mirror of https://git.tukaani.org/xz.git
61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
///////////////////////////////////////////////////////////////////////////////
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//
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/// \file main.h
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/// \brief Miscellanous declarations
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//
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// Copyright (C) 2008 Lasse Collin
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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///////////////////////////////////////////////////////////////////////////////
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#ifndef MAIN_H
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#define MAIN_H
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/// Possible exit status values. These are the same as used by gzip and bzip2.
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enum exit_status_type {
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E_SUCCESS = 0,
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E_ERROR = 1,
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E_WARNING = 2,
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};
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/// If this is true, we will clean up the possibly incomplete output file,
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/// return to main() as soon as practical. That is, the code needs to poll
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/// this variable in various places.
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extern volatile sig_atomic_t user_abort;
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/// Block the signals which don't have SA_RESTART and which would just set
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/// user_abort to true. This is handy when we don't want to handle EINTR
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/// and don't want SA_RESTART either.
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extern void signals_block(void);
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/// Unblock the signals blocked by signals_block().
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extern void signals_unblock(void);
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/// Sets the exit status after a warning or error has occurred. If new_status
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/// is EX_WARNING and the old exit status was already EX_ERROR, the exit
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/// status is not changed.
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extern void set_exit_status(enum exit_status_type new_status);
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/// Exits the program using the given status. This takes care of closing
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/// stdin, stdout, and stderr and catches possible errors. If we had got
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/// a signal, this function will raise it so that to the parent process it
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/// appears that we were killed by the signal sent by the user.
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extern void my_exit(enum exit_status_type status) lzma_attribute((noreturn));
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#endif
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