diff options
Diffstat (limited to 'src/consoletype.c')
| -rw-r--r-- | src/consoletype.c | 59 |
1 files changed, 45 insertions, 14 deletions
diff --git a/src/consoletype.c b/src/consoletype.c index 87dbf07..c8b8dd6 100644 --- a/src/consoletype.c +++ b/src/consoletype.c @@ -3,36 +3,67 @@ * simple app to figure out whether the current terminal * is serial, console (vt), or remote (pty). * - * Copyright 1999-2004 Gentoo Foundation + * Copyright 1999-2006 Gentoo Foundation * Distributed under the terms of the GNU General Public License v2 - * $Header$ */ #include <stdio.h> +#include <stdlib.h> +#include <unistd.h> #include <string.h> #include <sys/ioctl.h> #include <sys/stat.h> #include "headers.h" -int main(int argc, char *argv[]) +enum { IS_VT = 0, IS_SERIAL = 1, IS_PTY = 2, IS_UNK = 3 }; +const char * const tty_names[] = { "vt", "serial", "pty", "unknown" }; + +static inline int check_ttyname(void) +{ + char *tty = ttyname(0); + + if (tty == NULL) + return IS_UNK; + + if (strncmp(tty, "/dev/", 5) == 0) + tty += 5; + + if (!strncmp (tty, "ttyS", 4) || !strncmp (tty, "cuaa", 4)) + return IS_SERIAL; + else if (!strncmp (tty, "pts/", 4) || !strncmp (tty, "ttyp", 4)) + return IS_PTY; + else if (!strncmp (tty, "tty", 3)) + return IS_VT; + else + return IS_UNK; +} + +static inline int check_devnode(void) { +#if defined(__linux__) int maj; struct stat sb; fstat(0, &sb); maj = major(sb.st_rdev); if (maj != 3 && (maj < 136 || maj > 143)) { -#if defined(__linux__) +#if defined(TIOCLINUX) unsigned char twelve = 12; - if (ioctl (0, TIOCLINUX, &twelve) < 0) { - printf("serial\n"); - return 1; - } + if (ioctl (0, TIOCLINUX, &twelve) < 0) + return IS_SERIAL; #endif - printf("vt\n"); - return 0; - } else { - printf("pty\n"); - return 2; - } + return IS_VT; + } else + return IS_PTY; +#endif + return IS_UNK; +} + +int main(int argc, char *argv[]) +{ + int type = check_ttyname(); + if (type == IS_UNK) + type = check_devnode(); + puts(tty_names[type]); + return type; } |