diff options
Diffstat (limited to '05/musl-0.6.0/src/unistd/ctermid.c')
-rw-r--r-- | 05/musl-0.6.0/src/unistd/ctermid.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/05/musl-0.6.0/src/unistd/ctermid.c b/05/musl-0.6.0/src/unistd/ctermid.c new file mode 100644 index 0000000..21b44ec --- /dev/null +++ b/05/musl-0.6.0/src/unistd/ctermid.c @@ -0,0 +1,23 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <fcntl.h> +#include <unistd.h> +#include <limits.h> + +char *ctermid(char *s) +{ + static char *s2; + int fd; + if (!s) { + if (!s2) s2 = malloc(L_ctermid); + s = s2; + } + fd = open("/dev/tty", O_WRONLY | O_NOCTTY); + if (fd < 0) + return strcpy(s, ""); + if (ttyname_r(fd, s, L_ctermid)) + strcpy(s, ""); + close(fd); + return s; +} |