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Annotation of 41BSD/cmd/csh/sh.err.c, revision 1.1

1.1     ! root        1: static char *sccsid = "@(#)sh.err.c 4.1 10/9/80";
        !             2: 
        !             3: #include "sh.h"
        !             4: #include <sys/ioctl.h>
        !             5: 
        !             6: /*
        !             7:  * C Shell
        !             8:  */
        !             9: 
        !            10: bool   errspl;                 /* Argument to error was spliced by seterr2 */
        !            11: char   one[2] = { '1', 0 };
        !            12: char   *onev[2] = { one, NOSTR };
        !            13: /*
        !            14:  * Print error string s with optional argument arg.
        !            15:  * This routine always resets or exits.  The flag haderr
        !            16:  * is set so the routine who catches the unwind can propogate
        !            17:  * it if they want.
        !            18:  *
        !            19:  * Note that any open files at the point of error will eventually
        !            20:  * be closed in the routine process in sh.c which is the only
        !            21:  * place error unwinds are ever caught.
        !            22:  */
        !            23: error(s, arg)
        !            24:        char *s;
        !            25: {
        !            26:        register char **v;
        !            27:        register char *ep;
        !            28: 
        !            29:        /*
        !            30:         * Must flush before we print as we wish output before the error
        !            31:         * to go on (some form of) standard output, while output after
        !            32:         * goes on (some form of) diagnostic output.
        !            33:         * If didfds then output will go to 1/2 else to FSHOUT/FSHDIAG.
        !            34:         * See flush in sh.print.c.
        !            35:         */
        !            36:        flush();
        !            37:        haderr = 1;             /* Now to diagnostic output */
        !            38:        timflg = 0;             /* This isn't otherwise reset */
        !            39:        if (v = pargv)
        !            40:                pargv = 0, blkfree(v);
        !            41:        if (v = gargv)
        !            42:                gargv = 0, blkfree(v);
        !            43: 
        !            44:        /*
        !            45:         * A zero arguments causes no printing, else print
        !            46:         * an error diagnostic here.
        !            47:         */
        !            48:        if (s)
        !            49:                printf(s, arg), printf(".\n");
        !            50: 
        !            51:        didfds = 0;             /* Forget about 0,1,2 */
        !            52:        if ((ep = err) && errspl) {
        !            53:                errspl = 0;
        !            54:                xfree(ep);
        !            55:        }
        !            56:        errspl = 0;
        !            57: 
        !            58:        /*
        !            59:         * Reset the state of the input.
        !            60:         * This buffered seek to end of file will also
        !            61:         * clear the while/foreach stack.
        !            62:         */
        !            63:        btoeof();
        !            64: 
        !            65:        /*
        !            66:         * Go away if -e or we are a child shell
        !            67:         */
        !            68:        if (exiterr || child)
        !            69:                exit(1);
        !            70: 
        !            71:        setq("status", onev, &shvhed);
        !            72:        if (tpgrp > 0)
        !            73:                ioctl(FSHTTY, TIOCSPGRP, &tpgrp);
        !            74:        reset();                /* Unwind */
        !            75: }
        !            76: 
        !            77: /*
        !            78:  * Perror is the shells version of perror which should otherwise
        !            79:  * never be called.
        !            80:  */
        !            81: Perror(s)
        !            82:        char *s;
        !            83: {
        !            84: 
        !            85:        /*
        !            86:         * Perror uses unit 2, thus if we didn't set up the fd's
        !            87:         * we must set up unit 2 now else the diagnostic will disappear
        !            88:         */
        !            89:        if (!didfds) {
        !            90:                register int oerrno = errno;
        !            91: 
        !            92:                dcopy(SHDIAG, 2);
        !            93:                errno = oerrno;
        !            94:        }
        !            95:        perror(s);
        !            96:        error(NOSTR);           /* To exit or unwind */
        !            97: }
        !            98: 
        !            99: bferr(cp)
        !           100:        char *cp;
        !           101: {
        !           102: 
        !           103:        flush();
        !           104:        haderr = 1;
        !           105:        printf("%s: ", bname);
        !           106:        error(cp);
        !           107: }
        !           108: 
        !           109: /*
        !           110:  * The parser and scanner set up errors for later by calling seterr,
        !           111:  * which sets the variable err as a side effect; later to be tested,
        !           112:  * e.g. in process.
        !           113:  */
        !           114: seterr(s)
        !           115:        char *s;
        !           116: {
        !           117: 
        !           118:        if (err == 0)
        !           119:                err = s, errspl = 0;
        !           120: }
        !           121: 
        !           122: /* Set err to a splice of cp and dp, to be freed later in error() */
        !           123: seterr2(cp, dp)
        !           124:        char *cp, *dp;
        !           125: {
        !           126: 
        !           127:        if (err)
        !           128:                return;
        !           129:        err = strspl(cp, dp);
        !           130:        errspl++;
        !           131: }
        !           132: 
        !           133: /* Set err to a splice of cp with a string form of character d */
        !           134: seterrc(cp, d)
        !           135:        char *cp, d;
        !           136: {
        !           137:        char chbuf[2];
        !           138: 
        !           139:        chbuf[0] = d;
        !           140:        chbuf[1] = 0;
        !           141:        seterr2(cp, chbuf);
        !           142: }

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