XZ Utils 5.4.1
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Handling signals to abort operation. More...
#include "private.h"
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static void | signal_handler (int sig) |
void | signals_init (void) |
void | signals_block (void) |
void | signals_unblock (void) |
Unblock the signals blocked by signals_block(). More... | |
void | signals_exit (void) |
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volatile sig_atomic_t | user_abort = false |
static volatile sig_atomic_t | exit_signal = 0 |
static sigset_t | hooked_signals |
static bool | signals_are_initialized = false |
static size_t | signals_block_count = 0 |
signals_block() and signals_unblock() can be called recursively. More... | |
Handling signals to abort operation.
void signals_init | ( | void | ) |
Initialize the signal handler, which will set user_abort to true when user e.g. presses C-c.
References hooked_signals.
void signals_block | ( | void | ) |
Block the signals which don't have SA_RESTART and which would just set user_abort to true. This is handy when we don't want to handle EINTR and don't want SA_RESTART either.
References signals_are_initialized, and signals_block_count.
Referenced by io_open_dest(), and message_progress_update().
void signals_unblock | ( | void | ) |
Unblock the signals blocked by signals_block().
References signals_are_initialized.
void signals_exit | ( | void | ) |
If user has sent us a signal earlier to terminate the process, re-raise that signal to actually terminate the process.
References exit_signal, and set_exit_status().
volatile sig_atomic_t user_abort = false |
If this is true, we will clean up the possibly incomplete output file, return to main() as soon as practical. That is, the code needs to poll this variable in various places.
Referenced by coder_passthru(), and io_wait().
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If we were interrupted by a signal, we store the signal number so that we can raise that signal to kill the program when all cleanups have been done.
Referenced by signals_exit().
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Mask of signals for which we have established a signal handler to set user_abort to true.
Referenced by signals_init().
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True once signals_init() has finished. This is used to skip blocking signals (with uninitialized hooked_signals) if signals_block() and signals_unblock() are called before signals_init() has been called.
Referenced by signals_block(), and signals_unblock().
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signals_block() and signals_unblock() can be called recursively.
Referenced by signals_block().