46 lines
904 B
C
46 lines
904 B
C
#ifndef _NO_GETLOGIN
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <utmp.h>
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#include <fcntl.h>
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#include <_syslist.h>
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char *
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getlogin ()
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{
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int utmp_fd;
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struct utmp utmp_buf;
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static char buf[10];
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extern char *ttyname ();
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char *tty;
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if (((tty = ttyname (0)) == 0)
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|| ((tty = ttyname (1)) == 0)
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|| ((tty = ttyname (2)) == 0))
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return 0;
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if ((utmp_fd = open (UTMP_FILE, O_RDONLY)) == -1)
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return 0;
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if (!strncmp (tty, "/dev/", 5))
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tty += 5;
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while (read (utmp_fd, &utmp_buf, sizeof (utmp_buf)) == sizeof (utmp_buf))
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{
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if (!strncmp (tty, utmp_buf.ut_line, sizeof (utmp_buf.ut_line))
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&& utmp_buf.ut_type == USER_PROCESS)
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{
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close (utmp_fd);
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memset (buf, 0, sizeof (buf));
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strncpy (buf, utmp_buf.ut_user, sizeof (utmp_buf.ut_user));
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return buf;
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}
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}
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close (utmp_fd);
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return 0;
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}
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#endif /* !_NO_GETLOGIN */
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