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Refactor code to check for terminal sharing

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This refactors the code to check for terminal sharing.
is_gdb_terminal is exported, and sharing_input_terminal_1 is renamed,
slightly refactored, and moved to posix-hdep.c.  A new
Windows-specific implementation of this function is added to
mingw-hdep.c.

MSDN has a warning about GetConsoleProcessList

    This API is not recommended and does not have a virtual terminal
    equivalent. [...] Applications remoting via cross-platform
    utilities and transports like SSH may not work as expected if
    using this API.

However, we believe this isn't likely to be an issue for gdb.
This commit is contained in:
Tom Tromey
2022-12-05 11:15:09 -07:00
parent d2f803afd5
commit c1dc47f53c
4 changed files with 63 additions and 26 deletions
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11
gdb/inferior.h
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@ -167,6 +167,17 @@ extern void default_print_float_info (struct gdbarch *gdbarch,
frame_info_ptr frame,
const char *args);
/* Try to determine whether TTY is GDB's input terminal. Returns
TRIBOOL_UNKNOWN if we can't tell. */
extern tribool is_gdb_terminal (const char *tty);
/* Helper for sharing_input_terminal. Try to determine whether pid
PID is using the same TTY for input as GDB is. Returns
TRIBOOL_UNKNOWN if we can't tell. */
extern tribool sharing_input_terminal (int pid);
extern void child_terminal_info (struct target_ops *self, const char *, int);
extern void child_terminal_ours (struct target_ops *self);