sysconf.c _SC_SEM_XXX patch

[Pailloncy Jean-Gérard <pailloncy_(_at_)_gdr-isis_(_dot_)_enst_(_dot_)_fr>]

Hi,

I have wrote a very small patch to add _SC_SEM_NSEMS_MAX and 
_SC_SEM_VALUE_MAX to sysconf().
I apologize if it is not adequate.


diff -u unistd.old.h unistd.h
--- unistd.old.h        Fri May  7 01:05:12 2004
+++ unistd.h    Fri May  7 01:06:55 2004
@@ -119,6 +119,9 @@
 #define        _SC_FSYNC               29
 #define        _SC_XOPEN_SHM           30

+#define _SC_SEM_NSEMS_MAX      31
+#define _SC_SEM_VALUE_MAX      32
+
 #ifdef notyet
 /* P1003.1c */
 #define _SC_GETGR_R_SIZE_MAX


diff -u sysconf.old.c sysconf.c
--- sysconf.old.c       Fri May  7 00:03:45 2004
+++ sysconf.c   Fri May  7 00:25:27 2004
@@ -42,6 +42,7 @@
 #include <sys/sysctl.h>
 #include <sys/time.h>
 #include <sys/resource.h>
+#include <sys/sem.h>

 #include <errno.h>
 #include <unistd.h>
@@ -64,7 +65,7 @@
 {
        struct rlimit rl;
        size_t len;
-       int mib[2], value;
+       int mib[3], value;

        len = sizeof(value);

@@ -184,6 +185,18 @@
                mib[0] = CTL_USER;
                mib[1] = USER_POSIX2_UPE;
                goto yesno;
+
+/* SEM */
+       case _SC_SEM_NSEMS_MAX:
+               mib[0] = CTL_KERN;
+               mib[1] = KERN_SEMINFO;
+               mib[2] = KERN_SEMINFO_SEMMNS;
+               goto sem;
+       case _SC_SEM_VALUE_MAX:
+               mib[0] = CTL_KERN;
+               mib[1] = KERN_SEMINFO;
+               mib[2] = KERN_SEMINFO_SEMVMX;
+sem:   return (sysctl(mib, 3, &value, &len, NULL, 0) == -1 ? -1 : 
value);

 /* XPG 4.2 */
        case _SC_XOPEN_SHM:


Cordialement,
Jean-Gérard Pailloncy