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Annotation of src/usr.bin/tmux/cmd-save-buffer.c, Revision 1.7

1.7     ! nicm        1: /* $OpenBSD: cmd-save-buffer.c,v 1.6 2009/11/13 19:53:29 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>
                     23: #include <string.h>
                     24:
                     25: #include "tmux.h"
                     26:
                     27: /*
                     28:  * Saves a session paste buffer to a file.
                     29:  */
                     30:
                     31: int    cmd_save_buffer_exec(struct cmd *, struct cmd_ctx *);
                     32:
                     33: const struct cmd_entry cmd_save_buffer_entry = {
                     34:        "save-buffer", "saveb",
                     35:        "[-a] " CMD_BUFFER_SESSION_USAGE " path",
1.6       nicm       36:        CMD_ARG1, "a",
1.1       nicm       37:        cmd_buffer_init,
                     38:        cmd_buffer_parse,
                     39:        cmd_save_buffer_exec,
                     40:        cmd_buffer_free,
                     41:        cmd_buffer_print
                     42: };
                     43:
                     44: int
                     45: cmd_save_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
                     46: {
                     47:        struct cmd_buffer_data  *data = self->data;
                     48:        struct session          *s;
                     49:        struct paste_buffer     *pb;
                     50:        mode_t                  mask;
1.7     ! nicm       51:        FILE                    *f, *close_f;
1.1       nicm       52:
                     53:        if ((s = cmd_find_session(ctx, data->target)) == NULL)
                     54:                return (-1);
                     55:
                     56:        if (data->buffer == -1) {
                     57:                if ((pb = paste_get_top(&s->buffers)) == NULL) {
                     58:                        ctx->error(ctx, "no buffers");
                     59:                        return (-1);
                     60:                }
                     61:        } else {
                     62:                if ((pb = paste_get_index(&s->buffers, data->buffer)) == NULL) {
                     63:                        ctx->error(ctx, "no buffer %d", data->buffer);
                     64:                        return (-1);
                     65:                }
                     66:        }
                     67:
1.7     ! nicm       68:        if (strcmp(data->arg, "-") == 0) {
        !            69:                if (ctx->cmdclient == NULL) {
        !            70:                        ctx->error(ctx, "%s: can't write to stdout", data->arg);
        !            71:                        return (-1);
        !            72:                }
        !            73:                f = ctx->cmdclient->stdout_file;
        !            74:                close_f = NULL;
        !            75:        } else {
        !            76:                mask = umask(S_IRWXG | S_IRWXO);
        !            77:                if (cmd_check_flag(data->chflags, 'a'))
        !            78:                        f = fopen(data->arg, "ab");
        !            79:                else
        !            80:                        f = fopen(data->arg, "wb");
        !            81:                umask(mask);
        !            82:                if (f == NULL) {
        !            83:                        ctx->error(ctx, "%s: %s", data->arg, strerror(errno));
        !            84:                        return (-1);
        !            85:                }
        !            86:                close_f = f;
1.1       nicm       87:        }
                     88:
1.4       nicm       89:        if (fwrite(pb->data, 1, pb->size, f) != pb->size) {
1.1       nicm       90:                ctx->error(ctx, "%s: fwrite error", data->arg);
                     91:                fclose(f);
                     92:                return (-1);
                     93:        }
                     94:
1.7     ! nicm       95:        if (close_f != NULL)
        !            96:                fclose(close_f);
1.1       nicm       97:
                     98:        return (0);
                     99: }