Annotation of src/usr.bin/tmux/cmd-load-buffer.c, Revision 1.52
1.52 ! nicm 1: /* $OpenBSD: cmd-load-buffer.c,v 1.51 2018/01/15 15:27:03 nicm Exp $ */
1.1 nicm 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:
1.12 nicm 19: #include <sys/types.h>
20:
1.1 nicm 21: #include <errno.h>
1.25 nicm 22: #include <fcntl.h>
1.11 nicm 23: #include <stdio.h>
1.1 nicm 24: #include <stdlib.h>
25: #include <string.h>
1.12 nicm 26: #include <unistd.h>
1.1 nicm 27:
28: #include "tmux.h"
29:
30: /*
1.18 nicm 31: * Loads a paste buffer from a file.
1.1 nicm 32: */
33:
1.46 nicm 34: static enum cmd_retval cmd_load_buffer_exec(struct cmd *, struct cmdq_item *);
1.43 nicm 35:
1.46 nicm 36: static void cmd_load_buffer_callback(struct client *, int, void *);
1.1 nicm 37:
38: const struct cmd_entry cmd_load_buffer_entry = {
1.41 nicm 39: .name = "load-buffer",
40: .alias = "loadb",
41:
42: .args = { "b:", 1, 1 },
43: .usage = CMD_BUFFER_USAGE " path",
44:
1.44 nicm 45: .flags = CMD_AFTERHOOK,
1.41 nicm 46: .exec = cmd_load_buffer_exec
1.1 nicm 47: };
48:
1.45 nicm 49: struct cmd_load_buffer_data {
1.46 nicm 50: struct cmdq_item *item;
51: char *bufname;
1.45 nicm 52: };
53:
1.43 nicm 54: static enum cmd_retval
1.46 nicm 55: cmd_load_buffer_exec(struct cmd *self, struct cmdq_item *item)
1.1 nicm 56: {
1.45 nicm 57: struct args *args = self->args;
58: struct cmd_load_buffer_data *cdata;
1.52 ! nicm 59: struct client *c = cmd_find_client(item, NULL, 1);
! 60: struct session *s = item->target.s;
! 61: struct winlink *wl = item->target.wl;
! 62: struct window_pane *wp = item->target.wp;
1.45 nicm 63: FILE *f;
1.52 ! nicm 64: const char *bufname;
1.51 nicm 65: char *pdata = NULL, *new_pdata, *cause;
1.52 ! nicm 66: char *path, *file;
1.45 nicm 67: size_t psize;
68: int ch, error;
1.16 nicm 69:
1.29 nicm 70: bufname = NULL;
71: if (args_has(args, 'b'))
72: bufname = args_get(args, 'b');
1.1 nicm 73:
1.52 ! nicm 74: path = format_single(item, args->argv[0], c, s, wl, wp);
1.16 nicm 75: if (strcmp(path, "-") == 0) {
1.52 ! nicm 76: free(path);
! 77: c = item->client;
! 78:
1.45 nicm 79: cdata = xcalloc(1, sizeof *cdata);
1.46 nicm 80: cdata->item = item;
1.47 nicm 81:
82: if (bufname != NULL)
83: cdata->bufname = xstrdup(bufname);
1.45 nicm 84:
1.26 nicm 85: error = server_set_stdin_callback(c, cmd_load_buffer_callback,
1.45 nicm 86: cdata, &cause);
1.20 nicm 87: if (error != 0) {
1.46 nicm 88: cmdq_error(item, "%s: %s", path, cause);
1.21 nicm 89: free(cause);
1.22 nicm 90: return (CMD_RETURN_ERROR);
1.20 nicm 91: }
1.23 nicm 92: return (CMD_RETURN_WAIT);
1.13 nicm 93: }
94:
1.49 nicm 95: file = server_client_get_path(c, path);
96: f = fopen(file, "rb");
1.35 nicm 97: if (f == NULL) {
1.49 nicm 98: cmdq_error(item, "%s: %s", file, strerror(errno));
1.51 nicm 99: goto error;
1.1 nicm 100: }
101:
1.11 nicm 102: pdata = NULL;
103: psize = 0;
104: while ((ch = getc(f)) != EOF) {
105: /* Do not let the server die due to memory exhaustion. */
106: if ((new_pdata = realloc(pdata, psize + 2)) == NULL) {
1.46 nicm 107: cmdq_error(item, "realloc error: %s", strerror(errno));
1.11 nicm 108: goto error;
109: }
110: pdata = new_pdata;
111: pdata[psize++] = ch;
1.1 nicm 112: }
1.11 nicm 113: if (ferror(f)) {
1.49 nicm 114: cmdq_error(item, "%s: read error", file);
1.9 nicm 115: goto error;
1.1 nicm 116: }
1.11 nicm 117: if (pdata != NULL)
118: pdata[psize] = '\0';
1.1 nicm 119:
1.13 nicm 120: fclose(f);
1.49 nicm 121: free(file);
1.1 nicm 122:
1.29 nicm 123: if (paste_set(pdata, psize, bufname, &cause) != 0) {
1.46 nicm 124: cmdq_error(item, "%s", cause);
1.21 nicm 125: free(pdata);
1.29 nicm 126: free(cause);
1.22 nicm 127: return (CMD_RETURN_ERROR);
1.1 nicm 128: }
129:
1.22 nicm 130: return (CMD_RETURN_NORMAL);
1.9 nicm 131:
132: error:
1.21 nicm 133: free(pdata);
1.13 nicm 134: if (f != NULL)
135: fclose(f);
1.50 nicm 136: free(file);
1.22 nicm 137: return (CMD_RETURN_ERROR);
1.13 nicm 138: }
139:
1.43 nicm 140: static void
1.20 nicm 141: cmd_load_buffer_callback(struct client *c, int closed, void *data)
1.13 nicm 142: {
1.45 nicm 143: struct cmd_load_buffer_data *cdata = data;
144: char *pdata, *cause, *saved;
145: size_t psize;
1.13 nicm 146:
1.20 nicm 147: if (!closed)
148: return;
149: c->stdin_callback = NULL;
150:
1.34 nicm 151: server_client_unref(c);
1.23 nicm 152: if (c->flags & CLIENT_DEAD)
1.45 nicm 153: goto out;
1.13 nicm 154:
1.20 nicm 155: psize = EVBUFFER_LENGTH(c->stdin_data);
1.29 nicm 156: if (psize == 0 || (pdata = malloc(psize + 1)) == NULL)
1.23 nicm 157: goto out;
1.29 nicm 158:
1.20 nicm 159: memcpy(pdata, EVBUFFER_DATA(c->stdin_data), psize);
1.13 nicm 160: pdata[psize] = '\0';
1.20 nicm 161: evbuffer_drain(c->stdin_data, psize);
1.13 nicm 162:
1.45 nicm 163: if (paste_set(pdata, psize, cdata->bufname, &cause) != 0) {
1.13 nicm 164: /* No context so can't use server_client_msg_error. */
1.38 nicm 165: if (~c->flags & CLIENT_UTF8) {
166: saved = cause;
167: cause = utf8_sanitize(saved);
168: free(saved);
169: }
1.29 nicm 170: evbuffer_add_printf(c->stderr_data, "%s", cause);
1.39 nicm 171: server_client_push_stderr(c);
1.27 nicm 172: free(pdata);
1.29 nicm 173: free(cause);
1.13 nicm 174: }
1.45 nicm 175: out:
1.46 nicm 176: cdata->item->flags &= ~CMDQ_WAITING;
1.23 nicm 177:
1.45 nicm 178: free(cdata->bufname);
179: free(cdata);
1.1 nicm 180: }