Annotation of src/usr.bin/tmux/cmd-save-buffer.c, Revision 1.20
1.20 ! nicm 1: /* $OpenBSD: cmd-save-buffer.c,v 1.19 2013/03/24 09:54:10 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>
1.15 nicm 23: #include <stdlib.h>
1.1 nicm 24: #include <string.h>
1.18 nicm 25: #include <vis.h>
1.1 nicm 26:
27: #include "tmux.h"
28:
29: /*
1.11 nicm 30: * Saves a paste buffer to a file.
1.1 nicm 31: */
32:
1.19 nicm 33: enum cmd_retval cmd_save_buffer_exec(struct cmd *, struct cmd_q *);
1.1 nicm 34:
35: const struct cmd_entry cmd_save_buffer_entry = {
36: "save-buffer", "saveb",
1.10 nicm 37: "ab:", 1, 1,
1.13 nicm 38: "[-a] " CMD_BUFFER_USAGE " path",
1.10 nicm 39: 0,
40: NULL,
41: cmd_save_buffer_exec
1.1 nicm 42: };
43:
1.18 nicm 44: const struct cmd_entry cmd_show_buffer_entry = {
45: "show-buffer", "showb",
46: "b:", 0, 0,
47: CMD_BUFFER_USAGE,
48: 0,
49: NULL,
50: cmd_save_buffer_exec
51: };
52:
1.16 nicm 53: enum cmd_retval
1.19 nicm 54: cmd_save_buffer_exec(struct cmd *self, struct cmd_q *cmdq)
1.1 nicm 55: {
1.10 nicm 56: struct args *args = self->args;
1.17 nicm 57: struct client *c;
1.12 nicm 58: struct session *s;
1.1 nicm 59: struct paste_buffer *pb;
1.12 nicm 60: const char *path, *newpath, *wd;
1.18 nicm 61: char *cause, *start, *end;
62: size_t size, used;
1.10 nicm 63: int buffer;
1.8 nicm 64: mode_t mask;
65: FILE *f;
1.18 nicm 66: char *msg;
67: size_t msglen;
1.1 nicm 68:
1.10 nicm 69: if (!args_has(args, 'b')) {
1.9 nicm 70: if ((pb = paste_get_top(&global_buffers)) == NULL) {
1.19 nicm 71: cmdq_error(cmdq, "no buffers");
1.16 nicm 72: return (CMD_RETURN_ERROR);
1.1 nicm 73: }
74: } else {
1.10 nicm 75: buffer = args_strtonum(args, 'b', 0, INT_MAX, &cause);
76: if (cause != NULL) {
1.19 nicm 77: cmdq_error(cmdq, "buffer %s", cause);
1.15 nicm 78: free(cause);
1.16 nicm 79: return (CMD_RETURN_ERROR);
1.10 nicm 80: }
81:
82: pb = paste_get_index(&global_buffers, buffer);
1.9 nicm 83: if (pb == NULL) {
1.19 nicm 84: cmdq_error(cmdq, "no buffer %d", buffer);
1.16 nicm 85: return (CMD_RETURN_ERROR);
1.1 nicm 86: }
87: }
88:
1.18 nicm 89: if (self->entry == &cmd_show_buffer_entry)
90: path = "-";
91: else
92: path = args->argv[0];
1.10 nicm 93: if (strcmp(path, "-") == 0) {
1.19 nicm 94: c = cmdq->client;
95: if (c == NULL) {
96: cmdq_error(cmdq, "can't write to stdout");
97: return (CMD_RETURN_ERROR);
98: }
99: if (c->session == NULL || (c->flags & CLIENT_CONTROL))
1.18 nicm 100: goto do_stdout;
1.19 nicm 101: goto do_print;
1.18 nicm 102: }
103:
1.19 nicm 104: c = cmdq->client;
1.18 nicm 105: if (c != NULL)
106: wd = c->cwd;
1.19 nicm 107: else if ((s = cmd_current_session(cmdq, 0)) != NULL) {
1.18 nicm 108: wd = options_get_string(&s->options, "default-path");
109: if (*wd == '\0')
110: wd = s->cwd;
111: } else
112: wd = NULL;
113: if (wd != NULL && *wd != '\0') {
114: newpath = get_full_path(wd, path);
115: if (newpath != NULL)
116: path = newpath;
117: }
118:
119: mask = umask(S_IRWXG | S_IRWXO);
120: if (args_has(self->args, 'a'))
121: f = fopen(path, "ab");
122: else
123: f = fopen(path, "wb");
124: umask(mask);
125: if (f == NULL) {
1.19 nicm 126: cmdq_error(cmdq, "%s: %s", path, strerror(errno));
1.18 nicm 127: return (CMD_RETURN_ERROR);
128: }
129: if (fwrite(pb->data, 1, pb->size, f) != pb->size) {
1.19 nicm 130: cmdq_error(cmdq, "%s: fwrite error", path);
1.18 nicm 131: fclose(f);
132: return (CMD_RETURN_ERROR);
133: }
134: fclose(f);
135:
136: return (CMD_RETURN_NORMAL);
137:
138: do_stdout:
139: evbuffer_add(c->stdout_data, pb->data, pb->size);
140: server_push_stdout(c);
141: return (CMD_RETURN_NORMAL);
142:
143: do_print:
144: if (pb->size > (INT_MAX / 4) - 1) {
1.19 nicm 145: cmdq_error(cmdq, "buffer too big");
1.18 nicm 146: return (CMD_RETURN_ERROR);
147: }
148: msg = NULL;
149: msglen = 0;
1.12 nicm 150:
1.18 nicm 151: used = 0;
152: while (used != pb->size) {
153: start = pb->data + used;
154: end = memchr(start, '\n', pb->size - used);
155: if (end != NULL)
156: size = end - start;
1.7 nicm 157: else
1.18 nicm 158: size = pb->size - used;
159:
160: msglen = size * 4 + 1;
161: msg = xrealloc(msg, 1, msglen);
162:
163: strvisx(msg, start, size, VIS_OCTAL|VIS_TAB);
1.19 nicm 164: cmdq_print(cmdq, "%s", msg);
1.18 nicm 165:
166: used += size + (end != NULL);
1.1 nicm 167: }
168:
1.18 nicm 169: free(msg);
1.16 nicm 170: return (CMD_RETURN_NORMAL);
1.1 nicm 171: }