mirror of
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216 lines
4.5 KiB
C
216 lines
4.5 KiB
C
/* $Id: cfg.c,v 1.5 2008-06-02 21:36:51 nicm Exp $ */
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/*
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* Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include "tmux.h"
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/*
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* Config file parser. Pretty quick and simple, each line is parsed into a
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* argv array and executed as a command.
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*/
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char *cfg_string(FILE *, char, int);
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void printflike2 cfg_print(struct cmd_ctx *, const char *, ...);
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void printflike2 cfg_error(struct cmd_ctx *, const char *, ...);
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char *cfg_cause;
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void printflike2
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cfg_print(unused struct cmd_ctx *ctx, unused const char *fmt, ...)
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{
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}
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void printflike2
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cfg_error(unused struct cmd_ctx *ctx, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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xvasprintf(&cfg_cause, fmt, ap);
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va_end(ap);
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}
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int
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load_cfg(const char *path, char **causep)
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{
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FILE *f;
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int ch, argc;
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u_int line;
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char **argv, *buf, *s, *cause;
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size_t len;
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struct cmd *cmd;
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struct cmd_ctx ctx;
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if ((f = fopen(path, "rb")) == NULL) {
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xasprintf(causep, "%s: %s", path, strerror(errno));
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return (1);
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}
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cause = NULL;
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argv = NULL;
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argc = 0;
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buf = NULL;
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len = 0;
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line = 0;
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while ((ch = getc(f)) != EOF) {
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switch (ch) {
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case '#':
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/* Comment: discard until EOL. */
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while ((ch = getc(f)) != '\n' && ch != EOF)
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;
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line++;
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break;
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case '\'':
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if ((s = cfg_string(f, '\'', 0)) == NULL)
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goto error;
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argv = xrealloc(argv, argc + 1, sizeof (char *));
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argv[argc++] = s;
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break;
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case '"':
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if ((s = cfg_string(f, '"', 1)) == NULL)
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goto error;
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argv = xrealloc(argv, argc + 1, sizeof (char *));
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argv[argc++] = s;
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break;
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case '\n':
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case EOF:
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case ' ':
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case '\t':
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if (len != 0) {
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buf[len] = '\0';
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argv = xrealloc(
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argv, argc + 1, sizeof (char *));
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argv[argc++] = buf;
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buf = NULL;
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len = 0;
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}
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if ((ch != '\n' && ch != EOF) || argc == 0)
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break;
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line++;
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if ((cmd = cmd_parse(argc, argv, &cause)) == NULL)
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goto error;
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ctx.msgdata = NULL;
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ctx.cursession = NULL;
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ctx.curclient = NULL;
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ctx.error = cfg_error;
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ctx.print = cfg_print;
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ctx.cmdclient = NULL;
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ctx.flags = 0;
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cfg_cause = NULL;
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cmd_exec(cmd, &ctx);
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cmd_free(cmd);
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if (cfg_cause != NULL) {
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cause = cfg_cause;
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goto error;
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}
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while (--argc >= 0)
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xfree(argv[argc]);
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argc = 0;
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break;
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default:
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if (len >= SIZE_MAX - 2)
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goto error;
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buf = xrealloc(buf, 1, len + 1);
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buf[len++] = ch;
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break;
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}
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}
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fclose(f);
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return (0);
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error:
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while (--argc >= 0)
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xfree(argv[argc]);
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xfree(argv);
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if (buf != NULL)
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xfree(buf);
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if (cause == NULL)
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xasprintf(causep, "%s: error at line %u", path, line);
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else
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xasprintf(causep, "%s: %s at line %u", path, cause, line);
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return (1);
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}
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char *
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cfg_string(FILE *f, char endch, int esc)
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{
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int ch;
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char *buf;
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size_t len;
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buf = NULL;
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len = 0;
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while ((ch = getc(f)) != endch) {
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switch (ch) {
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case EOF:
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xfree(buf);
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return (NULL);
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case '\\':
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if (!esc)
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break;
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switch (ch = getc(f)) {
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case EOF:
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xfree(buf);
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return (NULL);
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case 'r':
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ch = '\r';
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break;
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case 'n':
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ch = '\n';
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break;
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case 't':
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ch = '\t';
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break;
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}
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break;
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}
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if (len >= SIZE_MAX - 2) {
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xfree(buf);
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return (NULL);
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}
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buf = xrealloc(buf, 1, len + 1);
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buf[len++] = ch;
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}
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buf[len] = '\0';
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return (buf);
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}
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