1 /* $OpenBSD: cmd-capture-pane.c,v 1.47 2019/03/14 06:36:21 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2009 Jonathan Alvarado <radobobo@users.sourceforge.net> 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 <stdlib.h> 22 #include <string.h> 23 24 #include "tmux.h" 25 26 /* 27 * Write the entire contents of a pane to a buffer or stdout. 28 */ 29 30 static enum cmd_retval cmd_capture_pane_exec(struct cmd *, struct cmdq_item *); 31 32 static char *cmd_capture_pane_append(char *, size_t *, char *, size_t); 33 static char *cmd_capture_pane_pending(struct args *, struct window_pane *, 34 size_t *); 35 static char *cmd_capture_pane_history(struct args *, struct cmdq_item *, 36 struct window_pane *, size_t *); 37 38 const struct cmd_entry cmd_capture_pane_entry = { 39 .name = "capture-pane", 40 .alias = "capturep", 41 42 .args = { "ab:CeE:JpPqS:t:", 0, 0 }, 43 .usage = "[-aCeJpPq] " CMD_BUFFER_USAGE " [-E end-line] " 44 "[-S start-line] " CMD_TARGET_PANE_USAGE, 45 46 .target = { 't', CMD_FIND_PANE, 0 }, 47 48 .flags = CMD_AFTERHOOK, 49 .exec = cmd_capture_pane_exec 50 }; 51 52 const struct cmd_entry cmd_clear_history_entry = { 53 .name = "clear-history", 54 .alias = "clearhist", 55 56 .args = { "t:", 0, 0 }, 57 .usage = CMD_TARGET_PANE_USAGE, 58 59 .target = { 't', CMD_FIND_PANE, 0 }, 60 61 .flags = CMD_AFTERHOOK, 62 .exec = cmd_capture_pane_exec 63 }; 64 65 static char * 66 cmd_capture_pane_append(char *buf, size_t *len, char *line, size_t linelen) 67 { 68 buf = xrealloc(buf, *len + linelen + 1); 69 memcpy(buf + *len, line, linelen); 70 *len += linelen; 71 return (buf); 72 } 73 74 static char * 75 cmd_capture_pane_pending(struct args *args, struct window_pane *wp, 76 size_t *len) 77 { 78 struct evbuffer *pending; 79 char *buf, *line, tmp[5]; 80 size_t linelen; 81 u_int i; 82 83 pending = input_pending(wp); 84 if (pending == NULL) 85 return (xstrdup("")); 86 87 line = EVBUFFER_DATA(pending); 88 linelen = EVBUFFER_LENGTH(pending); 89 90 buf = xstrdup(""); 91 if (args_has(args, 'C')) { 92 for (i = 0; i < linelen; i++) { 93 if (line[i] >= ' ' && line[i] != '\\') { 94 tmp[0] = line[i]; 95 tmp[1] = '\0'; 96 } else 97 xsnprintf(tmp, sizeof tmp, "\\%03hho", line[i]); 98 buf = cmd_capture_pane_append(buf, len, tmp, 99 strlen(tmp)); 100 } 101 } else 102 buf = cmd_capture_pane_append(buf, len, line, linelen); 103 return (buf); 104 } 105 106 static char * 107 cmd_capture_pane_history(struct args *args, struct cmdq_item *item, 108 struct window_pane *wp, size_t *len) 109 { 110 struct grid *gd; 111 const struct grid_line *gl; 112 struct grid_cell *gc = NULL; 113 int n, with_codes, escape_c0, join_lines; 114 u_int i, sx, top, bottom, tmp; 115 char *cause, *buf, *line; 116 const char *Sflag, *Eflag; 117 size_t linelen; 118 119 sx = screen_size_x(&wp->base); 120 if (args_has(args, 'a')) { 121 gd = wp->saved_grid; 122 if (gd == NULL) { 123 if (!args_has(args, 'q')) { 124 cmdq_error(item, "no alternate screen"); 125 return (NULL); 126 } 127 return (xstrdup("")); 128 } 129 } else 130 gd = wp->base.grid; 131 132 Sflag = args_get(args, 'S'); 133 if (Sflag != NULL && strcmp(Sflag, "-") == 0) 134 top = 0; 135 else { 136 n = args_strtonum(args, 'S', INT_MIN, SHRT_MAX, &cause); 137 if (cause != NULL) { 138 top = gd->hsize; 139 free(cause); 140 } else if (n < 0 && (u_int) -n > gd->hsize) 141 top = 0; 142 else 143 top = gd->hsize + n; 144 if (top > gd->hsize + gd->sy - 1) 145 top = gd->hsize + gd->sy - 1; 146 } 147 148 Eflag = args_get(args, 'E'); 149 if (Eflag != NULL && strcmp(Eflag, "-") == 0) 150 bottom = gd->hsize + gd->sy - 1; 151 else { 152 n = args_strtonum(args, 'E', INT_MIN, SHRT_MAX, &cause); 153 if (cause != NULL) { 154 bottom = gd->hsize + gd->sy - 1; 155 free(cause); 156 } else if (n < 0 && (u_int) -n > gd->hsize) 157 bottom = 0; 158 else 159 bottom = gd->hsize + n; 160 if (bottom > gd->hsize + gd->sy - 1) 161 bottom = gd->hsize + gd->sy - 1; 162 } 163 164 if (bottom < top) { 165 tmp = bottom; 166 bottom = top; 167 top = tmp; 168 } 169 170 with_codes = args_has(args, 'e'); 171 escape_c0 = args_has(args, 'C'); 172 join_lines = args_has(args, 'J'); 173 174 buf = NULL; 175 for (i = top; i <= bottom; i++) { 176 line = grid_string_cells(gd, 0, i, sx, &gc, with_codes, 177 escape_c0, !join_lines); 178 linelen = strlen(line); 179 180 buf = cmd_capture_pane_append(buf, len, line, linelen); 181 182 gl = grid_peek_line(gd, i); 183 if (!join_lines || !(gl->flags & GRID_LINE_WRAPPED)) 184 buf[(*len)++] = '\n'; 185 186 free(line); 187 } 188 return (buf); 189 } 190 191 static enum cmd_retval 192 cmd_capture_pane_exec(struct cmd *self, struct cmdq_item *item) 193 { 194 struct args *args = self->args; 195 struct client *c; 196 struct window_pane *wp = item->target.wp; 197 char *buf, *cause; 198 const char *bufname; 199 size_t len; 200 201 if (self->entry == &cmd_clear_history_entry) { 202 window_pane_reset_mode_all(wp); 203 grid_clear_history(wp->base.grid); 204 return (CMD_RETURN_NORMAL); 205 } 206 207 len = 0; 208 if (args_has(args, 'P')) 209 buf = cmd_capture_pane_pending(args, wp, &len); 210 else 211 buf = cmd_capture_pane_history(args, item, wp, &len); 212 if (buf == NULL) 213 return (CMD_RETURN_ERROR); 214 215 if (args_has(args, 'p')) { 216 c = item->client; 217 if (c == NULL || 218 (c->session != NULL && !(c->flags & CLIENT_CONTROL))) { 219 cmdq_error(item, "can't write to stdout"); 220 free(buf); 221 return (CMD_RETURN_ERROR); 222 } 223 evbuffer_add(c->stdout_data, buf, len); 224 free(buf); 225 if (args_has(args, 'P') && len > 0) 226 evbuffer_add(c->stdout_data, "\n", 1); 227 server_client_push_stdout(c); 228 } else { 229 bufname = NULL; 230 if (args_has(args, 'b')) 231 bufname = args_get(args, 'b'); 232 233 if (paste_set(buf, len, bufname, &cause) != 0) { 234 cmdq_error(item, "%s", cause); 235 free(cause); 236 free(buf); 237 return (CMD_RETURN_ERROR); 238 } 239 } 240 241 return (CMD_RETURN_NORMAL); 242 } 243