Annotation of src/usr.bin/tmux/cmd-save-buffer.c, Revision 1.28
1.28 ! nicm 1: /* $OpenBSD: cmd-save-buffer.c,v 1.27 2014/10/20 22:29:25 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;
1.25 nicm 60: const char *path, *bufname;
61: char *start, *end, *msg;
1.21 nicm 62: size_t size, used, msglen;
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')) {
1.24 nicm 67: if ((pb = paste_get_top()) == 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: }
79:
1.18 nicm 80: if (self->entry == &cmd_show_buffer_entry)
81: path = "-";
82: else
83: path = args->argv[0];
1.10 nicm 84: if (strcmp(path, "-") == 0) {
1.19 nicm 85: if (c == NULL) {
86: cmdq_error(cmdq, "can't write to stdout");
87: return (CMD_RETURN_ERROR);
88: }
89: if (c->session == NULL || (c->flags & CLIENT_CONTROL))
1.18 nicm 90: goto do_stdout;
1.19 nicm 91: goto do_print;
1.18 nicm 92: }
93:
1.21 nicm 94: if (c != NULL && c->session == NULL)
95: cwd = c->cwd;
1.28 ! nicm 96: else if ((s = cmd_find_current(cmdq)) != NULL)
1.21 nicm 97: cwd = s->cwd;
98: else
99: cwd = AT_FDCWD;
100:
101: f = NULL;
102: if (args_has(self->args, 'a')) {
103: fd = openat(cwd, path, O_CREAT|O_RDWR|O_APPEND, 0600);
104: if (fd != -1)
105: f = fdopen(fd, "ab");
106: } else {
1.22 nicm 107: fd = openat(cwd, path, O_CREAT|O_RDWR|O_TRUNC, 0600);
1.21 nicm 108: if (fd != -1)
109: f = fdopen(fd, "wb");
1.18 nicm 110: }
111: if (f == NULL) {
1.21 nicm 112: if (fd != -1)
113: close(fd);
1.19 nicm 114: cmdq_error(cmdq, "%s: %s", path, strerror(errno));
1.18 nicm 115: return (CMD_RETURN_ERROR);
116: }
117: if (fwrite(pb->data, 1, pb->size, f) != pb->size) {
1.19 nicm 118: cmdq_error(cmdq, "%s: fwrite error", path);
1.18 nicm 119: fclose(f);
120: return (CMD_RETURN_ERROR);
121: }
122: fclose(f);
123:
124: return (CMD_RETURN_NORMAL);
125:
126: do_stdout:
127: evbuffer_add(c->stdout_data, pb->data, pb->size);
128: server_push_stdout(c);
129: return (CMD_RETURN_NORMAL);
130:
131: do_print:
132: if (pb->size > (INT_MAX / 4) - 1) {
1.19 nicm 133: cmdq_error(cmdq, "buffer too big");
1.18 nicm 134: return (CMD_RETURN_ERROR);
135: }
136: msg = NULL;
1.12 nicm 137:
1.18 nicm 138: used = 0;
139: while (used != pb->size) {
140: start = pb->data + used;
141: end = memchr(start, '\n', pb->size - used);
142: if (end != NULL)
143: size = end - start;
1.7 nicm 144: else
1.18 nicm 145: size = pb->size - used;
146:
147: msglen = size * 4 + 1;
1.26 nicm 148: msg = xrealloc(msg, msglen);
1.18 nicm 149:
150: strvisx(msg, start, size, VIS_OCTAL|VIS_TAB);
1.19 nicm 151: cmdq_print(cmdq, "%s", msg);
1.18 nicm 152:
153: used += size + (end != NULL);
1.1 nicm 154: }
155:
1.18 nicm 156: free(msg);
1.16 nicm 157: return (CMD_RETURN_NORMAL);
1.1 nicm 158: }
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