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Annotation of researchv10no/ipc/internet/whatsup.c, revision 1.1

1.1     ! root        1: #include <stdio.h>
        !             2: #include <signal.h>
        !             3: int fd;
        !             4: 
        !             5: catch(i)
        !             6:        int i;
        !             7: {
        !             8:        char buf[32];
        !             9: 
        !            10:        sprintf(buf, "signal %d\n", i);
        !            11:        write(fd, buf, strlen(buf));
        !            12:        close(fd);
        !            13:        exit(1);
        !            14: }
        !            15: 
        !            16: main()
        !            17: {
        !            18:        int i;
        !            19:        char c;
        !            20: 
        !            21:        unlink("/tmp/whatsup");
        !            22:        fd = creat("/tmp/whatsup", 0666);
        !            23:        for (i = 0; i < 32; i++)
        !            24:                signal(i, catch);
        !            25:        signal(SIGHUP, SIG_IGN);
        !            26:        signal(SIGPIPE, SIG_IGN);
        !            27:        while(read(0, &c, 1)==1) {
        !            28:                if (write(1, &c, 1)!=1) {
        !            29:                        write(fd, "ERROR 1\n", 8);
        !            30:                        exit(1);
        !            31:                }
        !            32:                write(fd, &c, 1);
        !            33:        }
        !            34:        if(write(1, "EOF\n", 4)!=4) {
        !            35:                write(fd, "ERROR 2\n", 8);
        !            36:                exit(1);
        !            37:        }
        !            38:        write(fd, "EOF\n", 4);
        !            39:        exit(0);
        !            40: }

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