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Annotation of src/usr.bin/tmux/cmd-save-buffer.c, Revision 1.54

1.54    ! nicm        1: /* $OpenBSD: cmd-save-buffer.c,v 1.53 2021/08/20 19:50:16 nicm Exp $ */
1.1       nicm        2:
                      3: /*
                      4:  * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
                      5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
                      7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
                      9:  *
                     10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
                     15:  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
                     16:  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     17:  */
                     18:
                     19: #include <sys/types.h>
                     20: #include <sys/stat.h>
                     21:
                     22: #include <errno.h>
1.21      nicm       23: #include <fcntl.h>
1.15      nicm       24: #include <stdlib.h>
1.1       nicm       25: #include <string.h>
1.21      nicm       26: #include <unistd.h>
1.18      nicm       27: #include <vis.h>
1.1       nicm       28:
                     29: #include "tmux.h"
                     30:
                     31: /*
1.11      nicm       32:  * Saves a paste buffer to a file.
1.1       nicm       33:  */
                     34:
1.40      nicm       35: static enum cmd_retval cmd_save_buffer_exec(struct cmd *, struct cmdq_item *);
1.1       nicm       36:
                     37: const struct cmd_entry cmd_save_buffer_entry = {
1.36      nicm       38:        .name = "save-buffer",
                     39:        .alias = "saveb",
                     40:
1.54    ! nicm       41:        .args = { "ab:", 1, 1, NULL },
1.36      nicm       42:        .usage = "[-a] " CMD_BUFFER_USAGE " path",
                     43:
1.39      nicm       44:        .flags = CMD_AFTERHOOK,
1.36      nicm       45:        .exec = cmd_save_buffer_exec
1.1       nicm       46: };
                     47:
1.18      nicm       48: const struct cmd_entry cmd_show_buffer_entry = {
1.36      nicm       49:        .name = "show-buffer",
                     50:        .alias = "showb",
                     51:
1.54    ! nicm       52:        .args = { "b:", 0, 0, NULL },
1.36      nicm       53:        .usage = CMD_BUFFER_USAGE,
                     54:
1.39      nicm       55:        .flags = CMD_AFTERHOOK,
1.36      nicm       56:        .exec = cmd_save_buffer_exec
1.18      nicm       57: };
                     58:
1.47      nicm       59: static void
                     60: cmd_save_buffer_done(__unused struct client *c, const char *path, int error,
                     61:     __unused int closed, __unused struct evbuffer *buffer, void *data)
                     62: {
                     63:        struct cmdq_item        *item = data;
                     64:
                     65:        if (!closed)
                     66:                return;
                     67:
                     68:        if (error != 0)
                     69:                cmdq_error(item, "%s: %s", path, strerror(error));
                     70:        cmdq_continue(item);
                     71: }
                     72:
1.38      nicm       73: static enum cmd_retval
1.40      nicm       74: cmd_save_buffer_exec(struct cmd *self, struct cmdq_item *item)
1.1       nicm       75: {
1.48      nicm       76:        struct args             *args = cmd_get_args(self);
1.51      nicm       77:        struct client           *c = cmdq_get_client(item);
1.1       nicm       78:        struct paste_buffer     *pb;
1.47      nicm       79:        int                      flags;
                     80:        const char              *bufname = args_get(args, 'b'), *bufdata;
                     81:        size_t                   bufsize;
1.51      nicm       82:        char                    *path, *tmp;
1.1       nicm       83:
1.47      nicm       84:        if (bufname == NULL) {
1.29      nicm       85:                if ((pb = paste_get_top(NULL)) == NULL) {
1.40      nicm       86:                        cmdq_error(item, "no buffers");
1.16      nicm       87:                        return (CMD_RETURN_ERROR);
1.1       nicm       88:                }
                     89:        } else {
1.25      nicm       90:                pb = paste_get_name(bufname);
1.9       nicm       91:                if (pb == NULL) {
1.40      nicm       92:                        cmdq_error(item, "no buffer %s", bufname);
1.16      nicm       93:                        return (CMD_RETURN_ERROR);
1.1       nicm       94:                }
                     95:        }
1.29      nicm       96:        bufdata = paste_buffer_data(pb, &bufsize);
1.1       nicm       97:
1.51      nicm       98:        if (cmd_get_entry(self) == &cmd_show_buffer_entry) {
                     99:                if (c->session != NULL || (c->flags & CLIENT_CONTROL)) {
                    100:                        utf8_stravisx(&tmp, bufdata, bufsize,
                    101:                            VIS_OCTAL|VIS_CSTYLE|VIS_TAB);
                    102:                        cmdq_print(item, "%s", tmp);
                    103:                        free(tmp);
                    104:                        return (CMD_RETURN_NORMAL);
                    105:                }
1.44      nicm      106:                path = xstrdup("-");
1.51      nicm      107:        } else
1.53      nicm      108:                path = format_single_from_target(item, args_string(args, 0));
1.48      nicm      109:        if (args_has(args, 'a'))
1.47      nicm      110:                flags = O_APPEND;
                    111:        else
1.52      nicm      112:                flags = O_TRUNC;
1.49      nicm      113:        file_write(cmdq_get_client(item), path, flags, bufdata, bufsize,
1.47      nicm      114:            cmd_save_buffer_done, item);
1.45      nicm      115:        free(path);
                    116:
1.47      nicm      117:        return (CMD_RETURN_WAIT);
1.1       nicm      118: }