Add support for HP-UX

tested on: HP-UX 11.31 ia64,
               gcc 4.7.1(HP AllianceOne version)
               gcc 4.2.3(http://hpux.connect.org.uk)
	       HP C/aC++

HP-UX defaults to use LP32 and it treats long as 32 bit (= 4 bytes).
This build forces LP64 for treating long as 64 bit.

2 files changed, 29 insertions, 0 deletions

diff --git a/crypto/compat/arc4random.h b/crypto/compat/arc4random.h
index 53b5a46..ed812ba 100644
--- a/crypto/compat/arc4random.h
+++ b/crypto/compat/arc4random.h
@@ -6,6 +6,9 @@
 #if defined(__FreeBSD__)
 #include "arc4random_freebsd.h"
 
+#elif defined(__hpux)
+#include "arc4random_hpux.h"
+
 #elif defined(__linux__)
 #include "arc4random_linux.h"
 
diff --git a/crypto/compat/issetugid_hpux.c b/crypto/compat/issetugid_hpux.c
new file mode 100644
index 0000000..73def9b
--- /dev/null
+++ b/crypto/compat/issetugid_hpux.c
@@ -0,0 +1,26 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/pstat.h>
+
+/*
+ * HP-UX does not have issetugid().
+ * This experimental implementation uses pstat_getproc() and get*id().
+ * First, try pstat_getproc() and check PS_CHANGEDPRIV bit of pst_flag. 
+ * In case unsuccessful calling pstat_getproc(), using get*id().
+ *
+ */
+int issetugid(void)
+{
+        struct pst_status buf;
+        if(pstat_getproc(&buf, sizeof(buf), 0, getpid()) != 1) {
+            perror("pstat_getproc()");
+        } else {
+            if(buf.pst_flag & PS_CHANGEDPRIV)
+                return 1;
+        }
+        if(getuid() != geteuid())
+            return 1;
+        if(getgid() != getegid())
+            return 1;
+        return 0;
+}