File Manager

003 File Manager

Current Path: /usr/src/contrib/sendmail/libsm

usr / src / contrib / sendmail / libsm /

📁 ..
📄 Makefile(346 B)
📄 Makefile.m4(1.92 KB)
📄 README(4.42 KB)
📄 assert.c(4.13 KB)
📄 assert.html(13.86 KB)
📄 b-strcmp.c(3.4 KB)
📄 b-strl.c(5 KB)
📄 cdefs.html(2.39 KB)
📄 cf.c(1.97 KB)
📄 clock.c(13.89 KB)
📄 clrerr.c(872 B)
📄 config.c(4.47 KB)
📄 debug.c(8.91 KB)
📄 debug.html(7.68 KB)
📄 errstring.c(6.03 KB)
📄 exc.c(13.05 KB)
📄 exc.html(23.27 KB)
📄 fclose.c(3.13 KB)
📄 feof.c(961 B)
📄 ferror.c(932 B)
📄 fflush.c(3.1 KB)
📄 fget.c(2.37 KB)
📄 findfp.c(10.65 KB)
📄 flags.c(1.27 KB)
📄 fopen.c(8.3 KB)
📄 fpos.c(3.12 KB)
📄 fprintf.c(1.35 KB)
📄 fpurge.c(1.15 KB)
📄 fput.c(1.25 KB)
📄 fread.c(2.28 KB)
📄 fscanf.c(1.34 KB)
📄 fseek.c(7.25 KB)
📄 fvwrite.c(6.24 KB)
📄 fvwrite.h(740 B)
📄 fwalk.c(1.41 KB)
📄 fwrite.c(1.54 KB)
📄 gen.html(910 B)
📄 get.c(1.12 KB)
📄 glue.h(731 B)
📄 heap.c(17.29 KB)
📄 heap.html(13.07 KB)
📄 index.html(5.95 KB)
📄 inet6_ntop.c(1.1 KB)
📄 io.html(26.6 KB)
📄 ldap.c(35.72 KB)
📄 local.h(9.42 KB)
📄 makebuf.c(3.36 KB)
📄 match.c(2.77 KB)
📄 mbdb.c(16.61 KB)
📄 memstat.c(5.13 KB)
📄 mpeix.c(13.84 KB)
📄 niprop.c(4.64 KB)
📄 notify.c(3.32 KB)
📄 put.c(1.61 KB)
📄 refill.c(7.09 KB)
📄 rewind.c(1.08 KB)
📄 rpool.c(11.54 KB)
📄 rpool.html(6.08 KB)
📄 sem.c(4.41 KB)
📄 setvbuf.c(4.2 KB)
📄 shm.c(2.62 KB)
📄 signal.c(6.75 KB)
📄 smstdio.c(6.14 KB)
📄 snprintf.c(2.29 KB)
📄 sscanf.c(2.26 KB)
📄 stdio.c(9.7 KB)
📄 strcasecmp.c(3.14 KB)
📄 strdup.c(2.79 KB)
📄 strerror.c(1.27 KB)
📄 strexit.c(2.76 KB)
📄 string.c(1.29 KB)
📄 stringf.c(1.77 KB)
📄 strio.c(9.18 KB)
📄 strl.c(7.52 KB)
📄 strrevcmp.c(1.61 KB)
📄 strto.c(5.45 KB)
📄 syslogio.c(4.11 KB)
📄 t-cf.c(934 B)
📄 t-event.c(1.79 KB)
📄 t-exc.c(2.75 KB)
📄 t-fget.c(1.71 KB)
📄 t-float.c(1.78 KB)
📄 t-fopen.c(875 B)
📄 t-heap.c(1.3 KB)
📄 t-inet6_ntop.c(1.4 KB)
📄 t-match.c(1.1 KB)
📄 t-memstat.c(2.17 KB)
📄 t-notify.c(1.81 KB)
📄 t-path.c(742 B)
📄 t-qic.c(5.43 KB)
📄 t-rpool.c(1.5 KB)
📄 t-scanf.c(1.38 KB)
📄 t-sem.c(5.85 KB)
📄 t-shm.c(4.42 KB)
📄 t-smstdio.c(1.55 KB)
📄 t-string.c(968 B)
📄 t-strio.c(775 B)
📄 t-strl.c(3.53 KB)
📄 t-strrevcmp.c(994 B)
📄 t-types.c(2.7 KB)
📄 test.c(2.73 KB)
📄 ungetc.c(3.93 KB)
📄 util.c(4.46 KB)
📄 vasprintf.c(2.91 KB)
📄 vfprintf.c(24.09 KB)
📄 vfscanf.c(18.76 KB)
📄 vprintf.c(999 B)
📄 vsnprintf.c(1.87 KB)
📄 wbuf.c(2.51 KB)
📄 wsetup.c(1.88 KB)
📄 xtrap.c(653 B)

Editing: fopen.c

/*
 * Copyright (c) 2000-2002, 2004 Proofpoint, Inc. and its suppliers.
 *      All rights reserved.
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek.
 *
 * By using this file, you agree to the terms and conditions set
 * forth in the LICENSE file which can be found at the top level of
 * the sendmail distribution.
 */

#include <sm/gen.h>
SM_RCSID("@(#)$Id: fopen.c,v 1.63 2013-11-22 20:51:42 ca Exp $")
#include <errno.h>
#include <setjmp.h>
#include <sm/time.h>
#include <sm/heap.h>
#include <sm/signal.h>
#include <sm/assert.h>
#include <sm/io.h>
#include <sm/clock.h>
#include "local.h"

static void	openalrm __P((int));
static void	reopenalrm __P((int));
extern int      sm_io_fclose __P((SM_FILE_T *));

static jmp_buf OpenTimeOut, ReopenTimeOut;

/*
**  OPENALRM -- handler when timeout activated for sm_io_open()
**
**  Returns flow of control to where setjmp(OpenTimeOut) was set.
**
**	Parameters:
**		sig -- unused
**
**	Returns:
**		does not return
**
**	Side Effects:
**		returns flow of control to setjmp(OpenTimeOut).
**
**	NOTE:	THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
**		ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
**		DOING.
*/

/* ARGSUSED0 */
static void
openalrm(sig)
	int sig;
{
	longjmp(OpenTimeOut, 1);
}
/*
**  REOPENALRM -- handler when timeout activated for sm_io_reopen()
**
**  Returns flow of control to where setjmp(ReopenTimeOut) was set.
**
**	Parameters:
**		sig -- unused
**
**	Returns:
**		does not return
**
**	Side Effects:
**		returns flow of control to setjmp(ReopenTimeOut).
**
**	NOTE:	THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
**		ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
**		DOING.
*/

/* ARGSUSED0 */
static void
reopenalrm(sig)
	int sig;
{
	longjmp(ReopenTimeOut, 1);
}

/*
**  SM_IO_OPEN -- open a file of a specific type
**
**	Parameters:
**		type -- type of file to open
**		timeout -- time to complete the open
**		info -- info describing what is to be opened (type dependent)
**		flags -- user selected flags
**		rpool -- pointer to rpool to be used for this open
**
**	Returns:
**		Raises exception on heap exhaustion.
**		Aborts if type is invalid.
**		Returns NULL and sets errno
**			- when the type specific open fails
**			- when open vector errors
**			- when flags not set or invalid
**		Success returns a file pointer to the opened file type.
*/

SM_FILE_T *
sm_io_open(type, timeout, info, flags, rpool)
	const SM_FILE_T *type;
	int SM_NONVOLATILE timeout;	/* this is not the file type timeout */
	const void *info;
	int flags;
	const void *rpool;
{
	register SM_FILE_T *fp;
	int ioflags;
	SM_EVENT *evt = NULL;

ioflags = sm_flags(flags);

if (ioflags == 0)
	{
		/* must give some indication/intent */
		errno = EINVAL;
		return NULL;
	}

if (timeout == SM_TIME_DEFAULT)
		timeout = SM_TIME_FOREVER;
	if (timeout == SM_TIME_IMMEDIATE)
	{
		errno = EAGAIN;
		return NULL;
	}

fp = sm_fp(type, ioflags, NULL);

/*  Okay, this is where we set the timeout.  */
	if (timeout != SM_TIME_FOREVER)
	{
		if (setjmp(OpenTimeOut) != 0)
		{
			errno = EAGAIN;
			return NULL;
		}
		evt = sm_seteventm(timeout, openalrm, 0);
	}

if ((*fp->f_open)(fp, info, flags, rpool) < 0)
	{
		fp->f_flags = 0;	/* release */
		fp->sm_magic = NULL;	/* release */
		return NULL;
	}

/*  We're back. So undo our timeout and handler */
	if (evt != NULL)
		sm_clrevent(evt);

#if SM_RPOOL
	if (rpool != NULL)
		sm_rpool_attach_x(rpool, sm_io_fclose, fp);
#endif

return fp;
}
/*
**  SM_IO_DUP -- duplicate a file pointer
**
**	Parameters:
**		fp -- file pointer to duplicate
**
**	Returns:
**		Success - the duplicated file pointer
**		Failure - NULL (was an invalid file pointer or too many open)
**
**	Increments the duplicate counter (dup_cnt) for the open file pointer.
**	The counter counts the number of duplicates. When the duplicate
**	counter is 0 (zero) then the file pointer is the only one left
**	(no duplicates, it is the only one).
*/

SM_FILE_T *
sm_io_dup(fp)
	SM_FILE_T *fp;
{

SM_REQUIRE_ISA(fp, SmFileMagic);
	if (fp->sm_magic != SmFileMagic)
	{
		errno = EBADF;
		return NULL;
	}
	if (fp->f_dup_cnt >= INT_MAX - 1)
	{
		/* Can't let f_dup_cnt wrap! */
		errno = EMFILE;
		return NULL;
	}
	fp->f_dup_cnt++;
	return fp;
}
/*
**  SM_IO_REOPEN -- open a new file using the old file pointer
**
**	Parameters:
**		type -- file type to be opened
**		timeout -- time to complete the reopen
**		info -- information about what is to be "re-opened" (type dep.)
**		flags -- user flags to map to internal flags
**		rpool -- rpool file to be associated with
**		fp -- the file pointer to reuse
**
**	Returns:
**		Raises an exception on heap exhaustion.
**		Aborts if type is invalid.
**		Failure: returns NULL
**		Success: returns "reopened" file pointer
*/

SM_FILE_T *
sm_io_reopen(type, timeout, info, flags, rpool, fp)
	const SM_FILE_T *type;
	int SM_NONVOLATILE timeout;
	const void *info;
	int flags;
	const void *rpool;
	SM_FILE_T *fp;
{
	int ioflags, ret;
	SM_FILE_T *fp2;
	SM_EVENT *evt = NULL;

if ((ioflags = sm_flags(flags)) == 0)
	{
		(void) sm_io_close(fp, timeout);
		return NULL;
	}

if (!Sm_IO_DidInit)
		sm_init();

if (timeout == SM_TIME_DEFAULT)
		timeout = SM_TIME_FOREVER;
	if (timeout == SM_TIME_IMMEDIATE)
	{
		/*
		**  Filling the buffer will take time and we are wanted to
		**  return immediately. So...
		*/

errno = EAGAIN;
		return NULL;
	}
	/*  Okay, this is where we set the timeout.  */
	if (timeout != SM_TIME_FOREVER)
	{
		if (setjmp(ReopenTimeOut) != 0)
		{
			errno = EAGAIN;
			return NULL;
		}

evt = sm_seteventm(timeout, reopenalrm, 0);
	}

/*
	**  There are actually programs that depend on being able to "reopen"
	**  descriptors that weren't originally open.  Keep this from breaking.
	**  Remember whether the stream was open to begin with, and which file
	**  descriptor (if any) was associated with it.  If it was attached to
	**  a descriptor, defer closing it; reopen("/dev/stdin", "r", stdin)
	**  should work.  This is unnecessary if it was not a Unix file.
	*/

if (fp != NULL)
	{
		if (fp->sm_magic != SmFileMagic)
			fp->f_flags = SMFEOF;	/* hold on to it */
		else
		{
			/* flush the stream; ANSI doesn't require this. */
			(void) sm_io_flush(fp, SM_TIME_FOREVER);
			(void) sm_io_close(fp, SM_TIME_FOREVER);
		}
	}

fp2 = sm_fp(type, ioflags, fp);
	ret = (*fp2->f_open)(fp2, info, flags, rpool);

/*  We're back. So undo our timeout and handler */
	if (evt != NULL)
		sm_clrevent(evt);

if (ret < 0)
	{
		fp2->f_flags = 0;	/* release */
		fp2->sm_magic = NULL;	/* release */
		return NULL;
	}

/*
	**  We're not preserving this logic (below) for sm_io because it is now
	**  abstracted at least one "layer" away. By closing and reopening
	**  the 1st fd used should be the just released one (when Unix
	**  behavior followed). Old comment::
	**  If reopening something that was open before on a real file, try
	**  to maintain the descriptor.  Various C library routines (perror)
	**  assume stderr is always fd STDERR_FILENO, even if being reopen'd.
	*/

#if SM_RPOOL
	if (rpool != NULL)
		sm_rpool_attach_x(rpool, sm_io_close, fp2);
#endif

return fp2;
}
/*
**  SM_IO_AUTOFLUSH -- link another file to this for auto-flushing
**
**	When a read occurs on fp, fp2 will be flushed iff there is no
**	data waiting on fp.
**
**	Parameters:
**		fp -- the file opened for reading.
**		fp2 -- the file opened for writing.
**
**	Returns:
**		The old flush file pointer.
*/

SM_FILE_T *
sm_io_autoflush(fp, fp2)
	SM_FILE_T *fp;
	SM_FILE_T *fp2;
{
	SM_FILE_T *savefp;

SM_REQUIRE_ISA(fp, SmFileMagic);
	if (fp2 != NULL)
		SM_REQUIRE_ISA(fp2, SmFileMagic);

savefp = fp->f_flushfp;
	fp->f_flushfp = fp2;
	return savefp;
}
/*
**  SM_IO_AUTOMODE -- link another file to this for auto-moding
**
**	When the mode (blocking or non-blocking) changes for fp1 then
**	update fp2's mode at the same time. This is to be used when
**	a system dup() has generated a second file descriptor for
**	another sm_io_open() by file descriptor. The modes have been
**	linked in the system and this formalizes it for sm_io internally.
**
**	Parameters:
**		fp1 -- the first file
**		fp2 -- the second file
**
**	Returns:
**		nothing
*/

void
sm_io_automode(fp1, fp2)
	SM_FILE_T *fp1;
	SM_FILE_T *fp2;
{
	SM_REQUIRE_ISA(fp1, SmFileMagic);
	SM_REQUIRE_ISA(fp2, SmFileMagic);

fp1->f_modefp = fp2;
	fp2->f_modefp = fp1;
}

003 File Manager

Editing: fopen.c

Upload File

Create Folder