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/* $OpenBSD: cfg.c,v 1.16 2012/07/11 07:10:15 nicm Exp $ */
/*
* Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "tmux.h"
/*
* Config file parser. Pretty quick and simple, each line is parsed into a
* argv array and executed as a command.
*/
void printflike2 cfg_print(struct cmd_ctx *, const char *, ...);
void printflike2 cfg_error(struct cmd_ctx *, const char *, ...);
char *cfg_cause;
int cfg_finished;
struct causelist cfg_causes = ARRAY_INITIALIZER;
/* ARGSUSED */
void printflike2
cfg_print(unused struct cmd_ctx *ctx, unused const char *fmt, ...)
{
}
/* ARGSUSED */
void printflike2
cfg_error(unused struct cmd_ctx *ctx, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
xvasprintf(&cfg_cause, fmt, ap);
va_end(ap);
}
void printflike2
cfg_add_cause(struct causelist *causes, const char *fmt, ...)
{
char *cause;
va_list ap;
va_start(ap, fmt);
xvasprintf(&cause, fmt, ap);
va_end(ap);
ARRAY_ADD(causes, cause);
}
/*
* Load configuration file. Returns -1 for an error with a list of messages in
* causes. Note that causes must be initialised by the caller!
*/
int
load_cfg(const char *path, struct cmd_ctx *ctxin, struct causelist *causes)
{
FILE *f;
u_int n;
char *buf, *line, *cause;
size_t len;
struct cmd_list *cmdlist;
struct cmd_ctx ctx;
enum cmd_retval retval;
if ((f = fopen(path, "rb")) == NULL) {
cfg_add_cause(causes, "%s: %s", path, strerror(errno));
return (-1);
}
n = 0;
line = NULL;
retval = CMD_RETURN_NORMAL;
while ((buf = fgetln(f, &len))) {
if (buf[len - 1] == '\n')
len--;
if (line != NULL)
line = xrealloc(line, 1, strlen(line) + len + 1);
else {
line = xmalloc(len + 1);
*line = '\0';
}
/* Append buffer to line. strncat will terminate. */
strncat(line, buf, len);
n++;
/* Continuation: get next line? */
len = strlen(line);
if (len > 0 && line[len - 1] == '\\') {
line[len - 1] = '\0';
/* Ignore escaped backslash at EOL. */
if (len > 1 && line[len - 2] != '\\')
continue;
}
buf = line;
line = NULL;
if (cmd_string_parse(buf, &cmdlist, &cause) != 0) {
free(buf);
if (cause == NULL)
continue;
cfg_add_cause(causes, "%s: %u: %s", path, n, cause);
free(cause);
continue;
} else
free(buf);
if (cmdlist == NULL)
continue;
cfg_cause = NULL;
if (ctxin == NULL) {
ctx.msgdata = NULL;
ctx.curclient = NULL;
ctx.cmdclient = NULL;
} else {
ctx.msgdata = ctxin->msgdata;
ctx.curclient = ctxin->curclient;
ctx.cmdclient = ctxin->cmdclient;
}
ctx.error = cfg_error;
ctx.print = cfg_print;
ctx.info = cfg_print;
cfg_cause = NULL;
switch (cmd_list_exec(cmdlist, &ctx)) {
case CMD_RETURN_YIELD:
if (retval != CMD_RETURN_ATTACH)
retval = CMD_RETURN_YIELD;
break;
case CMD_RETURN_ATTACH:
retval = CMD_RETURN_ATTACH;
break;
case CMD_RETURN_ERROR:
case CMD_RETURN_NORMAL:
break;
}
cmd_list_free(cmdlist);
if (cfg_cause != NULL) {
cfg_add_cause(
causes, "%s: %d: %s", path, n, cfg_cause);
free(cfg_cause);
}
}
if (line != NULL) {
cfg_add_cause(causes,
"%s: %d: line continuation at end of file", path, n);
free(line);
}
fclose(f);
return (retval);
}
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