Implement osdep_get_name and osdep_get_cwd for AIX, from J Raynor.

compat/forkpty-aix.c

@@ -40,6 +40,10 @@ forkpty(int *master, unused char *name, struct termios *tio, struct winsize *ws)
 
 	if ((path = ttyname(*master)) == NULL)
 		goto out;
+
+	if (name != NULL)
+		strlcpy(name, path, TTY_NAME_MAX);
+
 	if ((slave = open(path, O_RDWR|O_NOCTTY)) == -1)
 		goto out;
 

osdep-aix.c

@@ -16,21 +16,75 @@
  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/procfs.h>
 
-#include <event.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
 
 #include "tmux.h"
 
 char *
-osdep_get_name(unused int fd, unused char *tty)
+osdep_get_name(unused int fd, char *tty)
 {
-	return (NULL);
+	struct psinfo	 p;
+	char		*path;
+	ssize_t		 bytes;
+	int		 f, ttyfd, retval;
+	pid_t		 pgrp;
+
+	if ((ttyfd = open(tty, O_RDONLY|O_NOCTTY)) == -1)
+		return (NULL);
+
+	retval = ioctl(ttyfd, TIOCGPGRP, &pgrp);
+	close(ttyfd);
+	if (retval == -1)
+		return (NULL);
+
+	xasprintf(&path, "/proc/%u/psinfo", (u_int) pgrp);
+	f = open(path, O_RDONLY);
+	free(path);
+	if (f < 0)
+		return (NULL);
+
+	bytes = read(f, &p, sizeof(p));
+	close(f);
+	if (bytes != sizeof(p))
+		return (NULL);
+
+	return (xstrdup(p.pr_fname));
 }
 
 char *
-osdep_get_cwd(unused int fd)
+osdep_get_cwd(int fd)
 {
+	static char      target[MAXPATHLEN + 1];
+	char            *path;
+	const char      *ttypath;
+	ssize_t          n;
+	pid_t            pgrp;
+	int              len, retval, ttyfd;
+
+	if ((ttypath = ptsname(fd)) == NULL)
+		return (NULL);
+	if ((ttyfd = open(ttypath, O_RDONLY|O_NOCTTY)) == -1)
+		return (NULL);
+
+	retval = ioctl(ttyfd, TIOCGPGRP, &pgrp);
+	close(ttyfd);
+	if (retval == -1)
+		return (NULL);
+
+	xasprintf(&path, "/proc/%u/cwd", (u_int) pgrp);
+	n = readlink(path, target, MAXPATHLEN);
+	free(path);
+	if (n > 0) {
+		target[n] = '\0';
+		if ((len = strlen(target)) > 1 && target[len - 1] == '/')
+			target[len - 1] = '\0';
+		return (target);
+	}
 	return (NULL);
 }