| /* $Id: cmd-if-shell.c,v 1.2 2009-07-09 18:16:36 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, |
| 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); |
| } |