1 /* $OpenBSD: cmd-save-buffer.c,v 1.20 2013/10/10 12:00:22 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 <vis.h> 26 27 #include "tmux.h" 28 29 /* 30 * Saves a paste buffer to a file. 31 */ 32 33 enum cmd_retval cmd_save_buffer_exec(struct cmd *, struct cmd_q *); 34 35 const struct cmd_entry cmd_save_buffer_entry = { 36 "save-buffer", "saveb", 37 "ab:", 1, 1, 38 "[-a] " CMD_BUFFER_USAGE " path", 39 0, 40 NULL, 41 cmd_save_buffer_exec 42 }; 43 44 const struct cmd_entry cmd_show_buffer_entry = { 45 "show-buffer", "showb", 46 "b:", 0, 0, 47 CMD_BUFFER_USAGE, 48 0, 49 NULL, 50 cmd_save_buffer_exec 51 }; 52 53 enum cmd_retval 54 cmd_save_buffer_exec(struct cmd *self, struct cmd_q *cmdq) 55 { 56 struct args *args = self->args; 57 struct client *c; 58 struct session *s; 59 struct paste_buffer *pb; 60 const char *path, *newpath, *wd; 61 char *cause, *start, *end; 62 size_t size, used; 63 int buffer; 64 mode_t mask; 65 FILE *f; 66 char *msg; 67 size_t msglen; 68 69 if (!args_has(args, 'b')) { 70 if ((pb = paste_get_top(&global_buffers)) == NULL) { 71 cmdq_error(cmdq, "no buffers"); 72 return (CMD_RETURN_ERROR); 73 } 74 } else { 75 buffer = args_strtonum(args, 'b', 0, INT_MAX, &cause); 76 if (cause != NULL) { 77 cmdq_error(cmdq, "buffer %s", cause); 78 free(cause); 79 return (CMD_RETURN_ERROR); 80 } 81 82 pb = paste_get_index(&global_buffers, buffer); 83 if (pb == NULL) { 84 cmdq_error(cmdq, "no buffer %d", buffer); 85 return (CMD_RETURN_ERROR); 86 } 87 } 88 89 if (self->entry == &cmd_show_buffer_entry) 90 path = "-"; 91 else 92 path = args->argv[0]; 93 if (strcmp(path, "-") == 0) { 94 c = cmdq->client; 95 if (c == NULL) { 96 cmdq_error(cmdq, "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 c = cmdq->client; 105 if (c != NULL) 106 wd = c->cwd; 107 else if ((s = cmd_current_session(cmdq, 0)) != NULL) { 108 wd = options_get_string(&s->options, "default-path"); 109 if (*wd == '\0') 110 wd = s->cwd; 111 } else 112 wd = NULL; 113 if (wd != NULL && *wd != '\0') { 114 newpath = get_full_path(wd, path); 115 if (newpath != NULL) 116 path = newpath; 117 } 118 119 mask = umask(S_IRWXG | S_IRWXO); 120 if (args_has(self->args, 'a')) 121 f = fopen(path, "ab"); 122 else 123 f = fopen(path, "wb"); 124 umask(mask); 125 if (f == NULL) { 126 cmdq_error(cmdq, "%s: %s", path, strerror(errno)); 127 return (CMD_RETURN_ERROR); 128 } 129 if (fwrite(pb->data, 1, pb->size, f) != pb->size) { 130 cmdq_error(cmdq, "%s: fwrite error", path); 131 fclose(f); 132 return (CMD_RETURN_ERROR); 133 } 134 fclose(f); 135 136 return (CMD_RETURN_NORMAL); 137 138 do_stdout: 139 evbuffer_add(c->stdout_data, pb->data, pb->size); 140 server_push_stdout(c); 141 return (CMD_RETURN_NORMAL); 142 143 do_print: 144 if (pb->size > (INT_MAX / 4) - 1) { 145 cmdq_error(cmdq, "buffer too big"); 146 return (CMD_RETURN_ERROR); 147 } 148 msg = NULL; 149 msglen = 0; 150 151 used = 0; 152 while (used != pb->size) { 153 start = pb->data + used; 154 end = memchr(start, '\n', pb->size - used); 155 if (end != NULL) 156 size = end - start; 157 else 158 size = pb->size - used; 159 160 msglen = size * 4 + 1; 161 msg = xrealloc(msg, 1, msglen); 162 163 strvisx(msg, start, size, VIS_OCTAL|VIS_TAB); 164 cmdq_print(cmdq, "%s", msg); 165 166 used += size + (end != NULL); 167 } 168 169 free(msg); 170 return (CMD_RETURN_NORMAL); 171 } 172