Be more clever about picking window name.

CHANGES

@@ -1,5 +1,6 @@
 26 January 2009
 
+* Be more clever about picking the right process to create the window name.
 * Don't balls up the terminal on UTF-8 combined characters. Don't support them
   properly either - they are just discarded for the moment.
 
@@ -1013,7 +1014,7 @@
   (including mutt, emacs). No status bar yet and no key remapping or other
   customisation.
 
-$Id: CHANGES,v 1.235 2009-01-26 20:57:42 nicm Exp $
+$Id: CHANGES,v 1.236 2009-01-26 22:57:18 nicm Exp $
 
  LocalWords:  showw utf UTF fulvio ciriaco joshe OSC APC gettime abc DEF OA clr
  LocalWords:  rivo nurges lscm Erdely eol smysession mysession ek dstname RB ms

names.c

@@ -1,4 +1,4 @@
-/* $Id: names.c,v 1.1 2009-01-20 19:35:03 nicm Exp $ */
+/* $Id: names.c,v 1.2 2009-01-26 22:57:19 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -31,8 +31,7 @@ set_window_names(void)
 {
 	struct window	*w;
 	u_int		 i;
-	pid_t		 pgrp;
+	char		*name, *wname;
-	char		*name;
 	struct timeval	 tv, tv2;
 	
 	if (gettimeofday(&tv, NULL) != 0)
@@ -53,21 +52,20 @@ set_window_names(void)
 		timeradd(&w->name_timer, &tv2, &w->name_timer);	
 
 		if (w->active->screen != &w->active->base)
-			pgrp = -1;
+			name = NULL;
-		else if ((pgrp = tcgetpgrp(w->active->fd)) == w->pgrp)
-			continue;
-		w->pgrp = pgrp;
-
-		name = get_argv0(pgrp);
-		if (pgrp == -1 || name == NULL)
-			name = default_window_name(w);
 		else
-			name = parse_window_name(name);
+			name = get_argv0(w->active->fd, w->active->tty);
-		if (strcmp(name, w->name) == 0)
+		if (name == NULL)
+			wname = default_window_name(w);
+		else {
+			wname = parse_window_name(name);
 			xfree(name);
+		}
+		if (strcmp(wname, w->name) == 0)
+			xfree(wname);
 		else {
 			xfree(w->name);
-			w->name = name;
+			w->name = wname;
 			server_status_window(w);
 		}
 	}

osdep-darwin.c

@@ -1,4 +1,4 @@
-/* $Id: osdep-darwin.c,v 1.1 2009-01-20 22:17:53 nicm Exp $ */
+/* $Id: osdep-darwin.c,v 1.2 2009-01-26 22:57:19 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Joshua Elsasser <josh@elsasser.org>
@@ -23,7 +23,7 @@
 
 #include <stdlib.h>
 
-char	*get_argv0(pid_t);
+char	*get_argv0(int, char *);
 
 /*
  * XXX This actually returns the executable path, not the process's argv[0].
@@ -32,13 +32,15 @@ char	*get_argv0(pid_t);
  */
 
 char *
-get_argv0(pid_t pgrp)
+get_argv0(int fd, __attribute__ ((unused)) char *tty)
 {
 	int	mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, 0 };
         size_t	size;
 	struct kinfo_proc kp;
 	
-	mib[3] = pgrp;
+	if ((mib[3] = tcgetpgrp(fd)) == -1)
+		return (NULL)
+
 	size = sizeof kp;
 	if (sysctl(mib, 4, &kp, &size, NULL, 0) == -1 ||
 	    kp.kp_proc.p_comm[0] == '\0')

osdep-freebsd.c

@@ -1,4 +1,4 @@
-/* $Id: osdep-freebsd.c,v 1.2 2009-01-20 22:17:53 nicm Exp $ */
+/* $Id: osdep-freebsd.c,v 1.3 2009-01-26 22:57:19 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -19,7 +19,10 @@
 #ifdef __FreeBSD__
 
 #include <sys/param.h>
+#include <sys/proc.h>
+#include <sys/stat.h>
 #include <sys/sysctl.h>
+#include <sys/user.h>
 
 #include <err.h>
 #include <errno.h>
@@ -28,19 +31,80 @@
 #include <string.h>
 #include <unistd.h>
 
-char	*get_argv0(pid_t);
+char	*get_argv0(int, char *);
+char	*get_proc_argv0(pid_t);
+
+#define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
 
 char *
-get_argv0(pid_t pgrp)
+get_argv0(__attribute__ ((unused)) int fd, char *tty)
+{
+	int		 mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_TTY, 0 };
+	struct stat	 sb;
+	size_t		 len;
+	struct kinfo_proc *buf, *newbuf, *p, *bestp;
+	char		*procname;
+	u_int		 i;
+
+	buf = NULL;
+
+	if (stat(tty, &sb) == -1)
+		return (NULL);
+	mib[3] = sb.st_rdev;
+
+retry:
+	if (sysctl(mib, nitems(mib), NULL, &len, NULL, 0) == -1)
+		return (NULL);
+	len = (len * 5) / 4;
+
+	if ((newbuf = realloc(buf, len)) == NULL) {
+		free(buf);
+		return (NULL);
+	}
+	buf = newbuf;
+
+	if (sysctl(mib, nitems(mib), buf, &len, NULL, 0) == -1) {
+		if (errno == ENOMEM)
+			goto retry;
+		free(buf);
+		return (NULL);
+	}
+
+	bestp = NULL;
+	for (i = 0; i < len / sizeof (struct kinfo_proc); i++) {
+		p = &buf[i];
+		if (bestp == NULL)
+			bestp = p;
+
+		if (p->ki_stat != SRUN && p->ki_stat != SIDL)
+			continue;
+		if (p->ki_estcpu < bestp->ki_estcpu)
+			continue;
+		if (p->ki_slptime > bestp->ki_slptime)
+			continue;
+		bestp = p;
+	}
+	
+	procname = get_proc_argv0(bestp->ki_pid);
+	if (procname == NULL || *procname == '\0') {
+		free(procname);
+		procname = strdup(bestp->ki_comm);
+	}
+
+	free(buf);
+	return (procname);
+}
+
+char *
+get_proc_argv0(pid_t pid)
 {
 	int	mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_ARGS, 0 };
         size_t	size;
 	char   *args, *args2, *procname;
 
+	mib[3] = pid;
 	procname = NULL;
 
-	mib[3] = pgrp;
-
 	args = NULL;
 	size = 128;
 	while (size < SIZE_MAX / 2) {

osdep-linux.c

@@ -1,4 +1,4 @@
-/* $Id: osdep-linux.c,v 1.1 2009-01-20 19:35:03 nicm Exp $ */
+/* $Id: osdep-linux.c,v 1.2 2009-01-26 22:57:19 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -27,16 +27,23 @@
 #include "tmux.h"
 
 char *
-get_argv0(pid_t pgrp)
+get_argv0(int fd, unused char *tty)
 {
 	FILE	*f;
 	char	*path, *buf;
 	size_t	 len;
 	int	 ch;
+	pid_t	 pgrp;
+
+	if ((pgrp = tcgetpgrp(fd)) == -1)
+		return (NULL);
 
 	xasprintf(&path, "/proc/%lld/cmdline", (long long) pgrp);
-	if ((f = fopen(path, "r")) == NULL)
+	if ((f = fopen(path, "r")) == NULL) {
+		xfree(path);
 		return (NULL);
+	}
+	xfree(path);
 
 	len = 0;
 	buf = NULL;

osdep-openbsd.c

@@ -1,4 +1,4 @@
-/* $Id: osdep-openbsd.c,v 1.2 2009-01-20 22:17:53 nicm Exp $ */
+/* $Id: osdep-openbsd.c,v 1.3 2009-01-26 22:57:19 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -20,6 +20,7 @@
 
 #include <sys/param.h>
 #include <sys/sysctl.h>
+#include <sys/stat.h>
 
 #include <err.h>
 #include <errno.h>
@@ -27,10 +28,73 @@
 #include <string.h>
 #include <unistd.h>
 
-char	*get_argv0(pid_t);
+char	*get_argv0(int, char *);
+char	*get_proc_argv0(pid_t);
 
 char *
-get_argv0(pid_t pgrp)
+get_argv0(__attribute__ ((unused)) int fd, char *tty)
+{
+	int		 mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_TTY, 0 };
+	struct stat	 sb;
+	size_t		 len;
+	struct kinfo_proc *buf, *newbuf;
+	struct proc	*p, *bestp;
+	char		*procname;
+	u_int		 i;
+
+	buf = NULL;
+
+	if (stat(tty, &sb) == -1)
+		return (NULL);
+	mib[3] = sb.st_rdev;
+
+retry:
+	if (sysctl(mib, nitems(mib), NULL, &len, NULL, 0) == -1)
+		return (NULL);
+	len = (len * 5) / 4;
+
+	if ((newbuf = realloc(buf, len)) == NULL) {
+		free(buf);
+		return (NULL);
+	}
+	buf = newbuf;
+
+	if (sysctl(mib, nitems(mib), buf, &len, NULL, 0) == -1) {
+		if (errno == ENOMEM)
+			goto retry;
+		free(buf);
+		return (NULL);
+	}
+
+	bestp = NULL;
+	for (i = 0; i < len / sizeof (struct kinfo_proc); i++) {
+		p = &buf[i].kp_proc;
+		if (bestp == NULL)
+			bestp = p;
+
+		if (p->p_stat != SRUN &&
+		    p->p_stat != SIDL &&
+		    p->p_stat != SONPROC)
+			continue;
+		if (p->p_estcpu < bestp->p_estcpu)
+			continue;
+		if (p->p_slptime > bestp->p_slptime)
+			continue;
+		bestp = p;
+	}
+	
+	procname = get_proc_argv0(bestp->p_pid);
+	if (procname == NULL || *procname == '\0') {
+		free(procname);
+		procname = strdup(bestp->p_comm);
+	}
+
+	free(buf);
+	return (procname);
+}
+
+char *
+get_proc_argv0(pid_t pid)
 {
 	int	mib[4] = { CTL_KERN, KERN_PROC_ARGS, 0, KERN_PROC_ARGV };
         size_t	size;
@@ -38,7 +102,7 @@ get_argv0(pid_t pgrp)
 
 	procname = NULL;
 
-	mib[2] = pgrp;
+	mib[2] = pid;
 
 	args = NULL;
 	size = 128;

tmux.h

@@ -1,4 +1,4 @@
-/* $Id: tmux.h,v 1.250 2009-01-25 19:00:10 tcunha Exp $ */
+/* $Id: tmux.h,v 1.251 2009-01-26 22:57:19 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -592,6 +592,7 @@ struct window_pane {
 	char		*cwd;
 
 	int		 fd;
+	char		 tty[TTY_NAME_MAX];
 	struct buffer	*in;
 	struct buffer	*out;
 
@@ -1503,7 +1504,7 @@ int	utf8_width(u_int);
 char   *section_string(char *, size_t, size_t, size_t);
 
 /* osdep-*.c */
-char   *get_argv0(pid_t);
+char   *get_argv0(int, char *);
 
 /* buffer.c */
 struct buffer 	*buffer_create(size_t);

window.c

@@ -1,4 +1,4 @@
-/* $Id: window.c,v 1.62 2009-01-23 16:59:14 nicm Exp $ */
+/* $Id: window.c,v 1.63 2009-01-26 22:57:20 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -569,7 +569,7 @@ window_pane_spawn(struct window_pane *wp,
 	tv.tv_usec = NAME_INTERVAL * 1000L;
 	timeradd(&wp->window->name_timer, &tv, &wp->window->name_timer);
 
- 	switch (forkpty(&wp->fd, NULL, NULL, &ws)) {
+ 	switch (forkpty(&wp->fd, wp->tty, NULL, &ws)) {
 	case -1:
 		wp->fd = -1;
 		xasprintf(cause, "%s: %s", cmd, strerror(errno));