Annotation of src/usr.bin/tmux/cmd-save-buffer.c, Revision 1.36
1.36 ! nicm 1: /* $OpenBSD: cmd-save-buffer.c,v 1.35 2015/12/13 14:32:38 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 = {
1.36 ! nicm 38: .name = "save-buffer",
! 39: .alias = "saveb",
! 40:
! 41: .args = { "ab:", 1, 1 },
! 42: .usage = "[-a] " CMD_BUFFER_USAGE " path",
! 43:
! 44: .flags = 0,
! 45: .exec = cmd_save_buffer_exec
1.1 nicm 46: };
47:
1.18 nicm 48: const struct cmd_entry cmd_show_buffer_entry = {
1.36 ! nicm 49: .name = "show-buffer",
! 50: .alias = "showb",
! 51:
! 52: .args = { "b:", 0, 0 },
! 53: .usage = CMD_BUFFER_USAGE,
! 54:
! 55: .flags = 0,
! 56: .exec = cmd_save_buffer_exec
1.18 nicm 57: };
58:
1.16 nicm 59: enum cmd_retval
1.19 nicm 60: cmd_save_buffer_exec(struct cmd *self, struct cmd_q *cmdq)
1.1 nicm 61: {
1.10 nicm 62: struct args *args = self->args;
1.21 nicm 63: struct client *c = cmdq->client;
1.12 nicm 64: struct session *s;
1.1 nicm 65: struct paste_buffer *pb;
1.31 nicm 66: const char *path, *bufname, *bufdata, *start, *end, *cwd;
67: const char *flags;
68: char *msg, *file, resolved[PATH_MAX];
1.29 nicm 69: size_t size, used, msglen, bufsize;
1.8 nicm 70: FILE *f;
1.1 nicm 71:
1.10 nicm 72: if (!args_has(args, 'b')) {
1.29 nicm 73: if ((pb = paste_get_top(NULL)) == NULL) {
1.19 nicm 74: cmdq_error(cmdq, "no buffers");
1.16 nicm 75: return (CMD_RETURN_ERROR);
1.1 nicm 76: }
77: } else {
1.25 nicm 78: bufname = args_get(args, 'b');
79: pb = paste_get_name(bufname);
1.9 nicm 80: if (pb == NULL) {
1.25 nicm 81: cmdq_error(cmdq, "no buffer %s", bufname);
1.16 nicm 82: return (CMD_RETURN_ERROR);
1.1 nicm 83: }
84: }
1.29 nicm 85: bufdata = paste_buffer_data(pb, &bufsize);
1.1 nicm 86:
1.18 nicm 87: if (self->entry == &cmd_show_buffer_entry)
88: path = "-";
89: else
90: path = args->argv[0];
1.10 nicm 91: if (strcmp(path, "-") == 0) {
1.19 nicm 92: if (c == NULL) {
93: cmdq_error(cmdq, "can't write to stdout");
94: return (CMD_RETURN_ERROR);
95: }
96: if (c->session == NULL || (c->flags & CLIENT_CONTROL))
1.18 nicm 97: goto do_stdout;
1.19 nicm 98: goto do_print;
1.18 nicm 99: }
100:
1.21 nicm 101: if (c != NULL && c->session == NULL)
102: cwd = c->cwd;
1.35 nicm 103: else if ((s = c->session) != NULL)
1.21 nicm 104: cwd = s->cwd;
105: else
1.31 nicm 106: cwd = ".";
1.21 nicm 107:
1.31 nicm 108: flags = "wb";
109: if (args_has(self->args, 'a'))
110: flags = "ab";
111:
1.32 nicm 112: if (*path == '/')
113: file = xstrdup(path);
1.31 nicm 114: else
1.32 nicm 115: xasprintf(&file, "%s/%s", cwd, path);
1.33 nicm 116: if (realpath(file, resolved) == NULL &&
117: strlcpy(resolved, file, sizeof resolved) >= sizeof resolved) {
118: cmdq_error(cmdq, "%s: %s", file, strerror(ENAMETOOLONG));
1.32 nicm 119: return (CMD_RETURN_ERROR);
120: }
121: f = fopen(resolved, flags);
1.31 nicm 122: free(file);
1.18 nicm 123: if (f == NULL) {
1.31 nicm 124: cmdq_error(cmdq, "%s: %s", resolved, strerror(errno));
1.18 nicm 125: return (CMD_RETURN_ERROR);
126: }
1.31 nicm 127:
1.29 nicm 128: if (fwrite(bufdata, 1, bufsize, f) != bufsize) {
1.31 nicm 129: cmdq_error(cmdq, "%s: write error", resolved);
1.18 nicm 130: fclose(f);
131: return (CMD_RETURN_ERROR);
132: }
133: fclose(f);
134:
135: return (CMD_RETURN_NORMAL);
136:
137: do_stdout:
1.29 nicm 138: evbuffer_add(c->stdout_data, bufdata, bufsize);
1.34 nicm 139: server_client_push_stdout(c);
1.18 nicm 140: return (CMD_RETURN_NORMAL);
141:
142: do_print:
1.29 nicm 143: if (bufsize > (INT_MAX / 4) - 1) {
1.19 nicm 144: cmdq_error(cmdq, "buffer too big");
1.18 nicm 145: return (CMD_RETURN_ERROR);
146: }
147: msg = NULL;
1.12 nicm 148:
1.18 nicm 149: used = 0;
1.29 nicm 150: while (used != bufsize) {
151: start = bufdata + used;
152: end = memchr(start, '\n', bufsize - used);
1.18 nicm 153: if (end != NULL)
154: size = end - start;
1.7 nicm 155: else
1.29 nicm 156: size = bufsize - used;
1.18 nicm 157:
158: msglen = size * 4 + 1;
1.26 nicm 159: msg = xrealloc(msg, msglen);
1.18 nicm 160:
161: strvisx(msg, start, size, VIS_OCTAL|VIS_TAB);
1.19 nicm 162: cmdq_print(cmdq, "%s", msg);
1.18 nicm 163:
164: used += size + (end != NULL);
1.1 nicm 165: }
166:
1.18 nicm 167: free(msg);
1.16 nicm 168: return (CMD_RETURN_NORMAL);
1.1 nicm 169: }
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