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author | Florian Weimer <fweimer@redhat.com> | 2016-04-14 08:54:57 +0200 |
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committer | Florian Weimer <fweimer@redhat.com> | 2016-04-14 08:54:57 +0200 |
commit | b49ab5f4503f36dcbf43f821f817da66b2931fe6 (patch) | |
tree | 3b3eb99facf62df3f8f436ef71a66aee7c953c2c /stdlib/stdlib.h | |
parent | 5f5682b9654101ccaf375c2814cbddbe6033a725 (diff) | |
download | glibc-b49ab5f4503f36dcbf43f821f817da66b2931fe6.tar.gz |
Remove union wait [BZ #19613]
The overloading approach in the W* macros was incompatible with
integer expressions of a type different from int. Applications
using union wait and these macros will have to migrate to the
POSIX-specified int status type.
Diffstat (limited to 'stdlib/stdlib.h')
-rw-r--r-- | stdlib/stdlib.h | 53 |
1 files changed, 7 insertions, 46 deletions
diff --git a/stdlib/stdlib.h b/stdlib/stdlib.h index cc77708b23..d0c78facdd 100644 --- a/stdlib/stdlib.h +++ b/stdlib/stdlib.h @@ -41,54 +41,15 @@ __BEGIN_DECLS # include <bits/waitflags.h> # include <bits/waitstatus.h> -# ifdef __USE_MISC - -/* Lots of hair to allow traditional BSD use of `union wait' - as well as POSIX.1 use of `int' for the status word. */ - -# if defined __GNUC__ && !defined __cplusplus -# define __WAIT_INT(status) \ - (__extension__ (((union { __typeof(status) __in; int __i; }) \ - { .__in = (status) }).__i)) -# else -# define __WAIT_INT(status) (*(int *) &(status)) -# endif - -/* This is the type of the argument to `wait'. The funky union - causes redeclarations with either `int *' or `union wait *' to be - allowed without complaint. __WAIT_STATUS_DEFN is the type used in - the actual function definitions. */ - -# if !defined __GNUC__ || __GNUC__ < 2 || defined __cplusplus -# define __WAIT_STATUS void * -# define __WAIT_STATUS_DEFN void * -# else -/* This works in GCC 2.6.1 and later. */ -typedef union - { - union wait *__uptr; - int *__iptr; - } __WAIT_STATUS __attribute__ ((__transparent_union__)); -# define __WAIT_STATUS_DEFN int * -# endif - -# else /* Don't use misc. */ - -# define __WAIT_INT(status) (status) -# define __WAIT_STATUS int * -# define __WAIT_STATUS_DEFN int * - -# endif /* Use misc. */ - /* Define the macros <sys/wait.h> also would define this way. */ -# define WEXITSTATUS(status) __WEXITSTATUS (__WAIT_INT (status)) -# define WTERMSIG(status) __WTERMSIG (__WAIT_INT (status)) -# define WSTOPSIG(status) __WSTOPSIG (__WAIT_INT (status)) -# define WIFEXITED(status) __WIFEXITED (__WAIT_INT (status)) -# define WIFSIGNALED(status) __WIFSIGNALED (__WAIT_INT (status)) -# define WIFSTOPPED(status) __WIFSTOPPED (__WAIT_INT (status)) +# define WEXITSTATUS(status) __WEXITSTATUS (status) +# define WTERMSIG(status) __WTERMSIG (status) +# define WSTOPSIG(status) __WSTOPSIG (status) +# define WIFEXITED(status) __WIFEXITED (status) +# define WIFSIGNALED(status) __WIFSIGNALED (status) +# define WIFSTOPPED(status) __WIFSTOPPED (status) # ifdef __WIFCONTINUED -# define WIFCONTINUED(status) __WIFCONTINUED (__WAIT_INT (status)) +# define WIFCONTINUED(status) __WIFCONTINUED (status) # endif #endif /* X/Open or XPG7 and <sys/wait.h> not included. */ |