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/*
* argvec.c - build_arg_vec() for rssh
*
* Copyright 2003-2005 Derek D. Martin ( code at pizzashack dot org ).
*
* This program is licensed under a BSD-style license, as follows:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/* SYSTEM INCLUDES */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif /* HAVE_STDLIB_H */
#ifdef HAVE_WORDEXP_H
#include <wordexp.h>
#endif /* HAVE_WORDEXP_H */
#ifdef HAVE_SYSLOG_H
#include <syslog.h>
#endif /* HAVE_SYSLOG_H */
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif /* HAVE_SYS_TYPES_H */
#ifdef HAVE_LIBGEN_H
#include <libgen.h>
#endif /* HAVE_LIBGEN_H */
#ifdef HAVE_STRING_H
#include <string.h>
#endif /* HAVE_STRING_H */
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif /* HAVE_ERRNO_H */
/* LOCAL INCLUDES */
#include "pathnames.h"
#include "rssh.h"
#include "log.h"
#include "rsshconf.h"
extern char *progname;
extern char *username;
/*
* build_arg_vector() - return a pointer to a vector of strings which
* represent the arguments of the command to execv().
*/
char **build_arg_vector( char *str, size_t reserve )
{
wordexp_t result;
int retc;
#ifdef WRDE_ERRNO
int errornum;
char *message;
#endif /* WRDE_ERRNO */
result.we_offs = reserve;
if ( (retc = wordexp(str, &result, WRDE_NOCMD|WRDE_DOOFFS)) ){
log_set_priority(LOG_ERR);
switch( retc ){
case WRDE_BADCHAR:
case WRDE_CMDSUB:
fprintf(stderr, "%s: bad characters in arguments\n",
progname);
log_msg("user %s usedbad chars in command", username);
break;
#ifdef WRDE_ERRNO
case WRDE_ERRNO:
errornum = errno;
fprintf(stderr, "%s: error expanding arguments\n",
progname);
log_msg("error expanding arguments for user %s",
username);
log_msg("wordexp() set errno to %d", errornum);
message = strdup(strerror(errno));
log_msg(message);
break;
#endif /* WRDE_ERRNO */
case WRDE_NOSPACE:
fprintf(stderr, "%s: wordexp() allocation failed\n",
progname);
log_msg("wordexp() allocation failed");
break;
case WRDE_BADVAL:
fprintf(stderr, "%s: wordexp() bad value\n",
progname);
log_msg("wordexp() bad value");
break;
case WRDE_SYNTAX:
fprintf(stderr, "%s: wordexp() bad syntax\n",
progname);
log_msg("wordexp() bad syntax");
break;
#ifdef WRDE_NOSYS
case WRDE_NOSYS:
fprintf(stderr, "%s: wordexp() not supported\n",
progname);
log_msg("wordexp() not supported (shouldn't happen)");
break;
#endif /* WRDE_NOSYS */
default:
fprintf(stderr, "%s: error expanding arguments\n",
progname);
log_msg("error expanding arguments for user %s",
username);
log_msg("retc = %d (this shouldn't happen)", retc);
}
exit(1);
}
return result.we_wordv;
}
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