Implement "set cwd" command on GDB

[deliverable/binutils-gdb.git] / gdb / nat / fork-inferior.c

diff --git a/gdb/nat/fork-inferior.c b/gdb/nat/fork-inferior.c
index 6ff119768c2358dc286ea937f93d9f812d791520..ee1340b8323f74700b898eb85f971340e7e054a4 100644 (file)
--- a/gdb/nat/fork-inferior.c
+++ b/gdb/nat/fork-inferior.c
@@ -25,6 +25,7 @@
 #include "common-inferior.h"
 #include "common-gdbthread.h"
 #include "signals-state-save-restore.h"
+#include "gdb_tilde_expand.h"
 #include <vector>
 
 extern char **environ;
@@ -298,6 +299,8 @@ fork_inferior (const char *exec_file_arg, const std::string &allargs,
   char **save_our_env;
   int i;
   int save_errno;
+  const char *inferior_cwd;
+  std::string expanded_inferior_cwd;
 
   /* If no exec file handed to us, get it from the exec-file command
      -- with a good, common error message if none is specified.  */
@@ -339,6 +342,18 @@ fork_inferior (const char *exec_file_arg, const std::string &allargs,
      the parent and child flushing the same data after the fork.  */
   gdb_flush_out_err ();
 
+  /* Check if the user wants to set a different working directory for
+     the inferior.  */
+  inferior_cwd = get_inferior_cwd ();
+
+  if (inferior_cwd != NULL)
+    {
+      /* Expand before forking because between fork and exec, the child
+        process may only execute async-signal-safe operations.  */
+      expanded_inferior_cwd = gdb_tilde_expand (inferior_cwd);
+      inferior_cwd = expanded_inferior_cwd.c_str ();
+    }
+
   /* If there's any initialization of the target layers that must
      happen to prepare to handle the child we're about fork, do it
      now...  */
@@ -374,6 +389,14 @@ fork_inferior (const char *exec_file_arg, const std::string &allargs,
         UIs.  */
       close_most_fds ();
 
+      /* Change to the requested working directory if the user
+        requested it.  */
+      if (inferior_cwd != NULL)
+       {
+         if (chdir (inferior_cwd) < 0)
+           trace_start_error_with_name (inferior_cwd);
+       }
+
       if (debug_fork)
        sleep (debug_fork);