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Annotation of src/usr.bin/tmux/cmd-save-buffer.c, Revision 1.12

1.12    ! nicm        1: /* $OpenBSD: cmd-save-buffer.c,v 1.11 2011/10/23 00:49:25 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: /*
1.11      nicm       28:  * Saves a paste buffer to a file.
1.1       nicm       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;
1.12    ! nicm       48:        struct session          *s;
1.1       nicm       49:        struct paste_buffer     *pb;
1.12    ! nicm       50:        const char              *path, *newpath, *wd;
1.10      nicm       51:        char                    *cause;
                     52:        int                      buffer;
1.8       nicm       53:        mode_t                   mask;
                     54:        FILE                    *f;
1.1       nicm       55:
1.10      nicm       56:        if (!args_has(args, 'b')) {
1.9       nicm       57:                if ((pb = paste_get_top(&global_buffers)) == NULL) {
1.1       nicm       58:                        ctx->error(ctx, "no buffers");
                     59:                        return (-1);
                     60:                }
                     61:        } else {
1.10      nicm       62:                buffer = args_strtonum(args, 'b', 0, INT_MAX, &cause);
                     63:                if (cause != NULL) {
                     64:                        ctx->error(ctx, "buffer %s", cause);
                     65:                        xfree(cause);
                     66:                        return (-1);
                     67:                }
                     68:
                     69:                pb = paste_get_index(&global_buffers, buffer);
1.9       nicm       70:                if (pb == NULL) {
1.10      nicm       71:                        ctx->error(ctx, "no buffer %d", buffer);
1.1       nicm       72:                        return (-1);
                     73:                }
                     74:        }
                     75:
1.10      nicm       76:        path = args->argv[0];
                     77:        if (strcmp(path, "-") == 0) {
                     78:                if (c == NULL) {
                     79:                        ctx->error(ctx, "%s: can't write to stdout", path);
1.7       nicm       80:                        return (-1);
                     81:                }
1.10      nicm       82:                bufferevent_write(c->stdout_event, pb->data, pb->size);
1.7       nicm       83:        } else {
1.12    ! nicm       84:                if (c != NULL)
        !            85:                        wd = c->cwd;
        !            86:                else if ((s = cmd_current_session(ctx, 0)) != NULL) {
        !            87:                        wd = options_get_string(&s->options, "default-path");
        !            88:                        if (*wd == '\0')
        !            89:                                wd = s->cwd;
        !            90:                } else
        !            91:                        wd = NULL;
        !            92:                if (wd != NULL && *wd != '\0') {
        !            93:                        newpath = get_full_path(wd, path);
        !            94:                        if (newpath != NULL)
        !            95:                                path = newpath;
        !            96:                }
        !            97:
1.7       nicm       98:                mask = umask(S_IRWXG | S_IRWXO);
1.10      nicm       99:                if (args_has(self->args, 'a'))
                    100:                        f = fopen(path, "ab");
1.7       nicm      101:                else
1.10      nicm      102:                        f = fopen(path, "wb");
1.7       nicm      103:                umask(mask);
                    104:                if (f == NULL) {
1.10      nicm      105:                        ctx->error(ctx, "%s: %s", path, strerror(errno));
1.7       nicm      106:                        return (-1);
                    107:                }
1.8       nicm      108:                if (fwrite(pb->data, 1, pb->size, f) != pb->size) {
1.10      nicm      109:                        ctx->error(ctx, "%s: fwrite error", path);
1.8       nicm      110:                        fclose(f);
                    111:                        return (-1);
                    112:                }
                    113:                fclose(f);
1.1       nicm      114:        }
                    115:
                    116:        return (0);
                    117: }