---
Makefile | 2 ++
libc/unistd/ttyname.c | 16 ++++++++++++++++
libc/unistd/ttyname_r.c | 29 +++++++++++++++++++++++++++++
modules/tests/Makefile | 3 ++-
tests/tst-ttyname.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 98 insertions(+), 1 deletion(-)
create mode 100644 libc/unistd/ttyname.c
create mode 100644 libc/unistd/ttyname_r.c
create mode 100644 tests/tst-ttyname.c
diff --git a/Makefile b/Makefile
index 9182618..3ef3b54 100644
--- a/Makefile
+++ b/Makefile
@@ -1652,6 +1652,8 @@ libc += unistd/getpgrp.o
libc += unistd/getppid.o
libc += unistd/getsid.o
libc += unistd/setsid.o
+libc += unistd/ttyname_r.o
+libc += unistd/ttyname.o
musl += regex/fnmatch.o
musl += regex/glob.o
diff --git a/libc/unistd/ttyname.c b/libc/unistd/ttyname.c
new file mode 100644
index 0000000..3fa71b2
--- /dev/null
+++ b/libc/unistd/ttyname.c
@@ -0,0 +1,16 @@
+#include <unistd.h>
+#include <errno.h>
+#include <limits.h>
+#include <memory.h>
+
+char* ttyname(int fd)
+{
+ static char buf[TTY_NAME_MAX];
+ memset(buf, 0, sizeof(buf));
+ int result;
+ if ((result = ttyname_r(fd, buf, sizeof(buf)))) {
+ errno = result;
+ return NULL;
+ }
+ return buf;
+}
diff --git a/libc/unistd/ttyname_r.c b/libc/unistd/ttyname_r.c
new file mode 100644
index 0000000..0bdba2b
--- /dev/null
+++ b/libc/unistd/ttyname_r.c
@@ -0,0 +1,29 @@
+#include <unistd.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+int ttyname_r(int fd, char *buf, size_t buflen)
+{
+ if (fd < 0) {
+ return EBADF;
+ }
+ // OSv doesn't support any virtual terminals or ptys so return
+ // the fixed pathname of /dev/console
+ char* ttyname = "/dev/console\0";
+ size_t len = strlen(ttyname);
+ if (!isatty(fd)) {
+ return ENOTTY;
+ } else {
+ // Size must be large enough to hold the pathname + NULL char. buf must
+ // also not be NULL
+ if (buflen < len + 1 || !buf) {
+ return ERANGE;
+ } else {
+ memcpy(buf, ttyname, len);
+ buf[len] = 0;
+ return 0;
+ }
+ }
+ return 0;
+}
diff --git a/modules/tests/Makefile b/modules/tests/Makefile
index 6e3aea7..3f9cb59 100644
--- a/modules/tests/Makefile
+++ b/modules/tests/Makefile
@@ -84,7 +84,8 @@ tests := tst-pthread.so misc-ramdisk.so tst-vblk.so
tst-bsd-evh.so \
tst-namespace.so tst-without-namespace.so payload-env.so \
payload-merge-env.so misc-execve.so misc-execve-payload.so
misc-mutex2.so \
tst-pthread-setcancelstate.so tst-syscall.so tst-pin.so tst-run.so \
- tst-ifaddrs.so tst-pthread-affinity-inherit.so tst-sem-timed-wait.so
+ tst-ifaddrs.so tst-pthread-affinity-inherit.so tst-sem-timed-wait.so \
+ tst-ttyname.so
# libstatic-thread-variable.so tst-static-thread-variable.so \
diff --git a/tests/tst-ttyname.c b/tests/tst-ttyname.c
new file mode 100644
index 0000000..ee2efca
--- /dev/null
+++ b/tests/tst-ttyname.c
@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <memory.h>
+#include <errno.h>
+#include <stdbool.h>
+
+unsigned int tests_total = 0, tests_failed = 0;
+
+void report(const char* name, bool passed)
+{
+ static const char* status[] = {"FAIL", "PASS"};
+ printf("%s: %s\n", status[passed], name);
+ tests_total += 1;
+ tests_failed += !passed;
+}
+
+int main(void)
+{
+ printf("Starting ttyname_r/ttyname test\n");
+ // Basic flow for test
+ // 1) Take fds for stdin, stdout and stderr and call ttyname_r and ttyname
+ // 2) Use an invalid fd (-1) and call ttyname_r and ttyname
+
+ char buf[256];
+ memset(buf, 0, sizeof(buf));
+ int fds[4] = {-1, STDIN_FILENO, STDOUT_FILENO, STDERR_FILENO};
+
+ for (int i = 0; i < 4; i++) {
+ int retval = ttyname_r(fds[i], buf, sizeof(buf));
+ printf("fd: %d ttyname_r retval: %d, buf: %s\n", fds[i], retval, buf);
+ if (fds[i] < 0) {
+ report("[ttyname_r] bad fds\0", retval == EBADF);
+ } else {
+ report("[ttyname_r] std* fd\0",
+ retval == 0 && strcmp(buf, "/dev/console\0") == 0);
+ }
+ char* tty = ttyname(fds[i]);
+ printf("fd: %d ttyname retval: %s\n", fds[i], tty);
+ if (fds[i] < 0) {
+ report("[ttyname] bad fds\0", tty == NULL);
+ } else {
+ report("[ttyname] std* fds\0", strcmp(buf, "/dev/console\0") == 0);
+ }
+ memset(buf, 0, sizeof(buf));
+ }
+
+ printf("SUMMARY: %u tests / %u failures\n", tests_total, tests_failed);
+ return 0;
+}
--
2.7.4
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