From: Bryan Drewery <br...@shatow.net>
FreeBSD has had this patch against Rust's bundled libbacktrace for a
while which allows not having /proc mounted to get the process name.
I am open to refactoring this if there's a better place to handle
some of this, such as configure.ac or a bsd-compat.c file.
Authored by: Jan Beich <jbe...@freebsd.org>
---
libbacktrace/fileline.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git libbacktrace/fileline.c libbacktrace/fileline.c
index e5673068379..6d56f89cfa9 100644
--- libbacktrace/fileline.c
+++ libbacktrace/fileline.c
@@ -39,9 +39,40 @@ POSSIBILITY OF SUCH DAMAGE. */
#include <stdlib.h>
#include <unistd.h>
+#if defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__)
+#include <sys/sysctl.h>
+#include <limits.h>
+#endif
+
#include "backtrace.h"
#include "internal.h"
+#if !defined(HAVE_GETEXECNAME) && defined(KERN_PROC_PATHNAME)
+/* Return pathname of executable or 0 on failure. */
+#define HAVE_GETEXECNAME
+static char execname[PATH_MAX + 1];
+static const char *
+getexecname(void)
+{
+ size_t path_len = sizeof(execname);
+ int mib[] = {
+ CTL_KERN,
+#if defined(__NetBSD__)
+ KERN_PROC_ARGS,
+ -1,
+ KERN_PROC_PATHNAME,
+#else
+ KERN_PROC,
+ KERN_PROC_PATHNAME,
+ -1,
+#endif
+ };
+ u_int miblen = sizeof(mib) / sizeof(mib[0]);
+ int rc = sysctl(mib, miblen, execname, &path_len, NULL, 0);
+ return rc ? NULL : execname;
+}
+#endif /* !HAVE_GETEXECNAME && KERN_PROC_PATHNAME */
+
#ifndef HAVE_GETEXECNAME
#define getexecname() NULL
#endif
--
2.16.2
