Annotation of src/usr.bin/tmux/cmd-load-buffer.c, Revision 1.35
1.35 ! nicm 1: /* $OpenBSD: cmd-load-buffer.c,v 1.34 2015/06/05 18:06:30 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:
1.23 nicm 34: enum cmd_retval cmd_load_buffer_exec(struct cmd *, struct cmd_q *);
1.22 nicm 35: void cmd_load_buffer_callback(struct client *, int, void *);
1.1 nicm 36:
37: const struct cmd_entry cmd_load_buffer_entry = {
38: "load-buffer", "loadb",
1.16 nicm 39: "b:", 1, 1,
1.15 nicm 40: CMD_BUFFER_USAGE " path",
1.16 nicm 41: 0,
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;
1.35 ! nicm 52: const char *path, *bufname, *cwd;
! 53: char *pdata, *new_pdata, *cause, *file, resolved[PATH_MAX];
1.16 nicm 54: size_t psize;
1.35 ! nicm 55: int ch, error;
1.16 nicm 56:
1.29 nicm 57: bufname = NULL;
58: if (args_has(args, 'b'))
59: bufname = args_get(args, 'b');
1.1 nicm 60:
1.16 nicm 61: path = args->argv[0];
62: if (strcmp(path, "-") == 0) {
1.26 nicm 63: error = server_set_stdin_callback(c, cmd_load_buffer_callback,
1.30 nicm 64: (void *)bufname, &cause);
1.20 nicm 65: if (error != 0) {
1.23 nicm 66: cmdq_error(cmdq, "%s: %s", path, cause);
1.21 nicm 67: free(cause);
1.22 nicm 68: return (CMD_RETURN_ERROR);
1.20 nicm 69: }
1.23 nicm 70: return (CMD_RETURN_WAIT);
1.13 nicm 71: }
72:
1.25 nicm 73: if (c != NULL && c->session == NULL)
74: cwd = c->cwd;
1.32 nicm 75: else if ((s = cmd_find_current(cmdq)) != NULL)
1.25 nicm 76: cwd = s->cwd;
77: else
1.35 ! nicm 78: cwd = ".";
1.25 nicm 79:
1.35 ! nicm 80: xasprintf(&file, "%s/%s", cwd, path);
! 81: if (realpath(file, resolved) == NULL)
! 82: f = NULL;
! 83: else
! 84: f = fopen(resolved, "rb");
! 85: free(file);
! 86: if (f == NULL) {
! 87: cmdq_error(cmdq, "%s: %s", resolved, strerror(errno));
1.22 nicm 88: return (CMD_RETURN_ERROR);
1.1 nicm 89: }
90:
1.11 nicm 91: pdata = NULL;
92: psize = 0;
93: while ((ch = getc(f)) != EOF) {
94: /* Do not let the server die due to memory exhaustion. */
95: if ((new_pdata = realloc(pdata, psize + 2)) == NULL) {
1.23 nicm 96: cmdq_error(cmdq, "realloc error: %s", strerror(errno));
1.11 nicm 97: goto error;
98: }
99: pdata = new_pdata;
100: pdata[psize++] = ch;
1.1 nicm 101: }
1.11 nicm 102: if (ferror(f)) {
1.35 ! nicm 103: cmdq_error(cmdq, "%s: read error", resolved);
1.9 nicm 104: goto error;
1.1 nicm 105: }
1.11 nicm 106: if (pdata != NULL)
107: pdata[psize] = '\0';
1.1 nicm 108:
1.13 nicm 109: fclose(f);
1.1 nicm 110:
1.29 nicm 111: if (paste_set(pdata, psize, bufname, &cause) != 0) {
112: cmdq_error(cmdq, "%s", cause);
1.21 nicm 113: free(pdata);
1.29 nicm 114: free(cause);
1.22 nicm 115: return (CMD_RETURN_ERROR);
1.1 nicm 116: }
117:
1.22 nicm 118: return (CMD_RETURN_NORMAL);
1.9 nicm 119:
120: error:
1.21 nicm 121: free(pdata);
1.13 nicm 122: if (f != NULL)
123: fclose(f);
1.22 nicm 124: return (CMD_RETURN_ERROR);
1.13 nicm 125: }
126:
127: void
1.20 nicm 128: cmd_load_buffer_callback(struct client *c, int closed, void *data)
1.13 nicm 129: {
1.29 nicm 130: const char *bufname = data;
131: char *pdata, *cause;
132: size_t psize;
1.13 nicm 133:
1.20 nicm 134: if (!closed)
135: return;
136: c->stdin_callback = NULL;
137:
1.34 nicm 138: server_client_unref(c);
1.23 nicm 139: if (c->flags & CLIENT_DEAD)
140: return;
1.13 nicm 141:
1.20 nicm 142: psize = EVBUFFER_LENGTH(c->stdin_data);
1.29 nicm 143: if (psize == 0 || (pdata = malloc(psize + 1)) == NULL)
1.23 nicm 144: goto out;
1.29 nicm 145:
1.20 nicm 146: memcpy(pdata, EVBUFFER_DATA(c->stdin_data), psize);
1.13 nicm 147: pdata[psize] = '\0';
1.20 nicm 148: evbuffer_drain(c->stdin_data, psize);
1.13 nicm 149:
1.29 nicm 150: if (paste_set(pdata, psize, bufname, &cause) != 0) {
1.13 nicm 151: /* No context so can't use server_client_msg_error. */
1.29 nicm 152: evbuffer_add_printf(c->stderr_data, "%s", cause);
1.20 nicm 153: server_push_stderr(c);
1.27 nicm 154: free(pdata);
1.29 nicm 155: free(cause);
1.13 nicm 156: }
1.23 nicm 157:
158: out:
159: cmdq_continue(c->cmdq);
1.1 nicm 160: }
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