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Annotation of 41BSD/cmd/csh/sh.err.c, revision 1.1.1.1

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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