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author | Rich Felker <dalias@aerifal.cx> | 2011-02-12 00:22:29 -0500 |
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committer | Rich Felker <dalias@aerifal.cx> | 2011-02-12 00:22:29 -0500 |
commit | 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 (patch) | |
tree | 6eaef0d8a720fa3da580de87b647fff796fe80b3 /src/unistd/ctermid.c | |
download | musl-0b44a0315b47dd8eced9f3b7f31580cf14bbfc01.tar.gz musl-0b44a0315b47dd8eced9f3b7f31580cf14bbfc01.tar.xz musl-0b44a0315b47dd8eced9f3b7f31580cf14bbfc01.zip |
initial check-in, version 0.5.0 v0.5.0
Diffstat (limited to 'src/unistd/ctermid.c')
-rw-r--r-- | src/unistd/ctermid.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/unistd/ctermid.c b/src/unistd/ctermid.c new file mode 100644 index 00000000..21b44ec8 --- /dev/null +++ b/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; +} |