Bug 53984
| Summary: | /usr/include/bits/socket.h struct cmsghdr broken | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | Brian Barrett <brbarret> |
| Component: | glibc | Assignee: | Jakub Jelinek <jakub> |
| Status: | CLOSED ERRATA | QA Contact: | Aaron Brown <abrown> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.1 | CC: | fweimer |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| URL: | http://www.osl.iu.edu/~brbarret/redhat/ | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2001-09-25 09:39:53 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Should be fixed in glibc-2.2.4-19. |
From Bugzilla Helper: User-Agent: Mozilla/4.78 [en] (X11; U; SunOS 5.8 sun4u) Description of problem: On Red Hat 7.1, the struct cmsghdr defined in /usr/include/bits/socket.h is broken when used with non-gcc compilers. The size of the struct is different on non-gcc compilers than on gcc compilers, so any code compiled with non-gcc compilers and linked with the glibc rpm package will fail. This is true even if the CMSG_DATA macro is used. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. Download the broken_cmsghdr.c from the URL above 2. Compile with gcc; run the exectuable. Notice that it works. 3. Compile with something other than gcc (e.g., Portland Group compilers, pgcc), and notice that it doesn't work. 4. Long comments in the sample .c file explain the problem. Additional info: The problem is actually in /usr/include/bits/socket.h, because a member in the struct cmsghdr is not protected properly for non-gcc compilers. Here's a quick patch to fix /usr/include/bits/socket.h (other linux distros do this): --- socket.h Mon Sep 24 17:26:48 2001 +++ /usr/include/bits/socket.h Mon Sep 24 15:42:27 2001 @@ -227,10 +227,8 @@ of cmsghdr structure. */ int cmsg_level; /* Originating protocol. */ int cmsg_type; /* Protocol specific type. */ -#if !defined __STRICT_ANSI__ && defined __GNUC__ && __GNUC__ >= 2 __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data. */ /* XXX Perhaps this should be removed. */ -#endif }; /* Ancillary data object manipulation macros. */