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Annotation of researchv10no/cmd/learn/lib/src/maktee.c, revision 1.1.1.1

1.1       root        1: #include "stdio.h"
                      2: #include "signal.h"
                      3: #include "lrnref"
                      4: 
                      5: static int oldout;
                      6: static char tee[50];
                      7: 
                      8: maktee()
                      9: {
                     10:        int fpip[2], in, out;
                     11: 
                     12:        if (tee[0] == 0)
                     13:                sprintf(tee, "%s/tee", direct);
                     14:        pipe(fpip);
                     15:        in = fpip[0];
                     16:        out= fpip[1];
                     17:        if (fork() == 0) {
                     18:                signal(SIGINT, SIG_IGN);
                     19:                close(0);
                     20:                close(out);
                     21:                dup(in);
                     22:                close(in);
                     23:                execl (tee, "lrntee", 0);
                     24:                fprintf(stderr, "Tee exec failed\n");
                     25:                exit(1);
                     26:        }
                     27:        close(in);
                     28:        fflush(stdout);
                     29:        oldout = dup(1);
                     30:        close(1);
                     31:        if (dup(out) != 1)
                     32:                fprintf(stderr, "Error making tee for copyout\n");
                     33:        close(out);
                     34:        return(1);
                     35: }
                     36: 
                     37: untee()
                     38: {
                     39:        int x;
                     40: 
                     41:        fflush(stdout);
                     42:        close(1);
                     43:        dup(oldout);
                     44:        close(oldout);
                     45:        wait(&x);
                     46: }

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