vim-patch:8.2.3041: detecting if the process of a swap file is running fails

Problem:    Detecting if the process of a swap file is running fails if the
            process is owned by another user.
Solution:   Check for the ESRCH error. (closes vim/vim#8436)

https://github.com/vim/vim/commit/44dea9da4b2a21dd1e03f2bd94b4f2679d4613e5

Co-authored-by: Bram Moolenaar <Bram@vim.org>

1 files changed, 12 insertions, 1 deletions

diff --git a/src/nvim/os/process.c b/src/nvim/os/process.c
index d9273e69da..f4d95e141b 100644
--- a/src/nvim/os/process.c
+++ b/src/nvim/os/process.c
@@ -264,5 +264,16 @@ Dictionary os_proc_info(int pid)
 /// Return true if process `pid` is running.
 bool os_proc_running(int pid)
 {
-  return uv_kill(pid, 0) == 0;
+  int err = uv_kill(pid, 0);
+  // If there is no error the process must be running.
+  if (err == 0) {
+    return true;
+  }
+  // If the error is ESRCH then the process is not running.
+  if (err == UV_ESRCH) {
+    return false;
+  }
+  // If the process is running and owned by another user we get EPERM.  With
+  // other errors the process might be running, assuming it is then.
+  return true;
 }