Check return values of functions declared with warn_unused_result

attribute in GLIBC 2.8.
* cli/cli-cmds.c (pwd_command): Check return value from getcwd.
* inflow.c (check_syscall): New function.
(new_tty): Use check_syscall to check return values from open and dup.
* linux-nat.c (linux_nat_info_proc_cmd): Check return value from fgets.
* main.c (captured_main): Call cwd after setting up gdb_stderr;
check for errors from getcwd.
* mi/mi-cmd-env.c (mi_cmd_env_pwd): Check return value from getcwd.
* ui-file.c (stdio_file_write): Ignore return value from fwrite.
(stdio_file_fputs): Same.
* utils.c (internal_vproblem): abort if last-ditch error message
write fails.

1 files changed, 4 insertions, 1 deletions

diff --git a/gdb/mi/mi-cmd-env.c b/gdb/mi/mi-cmd-env.c
index b40fac4..cbc9bdb 100644
--- a/gdb/mi/mi-cmd-env.c
+++ b/gdb/mi/mi-cmd-env.c
@@ -79,7 +79,10 @@ mi_cmd_env_pwd (char *command, char **argv, int argc)
      
   /* Otherwise the mi level is 2 or higher.  */
 
-  getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
+  if (! getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)))
+    error (_("mi_cmd_env_pwd: error finding name of working directory: %s"),
+           safe_strerror (errno));
+    
   ui_out_field_string (uiout, "cwd", gdb_dirbuf);
 }