From ab47993a00e8854d64ae90de0cdd4b9272653473 Mon Sep 17 00:00:00 2001
From: Tom Jones <thj@freebsd.org>
Date: Wed, 24 Apr 2024 10:30:20 +0000
Subject: vppinfra: Add method for getting current executable name

Add a unix method for getting the current executable name. This is
implemented to match the readlink api for existing calls.

Type: improvement
Change-Id: Id06a55892d09d0b305a56b55a424f53ffb685a72
Signed-off-by: Tom Jones <thj@freebsd.org>
Signed-off-by: Damjan Marion <damarion@cisco.com>
---
 src/vppinfra/unix-misc.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'src/vppinfra/unix-misc.c')

diff --git a/src/vppinfra/unix-misc.c b/src/vppinfra/unix-misc.c
index 4dbc5ce98ce..29cbe0a557d 100644
--- a/src/vppinfra/unix-misc.c
+++ b/src/vppinfra/unix-misc.c
@@ -42,6 +42,8 @@
 #include <vppinfra/format.h>
 #ifdef __linux__
 #include <vppinfra/linux/sysfs.h>
+#else
+#include <sys/sysctl.h>
 #endif
 
 #include <sys/stat.h>
@@ -358,6 +360,28 @@ os_get_cpu_phys_core_id (int cpu_id)
 #endif
 }
 
+__clib_export u8 *
+os_get_exec_path ()
+{
+  u8 *rv = 0;
+#ifdef __linux__
+  char tmp[PATH_MAX];
+  ssize_t sz = readlink ("/proc/self/exe", tmp, sizeof (tmp));
+
+  if (sz <= 0)
+    return 0;
+#else
+  char tmp[MAXPATHLEN];
+  int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
+  size_t sz = MAXPATHLEN;
+
+  if (sysctl (mib, 4, tmp, &sz, NULL, 0) == -1)
+    return 0;
+#endif
+  vec_add (rv, tmp, sz);
+  return rv;
+}
+
 /*
  * fd.io coding-style-patch-verification: ON
  *
-- 
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