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Annotation of src/usr.bin/tmux/cmd-save-buffer.c, Revision 1.15

1.15    ! nicm        1: /* $OpenBSD: cmd-save-buffer.c,v 1.14 2012/05/21 18:27:42 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>
1.15    ! nicm       23: #include <stdlib.h>
1.1       nicm       24: #include <string.h>
                     25:
                     26: #include "tmux.h"
                     27:
                     28: /*
1.11      nicm       29:  * Saves a paste buffer to a file.
1.1       nicm       30:  */
                     31:
                     32: int    cmd_save_buffer_exec(struct cmd *, struct cmd_ctx *);
                     33:
                     34: const struct cmd_entry cmd_save_buffer_entry = {
                     35:        "save-buffer", "saveb",
1.10      nicm       36:        "ab:", 1, 1,
1.13      nicm       37:        "[-a] " CMD_BUFFER_USAGE " path",
1.10      nicm       38:        0,
                     39:        NULL,
                     40:        NULL,
                     41:        cmd_save_buffer_exec
1.1       nicm       42: };
                     43:
                     44: int
                     45: cmd_save_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
                     46: {
1.10      nicm       47:        struct args             *args = self->args;
                     48:        struct client           *c = ctx->cmdclient;
1.12      nicm       49:        struct session          *s;
1.1       nicm       50:        struct paste_buffer     *pb;
1.12      nicm       51:        const char              *path, *newpath, *wd;
1.10      nicm       52:        char                    *cause;
                     53:        int                      buffer;
1.8       nicm       54:        mode_t                   mask;
                     55:        FILE                    *f;
1.1       nicm       56:
1.10      nicm       57:        if (!args_has(args, 'b')) {
1.9       nicm       58:                if ((pb = paste_get_top(&global_buffers)) == NULL) {
1.1       nicm       59:                        ctx->error(ctx, "no buffers");
                     60:                        return (-1);
                     61:                }
                     62:        } else {
1.10      nicm       63:                buffer = args_strtonum(args, 'b', 0, INT_MAX, &cause);
                     64:                if (cause != NULL) {
                     65:                        ctx->error(ctx, "buffer %s", cause);
1.15    ! nicm       66:                        free(cause);
1.10      nicm       67:                        return (-1);
                     68:                }
                     69:
                     70:                pb = paste_get_index(&global_buffers, buffer);
1.9       nicm       71:                if (pb == NULL) {
1.10      nicm       72:                        ctx->error(ctx, "no buffer %d", buffer);
1.1       nicm       73:                        return (-1);
                     74:                }
                     75:        }
                     76:
1.10      nicm       77:        path = args->argv[0];
                     78:        if (strcmp(path, "-") == 0) {
                     79:                if (c == NULL) {
                     80:                        ctx->error(ctx, "%s: can't write to stdout", path);
1.7       nicm       81:                        return (-1);
                     82:                }
1.14      nicm       83:                evbuffer_add(c->stdout_data, pb->data, pb->size);
                     84:                server_push_stdout(c);
1.7       nicm       85:        } else {
1.12      nicm       86:                if (c != NULL)
                     87:                        wd = c->cwd;
                     88:                else if ((s = cmd_current_session(ctx, 0)) != NULL) {
                     89:                        wd = options_get_string(&s->options, "default-path");
                     90:                        if (*wd == '\0')
                     91:                                wd = s->cwd;
                     92:                } else
                     93:                        wd = NULL;
                     94:                if (wd != NULL && *wd != '\0') {
                     95:                        newpath = get_full_path(wd, path);
                     96:                        if (newpath != NULL)
                     97:                                path = newpath;
                     98:                }
                     99:
1.7       nicm      100:                mask = umask(S_IRWXG | S_IRWXO);
1.10      nicm      101:                if (args_has(self->args, 'a'))
                    102:                        f = fopen(path, "ab");
1.7       nicm      103:                else
1.10      nicm      104:                        f = fopen(path, "wb");
1.7       nicm      105:                umask(mask);
                    106:                if (f == NULL) {
1.10      nicm      107:                        ctx->error(ctx, "%s: %s", path, strerror(errno));
1.7       nicm      108:                        return (-1);
                    109:                }
1.8       nicm      110:                if (fwrite(pb->data, 1, pb->size, f) != pb->size) {
1.10      nicm      111:                        ctx->error(ctx, "%s: fwrite error", path);
1.8       nicm      112:                        fclose(f);
                    113:                        return (-1);
                    114:                }
                    115:                fclose(f);
1.1       nicm      116:        }
                    117:
                    118:        return (0);
                    119: }