Annotation of src/usr.bin/tmux/cmd-load-buffer.c, Revision 1.13
1.13 ! nicm 1: /* $OpenBSD: cmd-load-buffer.c,v 1.12 2010/06/28 22:10:42 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;
! 84: cdata->buffer = data->buffer;
! 85: c->stdin_data = cdata;
! 86: c->stdin_callback = cmd_load_buffer_callback;
! 87:
! 88: c->references++;
! 89: bufferevent_enable(c->stdin_event, EV_READ);
! 90: return (1);
! 91: }
! 92:
! 93: if ((f = fopen(data->arg, "rb")) == NULL) {
! 94: ctx->error(ctx, "%s: %s", data->arg, strerror(errno));
! 95: return (-1);
1.1 nicm 96: }
97:
1.11 nicm 98: pdata = NULL;
99: psize = 0;
100: while ((ch = getc(f)) != EOF) {
101: /* Do not let the server die due to memory exhaustion. */
102: if ((new_pdata = realloc(pdata, psize + 2)) == NULL) {
103: ctx->error(ctx, "realloc error: %s", strerror(errno));
104: goto error;
105: }
106: pdata = new_pdata;
107: pdata[psize++] = ch;
1.1 nicm 108: }
1.11 nicm 109: if (ferror(f)) {
110: ctx->error(ctx, "%s: read error", data->arg);
1.9 nicm 111: goto error;
1.1 nicm 112: }
1.11 nicm 113: if (pdata != NULL)
114: pdata[psize] = '\0';
1.1 nicm 115:
1.13 ! nicm 116: fclose(f);
! 117: f = NULL;
1.1 nicm 118:
119: limit = options_get_number(&s->options, "buffer-limit");
120: if (data->buffer == -1) {
1.9 nicm 121: paste_add(&s->buffers, pdata, psize, limit);
1.1 nicm 122: return (0);
123: }
1.9 nicm 124: if (paste_replace(&s->buffers, data->buffer, pdata, psize) != 0) {
1.1 nicm 125: ctx->error(ctx, "no buffer %d", data->buffer);
1.13 ! nicm 126: return (-1);
1.1 nicm 127: }
128:
129: return (0);
1.9 nicm 130:
131: error:
132: if (pdata != NULL)
133: xfree(pdata);
1.13 ! nicm 134: if (f != NULL)
! 135: fclose(f);
1.9 nicm 136: return (-1);
1.13 ! nicm 137: }
! 138:
! 139: void
! 140: cmd_load_buffer_callback(struct client *c, void *data)
! 141: {
! 142: struct cmd_load_buffer_cdata *cdata = data;
! 143: struct session *s = cdata->session;
! 144: char *pdata;
! 145: size_t psize;
! 146: u_int limit;
! 147: int idx;
! 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? */
! 156: if (session_index(s, &idx) != 0)
! 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:
! 183: xfree(cdata);
1.1 nicm 184: }
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