cmd/csh/sh.err.c

/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*  Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley Software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include "sh.h"
#include <locale.h>
#include <dirent.h>
#include <string.h>
/*
 * #include <sys/ioctl.h>
 * #include <stdlib.h>
 */
#include "sh.tconst.h"
/*
 * C Shell
 */


bool    errspl;         /* Argument to error was spliced by seterr2 */
tchar one[2] = { '1', 0 };
tchar *onev[2] = { one, NOSTR };
/*
 *    contains DIR * for last opendir_(), its left open if an error
 *    longjmp (reset) occurs before it gets closed via closedir.
 *    if its not null in the error handler, then closedir it.
 */
DIR *Dirp = NULL;

/*
 * Print error string s with optional argument arg.
 * This routine always resets or exits.  The flag haderr
 * is set so the routine who catches the unwind can propogate
 * it if they want.
 *
 * Note that any open files at the point of error will eventually
 * be closed in the routine process in sh.c which is the only
 * place error unwinds are ever caught.
 */
/*VARARGS1*/
void
error(s, a1, a2)
     char   *s;
{
    tchar **v;
    char *ep;

    /*
     * Must flush before we print as we wish output before the error
     * to go on (some form of) standard output, while output after
     * goes on (some form of) diagnostic output.
     * If didfds then output will go to 1/2 else to FSHOUT/FSHDIAG.
     * See flush in sh.print.c.
     */
    flush();
    haderr = 1;     /* Now to diagnostic output */
    timflg = 0;     /* This isn't otherwise reset */
    if (v = pargv)
        pargv = 0, blkfree(v);
    if (v = gargv)
        gargv = 0, blkfree(v);

    /*
     * A zero arguments causes no printing, else print
     * an error diagnostic here.
     */
    if (s) {
            printf(s, a1, a2), printf("\n");
    }


    didfds = 0;     /* Forget about 0,1,2 */
    if ((ep = err) && errspl) {
        errspl = 0;
        xfree(ep);
    }
    errspl = 0;

    if ( Dirp ){
        closedir(Dirp);
        Dirp = NULL;
    }

    /*
     * Go away if -e or we are a child shell
     */
    if (exiterr || child) {
        exit(1);
    }

    /*
     * Reset the state of the input.
     * This buffered seek to end of file will also
     * clear the while/foreach stack.
     */
    btoeof();

    setq(S_status, onev, &shvhed);
    if (tpgrp > 0)
        (void) ioctl(FSHTTY, TIOCSPGRP,  (char *)&tpgrp);
    reset();        /* Unwind */
}

/*
 * Perror is the shells version of perror which should otherwise
 * never be called.
 */
void
Perror(tchar *s)
{
    char    chbuf[BUFSIZ];

    /*
     * Perror uses unit 2, thus if we didn't set up the fd's
     * we must set up unit 2 now else the diagnostic will disappear
     */
    if (!didfds) {
        int oerrno = errno;

        (void) dcopy(SHDIAG, 2);
        errno = oerrno;
    }
    tstostr(chbuf, s);
    perror(chbuf);
    error(NULL);        /* To exit or unwind */
}

void
bferr(char *cp)
{

    flush();
    haderr = 1;
    if( bname) printf("%t: ", bname);
    error("%s", gettext(cp));
}

/*
 * The parser and scanner set up errors for later by calling seterr,
 * which sets the variable err as a side effect; later to be tested,
 * e.g. in process.
 */
void
seterr(char *s)
{

    if (err == 0)
        err = s, errspl = 0;
}

/* Set err to a splice of cp and dp, to be freed later in error() */
void
seterr2(tchar *cp, char *dp)
{
    char    chbuf[BUFSIZ];
    char    *gdp;

    if (err)
        return;

    /* Concatinate cp and dp in the allocated space. */
    tstostr(chbuf, cp);
    gdp = gettext(dp);
    err = (char *)xalloc(strlen(chbuf)+strlen(gdp)+1);
    strcpy(err, chbuf);
    strcat(err, gdp);

    errspl++;/* Remember to xfree(err). */
}

/* Set err to a splice of cp with a string form of character d */
void
seterrc(char *cp, tchar d)
{
    char    chbuf[MB_LEN_MAX+1];

    /* don't overwrite an existing error message */
    if (err)
        return;

#ifdef MBCHAR
    {
    wchar_t wcd=(wchar_t)(d&TRIM);
    int i;

    i = wctomb(chbuf, wcd); /* chbuf holds d in multibyte representation. */
    chbuf[(i>0)?i:0] = (char) 0;
    }
#else
    chbuf[0]=(char)(d&TRIM); chbuf[1]=(char)0;
#endif


    /* Concatinate cp and d in the allocated space. */
    err = (char *)xalloc(strlen(cp)+strlen(chbuf)+1);
    strcpy(err, cp);
    strcat(err, chbuf);

    errspl++; /* Remember to xfree(err). */
}