Annotation of src/usr.bin/tmux/cmd-load-buffer.c, Revision 1.56
1.56 ! nicm 1: /* $OpenBSD: cmd-load-buffer.c,v 1.55 2019/06/13 21:44:13 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) {
1.53 nicm 88: cmdq_error(item, "-: %s", cause);
1.21 nicm 89: free(cause);
1.54 nicm 90: free(cdata);
1.22 nicm 91: return (CMD_RETURN_ERROR);
1.20 nicm 92: }
1.23 nicm 93: return (CMD_RETURN_WAIT);
1.13 nicm 94: }
95:
1.55 nicm 96: file = server_client_get_path(item->client, path);
1.53 nicm 97: free(path);
98:
1.49 nicm 99: f = fopen(file, "rb");
1.35 nicm 100: if (f == NULL) {
1.49 nicm 101: cmdq_error(item, "%s: %s", file, strerror(errno));
1.51 nicm 102: goto error;
1.1 nicm 103: }
104:
1.11 nicm 105: pdata = NULL;
106: psize = 0;
107: while ((ch = getc(f)) != EOF) {
108: /* Do not let the server die due to memory exhaustion. */
109: if ((new_pdata = realloc(pdata, psize + 2)) == NULL) {
1.46 nicm 110: cmdq_error(item, "realloc error: %s", strerror(errno));
1.11 nicm 111: goto error;
112: }
113: pdata = new_pdata;
114: pdata[psize++] = ch;
1.1 nicm 115: }
1.11 nicm 116: if (ferror(f)) {
1.49 nicm 117: cmdq_error(item, "%s: read error", file);
1.9 nicm 118: goto error;
1.1 nicm 119: }
1.11 nicm 120: if (pdata != NULL)
121: pdata[psize] = '\0';
1.1 nicm 122:
1.13 nicm 123: fclose(f);
1.49 nicm 124: free(file);
1.1 nicm 125:
1.29 nicm 126: if (paste_set(pdata, psize, bufname, &cause) != 0) {
1.46 nicm 127: cmdq_error(item, "%s", cause);
1.21 nicm 128: free(pdata);
1.29 nicm 129: free(cause);
1.22 nicm 130: return (CMD_RETURN_ERROR);
1.1 nicm 131: }
132:
1.22 nicm 133: return (CMD_RETURN_NORMAL);
1.9 nicm 134:
135: error:
1.21 nicm 136: free(pdata);
1.13 nicm 137: if (f != NULL)
138: fclose(f);
1.50 nicm 139: free(file);
1.22 nicm 140: return (CMD_RETURN_ERROR);
1.13 nicm 141: }
142:
1.43 nicm 143: static void
1.20 nicm 144: cmd_load_buffer_callback(struct client *c, int closed, void *data)
1.13 nicm 145: {
1.45 nicm 146: struct cmd_load_buffer_data *cdata = data;
147: char *pdata, *cause, *saved;
148: size_t psize;
1.13 nicm 149:
1.20 nicm 150: if (!closed)
151: return;
152: c->stdin_callback = NULL;
153:
1.34 nicm 154: server_client_unref(c);
1.23 nicm 155: if (c->flags & CLIENT_DEAD)
1.45 nicm 156: goto out;
1.13 nicm 157:
1.20 nicm 158: psize = EVBUFFER_LENGTH(c->stdin_data);
1.29 nicm 159: if (psize == 0 || (pdata = malloc(psize + 1)) == NULL)
1.23 nicm 160: goto out;
1.29 nicm 161:
1.20 nicm 162: memcpy(pdata, EVBUFFER_DATA(c->stdin_data), psize);
1.13 nicm 163: pdata[psize] = '\0';
1.20 nicm 164: evbuffer_drain(c->stdin_data, psize);
1.13 nicm 165:
1.45 nicm 166: if (paste_set(pdata, psize, cdata->bufname, &cause) != 0) {
1.13 nicm 167: /* No context so can't use server_client_msg_error. */
1.38 nicm 168: if (~c->flags & CLIENT_UTF8) {
169: saved = cause;
170: cause = utf8_sanitize(saved);
171: free(saved);
172: }
1.29 nicm 173: evbuffer_add_printf(c->stderr_data, "%s", cause);
1.39 nicm 174: server_client_push_stderr(c);
1.27 nicm 175: free(pdata);
1.29 nicm 176: free(cause);
1.13 nicm 177: }
1.45 nicm 178: out:
1.56 ! nicm 179: cmdq_continue(cdata->item);
1.23 nicm 180:
1.45 nicm 181: free(cdata->bufname);
182: free(cdata);
1.1 nicm 183: }
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