patch 8.0.0450: v:progpath is not reliably set
Problem: v:progpath is not reliably set.
Solution: Read /proc/self/exe if possible. (idea by Michal Grochmal)
Also fixes missing #if.
diff --git a/src/main.c b/src/main.c
index f96bca9..aa5a1a2 100644
--- a/src/main.c
+++ b/src/main.c
@@ -3539,16 +3539,27 @@
{
char_u *val = argv0;
+# ifdef HAVE_PROC_SELF_EXE
+ char buf[PATH_MAX + 1];
+ ssize_t len;
+
+ len = readlink("/proc/self/exe", buf, PATH_MAX);
+ if (len > 0)
+ {
+ buf[len] = NUL;
+ val = (char_u *)buf;
+ }
+# else
/* A relative path containing a "/" will become invalid when using ":cd",
* turn it into a full path.
* On MS-Windows "vim" should be expanded to "vim.exe", thus always do
* this. */
-# ifdef WIN32
+# ifdef WIN32
char_u *path = NULL;
if (mch_can_exe(argv0, &path, FALSE) && path != NULL)
val = path;
-# else
+# else
char_u buf[MAXPATHL];
if (!mch_isFullName(argv0))