1 /* $OpenBSD: cmd-capture-pane.c,v 1.42 2017/01/02 22:42:19 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 .tflag = CMD_PANE, 47 48 .flags = CMD_AFTERHOOK, 49 .exec = cmd_capture_pane_exec 50 }; 51 52 static char * 53 cmd_capture_pane_append(char *buf, size_t *len, char *line, size_t linelen) 54 { 55 buf = xrealloc(buf, *len + linelen + 1); 56 memcpy(buf + *len, line, linelen); 57 *len += linelen; 58 return (buf); 59 } 60 61 static char * 62 cmd_capture_pane_pending(struct args *args, struct window_pane *wp, 63 size_t *len) 64 { 65 struct evbuffer *pending; 66 char *buf, *line, tmp[5]; 67 size_t linelen; 68 u_int i; 69 70 pending = input_pending(wp); 71 if (pending == NULL) 72 return (xstrdup("")); 73 74 line = EVBUFFER_DATA(pending); 75 linelen = EVBUFFER_LENGTH(pending); 76 77 buf = xstrdup(""); 78 if (args_has(args, 'C')) { 79 for (i = 0; i < linelen; i++) { 80 if (line[i] >= ' ' && line[i] != '\\') { 81 tmp[0] = line[i]; 82 tmp[1] = '\0'; 83 } else 84 xsnprintf(tmp, sizeof tmp, "\\%03hho", line[i]); 85 buf = cmd_capture_pane_append(buf, len, tmp, 86 strlen(tmp)); 87 } 88 } else 89 buf = cmd_capture_pane_append(buf, len, line, linelen); 90 return (buf); 91 } 92 93 static char * 94 95 cmd_capture_pane_history(struct args *args, struct cmdq_item *item, 96 struct window_pane *wp, size_t *len) 97 { 98 struct grid *gd; 99 const struct grid_line *gl; 100 struct grid_cell *gc = NULL; 101 int n, with_codes, escape_c0, join_lines; 102 u_int i, sx, top, bottom, tmp; 103 char *cause, *buf, *line; 104 const char *Sflag, *Eflag; 105 size_t linelen; 106 107 sx = screen_size_x(&wp->base); 108 if (args_has(args, 'a')) { 109 gd = wp->saved_grid; 110 if (gd == NULL) { 111 if (!args_has(args, 'q')) { 112 cmdq_error(item, "no alternate screen"); 113 return (NULL); 114 } 115 return (xstrdup("")); 116 } 117 } else 118 gd = wp->base.grid; 119 120 Sflag = args_get(args, 'S'); 121 if (Sflag != NULL && strcmp(Sflag, "-") == 0) 122 top = 0; 123 else { 124 n = args_strtonum(args, 'S', INT_MIN, SHRT_MAX, &cause); 125 if (cause != NULL) { 126 top = gd->hsize; 127 free(cause); 128 } else if (n < 0 && (u_int) -n > gd->hsize) 129 top = 0; 130 else 131 top = gd->hsize + n; 132 if (top > gd->hsize + gd->sy - 1) 133 top = gd->hsize + gd->sy - 1; 134 } 135 136 Eflag = args_get(args, 'E'); 137 if (Eflag != NULL && strcmp(Eflag, "-") == 0) 138 bottom = gd->hsize + gd->sy - 1; 139 else { 140 n = args_strtonum(args, 'E', INT_MIN, SHRT_MAX, &cause); 141 if (cause != NULL) { 142 bottom = gd->hsize + gd->sy - 1; 143 free(cause); 144 } else if (n < 0 && (u_int) -n > gd->hsize) 145 bottom = 0; 146 else 147 bottom = gd->hsize + n; 148 if (bottom > gd->hsize + gd->sy - 1) 149 bottom = gd->hsize + gd->sy - 1; 150 } 151 152 if (bottom < top) { 153 tmp = bottom; 154 bottom = top; 155 top = tmp; 156 } 157 158 with_codes = args_has(args, 'e'); 159 escape_c0 = args_has(args, 'C'); 160 join_lines = args_has(args, 'J'); 161 162 buf = NULL; 163 for (i = top; i <= bottom; i++) { 164 line = grid_string_cells(gd, 0, i, sx, &gc, with_codes, 165 escape_c0, !join_lines); 166 linelen = strlen(line); 167 168 buf = cmd_capture_pane_append(buf, len, line, linelen); 169 170 gl = grid_peek_line(gd, i); 171 if (!join_lines || !(gl->flags & GRID_LINE_WRAPPED)) 172 buf[(*len)++] = '\n'; 173 174 free(line); 175 } 176 return (buf); 177 } 178 179 static enum cmd_retval 180 cmd_capture_pane_exec(struct cmd *self, struct cmdq_item *item) 181 { 182 struct args *args = self->args; 183 struct client *c; 184 struct window_pane *wp = item->state.tflag.wp; 185 char *buf, *cause; 186 const char *bufname; 187 size_t len; 188 189 len = 0; 190 if (args_has(args, 'P')) 191 buf = cmd_capture_pane_pending(args, wp, &len); 192 else 193 buf = cmd_capture_pane_history(args, item, wp, &len); 194 if (buf == NULL) 195 return (CMD_RETURN_ERROR); 196 197 if (args_has(args, 'p')) { 198 c = item->client; 199 if (c == NULL || 200 (c->session != NULL && !(c->flags & CLIENT_CONTROL))) { 201 cmdq_error(item, "can't write to stdout"); 202 free(buf); 203 return (CMD_RETURN_ERROR); 204 } 205 evbuffer_add(c->stdout_data, buf, len); 206 free(buf); 207 if (args_has(args, 'P') && len > 0) 208 evbuffer_add(c->stdout_data, "\n", 1); 209 server_client_push_stdout(c); 210 } else { 211 bufname = NULL; 212 if (args_has(args, 'b')) 213 bufname = args_get(args, 'b'); 214 215 if (paste_set(buf, len, bufname, &cause) != 0) { 216 cmdq_error(item, "%s", cause); 217 free(cause); 218 free(buf); 219 return (CMD_RETURN_ERROR); 220 } 221 } 222 223 return (CMD_RETURN_NORMAL); 224 } 225