Annotation of src/usr.bin/tmux/cmd-save-buffer.c, Revision 1.42
1.42 ! nicm 1: /* $OpenBSD: cmd-save-buffer.c,v 1.41 2017/01/06 13:26:09 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:
19: #include <sys/types.h>
20: #include <sys/stat.h>
21:
22: #include <errno.h>
1.21 nicm 23: #include <fcntl.h>
1.15 nicm 24: #include <stdlib.h>
1.1 nicm 25: #include <string.h>
1.21 nicm 26: #include <unistd.h>
1.18 nicm 27: #include <vis.h>
1.1 nicm 28:
29: #include "tmux.h"
30:
31: /*
1.11 nicm 32: * Saves a paste buffer to a file.
1.1 nicm 33: */
34:
1.40 nicm 35: static enum cmd_retval cmd_save_buffer_exec(struct cmd *, struct cmdq_item *);
1.1 nicm 36:
37: const struct cmd_entry cmd_save_buffer_entry = {
1.36 nicm 38: .name = "save-buffer",
39: .alias = "saveb",
40:
41: .args = { "ab:", 1, 1 },
42: .usage = "[-a] " CMD_BUFFER_USAGE " path",
43:
1.39 nicm 44: .flags = CMD_AFTERHOOK,
1.36 nicm 45: .exec = cmd_save_buffer_exec
1.1 nicm 46: };
47:
1.18 nicm 48: const struct cmd_entry cmd_show_buffer_entry = {
1.36 nicm 49: .name = "show-buffer",
50: .alias = "showb",
51:
52: .args = { "b:", 0, 0 },
53: .usage = CMD_BUFFER_USAGE,
54:
1.39 nicm 55: .flags = CMD_AFTERHOOK,
1.36 nicm 56: .exec = cmd_save_buffer_exec
1.18 nicm 57: };
58:
1.38 nicm 59: static enum cmd_retval
1.40 nicm 60: cmd_save_buffer_exec(struct cmd *self, struct cmdq_item *item)
1.1 nicm 61: {
1.10 nicm 62: struct args *args = self->args;
1.40 nicm 63: struct client *c = item->client;
1.1 nicm 64: struct paste_buffer *pb;
1.42 ! nicm 65: const char *path, *bufname, *bufdata, *start, *end;
1.31 nicm 66: const char *flags;
1.42 ! nicm 67: char *msg, *file;
1.29 nicm 68: size_t size, used, msglen, bufsize;
1.8 nicm 69: FILE *f;
1.1 nicm 70:
1.10 nicm 71: if (!args_has(args, 'b')) {
1.29 nicm 72: if ((pb = paste_get_top(NULL)) == NULL) {
1.40 nicm 73: cmdq_error(item, "no buffers");
1.16 nicm 74: return (CMD_RETURN_ERROR);
1.1 nicm 75: }
76: } else {
1.25 nicm 77: bufname = args_get(args, 'b');
78: pb = paste_get_name(bufname);
1.9 nicm 79: if (pb == NULL) {
1.40 nicm 80: cmdq_error(item, "no buffer %s", bufname);
1.16 nicm 81: return (CMD_RETURN_ERROR);
1.1 nicm 82: }
83: }
1.29 nicm 84: bufdata = paste_buffer_data(pb, &bufsize);
1.1 nicm 85:
1.18 nicm 86: if (self->entry == &cmd_show_buffer_entry)
87: path = "-";
88: else
89: path = args->argv[0];
1.10 nicm 90: if (strcmp(path, "-") == 0) {
1.19 nicm 91: if (c == NULL) {
1.40 nicm 92: cmdq_error(item, "can't write to stdout");
1.19 nicm 93: return (CMD_RETURN_ERROR);
94: }
95: if (c->session == NULL || (c->flags & CLIENT_CONTROL))
1.18 nicm 96: goto do_stdout;
1.19 nicm 97: goto do_print;
1.18 nicm 98: }
99:
1.31 nicm 100: flags = "wb";
101: if (args_has(self->args, 'a'))
102: flags = "ab";
103:
1.42 ! nicm 104: file = server_client_get_path(c, path);
! 105: f = fopen(file, flags);
1.18 nicm 106: if (f == NULL) {
1.42 ! nicm 107: cmdq_error(item, "%s: %s", file, strerror(errno));
! 108: free(file);
1.18 nicm 109: return (CMD_RETURN_ERROR);
110: }
1.31 nicm 111:
1.29 nicm 112: if (fwrite(bufdata, 1, bufsize, f) != bufsize) {
1.42 ! nicm 113: cmdq_error(item, "%s: write error", file);
1.18 nicm 114: fclose(f);
115: return (CMD_RETURN_ERROR);
116: }
1.42 ! nicm 117:
1.18 nicm 118: fclose(f);
1.42 ! nicm 119: free(file);
1.18 nicm 120:
121: return (CMD_RETURN_NORMAL);
122:
123: do_stdout:
1.29 nicm 124: evbuffer_add(c->stdout_data, bufdata, bufsize);
1.34 nicm 125: server_client_push_stdout(c);
1.18 nicm 126: return (CMD_RETURN_NORMAL);
127:
128: do_print:
1.29 nicm 129: if (bufsize > (INT_MAX / 4) - 1) {
1.40 nicm 130: cmdq_error(item, "buffer too big");
1.18 nicm 131: return (CMD_RETURN_ERROR);
132: }
133: msg = NULL;
1.12 nicm 134:
1.18 nicm 135: used = 0;
1.29 nicm 136: while (used != bufsize) {
137: start = bufdata + used;
138: end = memchr(start, '\n', bufsize - used);
1.18 nicm 139: if (end != NULL)
140: size = end - start;
1.7 nicm 141: else
1.29 nicm 142: size = bufsize - used;
1.18 nicm 143:
144: msglen = size * 4 + 1;
1.26 nicm 145: msg = xrealloc(msg, msglen);
1.18 nicm 146:
147: strvisx(msg, start, size, VIS_OCTAL|VIS_TAB);
1.40 nicm 148: cmdq_print(item, "%s", msg);
1.18 nicm 149:
150: used += size + (end != NULL);
1.1 nicm 151: }
152:
1.18 nicm 153: free(msg);
1.16 nicm 154: return (CMD_RETURN_NORMAL);
1.1 nicm 155: }
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