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stat(2) files before trying to load them to avoid problems, for example with "source-file /dev/zero".

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This commit dedicated to Tom: protecting idiots from their own stupidity for more than 20 years.
This commit is contained in:
Nicholas Marriott
2009-05-21 19:38:51 +00:00
parent eb6007102e
commit a8ec5f1d09
3 changed files with 23 additions and 3 deletions
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13
cfg.c
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@ -1,4 +1,4 @@
/* $Id: cfg.c,v 1.15 2009-03-31 22:23:43 nicm Exp $ */
/* $Id: cfg.c,v 1.16 2009-05-21 19:38:51 nicm Exp $ */
/*
* Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
@ -17,6 +17,7 @@
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <stdio.h>
@ -55,11 +56,21 @@ load_cfg(const char *path, char **cause)
{
FILE *f;
u_int n;
struct stat sb;
char *buf, *line, *ptr;
size_t len;
struct cmd_list *cmdlist;
struct cmd_ctx ctx;
if (stat(path, &sb) != 0) {
xasprintf(cause, "%s: %s", path, strerror(errno));
return (-1);
}
if (!S_ISREG(sb.st_mode)) {
xasprintf(cause, "%s: not a regular file", path);
return (-1);
}
if ((f = fopen(path, "rb")) == NULL) {
xasprintf(cause, "%s: %s", path, strerror(errno));
return (1);