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Annotation of src/usr.bin/tmux/cmd-load-buffer.c, Revision 1.9

1.9     ! nicm        1: /* $OpenBSD: cmd-load-buffer.c,v 1.8 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 <stdlib.h>
                     24: #include <string.h>
                     25: #include <unistd.h>
                     26:
                     27: #include "tmux.h"
                     28:
                     29: /*
                     30:  * Loads a session paste buffer from a file.
                     31:  */
                     32:
                     33: int    cmd_load_buffer_exec(struct cmd *, struct cmd_ctx *);
                     34:
                     35: const struct cmd_entry cmd_load_buffer_entry = {
                     36:        "load-buffer", "loadb",
                     37:        CMD_BUFFER_SESSION_USAGE " path",
1.8       nicm       38:        CMD_ARG1, "",
1.1       nicm       39:        cmd_buffer_init,
                     40:        cmd_buffer_parse,
                     41:        cmd_load_buffer_exec,
                     42:        cmd_buffer_free,
                     43:        cmd_buffer_print
                     44: };
                     45:
                     46: int
                     47: cmd_load_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
                     48: {
                     49:        struct cmd_buffer_data  *data = self->data;
                     50:        struct session          *s;
1.6       nicm       51:        struct stat              sb;
1.1       nicm       52:        FILE                    *f;
1.9     ! nicm       53:        char                    *pdata = NULL;
        !            54:        size_t                   psize;
1.6       nicm       55:        u_int                    limit;
1.1       nicm       56:
                     57:        if ((s = cmd_find_session(ctx, data->target)) == NULL)
                     58:                return (-1);
                     59:
1.7       nicm       60:        if ((f = fopen(data->arg, "rb")) == NULL) {
1.1       nicm       61:                ctx->error(ctx, "%s: %s", data->arg, strerror(errno));
                     62:                return (-1);
                     63:        }
                     64:
1.7       nicm       65:        if (fstat(fileno(f), &sb) < 0) {
1.1       nicm       66:                ctx->error(ctx, "%s: %s", data->arg, strerror(errno));
1.9     ! nicm       67:                goto error;
        !            68:        }
        !            69:        if (sb.st_size > SIZE_MAX) {
        !            70:                ctx->error(ctx, "%s: file too large", data->arg);
        !            71:                goto error;
1.1       nicm       72:        }
1.9     ! nicm       73:        psize = (size_t) sb.st_size;
1.1       nicm       74:
                     75:        /*
                     76:         * We don't want to die due to memory exhaustion, hence xmalloc can't
                     77:         * be used here.
                     78:         */
1.9     ! nicm       79:        if ((pdata = malloc(psize)) == NULL) {
1.1       nicm       80:                ctx->error(ctx, "malloc error: %s", strerror(errno));
1.9     ! nicm       81:                goto error;
1.1       nicm       82:        }
                     83:
1.9     ! nicm       84:        if (fread(pdata, 1, psize, f) != psize) {
1.1       nicm       85:                ctx->error(ctx, "%s: fread error", data->arg);
1.9     ! nicm       86:                goto error;
1.1       nicm       87:        }
                     88:
                     89:        fclose(f);
                     90:
                     91:        limit = options_get_number(&s->options, "buffer-limit");
                     92:        if (data->buffer == -1) {
1.9     ! nicm       93:                paste_add(&s->buffers, pdata, psize, limit);
1.1       nicm       94:                return (0);
                     95:        }
1.9     ! nicm       96:        if (paste_replace(&s->buffers, data->buffer, pdata, psize) != 0) {
1.1       nicm       97:                ctx->error(ctx, "no buffer %d", data->buffer);
1.9     ! nicm       98:                goto error;
1.1       nicm       99:        }
                    100:
                    101:        return (0);
1.9     ! nicm      102:
        !           103: error:
        !           104:        if (pdata != NULL)
        !           105:                xfree(pdata);
        !           106:        fclose(f);
        !           107:        return (-1);
1.1       nicm      108: }