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/* $OpenBSD: cmd-if-shell.c,v 1.2 2009/07/13 23:11:35 nicm Exp $ */
/*
* Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "tmux.h"
/*
* Executes a tmux command if a shell command returns true.
*/
int cmd_if_shell_parse(struct cmd *, int, char **, char **);
int cmd_if_shell_exec(struct cmd *, struct cmd_ctx *);
void cmd_if_shell_send(struct cmd *, struct buffer *);
void cmd_if_shell_recv(struct cmd *, struct buffer *);
void cmd_if_shell_free(struct cmd *);
void cmd_if_shell_init(struct cmd *, int);
size_t cmd_if_shell_print(struct cmd *, char *, size_t);
struct cmd_if_shell_data {
char *cmd;
char *sh_cmd;
};
const struct cmd_entry cmd_if_shell_entry = {
"if-shell", "if",
"shell-command command",
0, 0,
cmd_if_shell_init,
cmd_if_shell_parse,
cmd_if_shell_exec,
cmd_if_shell_send,
cmd_if_shell_recv,
cmd_if_shell_free,
cmd_if_shell_print
};
void
cmd_if_shell_init(struct cmd *self, unused int arg)
{
struct cmd_if_shell_data *data;
self->data = data = xmalloc(sizeof *data);
data->cmd = NULL;
data->sh_cmd = NULL;
}
int
cmd_if_shell_parse(struct cmd *self, int argc, char **argv, char **cause)
{
struct cmd_if_shell_data *data;
int opt;
self->entry->init(self, 0);
data = self->data;
while ((opt = getopt(argc, argv, "")) != -1) {
switch (opt) {
default:
goto usage;
}
}
argc -= optind;
argv += optind;
if (argc != 2)
goto usage;
data->sh_cmd = xstrdup(argv[0]);
data->cmd = xstrdup(argv[1]);
return (0);
usage:
xasprintf(cause, "usage: %s %s", self->entry->name, self->entry->usage);
self->entry->free(self);
return (-1);
}
int
cmd_if_shell_exec(struct cmd *self, struct cmd_ctx *ctx)
{
struct cmd_if_shell_data *data = self->data;
struct cmd_list *cmdlist;
char *cause;
int ret;
if ((ret = system(data->sh_cmd)) < 0) {
ctx->error(ctx, "system error: %s", strerror(errno));
return (-1);
} else if (ret != 0)
return (0);
if (cmd_string_parse(data->cmd, &cmdlist, &cause) != 0) {
if (cause != NULL) {
ctx->error(ctx, "%s", cause);
xfree(cause);
}
return (-1);
}
if (cmd_list_exec(cmdlist, ctx) < 0) {
cmd_list_free(cmdlist);
return (-1);
}
cmd_list_free(cmdlist);
return (0);
}
void
cmd_if_shell_send(struct cmd *self, struct buffer *b)
{
struct cmd_if_shell_data *data = self->data;
buffer_write(b, data, sizeof *data);
cmd_send_string(b, data->cmd);
cmd_send_string(b, data->sh_cmd);
}
void
cmd_if_shell_recv(struct cmd *self, struct buffer *b)
{
struct cmd_if_shell_data *data;
self->data = data = xmalloc(sizeof *data);
buffer_read(b, data, sizeof *data);
data->cmd = cmd_recv_string(b);
data->sh_cmd = cmd_recv_string(b);
}
void
cmd_if_shell_free(struct cmd *self)
{
struct cmd_if_shell_data *data = self->data;
if (data->cmd != NULL)
xfree(data->cmd);
if (data->sh_cmd != NULL)
xfree(data->sh_cmd);
xfree(data);
}
size_t
cmd_if_shell_print(struct cmd *self, char *buf, size_t len)
{
struct cmd_if_shell_data *data = self->data;
size_t off = 0;
off += xsnprintf(buf, len, "%s", self->entry->name);
if (data == NULL)
return (off);
if (off < len && data->sh_cmd != NULL)
off += cmd_prarg(buf + off, len - off, " ", data->sh_cmd);
if (off < len && data->cmd != NULL)
off += cmd_prarg(buf + off, len - off, " ", data->cmd);
return (off);
}
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