mirror of https://github.com/Icinga/icinga2.git
Replace our execvpe() replacement with something GPL-compatible.
This commit is contained in:
parent
662130f47e
commit
905eed509f
|
@ -1,170 +1,207 @@
|
|||
/* -----------------------------------------------------------------------------
|
||||
(c) The University of Glasgow 1995-2004
|
||||
/* Copyright (C) 1991,92, 1995-99, 2002, 2004, 2005, 2007, 2009
|
||||
Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
Our low-level exec() variant.
|
||||
-------------------------------------------------------------------------- */
|
||||
#include "execvpe.h"
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
#ifdef __GLASGOW_HASKELL__
|
||||
#include "Rts.h"
|
||||
#endif
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
#if !(defined(_MSC_VER) || defined(__MINGW32__) || defined(_WIN32) || defined(HAVE_EXECVPE)) /* to the end */
|
||||
#ifndef __QNXNTO__
|
||||
|
||||
/* Evidently non-Posix. */
|
||||
/* #include "PosixSource.h" */
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with the GNU C Library; if not, write to the Free
|
||||
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||||
02111-1307 USA. */
|
||||
|
||||
#include <alloca.h>
|
||||
#include <unistd.h>
|
||||
#include <sys/time.h>
|
||||
#include <stdarg.h>
|
||||
#include <stdbool.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <errno.h>
|
||||
#include <paths.h>
|
||||
#include "execvpe.h"
|
||||
|
||||
/*
|
||||
* We want the search semantics of execvp, but we want to provide our
|
||||
* own environment, like execve. The following copyright applies to
|
||||
* this code, as it is a derivative of execvp:
|
||||
*-
|
||||
* Copyright (c) 1991 The Regents of the University of California.
|
||||
* All rights reserved.
|
||||
*
|
||||
* 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.
|
||||
* 3. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed by the University of
|
||||
* California, Berkeley and its contributors.
|
||||
* 4. Neither the name of the University nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
|
||||
*/
|
||||
#if !defined(_MSC_VER) && !defined(HAVE_EXECVPE)
|
||||
|
||||
int
|
||||
execvpe(char *name, char *const argv[], char **envp)
|
||||
/* The file is accessible but it is not an executable file. Invoke
|
||||
the shell to interpret it as a script. */
|
||||
static void
|
||||
scripts_argv (const char *file, char *const argv[], int argc, char **new_argv)
|
||||
{
|
||||
register int lp, ln;
|
||||
register char *p;
|
||||
int eacces=0, etxtbsy=0;
|
||||
char *bp, *cur, *path, *buf = 0;
|
||||
|
||||
/* If it's an absolute or relative path name, it's easy. */
|
||||
if (strchr(name, '/')) {
|
||||
bp = (char *) name;
|
||||
cur = path = buf = NULL;
|
||||
goto retry;
|
||||
}
|
||||
|
||||
/* Get the path we're searching. */
|
||||
if (!(path = getenv("PATH"))) {
|
||||
#ifdef HAVE_CONFSTR
|
||||
ln = confstr(_CS_PATH, NULL, 0);
|
||||
if ((cur = path = alloca(ln + 1)) != NULL) {
|
||||
path[0] = ':';
|
||||
(void) confstr (_CS_PATH, path + 1, ln);
|
||||
}
|
||||
#else
|
||||
if ((cur = path = alloca(1 + 1)) != NULL) {
|
||||
path[0] = ':';
|
||||
path[1] = '\0';
|
||||
}
|
||||
#endif
|
||||
} else {
|
||||
cur = alloca(strlen(path) + 1);
|
||||
strcpy(cur, path);
|
||||
path = cur;
|
||||
}
|
||||
|
||||
if (path == NULL || (bp = buf = alloca(strlen(path)+strlen(name)+2)) == NULL)
|
||||
goto done;
|
||||
|
||||
while (cur != NULL) {
|
||||
p = cur;
|
||||
if ((cur = strchr(cur, ':')) != NULL)
|
||||
*cur++ = '\0';
|
||||
|
||||
/*
|
||||
* It's a SHELL path -- double, leading and trailing colons mean the current
|
||||
* directory.
|
||||
*/
|
||||
if (!*p) {
|
||||
p = ".";
|
||||
lp = 1;
|
||||
} else
|
||||
lp = strlen(p);
|
||||
ln = strlen(name);
|
||||
|
||||
memcpy(buf, p, lp);
|
||||
buf[lp] = '/';
|
||||
memcpy(buf + lp + 1, name, ln);
|
||||
buf[lp + ln + 1] = '\0';
|
||||
|
||||
retry:
|
||||
(void) execve(bp, argv, envp);
|
||||
switch (errno) {
|
||||
case EACCES:
|
||||
eacces = 1;
|
||||
break;
|
||||
case ENOENT:
|
||||
break;
|
||||
case ENOEXEC:
|
||||
/* Construct an argument list for the shell. */
|
||||
new_argv[0] = (char *) _PATH_BSHELL;
|
||||
new_argv[1] = (char *) file;
|
||||
while (argc > 1)
|
||||
{
|
||||
register size_t cnt;
|
||||
register char **ap;
|
||||
|
||||
for (cnt = 0, ap = (char **) argv; *ap; ++ap, ++cnt)
|
||||
;
|
||||
if ((ap = alloca((cnt + 2) * sizeof(char *))) != NULL) {
|
||||
memcpy(ap + 2, argv + 1, cnt * sizeof(char *));
|
||||
|
||||
ap[0] = "sh";
|
||||
ap[1] = bp;
|
||||
(void) execve("/bin/sh", ap, envp);
|
||||
new_argv[argc] = argv[argc - 1];
|
||||
--argc;
|
||||
}
|
||||
goto done;
|
||||
}
|
||||
case ETXTBSY:
|
||||
if (etxtbsy < 3)
|
||||
(void) sleep(++etxtbsy);
|
||||
goto retry;
|
||||
default:
|
||||
goto done;
|
||||
}
|
||||
}
|
||||
if (eacces)
|
||||
errno = EACCES;
|
||||
else if (!errno)
|
||||
errno = ENOENT;
|
||||
done:
|
||||
return (-1);
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
/* Copied verbatim from ghc/lib/std/cbits/system.c. */
|
||||
void pPrPr_disableITimers (void)
|
||||
/* Execute FILE, searching in the `PATH' environment variable if it contains
|
||||
no slashes, with arguments ARGV and environment from ENVP. */
|
||||
int
|
||||
execvpe (file, argv, envp)
|
||||
const char *file;
|
||||
char *const argv[];
|
||||
char *const envp[];
|
||||
{
|
||||
#ifdef __GLASGOW_HASKELL__
|
||||
stopTimer();
|
||||
#endif
|
||||
if (*file == '\0')
|
||||
{
|
||||
/* We check the simple case first. */
|
||||
errno = ENOENT;
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (strchr (file, '/') != NULL)
|
||||
{
|
||||
/* Don't search when it contains a slash. */
|
||||
execve (file, argv, envp);
|
||||
|
||||
if (errno == ENOEXEC)
|
||||
{
|
||||
/* Count the arguments. */
|
||||
int argc = 0;
|
||||
while (argv[argc++])
|
||||
;
|
||||
size_t len = (argc + 1) * sizeof (char *);
|
||||
char **script_argv;
|
||||
void *ptr = NULL;
|
||||
script_argv = alloca (len);
|
||||
|
||||
if (script_argv != NULL)
|
||||
{
|
||||
scripts_argv (file, argv, argc, script_argv);
|
||||
execve (script_argv[0], script_argv, envp);
|
||||
|
||||
free (ptr);
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
size_t pathlen;
|
||||
size_t alloclen = 0;
|
||||
char *path = getenv ("PATH");
|
||||
if (path == NULL)
|
||||
{
|
||||
pathlen = confstr (_CS_PATH, (char *) NULL, 0);
|
||||
alloclen = pathlen + 1;
|
||||
}
|
||||
else
|
||||
pathlen = strlen (path);
|
||||
|
||||
size_t len = strlen (file) + 1;
|
||||
alloclen += pathlen + len + 1;
|
||||
|
||||
char *name;
|
||||
name = alloca (alloclen);
|
||||
|
||||
if (path == NULL)
|
||||
{
|
||||
/* There is no `PATH' in the environment.
|
||||
The default search path is the current directory
|
||||
followed by the path `confstr' returns for `_CS_PATH'. */
|
||||
path = name + pathlen + len + 1;
|
||||
path[0] = ':';
|
||||
(void) confstr (_CS_PATH, path + 1, pathlen);
|
||||
}
|
||||
|
||||
/* Copy the file name at the top. */
|
||||
name = (char *) memcpy (name + pathlen + 1, file, len);
|
||||
/* And add the slash. */
|
||||
*--name = '/';
|
||||
|
||||
char **script_argv = NULL;
|
||||
bool got_eacces = false;
|
||||
char *p = path;
|
||||
do
|
||||
{
|
||||
char *startp;
|
||||
|
||||
path = p;
|
||||
p = strchr (path, ':');
|
||||
if (!p)
|
||||
p = path + strlen(path);
|
||||
|
||||
if (p == path)
|
||||
/* Two adjacent colons, or a colon at the beginning or the end
|
||||
of `PATH' means to search the current directory. */
|
||||
startp = name + 1;
|
||||
else
|
||||
startp = (char *) memcpy (name - (p - path), path, p - path);
|
||||
|
||||
/* Try to execute this name. If it works, execve will not return. */
|
||||
execve (startp, argv, envp);
|
||||
|
||||
if (errno == ENOEXEC)
|
||||
{
|
||||
if (script_argv == NULL)
|
||||
{
|
||||
/* Count the arguments. */
|
||||
int argc = 0;
|
||||
while (argv[argc++])
|
||||
;
|
||||
size_t arglen = (argc + 1) * sizeof (char *);
|
||||
script_argv = alloca (arglen);
|
||||
if (script_argv == NULL)
|
||||
{
|
||||
/* A possible EACCES error is not as important as
|
||||
the ENOMEM. */
|
||||
got_eacces = false;
|
||||
break;
|
||||
}
|
||||
scripts_argv (startp, argv, argc, script_argv);
|
||||
}
|
||||
|
||||
execve (script_argv[0], script_argv, envp);
|
||||
}
|
||||
|
||||
switch (errno)
|
||||
{
|
||||
case EACCES:
|
||||
/* Record the we got a `Permission denied' error. If we end
|
||||
up finding no executable we can use, we want to diagnose
|
||||
that we did find one but were denied access. */
|
||||
got_eacces = true;
|
||||
case ENOENT:
|
||||
case ESTALE:
|
||||
case ENOTDIR:
|
||||
/* Those errors indicate the file is missing or not executable
|
||||
by us, in which case we want to just try the next path
|
||||
directory. */
|
||||
case ENODEV:
|
||||
case ETIMEDOUT:
|
||||
/* Some strange filesystems like AFS return even
|
||||
stranger error numbers. They cannot reasonably mean
|
||||
anything else so ignore those, too. */
|
||||
break;
|
||||
|
||||
default:
|
||||
/* Some other error means we found an executable file, but
|
||||
something went wrong executing it; return the error to our
|
||||
caller. */
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
while (*p++ != '\0');
|
||||
|
||||
/* We tried every element and none of them worked. */
|
||||
if (got_eacces)
|
||||
/* At least one failure was due to permissions, so report that
|
||||
error. */
|
||||
errno = EACCES;
|
||||
}
|
||||
|
||||
/* Return the error from the last attempt (probably ENOENT). */
|
||||
return -1;
|
||||
}
|
||||
|
||||
#endif
|
||||
#endif /* !defined(_MSC_VER) && !defined(HAVE_EXECVPE) */
|
||||
|
|
|
@ -1,29 +1,37 @@
|
|||
/* ----------------------------------------------------------------------------
|
||||
(c) The University of Glasgow 2004
|
||||
/******************************************************************************
|
||||
* Icinga 2 *
|
||||
* Copyright (C) 2012 Icinga Development Team (http://www.icinga.org/) *
|
||||
* *
|
||||
* This program is free software; you can redistribute it and/or *
|
||||
* modify it under the terms of the GNU General Public License *
|
||||
* as published by the Free Software Foundation; either version 2 *
|
||||
* of the License, or (at your option) any later version. *
|
||||
* *
|
||||
* This program is distributed in the hope that it will be useful, *
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
|
||||
* GNU General Public License for more details. *
|
||||
* *
|
||||
* You should have received a copy of the GNU General Public License *
|
||||
* along with this program; if not, write to the Free Software Foundation *
|
||||
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
|
||||
******************************************************************************/
|
||||
|
||||
Interface for code in execvpe.c
|
||||
------------------------------------------------------------------------- */
|
||||
#ifndef EXECVPE_H
|
||||
#define EXECVPE_H
|
||||
|
||||
#include "config.h"
|
||||
|
||||
#include <unistd.h>
|
||||
#include <errno.h>
|
||||
#include <sys/types.h>
|
||||
#if HAVE_SYS_WAIT_H
|
||||
#include <sys/wait.h>
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif /* __cplusplus */
|
||||
|
||||
#if !defined(_MSC_VER) && !defined(__MINGW32__) && !defined(_WIN32) && !defined(HAVE_EXECVPE)
|
||||
# ifndef __QNXNTO__
|
||||
extern int execvpe(char *name, char *const argv[], char **envp);
|
||||
# endif
|
||||
extern void pPrPr_disableITimers (void);
|
||||
#endif
|
||||
#if !defined(_MSC_VER) && !defined(HAVE_EXECVPE)
|
||||
int execvpe(const char *file, char *const argv[], char *const envp[]);
|
||||
#endif /* !defined(_MSC_VER) && !defined(HAVE_EXECVPE) */
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif /* __cplusplus */
|
||||
|
||||
#endif /* EXECVPE_H */
|
||||
|
|
Loading…
Reference in New Issue