407 lines
8.0 KiB
C
407 lines
8.0 KiB
C
/*-
|
|
* Copyright (c) 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Kenneth Almquist.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)show.c 8.3 (Berkeley) 5/4/95";
|
|
#endif
|
|
static const char rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif /* not lint */
|
|
|
|
#include <stdio.h>
|
|
#include <stdarg.h>
|
|
#include <errno.h>
|
|
|
|
#include "shell.h"
|
|
#include "parser.h"
|
|
#include "nodes.h"
|
|
#include "mystring.h"
|
|
#include "show.h"
|
|
|
|
|
|
#ifdef DEBUG
|
|
static void shtree(union node *, int, char *, FILE*);
|
|
static void shcmd(union node *, FILE *);
|
|
static void sharg(union node *, FILE *);
|
|
static void indent(int, char *, FILE *);
|
|
static void trstring(char *);
|
|
|
|
|
|
void
|
|
showtree(union node *n)
|
|
{
|
|
trputs("showtree called\n");
|
|
shtree(n, 1, NULL, stdout);
|
|
}
|
|
|
|
|
|
static void
|
|
shtree(union node *n, int ind, char *pfx, FILE *fp)
|
|
{
|
|
struct nodelist *lp;
|
|
char *s;
|
|
|
|
if (n == NULL)
|
|
return;
|
|
|
|
indent(ind, pfx, fp);
|
|
switch(n->type) {
|
|
case NSEMI:
|
|
s = "; ";
|
|
goto binop;
|
|
case NAND:
|
|
s = " && ";
|
|
goto binop;
|
|
case NOR:
|
|
s = " || ";
|
|
binop:
|
|
shtree(n->nbinary.ch1, ind, NULL, fp);
|
|
/* if (ind < 0) */
|
|
fputs(s, fp);
|
|
shtree(n->nbinary.ch2, ind, NULL, fp);
|
|
break;
|
|
case NCMD:
|
|
shcmd(n, fp);
|
|
if (ind >= 0)
|
|
putc('\n', fp);
|
|
break;
|
|
case NPIPE:
|
|
for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
|
|
shcmd(lp->n, fp);
|
|
if (lp->next)
|
|
fputs(" | ", fp);
|
|
}
|
|
if (n->npipe.backgnd)
|
|
fputs(" &", fp);
|
|
if (ind >= 0)
|
|
putc('\n', fp);
|
|
break;
|
|
default:
|
|
fprintf(fp, "<node type %d>", n->type);
|
|
if (ind >= 0)
|
|
putc('\n', fp);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
shcmd(union node *cmd, FILE *fp)
|
|
{
|
|
union node *np;
|
|
int first;
|
|
char *s;
|
|
int dftfd;
|
|
|
|
first = 1;
|
|
for (np = cmd->ncmd.args ; np ; np = np->narg.next) {
|
|
if (! first)
|
|
putchar(' ');
|
|
sharg(np, fp);
|
|
first = 0;
|
|
}
|
|
for (np = cmd->ncmd.redirect ; np ; np = np->nfile.next) {
|
|
if (! first)
|
|
putchar(' ');
|
|
switch (np->nfile.type) {
|
|
case NTO: s = ">"; dftfd = 1; break;
|
|
case NAPPEND: s = ">>"; dftfd = 1; break;
|
|
case NTOFD: s = ">&"; dftfd = 1; break;
|
|
case NCLOBBER: s = ">|"; dftfd = 1; break;
|
|
case NFROM: s = "<"; dftfd = 0; break;
|
|
case NFROMTO: s = "<>"; dftfd = 0; break;
|
|
case NFROMFD: s = "<&"; dftfd = 0; break;
|
|
default: s = "*error*"; dftfd = 0; break;
|
|
}
|
|
if (np->nfile.fd != dftfd)
|
|
fprintf(fp, "%d", np->nfile.fd);
|
|
fputs(s, fp);
|
|
if (np->nfile.type == NTOFD || np->nfile.type == NFROMFD) {
|
|
fprintf(fp, "%d", np->ndup.dupfd);
|
|
} else {
|
|
sharg(np->nfile.fname, fp);
|
|
}
|
|
first = 0;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
sharg(union node *arg, FILE *fp)
|
|
{
|
|
char *p;
|
|
struct nodelist *bqlist;
|
|
int subtype;
|
|
|
|
if (arg->type != NARG) {
|
|
printf("<node type %d>\n", arg->type);
|
|
fflush(stdout);
|
|
abort();
|
|
}
|
|
bqlist = arg->narg.backquote;
|
|
for (p = arg->narg.text ; *p ; p++) {
|
|
switch (*p) {
|
|
case CTLESC:
|
|
putc(*++p, fp);
|
|
break;
|
|
case CTLVAR:
|
|
putc('$', fp);
|
|
putc('{', fp);
|
|
subtype = *++p;
|
|
if (subtype == VSLENGTH)
|
|
putc('#', fp);
|
|
|
|
while (*p != '=')
|
|
putc(*p++, fp);
|
|
|
|
if (subtype & VSNUL)
|
|
putc(':', fp);
|
|
|
|
switch (subtype & VSTYPE) {
|
|
case VSNORMAL:
|
|
putc('}', fp);
|
|
break;
|
|
case VSMINUS:
|
|
putc('-', fp);
|
|
break;
|
|
case VSPLUS:
|
|
putc('+', fp);
|
|
break;
|
|
case VSQUESTION:
|
|
putc('?', fp);
|
|
break;
|
|
case VSASSIGN:
|
|
putc('=', fp);
|
|
break;
|
|
case VSTRIMLEFT:
|
|
putc('#', fp);
|
|
break;
|
|
case VSTRIMLEFTMAX:
|
|
putc('#', fp);
|
|
putc('#', fp);
|
|
break;
|
|
case VSTRIMRIGHT:
|
|
putc('%', fp);
|
|
break;
|
|
case VSTRIMRIGHTMAX:
|
|
putc('%', fp);
|
|
putc('%', fp);
|
|
break;
|
|
case VSLENGTH:
|
|
break;
|
|
default:
|
|
printf("<subtype %d>", subtype);
|
|
}
|
|
break;
|
|
case CTLENDVAR:
|
|
putc('}', fp);
|
|
break;
|
|
case CTLBACKQ:
|
|
case CTLBACKQ|CTLQUOTE:
|
|
putc('$', fp);
|
|
putc('(', fp);
|
|
shtree(bqlist->n, -1, NULL, fp);
|
|
putc(')', fp);
|
|
break;
|
|
default:
|
|
putc(*p, fp);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
indent(int amount, char *pfx, FILE *fp)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0 ; i < amount ; i++) {
|
|
if (pfx && i == amount - 1)
|
|
fputs(pfx, fp);
|
|
putc('\t', fp);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Debugging stuff.
|
|
*/
|
|
|
|
|
|
FILE *tracefile;
|
|
|
|
#if DEBUG == 2
|
|
int debug = 1;
|
|
#else
|
|
int debug = 0;
|
|
#endif
|
|
|
|
|
|
void
|
|
trputc(int c)
|
|
{
|
|
if (tracefile == NULL)
|
|
return;
|
|
putc(c, tracefile);
|
|
if (c == '\n')
|
|
fflush(tracefile);
|
|
}
|
|
|
|
|
|
void
|
|
sh_trace(const char *fmt, ...)
|
|
{
|
|
va_list va;
|
|
va_start(va, fmt);
|
|
if (tracefile != NULL) {
|
|
(void) vfprintf(tracefile, fmt, va);
|
|
if (strchr(fmt, '\n'))
|
|
(void) fflush(tracefile);
|
|
}
|
|
va_end(va);
|
|
}
|
|
|
|
|
|
void
|
|
trputs(char *s)
|
|
{
|
|
if (tracefile == NULL)
|
|
return;
|
|
fputs(s, tracefile);
|
|
if (strchr(s, '\n'))
|
|
fflush(tracefile);
|
|
}
|
|
|
|
|
|
static void
|
|
trstring(char *s)
|
|
{
|
|
char *p;
|
|
char c;
|
|
|
|
if (tracefile == NULL)
|
|
return;
|
|
putc('"', tracefile);
|
|
for (p = s ; *p ; p++) {
|
|
switch (*p) {
|
|
case '\n': c = 'n'; goto backslash;
|
|
case '\t': c = 't'; goto backslash;
|
|
case '\r': c = 'r'; goto backslash;
|
|
case '"': c = '"'; goto backslash;
|
|
case '\\': c = '\\'; goto backslash;
|
|
case CTLESC: c = 'e'; goto backslash;
|
|
case CTLVAR: c = 'v'; goto backslash;
|
|
case CTLVAR+CTLQUOTE: c = 'V'; goto backslash;
|
|
case CTLBACKQ: c = 'q'; goto backslash;
|
|
case CTLBACKQ+CTLQUOTE: c = 'Q'; goto backslash;
|
|
backslash: putc('\\', tracefile);
|
|
putc(c, tracefile);
|
|
break;
|
|
default:
|
|
if (*p >= ' ' && *p <= '~')
|
|
putc(*p, tracefile);
|
|
else {
|
|
putc('\\', tracefile);
|
|
putc(*p >> 6 & 03, tracefile);
|
|
putc(*p >> 3 & 07, tracefile);
|
|
putc(*p & 07, tracefile);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
putc('"', tracefile);
|
|
}
|
|
|
|
|
|
void
|
|
trargs(char **ap)
|
|
{
|
|
if (tracefile == NULL)
|
|
return;
|
|
while (*ap) {
|
|
trstring(*ap++);
|
|
if (*ap)
|
|
putc(' ', tracefile);
|
|
else
|
|
putc('\n', tracefile);
|
|
}
|
|
fflush(tracefile);
|
|
}
|
|
|
|
|
|
void
|
|
opentrace(void)
|
|
{
|
|
char s[100];
|
|
char *getenv();
|
|
#ifdef O_APPEND
|
|
int flags;
|
|
#endif
|
|
|
|
if (!debug)
|
|
return;
|
|
#ifdef not_this_way
|
|
{
|
|
char *p;
|
|
if ((p = getenv("HOME")) == NULL) {
|
|
if (geteuid() == 0)
|
|
p = "/";
|
|
else
|
|
p = "/tmp";
|
|
}
|
|
scopy(p, s);
|
|
strcat(s, "/trace");
|
|
}
|
|
#else
|
|
scopy("./trace", s);
|
|
#endif /* not_this_way */
|
|
if ((tracefile = fopen(s, "a")) == NULL) {
|
|
fprintf(stderr, "Can't open %s: %s\n", s, strerror(errno));
|
|
return;
|
|
}
|
|
#ifdef O_APPEND
|
|
if ((flags = fcntl(fileno(tracefile), F_GETFL, 0)) >= 0)
|
|
fcntl(fileno(tracefile), F_SETFL, flags | O_APPEND);
|
|
#endif
|
|
fputs("\nTracing started.\n", tracefile);
|
|
fflush(tracefile);
|
|
}
|
|
#endif /* DEBUG */
|