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newlib-2.1.0

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git-svn-id: svn://kolibrios.org@4921 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge)
2014-05-10 22:12:19 +00:00
parent 914e67bd24
commit 7315bb05c0
204 changed files with 10781 additions and 3986 deletions
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106
contrib/sdk/sources/newlib/libc/stdlib/system.c
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@@ -61,16 +61,42 @@ Supporting OS subroutines required: <<_exit>>, <<_execve>>, <<_fork_r>>,
#include <_syslist.h>
#include <reent.h>
#if defined (unix) || defined (__CYGWIN__)
static int _EXFUN(do_system, (struct _reent *ptr _AND _CONST char *s));
#endif
int
_DEFUN(_system_r, (ptr, s),
struct _reent *ptr _AND
_CONST char *s)
{
#if defined(HAVE_SYSTEM)
return _system (s);
ptr = ptr;
#elif defined(NO_EXEC)
if (s == NULL)
return 0;
errno = ENOSYS;
return -1;
#else
/* ??? How to handle (s == NULL) here is not exactly clear.
If _fork_r fails, that's not really a justification for returning 0.
For now we always return 0 and leave it to each target to explicitly
handle otherwise (this can always be relaxed in the future). */
#if defined (unix) || defined (__CYGWIN__)
if (s == NULL)
return 1;
return do_system (ptr, s);
#else
if (s == NULL)
return 0;
errno = ENOSYS;
return -1;
#endif
#endif
}
#ifndef _REENT_ONLY
@@ -83,3 +109,83 @@ _DEFUN(system, (s),
}
#endif
#if defined (unix) && !defined (__CYGWIN__) && !defined(__rtems__)
extern char **environ;
/* Only deal with a pointer to environ, to work around subtle bugs with shared
libraries and/or small data systems where the user declares his own
'environ'. */
static char ***p_environ = &environ;
static int
_DEFUN(do_system, (ptr, s),
struct _reent *ptr _AND
_CONST char *s)
{
char *argv[4];
int pid, status;
argv[0] = "sh";
argv[1] = "-c";
argv[2] = (char *) s;
argv[3] = NULL;
if ((pid = _fork_r (ptr)) == 0)
{
_execve ("/bin/sh", argv, *p_environ);
exit (100);
}
else if (pid == -1)
return -1;
else
{
int rc = _wait_r (ptr, &status);
if (rc == -1)
return -1;
status = (status >> 8) & 0xff;
return status;
}
}
#endif
#if defined (__CYGWIN__)
static int
_DEFUN(do_system, (ptr, s),
struct _reent *ptr _AND
_CONST char *s)
{
char *argv[4];
int pid, status;
argv[0] = "sh";
argv[1] = "-c";
argv[2] = (char *) s;
argv[3] = NULL;
if ((pid = vfork ()) == 0)
{
/* ??? It's not clear what's the right path to take (pun intended :-).
There won't be an "sh" in any fixed location so we need each user
to be able to say where to find "sh". That suggests using an
environment variable, but after a few more such situations we may
have too many of them. */
char *sh = getenv ("SH_PATH");
if (sh == NULL)
sh = "/bin/sh";
_execve (sh, argv, environ);
exit (100);
}
else if (pid == -1)
return -1;
else
{
extern int _wait (int *);
int rc = _wait (&status);
if (rc == -1)
return -1;
status = (status >> 8) & 0xff;
return status;
}
}
#endif