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ptyfwd: optionally override terminal width/height

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This commit is contained in:
Lennart Poettering 2018-07-24 17:15:33 +02:00
parent de321f5228
commit d435a18244
2 changed files with 46 additions and 2 deletions
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46
src/shared/ptyfwd.c
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@ -392,11 +392,14 @@ int pty_forward_new(
struct winsize ws;
int r;
f = new0(PTYForward, 1);
f = new(PTYForward, 1);
if (!f)
return -ENOMEM;
f->flags = flags;
*f = (struct PTYForward) {
.flags = flags,
.master = -1,
};
if (event)
f->event = sd_event_ref(event);
@ -587,3 +590,42 @@ int pty_forward_set_priority(PTYForward *f, int64_t priority) {
return 0;
}
int pty_forward_set_width_height(PTYForward *f, unsigned width, unsigned height) {
struct winsize ws;
assert(f);
if (width == (unsigned) -1 && height == (unsigned) -1)
return 0; /* noop */
if (width != (unsigned) -1 &&
(width == 0 || width > USHRT_MAX))
return -ERANGE;
if (height != (unsigned) -1 &&
(height == 0 || height > USHRT_MAX))
return -ERANGE;
if (width == (unsigned) -1 || height == (unsigned) -1) {
if (ioctl(f->master, TIOCGWINSZ, &ws) < 0)
return -errno;
if (width != (unsigned) -1)
ws.ws_col = width;
if (height != (unsigned) -1)
ws.ws_row = height;
} else
ws = (struct winsize) {
.ws_row = height,
.ws_col = width,
};
if (ioctl(f->master, TIOCSWINSZ, &ws) < 0)
return -errno;
/* Make sure we ignore SIGWINCH window size events from now on */
f->sigwinch_event_source = sd_event_source_unref(f->sigwinch_event_source);
return 0;
}

2
src/shared/ptyfwd.h
View File

@ -37,4 +37,6 @@ bool pty_forward_drain(PTYForward *f);
int pty_forward_set_priority(PTYForward *f, int64_t priority);
int pty_forward_set_width_height(PTYForward *f, unsigned width, unsigned height);
DEFINE_TRIVIAL_CLEANUP_FUNC(PTYForward*, pty_forward_free);