Annotation of src/usr.bin/tmux/cmd-load-buffer.c, Revision 1.24
1.24 ! nicm 1: /* $OpenBSD: cmd-load-buffer.c,v 1.23 2013/03/24 09:54:10 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: /*
1.18 nicm 30: * Loads a paste buffer from a file.
1.1 nicm 31: */
32:
1.23 nicm 33: enum cmd_retval cmd_load_buffer_exec(struct cmd *, struct cmd_q *);
1.22 nicm 34: void cmd_load_buffer_callback(struct client *, int, void *);
1.1 nicm 35:
36: const struct cmd_entry cmd_load_buffer_entry = {
37: "load-buffer", "loadb",
1.16 nicm 38: "b:", 1, 1,
1.15 nicm 39: CMD_BUFFER_USAGE " path",
1.16 nicm 40: 0,
41: NULL,
42: cmd_load_buffer_exec
1.1 nicm 43: };
44:
1.22 nicm 45: enum cmd_retval
1.23 nicm 46: cmd_load_buffer_exec(struct cmd *self, struct cmd_q *cmdq)
1.1 nicm 47: {
1.16 nicm 48: struct args *args = self->args;
1.23 nicm 49: struct client *c = cmdq->client;
1.19 nicm 50: struct session *s;
1.16 nicm 51: FILE *f;
1.19 nicm 52: const char *path, *newpath, *wd;
1.16 nicm 53: char *pdata, *new_pdata, *cause;
54: size_t psize;
55: u_int limit;
1.20 nicm 56: int ch, error, buffer, *buffer_ptr;
1.16 nicm 57:
58: if (!args_has(args, 'b'))
59: buffer = -1;
60: else {
61: buffer = args_strtonum(args, 'b', 0, INT_MAX, &cause);
62: if (cause != NULL) {
1.23 nicm 63: cmdq_error(cmdq, "buffer %s", cause);
1.21 nicm 64: free(cause);
1.22 nicm 65: return (CMD_RETURN_ERROR);
1.16 nicm 66: }
67: }
1.1 nicm 68:
1.16 nicm 69: path = args->argv[0];
70: if (strcmp(path, "-") == 0) {
71: buffer_ptr = xmalloc(sizeof *buffer_ptr);
72: *buffer_ptr = buffer;
73:
1.20 nicm 74: error = server_set_stdin_callback (c, cmd_load_buffer_callback,
75: buffer_ptr, &cause);
76: if (error != 0) {
1.23 nicm 77: cmdq_error(cmdq, "%s: %s", path, cause);
1.21 nicm 78: free(cause);
1.22 nicm 79: return (CMD_RETURN_ERROR);
1.20 nicm 80: }
1.23 nicm 81: return (CMD_RETURN_WAIT);
1.13 nicm 82: }
83:
1.19 nicm 84: if (c != NULL)
85: wd = c->cwd;
1.23 nicm 86: else if ((s = cmd_current_session(cmdq, 0)) != NULL) {
1.19 nicm 87: wd = options_get_string(&s->options, "default-path");
88: if (*wd == '\0')
89: wd = s->cwd;
90: } else
91: wd = NULL;
92: if (wd != NULL && *wd != '\0') {
93: newpath = get_full_path(wd, path);
94: if (newpath != NULL)
95: path = newpath;
96: }
1.16 nicm 97: if ((f = fopen(path, "rb")) == NULL) {
1.23 nicm 98: cmdq_error(cmdq, "%s: %s", path, strerror(errno));
1.22 nicm 99: return (CMD_RETURN_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) {
1.23 nicm 107: cmdq_error(cmdq, "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)) {
1.23 nicm 114: cmdq_error(cmdq, "%s: read error", path);
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);
1.1 nicm 121:
1.15 nicm 122: limit = options_get_number(&global_options, "buffer-limit");
1.16 nicm 123: if (buffer == -1) {
1.15 nicm 124: paste_add(&global_buffers, pdata, psize, limit);
1.22 nicm 125: return (CMD_RETURN_NORMAL);
1.1 nicm 126: }
1.16 nicm 127: if (paste_replace(&global_buffers, buffer, pdata, psize) != 0) {
1.23 nicm 128: cmdq_error(cmdq, "no buffer %d", buffer);
1.21 nicm 129: free(pdata);
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);
1.22 nicm 139: return (CMD_RETURN_ERROR);
1.13 nicm 140: }
141:
142: void
1.20 nicm 143: cmd_load_buffer_callback(struct client *c, int closed, void *data)
1.13 nicm 144: {
1.16 nicm 145: int *buffer = data;
1.15 nicm 146: char *pdata;
147: size_t psize;
148: u_int limit;
1.13 nicm 149:
1.20 nicm 150: if (!closed)
151: return;
152: c->stdin_callback = NULL;
153:
154: c->references--;
1.23 nicm 155: if (c->flags & CLIENT_DEAD)
156: return;
1.13 nicm 157:
1.20 nicm 158: psize = EVBUFFER_LENGTH(c->stdin_data);
1.16 nicm 159: if (psize == 0 || (pdata = malloc(psize + 1)) == NULL) {
1.21 nicm 160: free(data);
1.23 nicm 161: goto out;
1.16 nicm 162: }
1.20 nicm 163: memcpy(pdata, EVBUFFER_DATA(c->stdin_data), psize);
1.13 nicm 164: pdata[psize] = '\0';
1.20 nicm 165: evbuffer_drain(c->stdin_data, psize);
1.13 nicm 166:
1.15 nicm 167: limit = options_get_number(&global_options, "buffer-limit");
168: if (*buffer == -1)
169: paste_add(&global_buffers, pdata, psize, limit);
170: else if (paste_replace(&global_buffers, *buffer, pdata, psize) != 0) {
1.13 nicm 171: /* No context so can't use server_client_msg_error. */
1.20 nicm 172: evbuffer_add_printf(c->stderr_data, "no buffer %d\n", *buffer);
173: server_push_stderr(c);
1.13 nicm 174: }
1.16 nicm 175:
1.21 nicm 176: free(data);
1.23 nicm 177:
178: out:
179: cmdq_continue(c->cmdq);
1.1 nicm 180: }
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