Annotation of src/usr.bin/tmux/cmd-load-buffer.c, Revision 1.44
1.44 ! nicm 1: /* $OpenBSD: cmd-load-buffer.c,v 1.43 2016/10/10 21:51:39 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:
1.43 nicm 34: static enum cmd_retval cmd_load_buffer_exec(struct cmd *, struct cmd_q *);
35:
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:
1.43 nicm 49: static enum cmd_retval
1.23 nicm 50: cmd_load_buffer_exec(struct cmd *self, struct cmd_q *cmdq)
1.1 nicm 51: {
1.16 nicm 52: struct args *args = self->args;
1.23 nicm 53: struct client *c = cmdq->client;
1.19 nicm 54: struct session *s;
1.16 nicm 55: FILE *f;
1.35 nicm 56: const char *path, *bufname, *cwd;
57: char *pdata, *new_pdata, *cause, *file, resolved[PATH_MAX];
1.16 nicm 58: size_t psize;
1.35 nicm 59: int ch, error;
1.16 nicm 60:
1.29 nicm 61: bufname = NULL;
62: if (args_has(args, 'b'))
63: bufname = args_get(args, 'b');
1.1 nicm 64:
1.16 nicm 65: path = args->argv[0];
66: if (strcmp(path, "-") == 0) {
1.26 nicm 67: error = server_set_stdin_callback(c, cmd_load_buffer_callback,
1.30 nicm 68: (void *)bufname, &cause);
1.20 nicm 69: if (error != 0) {
1.23 nicm 70: cmdq_error(cmdq, "%s: %s", path, cause);
1.21 nicm 71: free(cause);
1.22 nicm 72: return (CMD_RETURN_ERROR);
1.20 nicm 73: }
1.23 nicm 74: return (CMD_RETURN_WAIT);
1.13 nicm 75: }
76:
1.42 nicm 77: if (c != NULL && c->session == NULL && c->cwd != NULL)
1.25 nicm 78: cwd = c->cwd;
1.42 nicm 79: else if ((s = c->session) != NULL && s->cwd != NULL)
1.25 nicm 80: cwd = s->cwd;
81: else
1.35 nicm 82: cwd = ".";
1.25 nicm 83:
1.36 nicm 84: if (*path == '/')
85: file = xstrdup(path);
1.35 nicm 86: else
1.36 nicm 87: xasprintf(&file, "%s/%s", cwd, path);
1.37 nicm 88: if (realpath(file, resolved) == NULL &&
89: strlcpy(resolved, file, sizeof resolved) >= sizeof resolved) {
90: cmdq_error(cmdq, "%s: %s", file, strerror(ENAMETOOLONG));
1.36 nicm 91: return (CMD_RETURN_ERROR);
92: }
93: f = fopen(resolved, "rb");
1.35 nicm 94: free(file);
95: if (f == NULL) {
96: cmdq_error(cmdq, "%s: %s", resolved, strerror(errno));
1.22 nicm 97: return (CMD_RETURN_ERROR);
1.1 nicm 98: }
99:
1.11 nicm 100: pdata = NULL;
101: psize = 0;
102: while ((ch = getc(f)) != EOF) {
103: /* Do not let the server die due to memory exhaustion. */
104: if ((new_pdata = realloc(pdata, psize + 2)) == NULL) {
1.23 nicm 105: cmdq_error(cmdq, "realloc error: %s", strerror(errno));
1.11 nicm 106: goto error;
107: }
108: pdata = new_pdata;
109: pdata[psize++] = ch;
1.1 nicm 110: }
1.11 nicm 111: if (ferror(f)) {
1.35 nicm 112: cmdq_error(cmdq, "%s: read error", resolved);
1.9 nicm 113: goto error;
1.1 nicm 114: }
1.11 nicm 115: if (pdata != NULL)
116: pdata[psize] = '\0';
1.1 nicm 117:
1.13 nicm 118: fclose(f);
1.1 nicm 119:
1.29 nicm 120: if (paste_set(pdata, psize, bufname, &cause) != 0) {
121: cmdq_error(cmdq, "%s", cause);
1.21 nicm 122: free(pdata);
1.29 nicm 123: free(cause);
1.22 nicm 124: return (CMD_RETURN_ERROR);
1.1 nicm 125: }
126:
1.22 nicm 127: return (CMD_RETURN_NORMAL);
1.9 nicm 128:
129: error:
1.21 nicm 130: free(pdata);
1.13 nicm 131: if (f != NULL)
132: fclose(f);
1.22 nicm 133: return (CMD_RETURN_ERROR);
1.13 nicm 134: }
135:
1.43 nicm 136: static void
1.20 nicm 137: cmd_load_buffer_callback(struct client *c, int closed, void *data)
1.13 nicm 138: {
1.29 nicm 139: const char *bufname = data;
1.38 nicm 140: char *pdata, *cause, *saved;
1.29 nicm 141: size_t psize;
1.13 nicm 142:
1.20 nicm 143: if (!closed)
144: return;
145: c->stdin_callback = NULL;
146:
1.34 nicm 147: server_client_unref(c);
1.23 nicm 148: if (c->flags & CLIENT_DEAD)
149: return;
1.13 nicm 150:
1.20 nicm 151: psize = EVBUFFER_LENGTH(c->stdin_data);
1.29 nicm 152: if (psize == 0 || (pdata = malloc(psize + 1)) == NULL)
1.23 nicm 153: goto out;
1.29 nicm 154:
1.20 nicm 155: memcpy(pdata, EVBUFFER_DATA(c->stdin_data), psize);
1.13 nicm 156: pdata[psize] = '\0';
1.20 nicm 157: evbuffer_drain(c->stdin_data, psize);
1.13 nicm 158:
1.29 nicm 159: if (paste_set(pdata, psize, bufname, &cause) != 0) {
1.13 nicm 160: /* No context so can't use server_client_msg_error. */
1.38 nicm 161: if (~c->flags & CLIENT_UTF8) {
162: saved = cause;
163: cause = utf8_sanitize(saved);
164: free(saved);
165: }
1.29 nicm 166: evbuffer_add_printf(c->stderr_data, "%s", cause);
1.39 nicm 167: server_client_push_stderr(c);
1.27 nicm 168: free(pdata);
1.29 nicm 169: free(cause);
1.13 nicm 170: }
1.23 nicm 171:
172: out:
173: cmdq_continue(c->cmdq);
1.1 nicm 174: }
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