rtlib: Implemented fb_hGetExePath for Solaris/SunOS

src/rtlib/solaris/sys_getexepath.c

@@ -0,0 +1,29 @@
+/* get the executable path */
+
+#include "../fb.h"
+#include <sys/stat.h>
+
+char *fb_hGetExePath( char *dst, ssize_t maxlen )
+{
+	char *p;
+	char linkname[1024];
+	struct stat finfo;
+	ssize_t len;
+
+	sprintf(linkname, "/proc/%lu/path/a.out", getpid());
+	if ((stat(linkname, &finfo) == 0) && ((len = readlink(linkname, dst, maxlen - 1)) > -1)) {
+		/* Solaris-like proc fs is available */
+		dst[len] = '\0';
+		p = strrchr(dst, '/');
+		if (p == dst) /* keep the "/" rather than returning "" */
+			*(p + 1) = '\0';
+		else if (p)
+			*p = '\0';
+		else
+			dst[0] = '\0';
+	} else {
+		p = NULL;
+	}
+
+	return p;
+}