[pulseaudio-discuss] [PATCH] util: Try finding out application name using dladdr if available
Felipe Sateler
fsateler at debian.org
Fri Oct 10 21:19:16 PDT 2014
This fixes getting the binary name in the Hurd, or any other port using
the GNU C library, but only in the case where the library is directly
linked to. Opening with dlopen will not work.
Change in v3: reorder header includes and definitions
Change in v2: use a weak reference to main, so that we
don't crash when main cannot be found.
---
configure.ac | 2 ++
src/pulse/util.c | 23 +++++++++++++++++++++++
2 files changed, 25 insertions(+)
diff --git a/configure.ac b/configure.ac
index f13ddb0..74bea71 100644
--- a/configure.ac
+++ b/configure.ac
@@ -580,6 +580,8 @@ AC_SYS_LARGEFILE
# Check for open64 to know if the current system does have open64() and similar functions
AC_CHECK_FUNCS_ONCE([open64])
+AC_SEARCH_LIBS([dladdr], [dl], [HAVE_DLADDR=1], [HAVE_DLADDR=0])
+AC_DEFINE(HAVE_DLADDR, [1], [Have dladdr?])
###################################
# External libraries #
diff --git a/src/pulse/util.c b/src/pulse/util.c
index ace698c..bc1ef8d 100644
--- a/src/pulse/util.c
+++ b/src/pulse/util.c
@@ -33,6 +33,15 @@
#include <unistd.h>
#include <sys/types.h>
+#if defined(HAVE_DLADDR) && defined(PA_GCC_WEAKREF)
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE 1
+#endif
+#include <dlfcn.h>
+
+static int _main() PA_GCC_WEAKREF(main);
+#endif
+
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
@@ -218,6 +227,20 @@ char *pa_get_binary_name(char *s, size_t l) {
}
#endif
+#if defined(HAVE_DLADDR) && defined(PA_GCC_WEAKREF)
+ {
+ Dl_info info;
+ if(_main) {
+ int err = dladdr(&_main, &info);
+ if (err != 0) {
+ char *p = pa_realpath(info.dli_fname);
+ if (p)
+ return p;
+ }
+ }
+ }
+#endif
+
#if defined(HAVE_SYS_PRCTL_H) && defined(PR_GET_NAME)
{
--
2.1.1
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