| /* Close standard output and standard error, exiting with a diagnostic on error. |
| |
| Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004, 2006 Free |
| Software Foundation, Inc. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software Foundation, |
| Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
| |
| #include <config.h> |
| |
| #include "closeout.h" |
| |
| #include <errno.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| |
| #include "gettext.h" |
| #define _(msgid) gettext (msgid) |
| |
| #include "close-stream.h" |
| #include "error.h" |
| #include "exitfail.h" |
| #include "quotearg.h" |
| |
| static const char *file_name; |
| |
| /* Set the file name to be reported in the event an error is detected |
| by close_stdout. */ |
| void |
| close_stdout_set_file_name (const char *file) |
| { |
| file_name = file; |
| } |
| |
| /* Close standard output. On error, issue a diagnostic and _exit |
| with status 'exit_failure'. |
| |
| Also close standard error. On error, _exit with status 'exit_failure'. |
| |
| Since close_stdout is commonly registered via 'atexit', POSIX |
| and the C standard both say that it should not call 'exit', |
| because the behavior is undefined if 'exit' is called more than |
| once. So it calls '_exit' instead of 'exit'. If close_stdout |
| is registered via atexit before other functions are registered, |
| the other functions can act before this _exit is invoked. |
| |
| Applications that use close_stdout should flush any streams |
| other than stdout and stderr before exiting, since the call to |
| _exit will bypass other buffer flushing. Applications should |
| be flushing and closing other streams anyway, to check for I/O |
| errors. Also, applications should not use tmpfile, since _exit |
| can bypass the removal of these files. |
| |
| It's important to detect such failures and exit nonzero because many |
| tools (most notably `make' and other build-management systems) depend |
| on being able to detect failure in other tools via their exit status. */ |
| |
| void |
| close_stdout (void) |
| { |
| if (close_stream (stdout) != 0) |
| { |
| char const *write_error = _("write error"); |
| if (file_name) |
| error (0, errno, "%s: %s", quotearg_colon (file_name), |
| write_error); |
| else |
| error (0, errno, "%s", write_error); |
| |
| _exit (exit_failure); |
| } |
| |
| if (close_stream (stderr) != 0) |
| _exit (exit_failure); |
| } |