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Annotation of src/usr.bin/tmux/cmd-save-buffer.c, Revision 1.10

1.10    ! nicm        1: /* $OpenBSD: cmd-save-buffer.c,v 1.9 2010/12/30 23:16:18 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",
1.10    ! nicm       35:        "ab:", 1, 1,
        !            36:        "[-a] " CMD_BUFFER_USAGE,
        !            37:        0,
        !            38:        NULL,
        !            39:        NULL,
        !            40:        cmd_save_buffer_exec
1.1       nicm       41: };
                     42:
                     43: int
                     44: cmd_save_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
                     45: {
1.10    ! nicm       46:        struct args             *args = self->args;
        !            47:        struct client           *c = ctx->cmdclient;
1.1       nicm       48:        struct paste_buffer     *pb;
1.10    ! nicm       49:        const char              *path;
        !            50:        char                    *cause;
        !            51:        int                      buffer;
1.8       nicm       52:        mode_t                   mask;
                     53:        FILE                    *f;
1.1       nicm       54:
1.10    ! nicm       55:        if (!args_has(args, 'b')) {
1.9       nicm       56:                if ((pb = paste_get_top(&global_buffers)) == NULL) {
1.1       nicm       57:                        ctx->error(ctx, "no buffers");
                     58:                        return (-1);
                     59:                }
                     60:        } else {
1.10    ! nicm       61:                buffer = args_strtonum(args, 'b', 0, INT_MAX, &cause);
        !            62:                if (cause != NULL) {
        !            63:                        ctx->error(ctx, "buffer %s", cause);
        !            64:                        xfree(cause);
        !            65:                        return (-1);
        !            66:                }
        !            67:
        !            68:                pb = paste_get_index(&global_buffers, buffer);
1.9       nicm       69:                if (pb == NULL) {
1.10    ! nicm       70:                        ctx->error(ctx, "no buffer %d", buffer);
1.1       nicm       71:                        return (-1);
                     72:                }
                     73:        }
                     74:
1.10    ! nicm       75:        path = args->argv[0];
        !            76:        if (strcmp(path, "-") == 0) {
        !            77:                if (c == NULL) {
        !            78:                        ctx->error(ctx, "%s: can't write to stdout", path);
1.7       nicm       79:                        return (-1);
                     80:                }
1.10    ! nicm       81:                bufferevent_write(c->stdout_event, pb->data, pb->size);
1.7       nicm       82:        } else {
                     83:                mask = umask(S_IRWXG | S_IRWXO);
1.10    ! nicm       84:                if (args_has(self->args, 'a'))
        !            85:                        f = fopen(path, "ab");
1.7       nicm       86:                else
1.10    ! nicm       87:                        f = fopen(path, "wb");
1.7       nicm       88:                umask(mask);
                     89:                if (f == NULL) {
1.10    ! nicm       90:                        ctx->error(ctx, "%s: %s", path, strerror(errno));
1.7       nicm       91:                        return (-1);
                     92:                }
1.8       nicm       93:                if (fwrite(pb->data, 1, pb->size, f) != pb->size) {
1.10    ! nicm       94:                        ctx->error(ctx, "%s: fwrite error", path);
1.8       nicm       95:                        fclose(f);
                     96:                        return (-1);
                     97:                }
                     98:                fclose(f);
1.1       nicm       99:        }
                    100:
                    101:        return (0);
                    102: }