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Annotation of coherent/b/lib/libc/XSTDIO/other/getlogin.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Coherent I/O Library.
        !             3:  * Get login name from the utmp file.
        !             4:  */
        !             5: 
        !             6: #include <stdio.h>
        !             7: #include <utmp.h>
        !             8: 
        !             9: char   *ttyname();
        !            10: 
        !            11: char *
        !            12: getlogin()
        !            13: {
        !            14:        register struct utmp *up;
        !            15:        register int n;
        !            16:        register char *tname;
        !            17:        register int ufd;
        !            18:        char iobuf[BUFSIZ+1];
        !            19:        static char uname[DIRSIZ];
        !            20: 
        !            21:        if ((ufd = open("/etc/utmp", 0))>=0
        !            22:            && (tname = ttyname(fileno(stderr)))!=NULL) {
        !            23:                tname += 5;                     /* Skip over "/dev/" */
        !            24:                while ((n = read(ufd, iobuf, BUFSIZ)) > 0)
        !            25:                        for (up = iobuf; up < &iobuf[n]; up++)
        !            26:                                if (strncmp(up->ut_line, tname, 8) == 0) {
        !            27:                                        close(ufd);
        !            28:                                        strncpy(uname, up->ut_name, DIRSIZ);
        !            29:                                        return (uname);
        !            30:                                }
        !            31:                close(ufd);
        !            32:        }
        !            33:        return (NULL);
        !            34: }

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