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Better error messages for fork.

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This commit is contained in:
Nicholas Marriott 2009-01-23 16:59:14 +00:00
parent 3f171917f6
commit 4d9af27b0b
12 changed files with 77 additions and 56 deletions
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3
CHANGES
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@ -1,5 +1,6 @@
23 January 2009 23 January 2009
* Better error messages when creating a session or window fails.
* Oops. Return non-zero on error. Reported by Will Maier. * Oops. Return non-zero on error. Reported by Will Maier.
21 January 2009 21 January 2009
@ -1001,7 +1002,7 @@
(including mutt, emacs). No status bar yet and no key remapping or other (including mutt, emacs). No status bar yet and no key remapping or other
customisation. customisation.
$Id: CHANGES,v 1.231 2009-01-23 16:19:56 nicm Exp $ $Id: CHANGES,v 1.232 2009-01-23 16:59:14 nicm Exp $
LocalWords: showw utf UTF fulvio ciriaco joshe OSC APC gettime abc DEF OA clr 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 LocalWords: rivo nurges lscm Erdely eol smysession mysession ek dstname RB ms

1
TODO
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@ -86,5 +86,4 @@
- document split-window -p and -l - document split-window -p and -l
- UTF-8 combining characters don't work (probably should be width 1 but are - UTF-8 combining characters don't work (probably should be width 1 but are
listed as 2) listed as 2)
- better error reporting from session_new etc
- attach should have a flag to create session if it doesn't exist - attach should have a flag to create session if it doesn't exist

4
cmd-attach-session.c
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@ -1,4 +1,4 @@
/* $Id: cmd-attach-session.c,v 1.23 2009-01-19 18:23:40 nicm Exp $ */ /* $Id: cmd-attach-session.c,v 1.24 2009-01-23 16:59:14 nicm Exp $ */
/* /*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net> * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@ -62,7 +62,7 @@ cmd_attach_session_exec(struct cmd *self, struct cmd_ctx *ctx)
} }
if (tty_open(&ctx->cmdclient->tty, &cause) != 0) { if (tty_open(&ctx->cmdclient->tty, &cause) != 0) {
ctx->error(ctx, "%s", cause); ctx->error(ctx, "terminal open failed: %s", cause);
xfree(cause); xfree(cause);
return (-1); return (-1);
} }

8
cmd-link-window.c
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@ -1,4 +1,4 @@
/* $Id: cmd-link-window.c,v 1.27 2009-01-19 18:23:40 nicm Exp $ */ /* $Id: cmd-link-window.c,v 1.28 2009-01-23 16:59:14 nicm Exp $ */
/* /*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net> * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@ -47,6 +47,7 @@ cmd_link_window_exec(struct cmd *self, struct cmd_ctx *ctx)
struct cmd_srcdst_data *data = self->data; struct cmd_srcdst_data *data = self->data;
struct session *dst; struct session *dst;
struct winlink *wl_src, *wl_dst; struct winlink *wl_src, *wl_dst;
char *cause;
int idx; int idx;
if ((wl_src = cmd_find_window(ctx, data->src, NULL)) == NULL) if ((wl_src = cmd_find_window(ctx, data->src, NULL)) == NULL)
@ -89,9 +90,10 @@ cmd_link_window_exec(struct cmd *self, struct cmd_ctx *ctx)
} }
} }
wl_dst = session_attach(dst, wl_src->window, idx); wl_dst = session_attach(dst, wl_src->window, idx, &cause);
if (wl_dst == NULL) { if (wl_dst == NULL) {
ctx->error(ctx, "index in use: %d", idx); ctx->error(ctx, "create session failed: %s", cause);
xfree(cause);
return (-1); return (-1);
} }

8
cmd-move-window.c
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@ -1,4 +1,4 @@
/* $Id: cmd-move-window.c,v 1.4 2009-01-19 18:23:40 nicm Exp $ */ /* $Id: cmd-move-window.c,v 1.5 2009-01-23 16:59:14 nicm Exp $ */
/* /*
* Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net> * Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
@ -50,6 +50,7 @@ cmd_move_window_exec(struct cmd *self, struct cmd_ctx *ctx)
struct client *c; struct client *c;
u_int i; u_int i;
int destroyed, idx; int destroyed, idx;
char *cause;
if ((wl_src = cmd_find_window(ctx, data->src, &src)) == NULL) if ((wl_src = cmd_find_window(ctx, data->src, &src)) == NULL)
return (-1); return (-1);
@ -91,9 +92,10 @@ cmd_move_window_exec(struct cmd *self, struct cmd_ctx *ctx)
} }
} }
wl_dst = session_attach(dst, wl_src->window, idx); wl_dst = session_attach(dst, wl_src->window, idx, &cause);
if (wl_dst == NULL) { if (wl_dst == NULL) {
ctx->error(ctx, "index in use: %d", idx); ctx->error(ctx, "attach window failed: %s", cause);
xfree(cause);
return (-1); return (-1);
} }

12
cmd-new-session.c
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@ -1,4 +1,4 @@
/* $Id: cmd-new-session.c,v 1.37 2009-01-20 19:35:03 nicm Exp $ */ /* $Id: cmd-new-session.c,v 1.38 2009-01-23 16:59:14 nicm Exp $ */
/* /*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net> * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@ -158,14 +158,18 @@ cmd_new_session_exec(struct cmd *self, struct cmd_ctx *ctx)
} }
if (!data->flag_detached && tty_open(&c->tty, &cause) != 0) { if (!data->flag_detached && tty_open(&c->tty, &cause) != 0) {
ctx->error(ctx, "%s", cause); ctx->error(ctx, "open terminal failed: %s", cause);
xfree(cause); xfree(cause);
return (-1); return (-1);
} }
if ((s = session_create(data->newname, cmd, cwd, sx, sy)) == NULL) s = session_create(data->newname, cmd, cwd, sx, sy, &cause);
fatalx("session_create failed"); if (s == NULL) {
ctx->error(ctx, "create session failed: %s", cause);
xfree(cause);
return (-1);
}
if (data->winname != NULL) { if (data->winname != NULL) {
xfree(s->curw->window->name); xfree(s->curw->window->name);
s->curw->window->name = xstrdup(data->winname); s->curw->window->name = xstrdup(data->winname);

9
cmd-new-window.c
View File

@ -1,4 +1,4 @@
/* $Id: cmd-new-window.c,v 1.30 2009-01-21 22:21:49 nicm Exp $ */ /* $Id: cmd-new-window.c,v 1.31 2009-01-23 16:59:14 nicm Exp $ */
/* /*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net> * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@ -120,7 +120,7 @@ cmd_new_window_exec(struct cmd *self, struct cmd_ctx *ctx)
struct cmd_new_window_data *data = self->data; struct cmd_new_window_data *data = self->data;
struct session *s; struct session *s;
struct winlink *wl; struct winlink *wl;
char *cmd, *cwd; char *cmd, *cwd, *cause;
int idx; int idx;
if (data == NULL) if (data == NULL)
@ -168,9 +168,10 @@ cmd_new_window_exec(struct cmd *self, struct cmd_ctx *ctx)
else else
cwd = ctx->cmdclient->cwd; cwd = ctx->cmdclient->cwd;
wl = session_new(s, data->name, cmd, cwd, idx); wl = session_new(s, data->name, cmd, cwd, idx, &cause);
if (wl == NULL) { if (wl == NULL) {
ctx->error(ctx, "command failed: %s", cmd); ctx->error(ctx, "create window failed: %s", cause);
xfree(cause);
return (-1); return (-1);
} }
if (!data->flag_detached) { if (!data->flag_detached) {

9
cmd-respawn-window.c
View File

@ -1,4 +1,4 @@
/* $Id: cmd-respawn-window.c,v 1.12 2009-01-19 18:23:40 nicm Exp $ */ /* $Id: cmd-respawn-window.c,v 1.13 2009-01-23 16:59:14 nicm Exp $ */
/* /*
* Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net> * Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
@ -50,7 +50,7 @@ cmd_respawn_window_exec(struct cmd *self, struct cmd_ctx *ctx)
struct window_pane *wp; struct window_pane *wp;
struct session *s; struct session *s;
const char *env[] = CHILD_ENVIRON; const char *env[] = CHILD_ENVIRON;
char buf[256]; char buf[256], *cause;
u_int i; u_int i;
if ((wl = cmd_find_window(ctx, data->target, &s)) == NULL) if ((wl = cmd_find_window(ctx, data->target, &s)) == NULL)
@ -77,8 +77,9 @@ cmd_respawn_window_exec(struct cmd *self, struct cmd_ctx *ctx)
window_destroy_panes(w); window_destroy_panes(w);
TAILQ_INSERT_HEAD(&w->panes, wp, entry); TAILQ_INSERT_HEAD(&w->panes, wp, entry);
window_pane_resize(wp, w->sx, w->sy); window_pane_resize(wp, w->sx, w->sy);
if (window_pane_spawn(wp, data->arg, NULL, env) != 0) { if (window_pane_spawn(wp, data->arg, NULL, env, &cause) != 0) {
ctx->error(ctx, "respawn failed: %s:%d", s->name, wl->idx); ctx->error(ctx, "respawn window failed: %s", cause);
xfree(cause);
return (-1); return (-1);
} }
screen_reinit(&wp->base); screen_reinit(&wp->base);

11
cmd-split-window.c
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@ -1,4 +1,4 @@
/* $Id: cmd-split-window.c,v 1.7 2009-01-21 19:38:51 nicm Exp $ */ /* $Id: cmd-split-window.c,v 1.8 2009-01-23 16:59:14 nicm Exp $ */
/* /*
* Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net> * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
@ -140,8 +140,7 @@ cmd_split_window_exec(struct cmd *self, struct cmd_ctx *ctx)
struct window *w; struct window *w;
struct window_pane *wp; struct window_pane *wp;
const char *env[] = CHILD_ENVIRON; const char *env[] = CHILD_ENVIRON;
char buf[256]; char buf[256], *cmd, *cwd, *cause;
char *cmd, *cwd;
u_int i, hlimit, lines; u_int i, hlimit, lines;
if ((wl = cmd_find_window(ctx, data->target, &s)) == NULL) if ((wl = cmd_find_window(ctx, data->target, &s)) == NULL)
@ -168,8 +167,10 @@ cmd_split_window_exec(struct cmd *self, struct cmd_ctx *ctx)
lines = (w->active->sy * data->percentage) / 100; lines = (w->active->sy * data->percentage) / 100;
hlimit = options_get_number(&s->options, "history-limit"); hlimit = options_get_number(&s->options, "history-limit");
if ((wp = window_add_pane(w, lines, cmd, cwd, env, hlimit)) == NULL) { wp = window_add_pane(w, lines, cmd, cwd, env, hlimit, &cause);
ctx->error(ctx, "command failed: %s", cmd); if (wp == NULL) {
ctx->error(ctx, "create pane failed: %s", cause);
xfree(cause);
return (-1); return (-1);
} }
server_redraw_window(w); server_redraw_window(w);

22
session.c
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@ -1,4 +1,4 @@
/* $Id: session.c,v 1.51 2009-01-18 18:31:45 nicm Exp $ */ /* $Id: session.c,v 1.52 2009-01-23 16:59:14 nicm Exp $ */
/* /*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net> * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@ -112,8 +112,8 @@ session_find(const char *name)
/* Create a new session. */ /* Create a new session. */
struct session * struct session *
session_create( session_create(const char *name,
const char *name, const char *cmd, const char *cwd, u_int sx, u_int sy) const char *cmd, const char *cwd, u_int sx, u_int sy, char **cause)
{ {
struct session *s; struct session *s;
u_int i; u_int i;
@ -145,7 +145,7 @@ session_create(
s->name = xstrdup(name); s->name = xstrdup(name);
else else
xasprintf(&s->name, "%u", i); xasprintf(&s->name, "%u", i);
if (session_new(s, NULL, cmd, cwd, -1) == NULL) { if (session_new(s, NULL, cmd, cwd, -1, cause) == NULL) {
session_destroy(s); session_destroy(s);
return (NULL); return (NULL);
} }
@ -197,7 +197,7 @@ session_index(struct session *s, u_int *i)
/* Create a new window on a session. */ /* Create a new window on a session. */
struct winlink * struct winlink *
session_new(struct session *s, session_new(struct session *s,
const char *name, const char *cmd, const char *cwd, int idx) const char *name, const char *cmd, const char *cwd, int idx, char **cause)
{ {
struct window *w; struct window *w;
const char *env[] = CHILD_ENVIRON; const char *env[] = CHILD_ENVIRON;
@ -210,18 +210,22 @@ session_new(struct session *s,
env[0] = buf; env[0] = buf;
hlimit = options_get_number(&s->options, "history-limit"); hlimit = options_get_number(&s->options, "history-limit");
w = window_create(name, cmd, cwd, env, s->sx, s->sy, hlimit); w = window_create(name, cmd, cwd, env, s->sx, s->sy, hlimit, cause);
if (w == NULL) if (w == NULL)
return (NULL); return (NULL);
return (session_attach(s, w, idx)); return (session_attach(s, w, idx, cause));
} }
/* Attach a window to a session. */ /* Attach a window to a session. */
struct winlink * struct winlink *
session_attach(struct session *s, struct window *w, int idx) session_attach(struct session *s, struct window *w, int idx, char **cause)
{ {
return (winlink_add(&s->windows, w, idx)); struct winlink *wl;
if ((wl = winlink_add(&s->windows, w, idx)) == NULL)
xasprintf(cause, "index in use: %d", idx);
return (wl);
} }
/* Detach a window from a session. */ /* Detach a window from a session. */

17
tmux.h
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@ -1,4 +1,4 @@
/* $Id: tmux.h,v 1.247 2009-01-21 22:47:31 nicm Exp $ */ /* $Id: tmux.h,v 1.248 2009-01-23 16:59:14 nicm Exp $ */
/* /*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net> * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@ -1419,12 +1419,12 @@ void winlink_stack_push(struct winlink_stack *, struct winlink *);
void winlink_stack_remove(struct winlink_stack *, struct winlink *); void winlink_stack_remove(struct winlink_stack *, struct winlink *);
int window_index(struct window *, u_int *); int window_index(struct window *, u_int *);
struct window *window_create(const char *, const char *, struct window *window_create(const char *, const char *,
const char *, const char **, u_int, u_int, u_int); const char *, const char **, u_int, u_int, u_int, char **);
void window_destroy(struct window *); void window_destroy(struct window *);
int window_resize(struct window *, u_int, u_int); int window_resize(struct window *, u_int, u_int);
void window_set_active_pane(struct window *, struct window_pane *); void window_set_active_pane(struct window *, struct window_pane *);
struct window_pane *window_add_pane(struct window *, int, struct window_pane *window_add_pane(struct window *, int,
const char *, const char *, const char **, u_int); const char *, const char *, const char **, u_int, char **);
void window_remove_pane(struct window *, struct window_pane *); void window_remove_pane(struct window *, struct window_pane *);
u_int window_index_of_pane(struct window *, struct window_pane *); u_int window_index_of_pane(struct window *, struct window_pane *);
struct window_pane *window_pane_at_index(struct window *, u_int); struct window_pane *window_pane_at_index(struct window *, u_int);
@ -1435,7 +1435,7 @@ void window_destroy_panes(struct window *);
struct window_pane *window_pane_create(struct window *, u_int, u_int, u_int); struct window_pane *window_pane_create(struct window *, u_int, u_int, u_int);
void window_pane_destroy(struct window_pane *); void window_pane_destroy(struct window_pane *);
int window_pane_spawn(struct window_pane *, int window_pane_spawn(struct window_pane *,
const char *, const char *, const char **); const char *, const char *, const char **, char **);
int window_pane_resize(struct window_pane *, u_int, u_int); int window_pane_resize(struct window_pane *, u_int, u_int);
void window_calculate_sizes(struct window *); void window_calculate_sizes(struct window *);
int window_pane_set_mode( int window_pane_set_mode(
@ -1478,13 +1478,14 @@ void session_alert_cancel(struct session *, struct winlink *);
int session_alert_has(struct session *, struct winlink *, int); int session_alert_has(struct session *, struct winlink *, int);
int session_alert_has_window(struct session *, struct window *, int); int session_alert_has_window(struct session *, struct window *, int);
struct session *session_find(const char *); struct session *session_find(const char *);
struct session *session_create( struct session *session_create(const char *, const char *,
const char *, const char *, const char *, u_int, u_int); const char *, u_int, u_int, char **);
void session_destroy(struct session *); void session_destroy(struct session *);
int session_index(struct session *, u_int *); int session_index(struct session *, u_int *);
struct winlink *session_new(struct session *, struct winlink *session_new(struct session *,
const char *, const char *, const char *, int); const char *, const char *, const char *, int, char **);
struct winlink *session_attach(struct session *, struct window *, int); struct winlink *session_attach(
struct session *, struct window *, int, char **);
int session_detach(struct session *, struct winlink *); int session_detach(struct session *, struct winlink *);
int session_has(struct session *, struct window *); int session_has(struct session *, struct window *);
int session_next(struct session *, int); int session_next(struct session *, int);

25
window.c
View File

@ -1,4 +1,4 @@
/* $Id: window.c,v 1.61 2009-01-21 19:38:51 nicm Exp $ */ /* $Id: window.c,v 1.62 2009-01-23 16:59:14 nicm Exp $ */
/* /*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net> * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@ -19,6 +19,7 @@
#include <sys/types.h> #include <sys/types.h>
#include <sys/ioctl.h> #include <sys/ioctl.h>
#include <errno.h>
#include <fcntl.h> #include <fcntl.h>
#include <signal.h> #include <signal.h>
#include <stdint.h> #include <stdint.h>
@ -200,13 +201,14 @@ window_index(struct window *s, u_int *i)
} }
struct window * struct window *
window_create(const char *name, const char *cmd, window_create(const char *name, const char *cmd, const char *cwd,
const char *cwd, const char **envp, u_int sx, u_int sy, u_int hlimit) const char **envp, u_int sx, u_int sy, u_int hlimit, char **cause)
{ {
struct window *w; struct window *w;
u_int i; u_int i;
w = xmalloc(sizeof *w); w = xmalloc(sizeof *w);
w->name = NULL;
w->flags = 0; w->flags = 0;
TAILQ_INIT(&w->panes); TAILQ_INIT(&w->panes);
@ -228,7 +230,7 @@ window_create(const char *name, const char *cmd,
ARRAY_ADD(&windows, w); ARRAY_ADD(&windows, w);
w->references = 0; w->references = 0;
if (window_add_pane(w, -1, cmd, cwd, envp, hlimit) == NULL) { if (window_add_pane(w, -1, cmd, cwd, envp, hlimit, cause) == NULL) {
window_destroy(w); window_destroy(w);
return (NULL); return (NULL);
} }
@ -257,7 +259,8 @@ window_destroy(struct window *w)
window_destroy_panes(w); window_destroy_panes(w);
xfree(w->name); if (w->name != NULL)
xfree(w->name);
xfree(w); xfree(w);
} }
@ -378,8 +381,8 @@ window_set_active_pane(struct window *w, struct window_pane *wp)
} }
struct window_pane * struct window_pane *
window_add_pane(struct window *w, int wanty, window_add_pane(struct window *w, int wanty, const char *cmd,
const char *cmd, const char *cwd, const char **envp, u_int hlimit) const char *cwd, const char **envp, u_int hlimit, char **cause)
{ {
struct window_pane *wp; struct window_pane *wp;
u_int sizey; u_int sizey;
@ -408,7 +411,7 @@ window_add_pane(struct window *w, int wanty,
else else
TAILQ_INSERT_AFTER(&w->panes, w->active, wp, entry); TAILQ_INSERT_AFTER(&w->panes, w->active, wp, entry);
window_update_panes(w); window_update_panes(w);
if (window_pane_spawn(wp, cmd, cwd, envp) != 0) { if (window_pane_spawn(wp, cmd, cwd, envp, cause) != 0) {
window_remove_pane(w, wp); window_remove_pane(w, wp);
return (NULL); return (NULL);
} }
@ -535,7 +538,7 @@ window_pane_destroy(struct window_pane *wp)
int int
window_pane_spawn(struct window_pane *wp, window_pane_spawn(struct window_pane *wp,
const char *cmd, const char *cwd, const char **envp) const char *cmd, const char *cwd, const char **envp, char **cause)
{ {
struct winsize ws; struct winsize ws;
int mode; int mode;
@ -568,7 +571,9 @@ window_pane_spawn(struct window_pane *wp,
switch (forkpty(&wp->fd, NULL, NULL, &ws)) { switch (forkpty(&wp->fd, NULL, NULL, &ws)) {
case -1: case -1:
return (1); wp->fd = -1;
xasprintf(cause, "%s: %s", cmd, strerror(errno));
return (-1);
case 0: case 0:
if (chdir(wp->cwd) != 0) if (chdir(wp->cwd) != 0)
chdir("/"); chdir("/");