Glitch dlopen(3).

sippy · May 28, 2020 · e631ad5 · e631ad5
1 parent 23bfc7a
commit e631ad5
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diff --git a/src/rtpp_autoglitch.c b/src/rtpp_autoglitch.c
@@ -406,3 +406,35 @@ rtpp_glitch_mmap(void *addr, size_t len, int prot, int flags, int fd, off_t offs
     errno = ENOMEM;
     return (MAP_FAILED);
 }
+
+#include <dlfcn.h>
+
+#undef dlopen
+
+static const char *dlerp;
+
+void *
+rtpp_glitch_dlopen(const char *path, int mode, HERETYPEARG)
+{
+    GLITCH_INJECT(HEREARG, glitched);
+    dlerp = NULL;
+    return (dlopen(path, mode));
+glitched:
+    dlerp = "foo bar baz";
+    return (NULL);
+}
+
+#undef dlerror
+
+const char *
+rtpp_glitch_dlerror(HERETYPEARG)
+{
+
+    if (dlerp != NULL) {
+       const char *rval;
+       rval = dlerp;
+       dlerp = NULL;
+       return (rval);
+    }
+    return (dlerror());
+}
diff --git a/src/rtpp_autoglitch.h b/src/rtpp_autoglitch.h
@@ -255,4 +255,22 @@ void *rtpp_glitch_mmap(void *, size_t, int, int, int, off_t, HERETYPE);
 
 #define mmap(addr, len, prot, flags, fd, offset) rtpp_glitch_mmap(addr, len, prot, flags, fd, offset, HEREVAL)
 
+#include <dlfcn.h>
+
+void *rtpp_glitch_dlopen(const char *path, int mode, HERETYPE);
+
+#ifdef dlopen
+# undef dlopen
+#endif
+
+#define dlopen(path, mode) rtpp_glitch_dlopen(path, mode, HEREVAL)
+
+const char *rtpp_glitch_dlerror(HERETYPE);
+
+#ifdef dlerror
+# undef dlerror
+#endif
+
+#define dlerror() rtpp_glitch_dlerror(HEREVAL)
+
 #endif /* _RTPP_AUTOGLITCH_H */