diff options
| -rw-r--r-- | daemons/getty.c | 86 |
1 files changed, 79 insertions, 7 deletions
diff --git a/daemons/getty.c b/daemons/getty.c index 5a2896d8..7112660e 100644 --- a/daemons/getty.c +++ b/daemons/getty.c @@ -1,6 +1,7 @@ /* Stubby version of getty for Hurd - Copyright (C) 1996, 1998, 1999, 2007 Free Software Foundation, Inc. + Copyright (C) 1996, 1998, 1999, 2007, 2014 + Free Software Foundation, Inc. Written by Michael I. Bushnell, p/BSG. @@ -39,6 +40,7 @@ extern char *localhost (); #define _PATH_LOGIN "/bin/login" +#define _PATH_ISSUE "/etc/issue" /* Parse the terminal speed. */ static void @@ -59,22 +61,92 @@ set_speed (int tty, char *speedstr) tcsetattr (tty, TCSAFLUSH, &ttystat); } +/* Load a banner from _PATH_ISSUE. If that fails, a built-in version + is provided. */ +static char * +load_banner (void) +{ + char *buf = NULL, *p; + struct stat st; + int fd; + ssize_t remaining, count; + + fd = open (_PATH_ISSUE, O_RDONLY); + if (fd == -1) + goto out; + + if (fstat (fd, &st) == -1) + goto out; + + buf = malloc (st.st_size + 1); + if (buf == NULL) + goto out; + + remaining = st.st_size; + p = buf; + while (remaining > 0) + { + count = read (fd, p, remaining); + if (count == -1) + { + close (fd); + goto out; + } + p += count; + remaining -= count; + } + + buf[st.st_size] = '\0'; + close (fd); + return buf; + + out: + free (buf); + return "\r\n\n\\s \\r (\\n) (\\l)\r\n\n"; +} /* Print a suitable welcome banner */ static void print_banner (int fd, char *ttyname) { - int cc; - char *s; + char *s, *t, *expansion; struct utsname u; - char *hostname = localhost (); if (uname (&u)) u.sysname[0] = u.release[0] = '\0'; - cc = asprintf (&s, "\r\n\n%s %s (%s) (%s)\r\n\n", - u.sysname, u.release, hostname ?: "?", basename (ttyname)); - write (fd, s, cc); + for (s = load_banner (); *s; s++) + { + for (t = s; *t && *t != '\\'; t++) /* nomnomnom */; + + write (fd, s, t - s); + if (! *t) + return; + + switch (*(t + 1)) + { + case '\\': + expansion = "\\"; + break; + case 's': + expansion = u.sysname; + break; + case 'r': + expansion = u.release; + break; + case 'n': + expansion = localhost () ?: "?"; + break; + case 'l': + expansion = basename (ttyname); + break; + default: + expansion = "?"; + } + write (fd, expansion, strlen (expansion)); + + s = t + 1; + } } int |