Annotation of src/usr.bin/tmux/cmd-save-buffer.c, Revision 1.29
1.29 ! nicm 1: /* $OpenBSD: cmd-save-buffer.c,v 1.28 2015/04/27 16:25:57 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:
1.19 nicm 35: enum cmd_retval cmd_save_buffer_exec(struct cmd *, struct cmd_q *);
1.1 nicm 36:
37: const struct cmd_entry cmd_save_buffer_entry = {
38: "save-buffer", "saveb",
1.10 nicm 39: "ab:", 1, 1,
1.13 nicm 40: "[-a] " CMD_BUFFER_USAGE " path",
1.10 nicm 41: 0,
42: cmd_save_buffer_exec
1.1 nicm 43: };
44:
1.18 nicm 45: const struct cmd_entry cmd_show_buffer_entry = {
46: "show-buffer", "showb",
47: "b:", 0, 0,
48: CMD_BUFFER_USAGE,
49: 0,
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;
1.21 nicm 57: struct client *c = cmdq->client;
1.12 nicm 58: struct session *s;
1.1 nicm 59: struct paste_buffer *pb;
1.29 ! nicm 60: const char *path, *bufname, *bufdata;
1.25 nicm 61: char *start, *end, *msg;
1.29 ! nicm 62: size_t size, used, msglen, bufsize;
1.25 nicm 63: int cwd, fd;
1.8 nicm 64: FILE *f;
1.1 nicm 65:
1.10 nicm 66: if (!args_has(args, 'b')) {
1.29 ! nicm 67: if ((pb = paste_get_top(NULL)) == NULL) {
1.19 nicm 68: cmdq_error(cmdq, "no buffers");
1.16 nicm 69: return (CMD_RETURN_ERROR);
1.1 nicm 70: }
71: } else {
1.25 nicm 72: bufname = args_get(args, 'b');
73: pb = paste_get_name(bufname);
1.9 nicm 74: if (pb == NULL) {
1.25 nicm 75: cmdq_error(cmdq, "no buffer %s", bufname);
1.16 nicm 76: return (CMD_RETURN_ERROR);
1.1 nicm 77: }
78: }
1.29 ! nicm 79: bufdata = paste_buffer_data(pb, &bufsize);
1.1 nicm 80:
1.18 nicm 81: if (self->entry == &cmd_show_buffer_entry)
82: path = "-";
83: else
84: path = args->argv[0];
1.10 nicm 85: if (strcmp(path, "-") == 0) {
1.19 nicm 86: if (c == NULL) {
87: cmdq_error(cmdq, "can't write to stdout");
88: return (CMD_RETURN_ERROR);
89: }
90: if (c->session == NULL || (c->flags & CLIENT_CONTROL))
1.18 nicm 91: goto do_stdout;
1.19 nicm 92: goto do_print;
1.18 nicm 93: }
94:
1.21 nicm 95: if (c != NULL && c->session == NULL)
96: cwd = c->cwd;
1.28 nicm 97: else if ((s = cmd_find_current(cmdq)) != NULL)
1.21 nicm 98: cwd = s->cwd;
99: else
100: cwd = AT_FDCWD;
101:
102: f = NULL;
103: if (args_has(self->args, 'a')) {
104: fd = openat(cwd, path, O_CREAT|O_RDWR|O_APPEND, 0600);
105: if (fd != -1)
106: f = fdopen(fd, "ab");
107: } else {
1.22 nicm 108: fd = openat(cwd, path, O_CREAT|O_RDWR|O_TRUNC, 0600);
1.21 nicm 109: if (fd != -1)
110: f = fdopen(fd, "wb");
1.18 nicm 111: }
112: if (f == NULL) {
1.21 nicm 113: if (fd != -1)
114: close(fd);
1.19 nicm 115: cmdq_error(cmdq, "%s: %s", path, strerror(errno));
1.18 nicm 116: return (CMD_RETURN_ERROR);
117: }
1.29 ! nicm 118: if (fwrite(bufdata, 1, bufsize, f) != bufsize) {
1.19 nicm 119: cmdq_error(cmdq, "%s: fwrite error", path);
1.18 nicm 120: fclose(f);
121: return (CMD_RETURN_ERROR);
122: }
123: fclose(f);
124:
125: return (CMD_RETURN_NORMAL);
126:
127: do_stdout:
1.29 ! nicm 128: evbuffer_add(c->stdout_data, bufdata, bufsize);
1.18 nicm 129: server_push_stdout(c);
130: return (CMD_RETURN_NORMAL);
131:
132: do_print:
1.29 ! nicm 133: if (bufsize > (INT_MAX / 4) - 1) {
1.19 nicm 134: cmdq_error(cmdq, "buffer too big");
1.18 nicm 135: return (CMD_RETURN_ERROR);
136: }
137: msg = NULL;
1.12 nicm 138:
1.18 nicm 139: used = 0;
1.29 ! nicm 140: while (used != bufsize) {
! 141: start = bufdata + used;
! 142: end = memchr(start, '\n', bufsize - used);
1.18 nicm 143: if (end != NULL)
144: size = end - start;
1.7 nicm 145: else
1.29 ! nicm 146: size = bufsize - used;
1.18 nicm 147:
148: msglen = size * 4 + 1;
1.26 nicm 149: msg = xrealloc(msg, msglen);
1.18 nicm 150:
151: strvisx(msg, start, size, VIS_OCTAL|VIS_TAB);
1.19 nicm 152: cmdq_print(cmdq, "%s", msg);
1.18 nicm 153:
154: used += size + (end != NULL);
1.1 nicm 155: }
156:
1.18 nicm 157: free(msg);
1.16 nicm 158: return (CMD_RETURN_NORMAL);
1.1 nicm 159: }
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