Annotation of src/usr.bin/tmux/cmd-save-buffer.c, Revision 1.23
1.23 ! nicm 1: /* $OpenBSD: cmd-save-buffer.c,v 1.22 2014/04/07 10:32:16 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: NULL,
43: cmd_save_buffer_exec
1.1 nicm 44: };
45:
1.18 nicm 46: const struct cmd_entry cmd_show_buffer_entry = {
47: "show-buffer", "showb",
48: "b:", 0, 0,
49: CMD_BUFFER_USAGE,
50: 0,
51: NULL,
52: cmd_save_buffer_exec
53: };
54:
1.16 nicm 55: enum cmd_retval
1.19 nicm 56: cmd_save_buffer_exec(struct cmd *self, struct cmd_q *cmdq)
1.1 nicm 57: {
1.10 nicm 58: struct args *args = self->args;
1.21 nicm 59: struct client *c = cmdq->client;
1.12 nicm 60: struct session *s;
1.1 nicm 61: struct paste_buffer *pb;
1.21 nicm 62: const char *path;
63: char *cause, *start, *end, *msg;
64: size_t size, used, msglen;
65: int cwd, fd, buffer;
1.8 nicm 66: FILE *f;
1.1 nicm 67:
1.10 nicm 68: if (!args_has(args, 'b')) {
1.9 nicm 69: if ((pb = paste_get_top(&global_buffers)) == NULL) {
1.19 nicm 70: cmdq_error(cmdq, "no buffers");
1.16 nicm 71: return (CMD_RETURN_ERROR);
1.1 nicm 72: }
73: } else {
1.10 nicm 74: buffer = args_strtonum(args, 'b', 0, INT_MAX, &cause);
75: if (cause != NULL) {
1.19 nicm 76: cmdq_error(cmdq, "buffer %s", cause);
1.15 nicm 77: free(cause);
1.16 nicm 78: return (CMD_RETURN_ERROR);
1.10 nicm 79: }
80:
81: pb = paste_get_index(&global_buffers, buffer);
1.9 nicm 82: if (pb == NULL) {
1.19 nicm 83: cmdq_error(cmdq, "no buffer %d", buffer);
1.16 nicm 84: return (CMD_RETURN_ERROR);
1.1 nicm 85: }
86: }
87:
1.18 nicm 88: if (self->entry == &cmd_show_buffer_entry)
89: path = "-";
90: else
91: path = args->argv[0];
1.10 nicm 92: if (strcmp(path, "-") == 0) {
1.19 nicm 93: if (c == NULL) {
94: cmdq_error(cmdq, "can't write to stdout");
95: return (CMD_RETURN_ERROR);
96: }
97: if (c->session == NULL || (c->flags & CLIENT_CONTROL))
1.18 nicm 98: goto do_stdout;
1.19 nicm 99: goto do_print;
1.18 nicm 100: }
101:
1.21 nicm 102: if (c != NULL && c->session == NULL)
103: cwd = c->cwd;
104: else if ((s = cmd_current_session(cmdq, 0)) != NULL)
105: cwd = s->cwd;
106: else
107: cwd = AT_FDCWD;
108:
109: f = NULL;
110: if (args_has(self->args, 'a')) {
111: fd = openat(cwd, path, O_CREAT|O_RDWR|O_APPEND, 0600);
112: if (fd != -1)
113: f = fdopen(fd, "ab");
114: } else {
1.22 nicm 115: fd = openat(cwd, path, O_CREAT|O_RDWR|O_TRUNC, 0600);
1.21 nicm 116: if (fd != -1)
117: f = fdopen(fd, "wb");
1.18 nicm 118: }
119: if (f == NULL) {
1.21 nicm 120: if (fd != -1)
121: close(fd);
1.19 nicm 122: cmdq_error(cmdq, "%s: %s", path, strerror(errno));
1.18 nicm 123: return (CMD_RETURN_ERROR);
124: }
125: if (fwrite(pb->data, 1, pb->size, f) != pb->size) {
1.19 nicm 126: cmdq_error(cmdq, "%s: fwrite error", path);
1.18 nicm 127: fclose(f);
128: return (CMD_RETURN_ERROR);
129: }
130: fclose(f);
131:
132: return (CMD_RETURN_NORMAL);
133:
134: do_stdout:
135: evbuffer_add(c->stdout_data, pb->data, pb->size);
136: server_push_stdout(c);
137: return (CMD_RETURN_NORMAL);
138:
139: do_print:
140: if (pb->size > (INT_MAX / 4) - 1) {
1.19 nicm 141: cmdq_error(cmdq, "buffer too big");
1.18 nicm 142: return (CMD_RETURN_ERROR);
143: }
144: msg = NULL;
1.12 nicm 145:
1.18 nicm 146: used = 0;
147: while (used != pb->size) {
148: start = pb->data + used;
149: end = memchr(start, '\n', pb->size - used);
150: if (end != NULL)
151: size = end - start;
1.7 nicm 152: else
1.18 nicm 153: size = pb->size - used;
154:
155: msglen = size * 4 + 1;
156: msg = xrealloc(msg, 1, msglen);
157:
158: strvisx(msg, start, size, VIS_OCTAL|VIS_TAB);
1.19 nicm 159: cmdq_print(cmdq, "%s", msg);
1.18 nicm 160:
161: used += size + (end != NULL);
1.1 nicm 162: }
163:
1.18 nicm 164: free(msg);
1.16 nicm 165: return (CMD_RETURN_NORMAL);
1.1 nicm 166: }
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