); \
errno = saved_errno; \
}
@@ -56,7 +59,7 @@
return result;
#define _HOOK_POST_FILE(file) \
if (handle) { \
int saved_errno = errno; \
saved_errno = errno; \
handle_file_post(file, handle); \
errno = saved_errno; \
} \