1 /* $OpenBSD: cmd-load-buffer.c,v 1.10 2009/11/26 22:32:00 nicm Exp $ */ 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", 38 CMD_ARG1, "", 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; 51 struct stat sb; 52 FILE *f; 53 char *pdata = NULL; 54 size_t psize; 55 u_int limit; 56 57 if ((s = cmd_find_session(ctx, data->target)) == NULL) 58 return (-1); 59 60 if ((f = fopen(data->arg, "rb")) == NULL) { 61 ctx->error(ctx, "%s: %s", data->arg, strerror(errno)); 62 return (-1); 63 } 64 65 if (fstat(fileno(f), &sb) < 0) { 66 ctx->error(ctx, "%s: %s", data->arg, strerror(errno)); 67 goto error; 68 } 69 if (sb.st_size <= 0 || (uintmax_t) sb.st_size > SIZE_MAX) { 70 ctx->error(ctx, "%s: file empty or too large", data->arg); 71 goto error; 72 } 73 psize = (size_t) sb.st_size; 74 75 /* 76 * We don't want to die due to memory exhaustion, hence xmalloc can't 77 * be used here. 78 */ 79 if ((pdata = malloc(psize)) == NULL) { 80 ctx->error(ctx, "malloc error: %s", strerror(errno)); 81 goto error; 82 } 83 84 if (fread(pdata, 1, psize, f) != psize) { 85 ctx->error(ctx, "%s: fread error", data->arg); 86 goto error; 87 } 88 89 fclose(f); 90 91 limit = options_get_number(&s->options, "buffer-limit"); 92 if (data->buffer == -1) { 93 paste_add(&s->buffers, pdata, psize, limit); 94 return (0); 95 } 96 if (paste_replace(&s->buffers, data->buffer, pdata, psize) != 0) { 97 ctx->error(ctx, "no buffer %d", data->buffer); 98 goto error; 99 } 100 101 return (0); 102 103 error: 104 if (pdata != NULL) 105 xfree(pdata); 106 fclose(f); 107 return (-1); 108 } 109