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Add minimal fchownat and fchmodat implementations.

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Fixes builds on at least OS X Lion, NetBSD 6 and Solaris 10.
This commit is contained in:
Darren Tucker 2019-01-18 11:09:01 +11:00
parent 091093d258
commit a6258e5dc3
3 changed files with 72 additions and 0 deletions
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2
configure.ac
View File

@ -1719,7 +1719,9 @@ AC_CHECK_FUNCS([ \
errx \
explicit_bzero \
fchmod \
fchmodat \
fchown \
fchownat \
flock \
freeaddrinfo \
freezero \

58
openbsd-compat/bsd-misc.c
View File

@ -154,6 +154,64 @@ utimensat(int fd, const char *path, const struct timespec times[2],
}
#endif
#ifndef HAVE_FCHOWNAT
/*
* A limited implementation of fchownat() that only implements the
* functionality used by OpenSSH, currently only AT_FDCWD and
* AT_SYMLINK_NOFOLLOW.
*/
int
fchownat(int fd, const char *path, uid_t owner, gid_t group, int flag)
{
int ret, oflags = O_WRONLY;
if (fd != AT_FDCWD) {
errno = ENOSYS;
return -1;
}
# ifndef HAVE_FCHOWN
return chown(pathname, owner, group);
# else
if (flag & AT_SYMLINK_NOFOLLOW)
oflags |= O_NOFOLLOW;
if ((fd = open(path, oflags)) == -1)
return -1;
ret = fchown(fd, owner, group);
close(fd);
return ret;
# endif
}
#endif
#ifndef HAVE_FCHMODAT
/*
* A limited implementation of fchmodat() that only implements the
* functionality used by OpenSSH, currently only AT_FDCWD and
* AT_SYMLINK_NOFOLLOW.
*/
int
fchmodat(int fd, const char *path, mode_t mode, int flag)
{
int ret, oflags = O_WRONLY;
if (fd != AT_FDCWD) {
errno = ENOSYS;
return -1;
}
# ifndef HAVE_FCHMOD
return chown(pathname, owner, group);
# else
if (flag & AT_SYMLINK_NOFOLLOW)
oflags |= O_NOFOLLOW;
if ((fd = open(path, oflags)) == -1)
return -1;
ret = fchmod(fd, mode);
close(fd);
return ret;
# endif
}
#endif
#ifndef HAVE_TRUNCATE
int truncate(const char *path, off_t length)
{

12
openbsd-compat/bsd-misc.h
View File

@ -72,6 +72,18 @@ int utimes(char *, struct timeval *);
int utimensat(int, const char *, const struct timespec[2], int);
#endif
#ifndef AT_FDCWD
# define AT_FDCWD (-2)
#endif
#ifndef HAVE_FCHMODAT
int fchmodat(int, const char *, mode_t, int);
#endif
#ifndef HAVE_FCHOWNAT
int fchownat(int, const char *, uid_t, gid_t, int);
#endif
#ifndef HAVE_TRUNCATE
int truncate (const char *, off_t);
#endif /* HAVE_TRUNCATE */