DEBUG mode shell update (changes nothing for shells which are not
compiled for DEBUG.) Add debug builtin command, and corresponding -D command line option. As usual, for DEBUG related stuff, read the source for info, that's all there is about this. This completes the infrastructure changes for the updated DEBUG TRACE mechanism, so now converting the rest of the shell's internal tracing can happen as desired - piecemeal.
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kre
parent
455974806a
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@ -1,5 +1,5 @@
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#!/bin/sh -
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# $NetBSD: builtins.def,v 1.24 2017/02/02 20:00:40 christos Exp $
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# $NetBSD: builtins.def,v 1.25 2017/05/15 20:00:36 kre Exp $
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#
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# Copyright (c) 1991, 1993
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# The Regents of the University of California. All rights reserved.
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@ -91,4 +91,8 @@ killcmd -u kill # mandated by posix for 'kill %job'
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wordexpcmd wordexp
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#newgrp -u newgrp # optional command in posix
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#ifdef DEBUG
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debugcmd debug
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#endif
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#exprcmd expr
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@ -1,4 +1,4 @@
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/* $NetBSD: options.c,v 1.46 2016/03/31 16:16:35 christos Exp $ */
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/* $NetBSD: options.c,v 1.47 2017/05/15 20:00:36 kre Exp $ */
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/*-
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* Copyright (c) 1991, 1993
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@ -37,7 +37,7 @@
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#if 0
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static char sccsid[] = "@(#)options.c 8.2 (Berkeley) 5/4/95";
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#else
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__RCSID("$NetBSD: options.c,v 1.46 2016/03/31 16:16:35 christos Exp $");
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__RCSID("$NetBSD: options.c,v 1.47 2017/05/15 20:00:36 kre Exp $");
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#endif
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#endif /* not lint */
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@ -194,6 +194,16 @@ options(int cmdline)
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minus_o(*argptr, val);
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if (*argptr)
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argptr++;
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#ifdef DEBUG
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} else if (c == 'D') {
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if (*p) {
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set_debug(p, val);
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break;
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} else if (*argptr)
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set_debug(*argptr++, val);
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else
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set_debug("*$", val);
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#endif
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} else {
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setoption(c, val);
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}
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127
bin/sh/show.c
127
bin/sh/show.c
@ -1,4 +1,4 @@
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/* $NetBSD: show.c,v 1.39 2017/05/13 03:26:03 kre Exp $ */
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/* $NetBSD: show.c,v 1.40 2017/05/15 20:00:36 kre Exp $ */
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/*-
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* Copyright (c) 1991, 1993
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@ -39,7 +39,7 @@
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#if 0
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static char sccsid[] = "@(#)show.c 8.3 (Berkeley) 5/4/95";
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#else
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__RCSID("$NetBSD: show.c,v 1.39 2017/05/13 03:26:03 kre Exp $");
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__RCSID("$NetBSD: show.c,v 1.40 2017/05/15 20:00:36 kre Exp $");
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#endif
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#endif /* not lint */
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@ -49,6 +49,7 @@ __RCSID("$NetBSD: show.c,v 1.39 2017/05/13 03:26:03 kre Exp $");
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <limits.h>
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#include <sys/types.h>
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#include <sys/uio.h>
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@ -61,6 +62,9 @@ __RCSID("$NetBSD: show.c,v 1.39 2017/05/13 03:26:03 kre Exp $");
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#include "options.h"
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#include "redir.h"
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#include "error.h"
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#include "syntax.h"
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#include "output.h"
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#include "builtins.h"
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#if defined(DEBUG) && !defined(DBG_PID)
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/*
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@ -106,7 +110,7 @@ TFILE tracedata, *tracetfile;
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FILE *tracefile; /* just for histedit */
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uint64_t DFlags; /* currently enabled debug flags */
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int ShNest; /* depth of shell (internal) nesting */
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int ShNest; /* depth of shell (internal) nesting */
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static void shtree(union node *, int, int, int, TFILE *);
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static void shcmd(union node *, TFILE *);
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@ -1015,4 +1019,121 @@ trace_fd_swap(int from, int to)
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setlinebuf(tracefile);
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}
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static struct debug_flag {
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char label;
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uint64_t flag;
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} debug_flags[] = {
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{ 'a', DBG_ARITH }, /* arithmetic ( $(( )) ) */
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{ 'c', DBG_CMDS }, /* command searching, ... */
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{ 'e', DBG_EVAL }, /* evaluation of the parse tree */
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{ 'f', DBG_REDIR }, /* file descriptors & redirections */
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{ 'h', DBG_HISTORY }, /* history & cmd line editing */
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{ 'i', DBG_INPUT }, /* shell input routines */
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{ 'j', DBG_JOBS }, /* job control, structures */
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{ 'm', DBG_MEM }, /* memory management */
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{ 'o', DBG_OUTPUT }, /* output routines */
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{ 'p', DBG_PROCS }, /* process management, fork, ... */
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{ 'r', DBG_PARSE }, /* parser, lexer, ... tree building */
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{ 's', DBG_SIG }, /* signals and everything related */
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{ 't', DBG_TRAP }, /* traps & signals */
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{ 'v', DBG_VARS }, /* variables and parameters */
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{ 'w', DBG_WAIT }, /* waits for processes to finish */
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{ 'x', DBG_EXPAND }, /* word expansion ${} $() $(( )) */
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{ 'z', DBG_ERRS }, /* error control, jumps, cleanup */
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{ '0', DBG_U0 }, /* ad-hoc temp debug flag #0 */
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{ '1', DBG_U1 }, /* ad-hoc temp debug flag #1 */
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{ '2', DBG_U2 }, /* ad-hoc temp debug flag #2 */
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{ '$', DBG_PID }, /* prefix trace lines with sh pid */
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{ '^', DBG_NEST }, /* show shell nesting level */
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/* alpha options only */
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{ '_', DBG_PARSE | DBG_EVAL | DBG_EXPAND | DBG_JOBS |
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DBG_PROCS | DBG_REDIR | DBG_CMDS | DBG_ERRS |
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DBG_WAIT | DBG_TRAP | DBG_VARS | DBG_MEM |
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DBG_INPUT | DBG_OUTPUT | DBG_ARITH | DBG_HISTORY },
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/* { '*', DBG_ALLVERBOSE }, is handled in the code */
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{ '#', DBG_U0 | DBG_U1 | DBG_U2 },
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{ 0, 0 }
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};
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void
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set_debug(const char * flags, int on)
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{
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char f;
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struct debug_flag *df;
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int verbose;
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while ((f = *flags++) != '\0') {
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verbose = 0;
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if (is_upper(f)) {
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verbose = 1;
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f += 'a' - 'A';
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}
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if (f == '*')
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f = '_', verbose = 1;
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if (f == '+') {
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if (*flags == '+')
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flags++, verbose=1;
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}
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/*
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* Note: turning on any debug option also enables DBG_ALWAYS
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* turning on any verbose option also enables DBG_VERBOSE
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* Once enabled, those flags cannot be disabled.
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* (tracing can still be turned off with "set +o debug")
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*/
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for (df = debug_flags; df->label != '\0'; df++) {
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if (f == '+' || df->label == f) {
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if (on) {
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DFlags |= DBG_ALWAYS | df->flag;
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if (verbose)
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DFlags |= DBG_VERBOSE |
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(df->flag << DBG_VBOSE_SHIFT);
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} else {
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DFlags &= ~(df->flag<<DBG_VBOSE_SHIFT);
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if (!verbose)
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DFlags &= ~df->flag;
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}
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}
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}
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}
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}
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int
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debugcmd(int argc, char **argv)
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{
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if (argc == 1) {
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struct debug_flag *df;
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for (df = debug_flags; df->label != '\0'; df++) {
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if (df->flag & (df->flag - 1))
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continue;
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if (is_alpha(df->label) &&
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(df->flag << DBG_VBOSE_SHIFT) & DFlags)
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out1c(df->label - ('a' - 'A'));
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else if (df->flag & DFlags)
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out1c(df->label);
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}
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out1c('\n');
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return 0;
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}
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while (*++argv) {
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if (**argv == '-')
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set_debug(*argv + 1, 1);
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else if (**argv == '+')
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set_debug(*argv + 1, 0);
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else
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return 1;
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}
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return 0;
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}
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#endif /* DEBUG */
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@ -1,4 +1,4 @@
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/* $NetBSD: syntax.h,v 1.6 2016/03/16 19:02:26 christos Exp $ */
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/* $NetBSD: syntax.h,v 1.7 2017/05/15 20:00:36 kre Exp $ */
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/*-
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* Copyright (c) 1991, 1993
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@ -69,6 +69,8 @@
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/* These defines assume that the digits are contiguous (which is guaranteed) */
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#define is_digit(c) ((unsigned)((c) - '0') <= 9)
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#define sh_ctype(c) (is_type+SYNBASE)[(int)(c)]
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#define is_upper(c) (sh_ctype(c) & ISUPPER)
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#define is_lower(c) (sh_ctype(c) & ISLOWER)
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#define is_alpha(c) (sh_ctype(c) & (ISUPPER|ISLOWER))
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#define is_name(c) (sh_ctype(c) & (ISUPPER|ISLOWER|ISUNDER))
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#define is_in_name(c) (sh_ctype(c) & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))
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