126 lines
2.2 KiB
C
126 lines
2.2 KiB
C
/* Reentrant versions of execution system calls. These
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implementations just call the usual system calls. */
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#include <reent.h>
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#include <unistd.h>
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#include <sys/wait.h>
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#include <_syslist.h>
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/* Some targets provides their own versions of these functions. Those
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targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS. */
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#ifdef _REENT_ONLY
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#ifndef REENTRANT_SYSCALLS_PROVIDED
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#define REENTRANT_SYSCALLS_PROVIDED
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#endif
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#endif
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/* If NO_EXEC is defined, we don't need these functions. */
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#if defined (REENTRANT_SYSCALLS_PROVIDED) || defined (NO_EXEC)
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int _dummy_exec_syscalls = 1;
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#else
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/* We use the errno variable used by the system dependent layer. */
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#undef errno
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extern int errno;
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/*
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FUNCTION
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<<_execve_r>>---Reentrant version of execve
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INDEX
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_execve_r
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SYNOPSIS
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#include <reent.h>
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int _execve_r(struct _reent *<[ptr]>, const char *<[name]>,
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char *const <[argv]>[], char *const <[env]>[]);
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DESCRIPTION
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This is a reentrant version of <<execve>>. It
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takes a pointer to the global data block, which holds
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<<errno>>.
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*/
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int
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_execve_r (struct _reent *ptr,
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const char *name,
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char *const argv[],
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char *const env[])
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{
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int ret;
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errno = 0;
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if ((ret = _execve (name, argv, env)) == -1 && errno != 0)
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ptr->_errno = errno;
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return ret;
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}
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/*
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NEWPAGE
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FUNCTION
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<<_fork_r>>---Reentrant version of fork
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INDEX
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_fork_r
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SYNOPSIS
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#include <reent.h>
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int _fork_r(struct _reent *<[ptr]>);
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DESCRIPTION
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This is a reentrant version of <<fork>>. It
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takes a pointer to the global data block, which holds
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<<errno>>.
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*/
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#ifndef NO_FORK
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int
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_fork_r (struct _reent *ptr)
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{
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int ret;
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errno = 0;
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if ((ret = _fork ()) == -1 && errno != 0)
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ptr->_errno = errno;
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return ret;
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}
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#endif
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/*
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NEWPAGE
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FUNCTION
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<<_wait_r>>---Reentrant version of wait
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INDEX
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_wait_r
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SYNOPSIS
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#include <reent.h>
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int _wait_r(struct _reent *<[ptr]>, int *<[status]>);
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DESCRIPTION
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This is a reentrant version of <<wait>>. It
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takes a pointer to the global data block, which holds
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<<errno>>.
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*/
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int
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_wait_r (struct _reent *ptr,
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int *status)
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{
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int ret;
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errno = 0;
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if ((ret = _wait (status)) == -1 && errno != 0)
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ptr->_errno = errno;
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return ret;
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}
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#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */
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