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Annotation of researchv10no/cmd/dist/talk/slide6, revision 1.1

1.1     ! root        1: .BU
        !             2: Tenth Edition code to make a network call:
        !             3: .CO
        !             4: #include <ipc.h>
        !             5: 
        !             6: \fI[...]\fP
        !             7: 
        !             8: int fd;
        !             9: 
        !            10: fd = ipcopen(ipcpath(hostname, "dk", "dist"), "heavy");
        !            11: if (fd < 0) {
        !            12:        fprintf(stderr, "can't call %s\\n", hostname);
        !            13:        exit(1);
        !            14: }
        !            15: .CE
        !            16: .BU
        !            17: Berkeley code to make a network call:
        !            18: .CO
        !            19: #include <sys/types.h>
        !            20: #include <sys/socket.h>
        !            21: #include <netinet/in.h>
        !            22: #include <netdb.h>
        !            23: 
        !            24: \fI[...]\fP
        !            25: 
        !            26: int fd;
        !            27: struct hostent *h;
        !            28: struct servent *s;
        !            29: struct sockaddr_in sin;
        !            30: 
        !            31: h = gethostbyname(hostname);
        !            32: s = getservbyname("dist", "tcp");
        !            33: fd = socket(AF_INET, SOCK_STREAM, 0);
        !            34: sin.sin_family = AF_INET;
        !            35: sin.sin_port = s->s_port;
        !            36: memcpy(&sin.sin_addr, h->h_addr, h->h_length);
        !            37: if (connect(fd, &sin, sizeof sin) < 0) {
        !            38:        fprintf(stderr, "can't call %s\\n", hostname);
        !            39:        exit(1);
        !            40: }
        !            41: .CE
        !            42: .BU
        !            43: Hostnames as seen from a Tenth Edition system:
        !            44: .EX
        !            45: dk!nj/astro/coma
        !            46: tcp!pyxis.research.att.com
        !            47: .EN
        !            48: .BU
        !            49: Hostnames as seen from a Berkeley system:
        !            50: .EX
        !            51: bowell.research.att.com
        !            52: .EN

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