Last change
on this file since 444 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
|
File size:
904 bytes
|
Rev | Line | |
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[444] | 1 | #ifndef _NO_GETLOGIN |
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| 2 | |
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| 3 | #include <string.h> |
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| 4 | #include <unistd.h> |
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| 5 | #include <sys/types.h> |
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| 6 | #include <utmp.h> |
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| 7 | #include <fcntl.h> |
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| 8 | #include <_syslist.h> |
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| 9 | |
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| 10 | char * |
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| 11 | getlogin () |
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| 12 | { |
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| 13 | int utmp_fd; |
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| 14 | struct utmp utmp_buf; |
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| 15 | static char buf[10]; |
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| 16 | extern char *ttyname (); |
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| 17 | char *tty; |
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| 18 | |
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| 19 | if (((tty = ttyname (0)) == 0) |
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| 20 | || ((tty = ttyname (1)) == 0) |
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| 21 | || ((tty = ttyname (2)) == 0)) |
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| 22 | return 0; |
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| 23 | |
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| 24 | if ((utmp_fd = open (UTMP_FILE, O_RDONLY)) == -1) |
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| 25 | return 0; |
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| 26 | |
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| 27 | if (!strncmp (tty, "/dev/", 5)) |
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| 28 | tty += 5; |
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| 29 | |
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| 30 | while (read (utmp_fd, &utmp_buf, sizeof (utmp_buf)) == sizeof (utmp_buf)) |
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| 31 | { |
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| 32 | if (!strncmp (tty, utmp_buf.ut_line, sizeof (utmp_buf.ut_line)) |
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| 33 | && utmp_buf.ut_type == USER_PROCESS) |
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| 34 | { |
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| 35 | close (utmp_fd); |
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| 36 | memset (buf, 0, sizeof (buf)); |
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| 37 | strncpy (buf, utmp_buf.ut_user, sizeof (utmp_buf.ut_user)); |
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| 38 | return buf; |
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| 39 | } |
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| 40 | } |
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| 41 | |
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| 42 | close (utmp_fd); |
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| 43 | return 0; |
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| 44 | } |
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| 45 | #endif /* !_NO_GETLOGIN */ |
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