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Annotation of 43BSDTahoe/usr.bin/learn/maktee.c, revision 1.1

1.1     ! root        1: #ifndef lint
        !             2: static char sccsid[] = "@(#)maktee.c   4.2     (Berkeley)      4/25/83";
        !             3: #endif not lint
        !             4: 
        !             5: #include "stdio.h"
        !             6: #include "signal.h"
        !             7: #include "lrnref.h"
        !             8: 
        !             9: static int oldout;
        !            10: static char tee[50];
        !            11: 
        !            12: maktee()
        !            13: {
        !            14:        int fpip[2], in, out;
        !            15: 
        !            16:        if (tee[0] == 0)
        !            17:                sprintf(tee, "%s/bin/lrntee", direct);
        !            18:        pipe(fpip);
        !            19:        in = fpip[0];
        !            20:        out= fpip[1];
        !            21:        if (fork() == 0) {
        !            22:                signal(SIGINT, SIG_IGN);
        !            23:                close(0);
        !            24:                close(out);
        !            25:                dup(in);
        !            26:                close(in);
        !            27:                execl (tee, "lrntee", 0);
        !            28:                perror(tee);
        !            29:                fprintf(stderr, "Maktee:  lrntee exec failed\n");
        !            30:                exit(1);
        !            31:        }
        !            32:        close(in);
        !            33:        fflush(stdout);
        !            34:        oldout = dup(1);
        !            35:        close(1);
        !            36:        if (dup(out) != 1) {
        !            37:                perror("dup");
        !            38:                fprintf(stderr, "Maktee:  error making tee for copyout\n");
        !            39:        }
        !            40:        close(out);
        !            41:        return(1);
        !            42: }
        !            43: 
        !            44: untee()
        !            45: {
        !            46:        int x;
        !            47: 
        !            48:        fflush(stdout);
        !            49:        close(1);
        !            50:        dup(oldout);
        !            51:        close(oldout);
        !            52:        wait(&x);
        !            53: }

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