From 947d39462e26b0edee9b58003ea579552dbf4fa8 Mon Sep 17 00:00:00 2001 From: Philippe Waroquiers Date: Sat, 20 Apr 2019 14:14:23 +0200 Subject: Implement | (pipe) command. The pipe command allows to run a GDB command, and pipe its output to a shell command: (gdb) help pipe Send the output of a gdb command to a shell command. Usage: | [COMMAND] | SHELL_COMMAND Usage: | -d DELIM COMMAND DELIM SHELL_COMMAND Usage: pipe [COMMAND] | SHELL_COMMAND Usage: pipe -d DELIM COMMAND DELIM SHELL_COMMAND Executes COMMAND and sends its output to SHELL_COMMAND. The -d option indicates to use the string DELIM to separate COMMAND from SHELL_COMMAND, in alternative to |. This is useful in case COMMAND contains a | character. With no COMMAND, repeat the last executed command and send its output to SHELL_COMMAND. (gdb) For example: (gdb) pipe print some_data_structure | grep -B3 -A3 something The pipe character is defined as an alias for pipe command, so that the above can be typed as: (gdb) | print some_data_structure | grep -B3 -A3 something If no GDB COMMAND is given, then the previous command is relaunched, and its output is sent to the given SHELL_COMMAND. This also defines convenience vars $_shell_exitcode and $_shell_exitsignal to record the exit code and exit signal of the last shell command launched by GDB e.g. by "shell", "pipe", ... gdb/ChangeLog 2019-05-31 Philippe Waroquiers * cli/cli-cmds.c (pipe_command): New function. (_initialize_cli_cmds): Call add_com for pipe_command. Define | as an alias for pipe. (exit_status_set_internal_vars): New function. (shell_escape): Call exit_status_set_internal_vars. cli/cli-decode.c (find_command_name_length): Recognize | as a single character command. --- gdb/cli/cli-decode.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'gdb/cli/cli-decode.c') diff --git a/gdb/cli/cli-decode.c b/gdb/cli/cli-decode.c index 72e2a97..e3076f2 100644 --- a/gdb/cli/cli-decode.c +++ b/gdb/cli/cli-decode.c @@ -1311,9 +1311,9 @@ find_command_name_length (const char *text) Note that this is larger than the character set allowed when creating user-defined commands. */ - /* Recognize '!' as a single character command so that, e.g., "!ls" + /* Recognize the single character commands so that, e.g., "!ls" works as expected. */ - if (*p == '!') + if (*p == '!' || *p == '|') return 1; while (isalnum (*p) || *p == '-' || *p == '_' -- cgit v1.1