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Annotation of researchv10no/cmd/uucp/uucpname.c, revision 1.1

1.1     ! root        1: /*     /sccs/src/cmd/uucp/s.uucpname.c
        !             2:        uucpname.c      1.1     8/30/84 17:38:03
        !             3: */
        !             4: #include "uucp.h"
        !             5: VERSION(@(#)uucpname.c 1.1);
        !             6: 
        !             7: /*
        !             8:  * get the uucp name
        !             9:  * return:
        !            10:  *     none
        !            11:  */
        !            12: void
        !            13: uucpname(name)
        !            14: register char *name;
        !            15: {
        !            16:        char *s;
        !            17: 
        !            18: #ifdef BSD4_2
        !            19:        int nlen;
        !            20:        char    NameBuf[MAXBASENAME + 1];
        !            21: 
        !            22:        /* This code is slightly wrong, at least if you believe what the */
        !            23:        /* 4.1c manual says.  It claims that gethostname's second parameter */
        !            24:        /* should be a pointer to an int that has the size of the buffer. */
        !            25:        /* The code in the kernel says otherwise.  The manual also says that */
        !            26:        /* the string returned is null-terminated; this, too, appears to be */
        !            27:        /* contrary to fact.  Finally, the variable containing the length */
        !            28:        /* is supposed to be modified to have the actual length passed back; */
        !            29:        /* this, too, doesn't happen.  So I'm zeroing the buffer first, and */
        !            30:        /* passing an int, not a pointer to one.  *sigh*
        !            31: 
        !            32:        /*              --Steve Bellovin        */
        !            33:        bzero(NameBuf, sizeof NameBuf);
        !            34:        nlen = sizeof NameBuf;
        !            35:        gethostname(NameBuf, nlen);
        !            36:        s = NameBuf;
        !            37:        s[nlen] = '\0';
        !            38: #else
        !            39: #ifdef UNAME
        !            40:        struct utsname utsn;
        !            41: 
        !            42:        uname(&utsn);
        !            43:        s = utsn.nodename;
        !            44: #else
        !            45:        char    NameBuf[MAXBASENAME + 1], *strchr();
        !            46:        FILE    *NameFile;
        !            47: 
        !            48:        s = MYNAME;
        !            49:        NameBuf[0] = '\0';
        !            50: 
        !            51:        if ((NameFile = fopen("/etc/whoami", "r")) != NULL) {
        !            52:                /* etc/whoami wins */
        !            53:                (void) fgets(NameBuf, MAXBASENAME + 1, NameFile);
        !            54:                (void) fclose(NameFile);
        !            55:                NameBuf[MAXBASENAME] = '\0';
        !            56:                if (NameBuf[0] != '\0') {
        !            57:                        if ((s = strchr(NameBuf, '\n')) != NULL)
        !            58:                                *s = '\0';
        !            59:                        s = NameBuf;
        !            60:                }
        !            61:        }
        !            62: #endif
        !            63: #endif
        !            64: 
        !            65:        (void) strncpy(name, s, MAXBASENAME);
        !            66:        name[MAXBASENAME] = '\0';
        !            67:        return;
        !            68: }

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