--- a/lib/getprogname.c	Sat Dec 31 07:54:41 CST 2016
+++ b/lib/getprogname.c	Thu Aug 22 17:48:57 CDT 2019
@@ -43,6 +43,14 @@
 # include <string.h>
 #endif
 
+#ifdef __sgi
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <sys/procfs.h>
+#endif
+
 #include "dirname.h"
 
 #ifndef HAVE_GETPROGNAME             /* not Mac OS X, FreeBSD, NetBSD, OpenBSD >= 5.4, Cygwin */
@@ -143,6 +151,32 @@
       free (buf.ps_pathptr);
     }
   return p;
+# elif __sgi
+  char filename[50];
+  int fd;
+
+  sprintf (filename, "/proc/pinfo/%d", (int) getpid());
+  fd = open(filename, O_RDONLY);
+  if (0 <= fd)
+  {
+    prpsinfo_t buf;
+    int ioctl_ok = 0 <= ioctl (fd, PIOCPSINFO, &buf);
+    close (fd);
+    if (ioctl_ok)
+    {
+      char *name = buf.pr_fname;
+      size_t namesize = sizeof buf.pr_fname;
+      char* namenul = memchr (name, '\0', namesize);
+      size_t namelen = namenul ? namenul - name : namesize;
+      char* namecopy = malloc(namelen+1);
+      if (namecopy)
+      {
+        namecopy[namelen] = 0;
+        return memcpy(namecopy, name, namelen);
+      }
+    }
+  }
+  return NULL;
 # else
 #  error "getprogname module not ported to this OS"
 # endif