1 /* $OpenBSD: cmd-load-buffer.c,v 1.45 2016/10/16 17:55:14 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 <fcntl.h> 23 #include <stdio.h> 24 #include <stdlib.h> 25 #include <string.h> 26 #include <unistd.h> 27 28 #include "tmux.h" 29 30 /* 31 * Loads a paste buffer from a file. 32 */ 33 34 static enum cmd_retval cmd_load_buffer_exec(struct cmd *, struct cmd_q *); 35 36 static void cmd_load_buffer_callback(struct client *, int, void *); 37 38 const struct cmd_entry cmd_load_buffer_entry = { 39 .name = "load-buffer", 40 .alias = "loadb", 41 42 .args = { "b:", 1, 1 }, 43 .usage = CMD_BUFFER_USAGE " path", 44 45 .flags = CMD_AFTERHOOK, 46 .exec = cmd_load_buffer_exec 47 }; 48 49 struct cmd_load_buffer_data { 50 struct cmd_q *cmdq; 51 char *bufname; 52 }; 53 54 static enum cmd_retval 55 cmd_load_buffer_exec(struct cmd *self, struct cmd_q *cmdq) 56 { 57 struct args *args = self->args; 58 struct cmd_load_buffer_data *cdata; 59 struct client *c = cmdq->client; 60 struct session *s; 61 FILE *f; 62 const char *path, *bufname, *cwd; 63 char *pdata, *new_pdata, *cause, *file; 64 char resolved[PATH_MAX]; 65 size_t psize; 66 int ch, error; 67 68 bufname = NULL; 69 if (args_has(args, 'b')) 70 bufname = args_get(args, 'b'); 71 72 path = args->argv[0]; 73 if (strcmp(path, "-") == 0) { 74 cdata = xcalloc(1, sizeof *cdata); 75 cdata->cmdq = cmdq; 76 cdata->bufname = xstrdup(bufname); 77 78 error = server_set_stdin_callback(c, cmd_load_buffer_callback, 79 cdata, &cause); 80 if (error != 0) { 81 cmdq_error(cmdq, "%s: %s", path, cause); 82 free(cause); 83 return (CMD_RETURN_ERROR); 84 } 85 return (CMD_RETURN_WAIT); 86 } 87 88 if (c != NULL && c->session == NULL && c->cwd != NULL) 89 cwd = c->cwd; 90 else if ((s = c->session) != NULL && s->cwd != NULL) 91 cwd = s->cwd; 92 else 93 cwd = "."; 94 95 if (*path == '/') 96 file = xstrdup(path); 97 else 98 xasprintf(&file, "%s/%s", cwd, path); 99 if (realpath(file, resolved) == NULL && 100 strlcpy(resolved, file, sizeof resolved) >= sizeof resolved) { 101 cmdq_error(cmdq, "%s: %s", file, strerror(ENAMETOOLONG)); 102 return (CMD_RETURN_ERROR); 103 } 104 f = fopen(resolved, "rb"); 105 free(file); 106 if (f == NULL) { 107 cmdq_error(cmdq, "%s: %s", resolved, strerror(errno)); 108 return (CMD_RETURN_ERROR); 109 } 110 111 pdata = NULL; 112 psize = 0; 113 while ((ch = getc(f)) != EOF) { 114 /* Do not let the server die due to memory exhaustion. */ 115 if ((new_pdata = realloc(pdata, psize + 2)) == NULL) { 116 cmdq_error(cmdq, "realloc error: %s", strerror(errno)); 117 goto error; 118 } 119 pdata = new_pdata; 120 pdata[psize++] = ch; 121 } 122 if (ferror(f)) { 123 cmdq_error(cmdq, "%s: read error", resolved); 124 goto error; 125 } 126 if (pdata != NULL) 127 pdata[psize] = '\0'; 128 129 fclose(f); 130 131 if (paste_set(pdata, psize, bufname, &cause) != 0) { 132 cmdq_error(cmdq, "%s", cause); 133 free(pdata); 134 free(cause); 135 return (CMD_RETURN_ERROR); 136 } 137 138 return (CMD_RETURN_NORMAL); 139 140 error: 141 free(pdata); 142 if (f != NULL) 143 fclose(f); 144 return (CMD_RETURN_ERROR); 145 } 146 147 static void 148 cmd_load_buffer_callback(struct client *c, int closed, void *data) 149 { 150 struct cmd_load_buffer_data *cdata = data; 151 char *pdata, *cause, *saved; 152 size_t psize; 153 154 if (!closed) 155 return; 156 c->stdin_callback = NULL; 157 158 server_client_unref(c); 159 if (c->flags & CLIENT_DEAD) 160 goto out; 161 162 psize = EVBUFFER_LENGTH(c->stdin_data); 163 if (psize == 0 || (pdata = malloc(psize + 1)) == NULL) 164 goto out; 165 166 memcpy(pdata, EVBUFFER_DATA(c->stdin_data), psize); 167 pdata[psize] = '\0'; 168 evbuffer_drain(c->stdin_data, psize); 169 170 if (paste_set(pdata, psize, cdata->bufname, &cause) != 0) { 171 /* No context so can't use server_client_msg_error. */ 172 if (~c->flags & CLIENT_UTF8) { 173 saved = cause; 174 cause = utf8_sanitize(saved); 175 free(saved); 176 } 177 evbuffer_add_printf(c->stderr_data, "%s", cause); 178 server_client_push_stderr(c); 179 free(pdata); 180 free(cause); 181 } 182 out: 183 cdata->cmdq->flags &= ~CMD_Q_WAITING; 184 185 free(cdata->bufname); 186 free(cdata); 187 } 188