Annotation of src/usr.bin/tmux/cmd-load-buffer.c, Revision 1.31
1.31 ! nicm 1: /* $OpenBSD: cmd-load-buffer.c,v 1.30 2014/09/01 21:50:18 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;
1.29 nicm 52: const char *path, *bufname;
1.16 nicm 53: char *pdata, *new_pdata, *cause;
54: size_t psize;
1.29 nicm 55: int ch, error, cwd, fd;
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;
75: else if ((s = cmd_current_session(cmdq, 0)) != NULL)
76: cwd = s->cwd;
77: else
78: cwd = AT_FDCWD;
79:
80: if ((fd = openat(cwd, path, O_RDONLY)) == -1 ||
81: (f = fdopen(fd, "rb")) == NULL) {
82: if (fd != -1)
83: close(fd);
1.23 nicm 84: cmdq_error(cmdq, "%s: %s", path, strerror(errno));
1.22 nicm 85: return (CMD_RETURN_ERROR);
1.1 nicm 86: }
87:
1.11 nicm 88: pdata = NULL;
89: psize = 0;
90: while ((ch = getc(f)) != EOF) {
91: /* Do not let the server die due to memory exhaustion. */
92: if ((new_pdata = realloc(pdata, psize + 2)) == NULL) {
1.23 nicm 93: cmdq_error(cmdq, "realloc error: %s", strerror(errno));
1.11 nicm 94: goto error;
95: }
96: pdata = new_pdata;
97: pdata[psize++] = ch;
1.1 nicm 98: }
1.11 nicm 99: if (ferror(f)) {
1.23 nicm 100: cmdq_error(cmdq, "%s: read error", path);
1.9 nicm 101: goto error;
1.1 nicm 102: }
1.11 nicm 103: if (pdata != NULL)
104: pdata[psize] = '\0';
1.1 nicm 105:
1.13 nicm 106: fclose(f);
1.1 nicm 107:
1.29 nicm 108: if (paste_set(pdata, psize, bufname, &cause) != 0) {
109: cmdq_error(cmdq, "%s", cause);
1.21 nicm 110: free(pdata);
1.29 nicm 111: free(cause);
1.22 nicm 112: return (CMD_RETURN_ERROR);
1.1 nicm 113: }
114:
1.22 nicm 115: return (CMD_RETURN_NORMAL);
1.9 nicm 116:
117: error:
1.21 nicm 118: free(pdata);
1.13 nicm 119: if (f != NULL)
120: fclose(f);
1.22 nicm 121: return (CMD_RETURN_ERROR);
1.13 nicm 122: }
123:
124: void
1.20 nicm 125: cmd_load_buffer_callback(struct client *c, int closed, void *data)
1.13 nicm 126: {
1.29 nicm 127: const char *bufname = data;
128: char *pdata, *cause;
129: size_t psize;
1.13 nicm 130:
1.20 nicm 131: if (!closed)
132: return;
133: c->stdin_callback = NULL;
134:
135: c->references--;
1.23 nicm 136: if (c->flags & CLIENT_DEAD)
137: return;
1.13 nicm 138:
1.20 nicm 139: psize = EVBUFFER_LENGTH(c->stdin_data);
1.29 nicm 140: if (psize == 0 || (pdata = malloc(psize + 1)) == NULL)
1.23 nicm 141: goto out;
1.29 nicm 142:
1.20 nicm 143: memcpy(pdata, EVBUFFER_DATA(c->stdin_data), psize);
1.13 nicm 144: pdata[psize] = '\0';
1.20 nicm 145: evbuffer_drain(c->stdin_data, psize);
1.13 nicm 146:
1.29 nicm 147: if (paste_set(pdata, psize, bufname, &cause) != 0) {
1.13 nicm 148: /* No context so can't use server_client_msg_error. */
1.29 nicm 149: evbuffer_add_printf(c->stderr_data, "%s", cause);
1.20 nicm 150: server_push_stderr(c);
1.27 nicm 151: free(pdata);
1.29 nicm 152: free(cause);
1.13 nicm 153: }
1.23 nicm 154:
155: out:
156: cmdq_continue(c->cmdq);
1.1 nicm 157: }
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