LibC: Fix execvp() errno

Of course, using dbg() in the middle will change errno (most likely, reset
it to zero).

1 files changed, 3 insertions, 1 deletions

diff --git a/Libraries/LibC/unistd.cpp b/Libraries/LibC/unistd.cpp
index 03c44bd060..da52fa5fd4 100644
--- a/Libraries/LibC/unistd.cpp
+++ b/Libraries/LibC/unistd.cpp
@@ -135,7 +135,9 @@ int execvpe(const char* filename, char* const argv[], char* const envp[])
 int execvp(const char* filename, char* const argv[])
 {
     int rc = execvpe(filename, argv, environ);
-    dbg() << "execvp() about to return " << rc << " with errno=" << errno;
+    int saved_errno = errno;
+    dbg() << "execvp() about to return " << rc << " with errno=" << saved_errno;
+    errno = saved_errno;
     return rc;
 }