Annotation of src/usr.bin/tmux/cmd-load-buffer.c, Revision 1.14
1.14 ! nicm 1: /* $OpenBSD: cmd-load-buffer.c,v 1.13 2010/07/24 20:11:59 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>
1.11 nicm 22: #include <stdio.h>
1.1 nicm 23: #include <stdlib.h>
24: #include <string.h>
1.12 nicm 25: #include <unistd.h>
1.1 nicm 26:
27: #include "tmux.h"
28:
29: /*
30: * Loads a session paste buffer from a file.
31: */
32:
33: int cmd_load_buffer_exec(struct cmd *, struct cmd_ctx *);
1.13 nicm 34: void cmd_load_buffer_callback(struct client *, void *);
1.1 nicm 35:
36: const struct cmd_entry cmd_load_buffer_entry = {
37: "load-buffer", "loadb",
38: CMD_BUFFER_SESSION_USAGE " path",
1.8 nicm 39: CMD_ARG1, "",
1.1 nicm 40: cmd_buffer_init,
41: cmd_buffer_parse,
42: cmd_load_buffer_exec,
43: cmd_buffer_free,
44: cmd_buffer_print
45: };
46:
1.13 nicm 47: struct cmd_load_buffer_cdata {
48: struct session *session;
49: int buffer;
50: };
51:
1.1 nicm 52: int
53: cmd_load_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
54: {
1.13 nicm 55: struct cmd_buffer_data *data = self->data;
56: struct cmd_load_buffer_cdata *cdata;
57: struct session *s;
58: struct client *c = ctx->cmdclient;
59: FILE *f;
60: char *pdata, *new_pdata;
61: size_t psize;
62: u_int limit;
63: int ch;
1.1 nicm 64:
65: if ((s = cmd_find_session(ctx, data->target)) == NULL)
66: return (-1);
67:
1.13 nicm 68: if (strcmp(data->arg, "-") == 0) {
69: if (c == NULL) {
1.12 nicm 70: ctx->error(ctx, "%s: can't read from stdin", data->arg);
71: return (-1);
72: }
1.13 nicm 73: if (c->flags & CLIENT_TERMINAL) {
1.12 nicm 74: ctx->error(ctx, "%s: stdin is a tty", data->arg);
75: return (-1);
76: }
1.13 nicm 77: if (c->stdin_fd == -1) {
78: ctx->error(ctx, "%s: can't read from stdin", data->arg);
1.12 nicm 79: return (-1);
80: }
1.13 nicm 81:
82: cdata = xmalloc(sizeof *cdata);
83: cdata->session = s;
1.14 ! nicm 84: cdata->session->references++;
1.13 nicm 85: cdata->buffer = data->buffer;
86: c->stdin_data = cdata;
87: c->stdin_callback = cmd_load_buffer_callback;
88:
89: c->references++;
90: bufferevent_enable(c->stdin_event, EV_READ);
91: return (1);
92: }
93:
94: if ((f = fopen(data->arg, "rb")) == NULL) {
95: ctx->error(ctx, "%s: %s", data->arg, strerror(errno));
96: return (-1);
1.1 nicm 97: }
98:
1.11 nicm 99: pdata = NULL;
100: psize = 0;
101: while ((ch = getc(f)) != EOF) {
102: /* Do not let the server die due to memory exhaustion. */
103: if ((new_pdata = realloc(pdata, psize + 2)) == NULL) {
104: ctx->error(ctx, "realloc error: %s", strerror(errno));
105: goto error;
106: }
107: pdata = new_pdata;
108: pdata[psize++] = ch;
1.1 nicm 109: }
1.11 nicm 110: if (ferror(f)) {
111: ctx->error(ctx, "%s: read error", data->arg);
1.9 nicm 112: goto error;
1.1 nicm 113: }
1.11 nicm 114: if (pdata != NULL)
115: pdata[psize] = '\0';
1.1 nicm 116:
1.13 nicm 117: fclose(f);
118: f = NULL;
1.1 nicm 119:
120: limit = options_get_number(&s->options, "buffer-limit");
121: if (data->buffer == -1) {
1.9 nicm 122: paste_add(&s->buffers, pdata, psize, limit);
1.1 nicm 123: return (0);
124: }
1.9 nicm 125: if (paste_replace(&s->buffers, data->buffer, pdata, psize) != 0) {
1.1 nicm 126: ctx->error(ctx, "no buffer %d", data->buffer);
1.13 nicm 127: return (-1);
1.1 nicm 128: }
129:
130: return (0);
1.9 nicm 131:
132: error:
133: if (pdata != NULL)
134: xfree(pdata);
1.13 nicm 135: if (f != NULL)
136: fclose(f);
1.9 nicm 137: return (-1);
1.13 nicm 138: }
139:
140: void
141: cmd_load_buffer_callback(struct client *c, void *data)
142: {
143: struct cmd_load_buffer_cdata *cdata = data;
144: struct session *s = cdata->session;
145: char *pdata;
146: size_t psize;
147: u_int limit;
148:
149: /*
150: * Event callback has already checked client is not dead and reduced
151: * its reference count. But tell it to exit.
152: */
153: c->flags |= CLIENT_EXIT;
154:
155: /* Does the target session still exist? */
1.14 ! nicm 156: if (!session_alive(s))
1.13 nicm 157: goto out;
158:
159: psize = EVBUFFER_LENGTH(c->stdin_event->input);
160: if (psize == 0)
161: goto out;
162:
163: pdata = malloc(psize + 1);
164: if (pdata == NULL)
165: goto out;
166: bufferevent_read(c->stdin_event, pdata, psize);
167: pdata[psize] = '\0';
168:
169: limit = options_get_number(&s->options, "buffer-limit");
170: if (cdata->buffer == -1) {
171: paste_add(&s->buffers, pdata, psize, limit);
172: goto out;
173: }
174: if (paste_replace(&s->buffers, cdata->buffer, pdata, psize) != 0) {
175: /* No context so can't use server_client_msg_error. */
176: evbuffer_add_printf(
177: c->stderr_event->output, "no buffer %d\n", cdata->buffer);
178: bufferevent_enable(c->stderr_event, EV_WRITE);
179: goto out;
180: }
181:
182: out:
1.14 ! nicm 183: cdata->session->references--;
1.13 nicm 184: xfree(cdata);
1.1 nicm 185: }
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