1 /* $OpenBSD: cmd-save-buffer.c,v 1.45 2018/07/31 13:06:44 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 <fcntl.h> 24 #include <stdlib.h> 25 #include <string.h> 26 #include <unistd.h> 27 #include <vis.h> 28 29 #include "tmux.h" 30 31 /* 32 * Saves a paste buffer to a file. 33 */ 34 35 static enum cmd_retval cmd_save_buffer_exec(struct cmd *, struct cmdq_item *); 36 37 const struct cmd_entry cmd_save_buffer_entry = { 38 .name = "save-buffer", 39 .alias = "saveb", 40 41 .args = { "ab:", 1, 1 }, 42 .usage = "[-a] " CMD_BUFFER_USAGE " path", 43 44 .flags = CMD_AFTERHOOK, 45 .exec = cmd_save_buffer_exec 46 }; 47 48 const struct cmd_entry cmd_show_buffer_entry = { 49 .name = "show-buffer", 50 .alias = "showb", 51 52 .args = { "b:", 0, 0 }, 53 .usage = CMD_BUFFER_USAGE, 54 55 .flags = CMD_AFTERHOOK, 56 .exec = cmd_save_buffer_exec 57 }; 58 59 static enum cmd_retval 60 cmd_save_buffer_exec(struct cmd *self, struct cmdq_item *item) 61 { 62 struct args *args = self->args; 63 struct client *c = cmd_find_client(item, NULL, 1); 64 struct session *s = item->target.s; 65 struct winlink *wl = item->target.wl; 66 struct window_pane *wp = item->target.wp; 67 struct paste_buffer *pb; 68 const char *bufname, *bufdata, *start, *end, *flags; 69 char *msg, *path, *file; 70 size_t size, used, msglen, bufsize; 71 FILE *f; 72 73 if (!args_has(args, 'b')) { 74 if ((pb = paste_get_top(NULL)) == NULL) { 75 cmdq_error(item, "no buffers"); 76 return (CMD_RETURN_ERROR); 77 } 78 } else { 79 bufname = args_get(args, 'b'); 80 pb = paste_get_name(bufname); 81 if (pb == NULL) { 82 cmdq_error(item, "no buffer %s", bufname); 83 return (CMD_RETURN_ERROR); 84 } 85 } 86 bufdata = paste_buffer_data(pb, &bufsize); 87 88 if (self->entry == &cmd_show_buffer_entry) 89 path = xstrdup("-"); 90 else 91 path = format_single(item, args->argv[0], c, s, wl, wp); 92 if (strcmp(path, "-") == 0) { 93 free(path); 94 c = item->client; 95 if (c == NULL) { 96 cmdq_error(item, "can't write to stdout"); 97 return (CMD_RETURN_ERROR); 98 } 99 if (c->session == NULL || (c->flags & CLIENT_CONTROL)) 100 goto do_stdout; 101 goto do_print; 102 } 103 104 flags = "wb"; 105 if (args_has(self->args, 'a')) 106 flags = "ab"; 107 108 file = server_client_get_path(c, path); 109 free(path); 110 111 f = fopen(file, flags); 112 if (f == NULL) { 113 cmdq_error(item, "%s: %s", file, strerror(errno)); 114 free(file); 115 return (CMD_RETURN_ERROR); 116 } 117 118 if (fwrite(bufdata, 1, bufsize, f) != bufsize) { 119 cmdq_error(item, "%s: write error", file); 120 fclose(f); 121 free(file); 122 return (CMD_RETURN_ERROR); 123 } 124 125 fclose(f); 126 free(file); 127 128 return (CMD_RETURN_NORMAL); 129 130 do_stdout: 131 evbuffer_add(c->stdout_data, bufdata, bufsize); 132 server_client_push_stdout(c); 133 return (CMD_RETURN_NORMAL); 134 135 do_print: 136 if (bufsize > (INT_MAX / 4) - 1) { 137 cmdq_error(item, "buffer too big"); 138 return (CMD_RETURN_ERROR); 139 } 140 msg = NULL; 141 142 used = 0; 143 while (used != bufsize) { 144 start = bufdata + used; 145 end = memchr(start, '\n', bufsize - used); 146 if (end != NULL) 147 size = end - start; 148 else 149 size = bufsize - used; 150 151 msglen = size * 4 + 1; 152 msg = xrealloc(msg, msglen); 153 154 strvisx(msg, start, size, VIS_OCTAL|VIS_TAB); 155 cmdq_print(item, "%s", msg); 156 157 used += size + (end != NULL); 158 } 159 160 free(msg); 161 return (CMD_RETURN_NORMAL); 162 } 163