1 /* $OpenBSD: cmd-load-buffer.c,v 1.40 2015/12/13 14:32:38 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 enum cmd_retval cmd_load_buffer_exec(struct cmd *, struct cmd_q *); 35 void cmd_load_buffer_callback(struct client *, int, void *); 36 37 const struct cmd_entry cmd_load_buffer_entry = { 38 "load-buffer", "loadb", 39 "b:", 1, 1, 40 CMD_BUFFER_USAGE " path", 41 0, 42 cmd_load_buffer_exec 43 }; 44 45 enum cmd_retval 46 cmd_load_buffer_exec(struct cmd *self, struct cmd_q *cmdq) 47 { 48 struct args *args = self->args; 49 struct client *c = cmdq->client; 50 struct session *s; 51 FILE *f; 52 const char *path, *bufname, *cwd; 53 char *pdata, *new_pdata, *cause, *file, resolved[PATH_MAX]; 54 size_t psize; 55 int ch, error; 56 57 bufname = NULL; 58 if (args_has(args, 'b')) 59 bufname = args_get(args, 'b'); 60 61 path = args->argv[0]; 62 if (strcmp(path, "-") == 0) { 63 error = server_set_stdin_callback(c, cmd_load_buffer_callback, 64 (void *)bufname, &cause); 65 if (error != 0) { 66 cmdq_error(cmdq, "%s: %s", path, cause); 67 free(cause); 68 return (CMD_RETURN_ERROR); 69 } 70 return (CMD_RETURN_WAIT); 71 } 72 73 if (c != NULL && c->session == NULL) 74 cwd = c->cwd; 75 else if ((s = c->session) != NULL) 76 cwd = s->cwd; 77 else 78 cwd = "."; 79 80 if (*path == '/') 81 file = xstrdup(path); 82 else 83 xasprintf(&file, "%s/%s", cwd, path); 84 if (realpath(file, resolved) == NULL && 85 strlcpy(resolved, file, sizeof resolved) >= sizeof resolved) { 86 cmdq_error(cmdq, "%s: %s", file, strerror(ENAMETOOLONG)); 87 return (CMD_RETURN_ERROR); 88 } 89 f = fopen(resolved, "rb"); 90 free(file); 91 if (f == NULL) { 92 cmdq_error(cmdq, "%s: %s", resolved, strerror(errno)); 93 return (CMD_RETURN_ERROR); 94 } 95 96 pdata = NULL; 97 psize = 0; 98 while ((ch = getc(f)) != EOF) { 99 /* Do not let the server die due to memory exhaustion. */ 100 if ((new_pdata = realloc(pdata, psize + 2)) == NULL) { 101 cmdq_error(cmdq, "realloc error: %s", strerror(errno)); 102 goto error; 103 } 104 pdata = new_pdata; 105 pdata[psize++] = ch; 106 } 107 if (ferror(f)) { 108 cmdq_error(cmdq, "%s: read error", resolved); 109 goto error; 110 } 111 if (pdata != NULL) 112 pdata[psize] = '\0'; 113 114 fclose(f); 115 116 if (paste_set(pdata, psize, bufname, &cause) != 0) { 117 cmdq_error(cmdq, "%s", cause); 118 free(pdata); 119 free(cause); 120 return (CMD_RETURN_ERROR); 121 } 122 123 return (CMD_RETURN_NORMAL); 124 125 error: 126 free(pdata); 127 if (f != NULL) 128 fclose(f); 129 return (CMD_RETURN_ERROR); 130 } 131 132 void 133 cmd_load_buffer_callback(struct client *c, int closed, void *data) 134 { 135 const char *bufname = data; 136 char *pdata, *cause, *saved; 137 size_t psize; 138 139 if (!closed) 140 return; 141 c->stdin_callback = NULL; 142 143 server_client_unref(c); 144 if (c->flags & CLIENT_DEAD) 145 return; 146 147 psize = EVBUFFER_LENGTH(c->stdin_data); 148 if (psize == 0 || (pdata = malloc(psize + 1)) == NULL) 149 goto out; 150 151 memcpy(pdata, EVBUFFER_DATA(c->stdin_data), psize); 152 pdata[psize] = '\0'; 153 evbuffer_drain(c->stdin_data, psize); 154 155 if (paste_set(pdata, psize, bufname, &cause) != 0) { 156 /* No context so can't use server_client_msg_error. */ 157 if (~c->flags & CLIENT_UTF8) { 158 saved = cause; 159 cause = utf8_sanitize(saved); 160 free(saved); 161 } 162 evbuffer_add_printf(c->stderr_data, "%s", cause); 163 server_client_push_stderr(c); 164 free(pdata); 165 free(cause); 166 } 167 168 out: 169 cmdq_continue(c->cmdq); 170 } 171