1 /* $OpenBSD: cmd-load-buffer.c,v 1.23 2013/03/24 09:54:10 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 21 #include <errno.h> 22 #include <stdio.h> 23 #include <stdlib.h> 24 #include <string.h> 25 #include <unistd.h> 26 27 #include "tmux.h" 28 29 /* 30 * Loads a paste buffer from a file. 31 */ 32 33 enum cmd_retval cmd_load_buffer_exec(struct cmd *, struct cmd_q *); 34 void cmd_load_buffer_callback(struct client *, int, void *); 35 36 const struct cmd_entry cmd_load_buffer_entry = { 37 "load-buffer", "loadb", 38 "b:", 1, 1, 39 CMD_BUFFER_USAGE " path", 40 0, 41 NULL, 42 NULL, 43 cmd_load_buffer_exec 44 }; 45 46 enum cmd_retval 47 cmd_load_buffer_exec(struct cmd *self, struct cmd_q *cmdq) 48 { 49 struct args *args = self->args; 50 struct client *c = cmdq->client; 51 struct session *s; 52 FILE *f; 53 const char *path, *newpath, *wd; 54 char *pdata, *new_pdata, *cause; 55 size_t psize; 56 u_int limit; 57 int ch, error, buffer, *buffer_ptr; 58 59 if (!args_has(args, 'b')) 60 buffer = -1; 61 else { 62 buffer = args_strtonum(args, 'b', 0, INT_MAX, &cause); 63 if (cause != NULL) { 64 cmdq_error(cmdq, "buffer %s", cause); 65 free(cause); 66 return (CMD_RETURN_ERROR); 67 } 68 } 69 70 path = args->argv[0]; 71 if (strcmp(path, "-") == 0) { 72 buffer_ptr = xmalloc(sizeof *buffer_ptr); 73 *buffer_ptr = buffer; 74 75 error = server_set_stdin_callback (c, cmd_load_buffer_callback, 76 buffer_ptr, &cause); 77 if (error != 0) { 78 cmdq_error(cmdq, "%s: %s", path, cause); 79 free(cause); 80 return (CMD_RETURN_ERROR); 81 } 82 return (CMD_RETURN_WAIT); 83 } 84 85 if (c != NULL) 86 wd = c->cwd; 87 else if ((s = cmd_current_session(cmdq, 0)) != NULL) { 88 wd = options_get_string(&s->options, "default-path"); 89 if (*wd == '\0') 90 wd = s->cwd; 91 } else 92 wd = NULL; 93 if (wd != NULL && *wd != '\0') { 94 newpath = get_full_path(wd, path); 95 if (newpath != NULL) 96 path = newpath; 97 } 98 if ((f = fopen(path, "rb")) == NULL) { 99 cmdq_error(cmdq, "%s: %s", path, strerror(errno)); 100 return (CMD_RETURN_ERROR); 101 } 102 103 pdata = NULL; 104 psize = 0; 105 while ((ch = getc(f)) != EOF) { 106 /* Do not let the server die due to memory exhaustion. */ 107 if ((new_pdata = realloc(pdata, psize + 2)) == NULL) { 108 cmdq_error(cmdq, "realloc error: %s", strerror(errno)); 109 goto error; 110 } 111 pdata = new_pdata; 112 pdata[psize++] = ch; 113 } 114 if (ferror(f)) { 115 cmdq_error(cmdq, "%s: read error", path); 116 goto error; 117 } 118 if (pdata != NULL) 119 pdata[psize] = '\0'; 120 121 fclose(f); 122 123 limit = options_get_number(&global_options, "buffer-limit"); 124 if (buffer == -1) { 125 paste_add(&global_buffers, pdata, psize, limit); 126 return (CMD_RETURN_NORMAL); 127 } 128 if (paste_replace(&global_buffers, buffer, pdata, psize) != 0) { 129 cmdq_error(cmdq, "no buffer %d", buffer); 130 free(pdata); 131 return (CMD_RETURN_ERROR); 132 } 133 134 return (CMD_RETURN_NORMAL); 135 136 error: 137 free(pdata); 138 if (f != NULL) 139 fclose(f); 140 return (CMD_RETURN_ERROR); 141 } 142 143 void 144 cmd_load_buffer_callback(struct client *c, int closed, void *data) 145 { 146 int *buffer = data; 147 char *pdata; 148 size_t psize; 149 u_int limit; 150 151 if (!closed) 152 return; 153 c->stdin_callback = NULL; 154 155 c->references--; 156 if (c->flags & CLIENT_DEAD) 157 return; 158 159 psize = EVBUFFER_LENGTH(c->stdin_data); 160 if (psize == 0 || (pdata = malloc(psize + 1)) == NULL) { 161 free(data); 162 goto out; 163 } 164 memcpy(pdata, EVBUFFER_DATA(c->stdin_data), psize); 165 pdata[psize] = '\0'; 166 evbuffer_drain(c->stdin_data, psize); 167 168 limit = options_get_number(&global_options, "buffer-limit"); 169 if (*buffer == -1) 170 paste_add(&global_buffers, pdata, psize, limit); 171 else if (paste_replace(&global_buffers, *buffer, pdata, psize) != 0) { 172 /* No context so can't use server_client_msg_error. */ 173 evbuffer_add_printf(c->stderr_data, "no buffer %d\n", *buffer); 174 server_push_stderr(c); 175 } 176 177 free(data); 178 179 out: 180 cmdq_continue(c->cmdq); 181 } 182