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Annotation of 40BSD/libc/gen/getlogin.c, revision 1.1.1.1

1.1       root        1: #include <utmp.h>
                      2: 
                      3: static char    UTMP[]  = "/etc/utmp";
                      4: static struct  utmp ubuf;
                      5: 
                      6: char *
                      7: getlogin()
                      8: {
                      9:        register me, uf;
                     10:        register char *cp;
                     11: 
                     12:        if( !(me = ttyslot()) )
                     13:                return(0);
                     14:        if( (uf = open( UTMP, 0 )) < 0 )
                     15:                return(0);
                     16:        lseek( uf, (long)(me*sizeof(ubuf)), 0 );
                     17:        if (read(uf, (char *)&ubuf, sizeof(ubuf)) != sizeof(ubuf))
                     18:                return(0);
                     19:        close(uf);
                     20:        ubuf.ut_name[sizeof (ubuf.ut_name)] = ' ';
                     21:        for (cp=ubuf.ut_name; *cp++!=' ';)
                     22:                ;
                     23:        *--cp = '\0';
                     24:        return( ubuf.ut_name );
                     25: }

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