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Add pwm-clip utility for setting the X11 CLIPBOARD selection
author Guido Berhoerster <guido+pwm@berhoerster.name>
date Thu, 21 Sep 2017 09:45:59 +0200
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25:616385fa1fd9 26:5bdea77d0c1d
1 /*
2 * Copyright (C) 2017 Guido Berhoerster <guido+pwm@berhoerster.name>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included
13 * in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 */
23
24 #include "compat.h"
25
26 #ifdef HAVE_ERR_H
27 #include <err.h>
28 #endif /* HAVE_ERR_H */
29 #include <errno.h>
30 #include <nettle/base64.h>
31 #include <string.h>
32 #include <stdlib.h>
33 #include <stdio.h>
34 #include <unistd.h>
35
36 #include "util.h"
37
38 #define CHUNK_SIZE 128
39
40 static char *
41 base64_encode(const unsigned char *src, size_t size)
42 {
43 char *dst = NULL;
44 struct base64_encode_ctx b64_ctx;
45 size_t len = 0;
46
47 dst = xmalloc(BASE64_ENCODE_LENGTH(size) +
48 BASE64_ENCODE_FINAL_LENGTH);
49
50 base64_encode_init(&b64_ctx);
51 len += base64_encode_update(&b64_ctx, (unsigned char *)dst, size, src);
52 len += base64_encode_final(&b64_ctx, (unsigned char *)dst);
53 dst[len] = '\0';
54
55 dst = xrealloc(dst, len + 1);
56
57 return (dst);
58 }
59
60 static void
61 set_clipboard(const char *s)
62 {
63 char *b64 = NULL;
64
65 b64 = base64_encode((const unsigned char *)s, strlen(s));
66 printf("\033]52;c;%s\a\n", b64);
67 free(b64);
68 }
69
70 static void
71 set_clipboard_dcs_tmux(const char *s)
72 {
73 char *b64 = NULL;
74
75 b64 = base64_encode((const unsigned char *)s, strlen(s));
76 printf("\033Ptmux;\033\033]52;c;%s\a\033\\", b64);
77 free(b64);
78 }
79
80 static void
81 set_clipboard_dcs_chunked(const char *s)
82 {
83 char *b64 = NULL;
84 size_t i;
85
86 b64 = base64_encode((const unsigned char *)s, strlen(s));
87
88 printf("\033P\033]52;c;");
89 for (i = 0; b64[i] != '\0'; i++) {
90 if ((i > 0) && (i % CHUNK_SIZE == 0)) {
91 printf("\033\\\033P");
92 }
93 putchar(b64[i]);
94 }
95 printf("\a\033\\");
96
97 free(b64);
98 }
99
100 static void
101 usage(void)
102 {
103 fprintf(stderr, "usage: %s\n", getprogname());
104 }
105
106 int
107 main(int argc, char *argv[])
108 {
109 int status = EXIT_FAILURE;
110 char *term;
111 void (*set_clipboard_func)(const char *);
112 int errflag = 0;
113 int c;
114 ssize_t len;
115 char *s = NULL;
116 size_t size = 0;
117
118 setprogname(argv[0]);
119
120 term = getenv("TERM");
121 if (term == NULL) {
122 fprintf(stderr, "error: unknown terminal\n");
123 goto out;
124 } else if (strncmp(term, "xterm", strlen("xterm")) == 0) {
125 set_clipboard_func = set_clipboard;
126 } else if (strncmp(term, "tmux", strlen("tmux")) == 0) {
127 set_clipboard_func = set_clipboard_dcs_tmux;
128 } else if (strncmp(term, "screen", strlen("screen")) == 0) {
129 if (getenv("TMUX") != NULL) {
130 set_clipboard_func = set_clipboard_dcs_tmux;
131 } else {
132 set_clipboard_func = set_clipboard_dcs_chunked;
133 }
134 } else {
135 fprintf(stderr, "terminal does not support setting "
136 "X11 CLIPBOARD selection\n");
137 goto out;
138 }
139
140 while (!errflag && (c = getopt(argc, argv, "h")) != -1) {
141 switch (c) {
142 case 'h':
143 usage();
144 exit(EXIT_SUCCESS);
145 default:
146 errflag = 1;
147 }
148 }
149 if (errflag || (optind + 1 < argc)) {
150 usage();
151 exit(EXIT_USAGE);
152 }
153
154 errno = 0;
155 len = getline(&s, &size, stdin);
156 if (len < 0) {
157 if (errno == 0) {
158 fprintf(stderr, "failed to read line\n");
159 goto out;
160 } else {
161 err(1, "getline");
162 }
163 }
164 if ((len > 0) && (s[len - 1] == '\n')) {
165 s[--len] = '\0';
166 }
167
168 set_clipboard_func(s);
169
170 status = EXIT_SUCCESS;
171
172 out:
173 free(s);
174
175 exit(status);
176 }