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/* efopen.c
Open a stdio file with appropriate permissions. */
#include "uucp.h"
#include "uudefs.h"
#include "sysdep.h"
#include "system.h"
#include <errno.h>
#if HAVE_FCNTL_H
#include <fcntl.h>
#else
#if HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#endif
#ifndef O_RDONLY
#define O_RDONLY 0
#define O_WRONLY 1
#define O_RDWR 2
#endif
#ifndef O_APPEND
#ifdef FAPPEND
#define O_APPEND FAPPEND
#endif
#endif
#ifndef O_NOCTTY
#define O_NOCTTY 0
#endif
#ifndef FD_CLOEXEC
#define FD_CLOEXEC 1
#endif
FILE *
esysdep_fopen (zfile, fpublic, fappend, fmkdirs)
const char *zfile;
boolean fpublic;
boolean fappend;
boolean fmkdirs;
{
int imode;
int o;
FILE *e;
if (fpublic)
imode = IPUBLIC_FILE_MODE;
else
imode = IPRIVATE_FILE_MODE;
if (! fappend)
o = creat ((char *) zfile, imode);
else
{
#ifdef O_CREAT
o = open ((char *) zfile,
O_WRONLY | O_APPEND | O_CREAT | O_NOCTTY,
imode);
#else
o = open ((char *) zfile, O_WRONLY | O_NOCTTY);
if (o < 0 && errno == ENOENT)
o = creat ((char *) zfile, imode);
#endif /* ! defined (O_CREAT) */
}
if (o < 0)
{
if (errno == ENOENT && fmkdirs)
{
if (! fsysdep_make_dirs (zfile, fpublic))
return NULL;
if (! fappend)
o = creat ((char *) zfile, imode);
else
{
#ifdef O_CREAT
o = open ((char *) zfile,
O_WRONLY | O_APPEND | O_CREAT | O_NOCTTY,
imode);
#else
o = creat ((char *) zfile, imode);
#endif
}
}
if (o < 0)
{
ulog (LOG_ERROR, "open (%s): %s", zfile, strerror (errno));
return NULL;
}
}
#ifndef O_CREAT
#ifdef O_APPEND
if (fappend)
{
if (fcntl (o, F_SETFL, O_APPEND) < 0)
{
ulog (LOG_ERROR, "fcntl (%s, O_APPEND): %s", zfile,
strerror (errno));
(void) close (o);
return NULL;
}
}
#endif /* defined (O_APPEND) */
#endif /* ! defined (O_CREAT) */
if (fcntl (o, F_SETFD, fcntl (o, F_GETFD, 0) | FD_CLOEXEC) < 0)
{
ulog (LOG_ERROR, "fcntl (%s, FD_CLOEXEC): %s", zfile,
strerror (errno));
(void) close (o);
return NULL;
}
if (fappend)
e = fdopen (o, (char *) "a");
else
e = fdopen (o, (char *) "w");
if (e == NULL)
{
ulog (LOG_ERROR, "fdopen: %s", strerror (errno));
(void) close (o);
}
return e;
}
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