Annotation of src/usr.bin/tmux/cmd-load-buffer.c, Revision 1.20
1.20 ! nicm 1: /* $OpenBSD: cmd-load-buffer.c,v 1.19 2011/10/23 08:34:01 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:
33: int cmd_load_buffer_exec(struct cmd *, struct cmd_ctx *);
1.20 ! 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: NULL,
43: cmd_load_buffer_exec
1.1 nicm 44: };
45:
46: int
47: cmd_load_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
48: {
1.16 nicm 49: struct args *args = self->args;
50: struct client *c = ctx->cmdclient;
1.19 nicm 51: struct session *s;
1.16 nicm 52: FILE *f;
1.19 nicm 53: const char *path, *newpath, *wd;
1.16 nicm 54: char *pdata, *new_pdata, *cause;
55: size_t psize;
56: u_int limit;
1.20 ! nicm 57: int ch, error, buffer, *buffer_ptr;
1.16 nicm 58:
59: if (!args_has(args, 'b'))
60: buffer = -1;
61: else {
62: buffer = args_strtonum(args, 'b', 0, INT_MAX, &cause);
63: if (cause != NULL) {
64: ctx->error(ctx, "buffer %s", cause);
65: xfree(cause);
66: return (-1);
67: }
68: }
1.1 nicm 69:
1.16 nicm 70: path = args->argv[0];
71: if (strcmp(path, "-") == 0) {
72: buffer_ptr = xmalloc(sizeof *buffer_ptr);
73: *buffer_ptr = buffer;
74:
1.20 ! nicm 75: error = server_set_stdin_callback (c, cmd_load_buffer_callback,
! 76: buffer_ptr, &cause);
! 77: if (error != 0) {
! 78: ctx->error(ctx, "%s: %s", path, cause);
! 79: xfree(cause);
! 80: return (-1);
! 81: }
1.13 nicm 82: return (1);
83: }
84:
1.19 nicm 85: if (c != NULL)
86: wd = c->cwd;
87: else if ((s = cmd_current_session(ctx, 0)) != NULL) {
88: wd = options_get_string(&s->options, "default-path");
89: if (*wd == '\0')
90: wd = s->cwd;
91: } else
92: wd = NULL;
93: if (wd != NULL && *wd != '\0') {
94: newpath = get_full_path(wd, path);
95: if (newpath != NULL)
96: path = newpath;
97: }
1.16 nicm 98: if ((f = fopen(path, "rb")) == NULL) {
99: ctx->error(ctx, "%s: %s", path, strerror(errno));
1.13 nicm 100: return (-1);
1.1 nicm 101: }
102:
1.11 nicm 103: pdata = NULL;
104: psize = 0;
105: while ((ch = getc(f)) != EOF) {
106: /* Do not let the server die due to memory exhaustion. */
107: if ((new_pdata = realloc(pdata, psize + 2)) == NULL) {
108: ctx->error(ctx, "realloc error: %s", strerror(errno));
109: goto error;
110: }
111: pdata = new_pdata;
112: pdata[psize++] = ch;
1.1 nicm 113: }
1.11 nicm 114: if (ferror(f)) {
1.16 nicm 115: ctx->error(ctx, "%s: read error", path);
1.9 nicm 116: goto error;
1.1 nicm 117: }
1.11 nicm 118: if (pdata != NULL)
119: pdata[psize] = '\0';
1.1 nicm 120:
1.13 nicm 121: fclose(f);
1.1 nicm 122:
1.15 nicm 123: limit = options_get_number(&global_options, "buffer-limit");
1.16 nicm 124: if (buffer == -1) {
1.15 nicm 125: paste_add(&global_buffers, pdata, psize, limit);
1.1 nicm 126: return (0);
127: }
1.16 nicm 128: if (paste_replace(&global_buffers, buffer, pdata, psize) != 0) {
129: ctx->error(ctx, "no buffer %d", buffer);
1.18 nicm 130: xfree(pdata);
1.13 nicm 131: return (-1);
1.1 nicm 132: }
133:
134: return (0);
1.9 nicm 135:
136: error:
137: if (pdata != NULL)
138: xfree(pdata);
1.13 nicm 139: if (f != NULL)
140: fclose(f);
1.9 nicm 141: return (-1);
1.13 nicm 142: }
143:
144: void
1.20 ! nicm 145: cmd_load_buffer_callback(struct client *c, int closed, void *data)
1.13 nicm 146: {
1.16 nicm 147: int *buffer = data;
1.15 nicm 148: char *pdata;
149: size_t psize;
150: u_int limit;
1.13 nicm 151:
1.20 ! nicm 152: if (!closed)
! 153: return;
! 154: c->stdin_callback = NULL;
! 155:
! 156: c->references--;
1.13 nicm 157: c->flags |= CLIENT_EXIT;
158:
1.20 ! nicm 159: psize = EVBUFFER_LENGTH(c->stdin_data);
1.16 nicm 160: if (psize == 0 || (pdata = malloc(psize + 1)) == NULL) {
1.17 nicm 161: xfree(data);
1.15 nicm 162: return;
1.16 nicm 163: }
1.20 ! nicm 164: memcpy(pdata, EVBUFFER_DATA(c->stdin_data), psize);
1.13 nicm 165: pdata[psize] = '\0';
1.20 ! nicm 166: evbuffer_drain(c->stdin_data, psize);
1.13 nicm 167:
1.15 nicm 168: limit = options_get_number(&global_options, "buffer-limit");
169: if (*buffer == -1)
170: paste_add(&global_buffers, pdata, psize, limit);
171: else if (paste_replace(&global_buffers, *buffer, pdata, psize) != 0) {
1.13 nicm 172: /* No context so can't use server_client_msg_error. */
1.20 ! nicm 173: evbuffer_add_printf(c->stderr_data, "no buffer %d\n", *buffer);
! 174: server_push_stderr(c);
1.13 nicm 175: }
1.16 nicm 176:
1.17 nicm 177: xfree(data);
1.1 nicm 178: }
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