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/* compatability layer for u9fs support on CYGWIN */
#include <unistd.h>
#include <errno.h>
ssize_t
pread(int fd, void *p, size_t n, off_t off)
{
off_t ooff;
int oerrno;
if ((ooff = lseek(fd, off, SEEK_SET)) == -1)
return -1;
n = read(fd, p, n);
oerrno = errno;
lseek(fd, ooff, SEEK_SET);
errno = oerrno;
return n;
}
ssize_t
pwrite(int fd, const void *p, size_t n, off_t off)
{
off_t ooff;
int oerrno;
if ((ooff = lseek(fd, off, SEEK_SET)) == -1)
return -1;
n = write(fd, p, n);
oerrno = errno;
lseek(fd, ooff, SEEK_SET);
errno = oerrno;
return n;
}
int
setreuid(int ruid, int euid)
{
if (ruid != -1)
if (setuid(ruid) == -1)
return(-1);
if (euid != -1)
if (seteuid(euid) == -1)
return(-1);
}
int
setregid(int rgid, int egid)
{
if (rgid != -1)
if (setgid(rgid) == -1)
return(-1);
if (egid != -1)
if (setegid(egid) == -1)
return(-1);
}
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