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Merge branch '4198_hang_on_start_with_zsh'

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* 4198_hang_on_start_with_zsh:
  Ticket #4198: MC hangs on start randomly with zsh as subshell.
This commit is contained in:
Andrew Borodin 2021-07-11 20:59:57 +03:00
commit 0c04e23821
1 changed files with 30 additions and 18 deletions
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46
src/subshell/common.c
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@ -201,11 +201,6 @@ static int subshell_ready;
/* Flag to indicate if the subshell supports the persistent buffer feature. */
static gboolean use_persistent_buffer = FALSE;
/* Flag to indicate if the contents of the subshell command line need to be cleared before */
/* executing a command. This should only end up set to true if there is some sort of error. */
/* This allows us to recover gracefully from an error. */
static gboolean subshell_should_clear_command_line = FALSE;
/* This is the local variable where the subshell prompt is stored while we are working on it. */
static GString *subshell_prompt_temp_buffer = NULL;
@ -752,10 +747,9 @@ feed_subshell (int how, gboolean fail_on_error)
struct timeval *wptr;
should_read_new_subshell_prompt = FALSE;
subshell_should_clear_command_line = FALSE;
/* we wait up to 10 seconds if fail_on_error, forever otherwise */
wtime.tv_sec = 10;
/* we wait up to 1 second if fail_on_error, forever otherwise */
wtime.tv_sec = 1;
wtime.tv_usec = 0;
wptr = fail_on_error ? &wtime : NULL;
@ -878,9 +872,17 @@ feed_subshell (int how, gboolean fail_on_error)
if (subshell_ready && !read_command_line_buffer (FALSE))
{
/* If we got here, some unforseen error must have occurred. */
if (mc_global.shell->type != SHELL_FISH)
{
write_all (mc_global.tty.subshell_pty, "\003", 1);
subshell_state = RUNNING_COMMAND;
if (feed_subshell (QUIETLY, TRUE))
if (read_command_line_buffer (FALSE))
return TRUE;
}
subshell_state = ACTIVE;
flush_subshell (0, VISIBLY);
input_assign_text (cmdline, "");
subshell_should_clear_command_line = TRUE;
}
}
@ -1455,15 +1457,17 @@ invoke_subshell (const char *command, int how, vfs_path_t ** new_dir_vpath)
/* data is there, but only if we are using one of the shells that */
/* doesn't support keeping command buffer contents, OR if there was */
/* some sort of error. */
if (!use_persistent_buffer || subshell_should_clear_command_line)
if (!use_persistent_buffer)
{
/* We don't need to call feed_subshell here if we are using fish, because of a
* quirk in the behavior of that particular shell. */
if (mc_global.shell->type != SHELL_FISH)
{
write_all (mc_global.tty.subshell_pty, "\003", 1);
subshell_state = RUNNING_COMMAND;
/* We need to call feed_subshell here if we are using fish, because of a quirk
* in the behavioral of that particular shell. */
if (mc_global.shell->type != SHELL_FISH)
feed_subshell (QUIETLY, FALSE);
}
}
if (how == QUIETLY)
write_all (mc_global.tty.subshell_pty, " ", 1);
@ -1667,12 +1671,16 @@ do_subshell_chdir (const vfs_path_t * vpath, gboolean update_prompt)
/* If we are using a shell that doesn't support persistent command buffer, we need to clear
* the command prompt before we send the cd command. */
if (!use_persistent_buffer || subshell_should_clear_command_line)
if (!use_persistent_buffer)
{
write_all (mc_global.tty.subshell_pty, "\003", 1);
subshell_state = RUNNING_COMMAND;
if (mc_global.shell->type != SHELL_FISH)
feed_subshell (QUIETLY, FALSE);
if (!feed_subshell (QUIETLY, TRUE))
{
subshell_state = ACTIVE;
return;
}
}
/* The initial space keeps this out of the command history (in bash
because we set "HISTCONTROL=ignorespace") */
@ -1703,7 +1711,11 @@ do_subshell_chdir (const vfs_path_t * vpath, gboolean update_prompt)
write_all (mc_global.tty.subshell_pty, "\n", 1);
subshell_state = RUNNING_COMMAND;
feed_subshell (QUIETLY, FALSE);
if (!feed_subshell (QUIETLY, TRUE))
{
subshell_state = ACTIVE;
return;
}
if (subshell_alive)
{
@ -1745,7 +1757,7 @@ do_subshell_chdir (const vfs_path_t * vpath, gboolean update_prompt)
* type a space and press return. */
write_all (mc_global.tty.subshell_pty, " \n", 2);
subshell_state = RUNNING_COMMAND;
feed_subshell (QUIETLY, FALSE);
feed_subshell (QUIETLY, TRUE);
}
update_subshell_prompt = FALSE;