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Add a command queue to standardize and simplify commands that call other

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commands and allow a command to block execution of subsequent
commands. This allows run-shell and if-shell to be synchronous which has
been much requested.

Each client has a default command queue and commands are consumed one at
a time from it. A command may suspend execution from the queue by
returning CMD_RETURN_WAIT and then resume it by calling cmd_continue() -
for example run-shell does this from the callback that is fired after
the job is freed.

When the command queue becomes empty, command clients are automatically
exited (unless attaching). A callback is also fired - this is used for
nested commands in, for example, if-shell which can block execution of
the client's cmdq until a new cmdq becomes empty.

Also merge all the old error/info/print functions together and lose the
old curclient/cmdclient distinction - a cmdq is bound to one client (or
none if in the configuration file), this is a command client if
c->session is NULL otherwise an attached client.
This commit is contained in:
Nicholas Marriott
2013-03-24 09:54:10 +00:00
parent 66edb3392b
commit 20636d956d
84 changed files with 1240 additions and 1187 deletions
Download Patch File Download Diff File Expand all files Collapse all files

140
cmd-save-buffer.c
View File

@@ -22,6 +22,7 @@
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <vis.h>
#include "tmux.h"
@@ -29,7 +30,7 @@
* Saves a paste buffer to a file.
*/
enum cmd_retval cmd_save_buffer_exec(struct cmd *, struct cmd_ctx *);
enum cmd_retval cmd_save_buffer_exec(struct cmd *, struct cmd_q *);
const struct cmd_entry cmd_save_buffer_entry = {
"save-buffer", "saveb",
@@ -41,83 +42,132 @@ const struct cmd_entry cmd_save_buffer_entry = {
cmd_save_buffer_exec
};
const struct cmd_entry cmd_show_buffer_entry = {
"show-buffer", "showb",
"b:", 0, 0,
CMD_BUFFER_USAGE,
0,
NULL,
NULL,
cmd_save_buffer_exec
};
enum cmd_retval
cmd_save_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
cmd_save_buffer_exec(struct cmd *self, struct cmd_q *cmdq)
{
struct args *args = self->args;
struct client *c;
struct session *s;
struct paste_buffer *pb;
const char *path, *newpath, *wd;
char *cause;
char *cause, *start, *end;
size_t size, used;
int buffer;
mode_t mask;
FILE *f;
char *msg;
size_t msglen;
if (!args_has(args, 'b')) {
if ((pb = paste_get_top(&global_buffers)) == NULL) {
ctx->error(ctx, "no buffers");
cmdq_error(cmdq, "no buffers");
return (CMD_RETURN_ERROR);
}
} else {
buffer = args_strtonum(args, 'b', 0, INT_MAX, &cause);
if (cause != NULL) {
ctx->error(ctx, "buffer %s", cause);
cmdq_error(cmdq, "buffer %s", cause);
free(cause);
return (CMD_RETURN_ERROR);
}
pb = paste_get_index(&global_buffers, buffer);
if (pb == NULL) {
ctx->error(ctx, "no buffer %d", buffer);
cmdq_error(cmdq, "no buffer %d", buffer);
return (CMD_RETURN_ERROR);
}
}
path = args->argv[0];
if (self->entry == &cmd_show_buffer_entry)
path = "-";
else
path = args->argv[0];
if (strcmp(path, "-") == 0) {
c = ctx->curclient;
if (c == NULL || !(c->flags & CLIENT_CONTROL))
c = ctx->cmdclient;
c = cmdq->client;
if (c == NULL) {
ctx->error(ctx, "can't write to stdout");
cmdq_error(cmdq, "can't write to stdout");
return (CMD_RETURN_ERROR);
}
evbuffer_add(c->stdout_data, pb->data, pb->size);
server_push_stdout(c);
} else {
c = ctx->cmdclient;
if (c != NULL)
wd = c->cwd;
else if ((s = cmd_current_session(ctx, 0)) != NULL) {
wd = options_get_string(&s->options, "default-path");
if (*wd == '\0')
wd = s->cwd;
} else
wd = NULL;
if (wd != NULL && *wd != '\0') {
newpath = get_full_path(wd, path);
if (newpath != NULL)
path = newpath;
}
mask = umask(S_IRWXG | S_IRWXO);
if (args_has(self->args, 'a'))
f = fopen(path, "ab");
else
f = fopen(path, "wb");
umask(mask);
if (f == NULL) {
ctx->error(ctx, "%s: %s", path, strerror(errno));
return (CMD_RETURN_ERROR);
}
if (fwrite(pb->data, 1, pb->size, f) != pb->size) {
ctx->error(ctx, "%s: fwrite error", path);
fclose(f);
return (CMD_RETURN_ERROR);
}
fclose(f);
if (c->session == NULL || (c->flags & CLIENT_CONTROL))
goto do_stdout;
goto do_print;
}
c = cmdq->client;
if (c != NULL)
wd = c->cwd;
else if ((s = cmd_current_session(cmdq, 0)) != NULL) {
wd = options_get_string(&s->options, "default-path");
if (*wd == '\0')
wd = s->cwd;
} else
wd = NULL;
if (wd != NULL && *wd != '\0') {
newpath = get_full_path(wd, path);
if (newpath != NULL)
path = newpath;
}
mask = umask(S_IRWXG | S_IRWXO);
if (args_has(self->args, 'a'))
f = fopen(path, "ab");
else
f = fopen(path, "wb");
umask(mask);
if (f == NULL) {
cmdq_error(cmdq, "%s: %s", path, strerror(errno));
return (CMD_RETURN_ERROR);
}
if (fwrite(pb->data, 1, pb->size, f) != pb->size) {
cmdq_error(cmdq, "%s: fwrite error", path);
fclose(f);
return (CMD_RETURN_ERROR);
}
fclose(f);
return (CMD_RETURN_NORMAL);
do_stdout:
evbuffer_add(c->stdout_data, pb->data, pb->size);
server_push_stdout(c);
return (CMD_RETURN_NORMAL);
do_print:
if (pb->size > (INT_MAX / 4) - 1) {
cmdq_error(cmdq, "buffer too big");
return (CMD_RETURN_ERROR);
}
msg = NULL;
msglen = 0;
used = 0;
while (used != pb->size) {
start = pb->data + used;
end = memchr(start, '\n', pb->size - used);
if (end != NULL)
size = end - start;
else
size = pb->size - used;
msglen = size * 4 + 1;
msg = xrealloc(msg, 1, msglen);
strvisx(msg, start, size, VIS_OCTAL|VIS_TAB);
cmdq_print(cmdq, "%s", msg);
used += size + (end != NULL);
}
free(msg);
return (CMD_RETURN_NORMAL);
}