mirror of
git://anongit.mindrot.org/openssh.git
synced 2024-12-24 19:02:06 +00:00
remove realpath() compat replacement
We shipped a BSD implementation of realpath() because sftp-server depended on its behaviour. OpenBSD is now moving to a more strictly POSIX-compliant realpath(2), so sftp-server now unconditionally requires its own BSD-style realpath implementation. As such, there is no need to carry another independant implementation in openbsd-compat. ok dtucker@
This commit is contained in:
Damien Miller
parent
696fb4298e
commit
4efe1adf05
4
.depend
4
.depend
@ -63,7 +63,7 @@ kex.o: includes.h config.h defines.h platform.h openbsd-compat/openbsd-compat.h
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kex.o: misc.h monitor.h ssherr.h sshbuf.h digest.h
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kexc25519.o: includes.h config.h defines.h platform.h openbsd-compat/openbsd-compat.h openbsd-compat/base64.h openbsd-compat/sigact.h openbsd-compat/readpassphrase.h openbsd-compat/vis.h openbsd-compat/getrrsetbyname.h openbsd-compat/sha1.h openbsd-compat/sha2.h openbsd-compat/rmd160.h openbsd-compat/md5.h openbsd-compat/blf.h openbsd-compat/getopt.h openbsd-compat/bsd-misc.h openbsd-compat/bsd-setres_id.h openbsd-compat/bsd-signal.h openbsd-compat/bsd-statvfs.h openbsd-compat/bsd-waitpid.h openbsd-compat/bsd-poll.h openbsd-compat/fake-rfc2553.h openbsd-compat/bsd-cygwin_util.h openbsd-compat/port-aix.h openbsd-compat/port-irix.h openbsd-compat/port-linux.h openbsd-compat/port-solaris.h openbsd-compat/port-net.h openbsd-compat/port-uw.h openbsd-compat/bsd-nextstep.h entropy.h sshkey.h kex.h mac.h crypto_api.h sshbuf.h digest.h ssherr.h ssh2.h
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kexdh.o: includes.h config.h defines.h platform.h openbsd-compat/openbsd-compat.h openbsd-compat/base64.h openbsd-compat/sigact.h openbsd-compat/readpassphrase.h openbsd-compat/vis.h openbsd-compat/getrrsetbyname.h openbsd-compat/sha1.h openbsd-compat/sha2.h openbsd-compat/rmd160.h openbsd-compat/md5.h openbsd-compat/blf.h openbsd-compat/getopt.h openbsd-compat/bsd-misc.h openbsd-compat/bsd-setres_id.h openbsd-compat/bsd-signal.h openbsd-compat/bsd-statvfs.h openbsd-compat/bsd-waitpid.h openbsd-compat/bsd-poll.h openbsd-compat/fake-rfc2553.h openbsd-compat/bsd-cygwin_util.h openbsd-compat/port-aix.h openbsd-compat/port-irix.h openbsd-compat/port-linux.h openbsd-compat/port-solaris.h openbsd-compat/port-net.h openbsd-compat/port-uw.h openbsd-compat/bsd-nextstep.h entropy.h
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kexecdh.o: includes.h config.h defines.h platform.h openbsd-compat/openbsd-compat.h openbsd-compat/base64.h openbsd-compat/sigact.h openbsd-compat/readpassphrase.h openbsd-compat/vis.h openbsd-compat/getrrsetbyname.h openbsd-compat/sha1.h openbsd-compat/sha2.h openbsd-compat/rmd160.h openbsd-compat/md5.h openbsd-compat/blf.h openbsd-compat/getopt.h openbsd-compat/bsd-misc.h openbsd-compat/bsd-setres_id.h openbsd-compat/bsd-signal.h openbsd-compat/bsd-statvfs.h openbsd-compat/bsd-waitpid.h openbsd-compat/bsd-poll.h openbsd-compat/fake-rfc2553.h openbsd-compat/bsd-cygwin_util.h openbsd-compat/port-aix.h openbsd-compat/port-irix.h openbsd-compat/port-linux.h openbsd-compat/port-solaris.h openbsd-compat/port-net.h openbsd-compat/port-uw.h openbsd-compat/bsd-nextstep.h entropy.h
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kexecdh.o: includes.h config.h defines.h platform.h openbsd-compat/openbsd-compat.h openbsd-compat/base64.h openbsd-compat/sigact.h openbsd-compat/readpassphrase.h openbsd-compat/vis.h openbsd-compat/getrrsetbyname.h openbsd-compat/sha1.h openbsd-compat/sha2.h openbsd-compat/rmd160.h openbsd-compat/md5.h openbsd-compat/blf.h openbsd-compat/getopt.h openbsd-compat/bsd-misc.h openbsd-compat/bsd-setres_id.h openbsd-compat/bsd-signal.h openbsd-compat/bsd-statvfs.h openbsd-compat/bsd-waitpid.h openbsd-compat/bsd-poll.h openbsd-compat/fake-rfc2553.h openbsd-compat/bsd-cygwin_util.h openbsd-compat/port-aix.h openbsd-compat/port-irix.h openbsd-compat/port-linux.h openbsd-compat/port-solaris.h openbsd-compat/port-net.h openbsd-compat/port-uw.h openbsd-compat/bsd-nextstep.h entropy.h sshkey.h kex.h mac.h crypto_api.h ssherr.h
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kexgen.o: includes.h config.h defines.h platform.h openbsd-compat/openbsd-compat.h openbsd-compat/base64.h openbsd-compat/sigact.h openbsd-compat/readpassphrase.h openbsd-compat/vis.h openbsd-compat/getrrsetbyname.h openbsd-compat/sha1.h openbsd-compat/sha2.h openbsd-compat/rmd160.h openbsd-compat/md5.h openbsd-compat/blf.h openbsd-compat/getopt.h openbsd-compat/bsd-misc.h openbsd-compat/bsd-setres_id.h openbsd-compat/bsd-signal.h openbsd-compat/bsd-statvfs.h openbsd-compat/bsd-waitpid.h openbsd-compat/bsd-poll.h openbsd-compat/fake-rfc2553.h openbsd-compat/bsd-cygwin_util.h openbsd-compat/port-aix.h openbsd-compat/port-irix.h openbsd-compat/port-linux.h openbsd-compat/port-solaris.h openbsd-compat/port-net.h openbsd-compat/port-uw.h openbsd-compat/bsd-nextstep.h entropy.h sshkey.h kex.h mac.h crypto_api.h log.h packet.h openbsd-compat/sys-queue.h dispatch.h ssh2.h sshbuf.h digest.h ssherr.h
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kexgex.o: includes.h config.h defines.h platform.h openbsd-compat/openbsd-compat.h openbsd-compat/base64.h openbsd-compat/sigact.h openbsd-compat/readpassphrase.h openbsd-compat/vis.h openbsd-compat/getrrsetbyname.h openbsd-compat/sha1.h openbsd-compat/sha2.h openbsd-compat/rmd160.h openbsd-compat/md5.h openbsd-compat/blf.h openbsd-compat/getopt.h openbsd-compat/bsd-misc.h openbsd-compat/bsd-setres_id.h openbsd-compat/bsd-signal.h openbsd-compat/bsd-statvfs.h openbsd-compat/bsd-waitpid.h openbsd-compat/bsd-poll.h openbsd-compat/fake-rfc2553.h openbsd-compat/bsd-cygwin_util.h openbsd-compat/port-aix.h openbsd-compat/port-irix.h openbsd-compat/port-linux.h openbsd-compat/port-solaris.h openbsd-compat/port-net.h openbsd-compat/port-uw.h openbsd-compat/bsd-nextstep.h entropy.h
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kexgexc.o: includes.h config.h defines.h platform.h openbsd-compat/openbsd-compat.h openbsd-compat/base64.h openbsd-compat/sigact.h openbsd-compat/readpassphrase.h openbsd-compat/vis.h openbsd-compat/getrrsetbyname.h openbsd-compat/sha1.h openbsd-compat/sha2.h openbsd-compat/rmd160.h openbsd-compat/md5.h openbsd-compat/blf.h openbsd-compat/getopt.h openbsd-compat/bsd-misc.h openbsd-compat/bsd-setres_id.h openbsd-compat/bsd-signal.h openbsd-compat/bsd-statvfs.h openbsd-compat/bsd-waitpid.h openbsd-compat/bsd-poll.h openbsd-compat/fake-rfc2553.h openbsd-compat/bsd-cygwin_util.h openbsd-compat/port-aix.h openbsd-compat/port-irix.h openbsd-compat/port-linux.h openbsd-compat/port-solaris.h openbsd-compat/port-net.h openbsd-compat/port-uw.h openbsd-compat/bsd-nextstep.h entropy.h
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@ -151,7 +151,7 @@ sshd.o: includes.h config.h defines.h platform.h openbsd-compat/openbsd-compat.h
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sshd.o: cipher-aesctr.h rijndael.h digest.h sshkey.h kex.h mac.h crypto_api.h myproposal.h authfile.h pathnames.h atomicio.h canohost.h hostfile.h auth.h auth-pam.h audit.h loginrec.h authfd.h msg.h channels.h session.h monitor.h monitor_wrap.h ssh-sandbox.h auth-options.h version.h ssherr.h
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ssherr.o: ssherr.h
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sshkey-xmss.o: includes.h config.h defines.h platform.h openbsd-compat/openbsd-compat.h openbsd-compat/base64.h openbsd-compat/sigact.h openbsd-compat/readpassphrase.h openbsd-compat/vis.h openbsd-compat/getrrsetbyname.h openbsd-compat/sha1.h openbsd-compat/sha2.h openbsd-compat/rmd160.h openbsd-compat/md5.h openbsd-compat/blf.h openbsd-compat/getopt.h openbsd-compat/bsd-misc.h openbsd-compat/bsd-setres_id.h openbsd-compat/bsd-signal.h openbsd-compat/bsd-statvfs.h openbsd-compat/bsd-waitpid.h openbsd-compat/bsd-poll.h openbsd-compat/fake-rfc2553.h openbsd-compat/bsd-cygwin_util.h openbsd-compat/port-aix.h openbsd-compat/port-irix.h openbsd-compat/port-linux.h openbsd-compat/port-solaris.h openbsd-compat/port-net.h openbsd-compat/port-uw.h openbsd-compat/bsd-nextstep.h entropy.h
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sshkey.o: includes.h config.h defines.h platform.h openbsd-compat/openbsd-compat.h openbsd-compat/base64.h openbsd-compat/sigact.h openbsd-compat/readpassphrase.h openbsd-compat/vis.h openbsd-compat/getrrsetbyname.h openbsd-compat/sha1.h openbsd-compat/sha2.h openbsd-compat/rmd160.h openbsd-compat/md5.h openbsd-compat/blf.h openbsd-compat/getopt.h openbsd-compat/bsd-misc.h openbsd-compat/bsd-setres_id.h openbsd-compat/bsd-signal.h openbsd-compat/bsd-statvfs.h openbsd-compat/bsd-waitpid.h openbsd-compat/bsd-poll.h openbsd-compat/fake-rfc2553.h openbsd-compat/bsd-cygwin_util.h openbsd-compat/port-aix.h openbsd-compat/port-irix.h openbsd-compat/port-linux.h openbsd-compat/port-solaris.h openbsd-compat/port-net.h openbsd-compat/port-uw.h openbsd-compat/bsd-nextstep.h entropy.h crypto_api.h ssh2.h ssherr.h misc.h sshbuf.h cipher.h cipher-chachapoly.h chacha.h poly1305.h cipher-aesctr.h rijndael.h digest.h sshkey.h sshkey-xmss.h match.h xmss_fast.h openbsd-compat/openssl-compat.h
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sshkey.o: includes.h config.h defines.h platform.h openbsd-compat/openbsd-compat.h openbsd-compat/base64.h openbsd-compat/sigact.h openbsd-compat/readpassphrase.h openbsd-compat/vis.h openbsd-compat/getrrsetbyname.h openbsd-compat/sha1.h openbsd-compat/sha2.h openbsd-compat/rmd160.h openbsd-compat/md5.h openbsd-compat/blf.h openbsd-compat/getopt.h openbsd-compat/bsd-misc.h openbsd-compat/bsd-setres_id.h openbsd-compat/bsd-signal.h openbsd-compat/bsd-statvfs.h openbsd-compat/bsd-waitpid.h openbsd-compat/bsd-poll.h openbsd-compat/fake-rfc2553.h openbsd-compat/bsd-cygwin_util.h openbsd-compat/port-aix.h openbsd-compat/port-irix.h openbsd-compat/port-linux.h openbsd-compat/port-solaris.h openbsd-compat/port-net.h openbsd-compat/port-uw.h openbsd-compat/bsd-nextstep.h entropy.h crypto_api.h ssh2.h ssherr.h misc.h sshbuf.h cipher.h cipher-chachapoly.h chacha.h poly1305.h cipher-aesctr.h rijndael.h digest.h sshkey.h match.h openbsd-compat/openssl-compat.h
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sshlogin.o: includes.h config.h defines.h platform.h openbsd-compat/openbsd-compat.h openbsd-compat/base64.h openbsd-compat/sigact.h openbsd-compat/readpassphrase.h openbsd-compat/vis.h openbsd-compat/getrrsetbyname.h openbsd-compat/sha1.h openbsd-compat/sha2.h openbsd-compat/rmd160.h openbsd-compat/md5.h openbsd-compat/blf.h openbsd-compat/getopt.h openbsd-compat/bsd-misc.h openbsd-compat/bsd-setres_id.h openbsd-compat/bsd-signal.h openbsd-compat/bsd-statvfs.h openbsd-compat/bsd-waitpid.h openbsd-compat/bsd-poll.h openbsd-compat/fake-rfc2553.h openbsd-compat/bsd-cygwin_util.h openbsd-compat/port-aix.h openbsd-compat/port-irix.h openbsd-compat/port-linux.h openbsd-compat/port-solaris.h openbsd-compat/port-net.h openbsd-compat/port-uw.h openbsd-compat/bsd-nextstep.h entropy.h sshlogin.h ssherr.h loginrec.h log.h sshbuf.h misc.h servconf.h
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sshpty.o: includes.h config.h defines.h platform.h openbsd-compat/openbsd-compat.h openbsd-compat/base64.h openbsd-compat/sigact.h openbsd-compat/readpassphrase.h openbsd-compat/vis.h openbsd-compat/getrrsetbyname.h openbsd-compat/sha1.h openbsd-compat/sha2.h openbsd-compat/rmd160.h openbsd-compat/md5.h openbsd-compat/blf.h openbsd-compat/getopt.h openbsd-compat/bsd-misc.h openbsd-compat/bsd-setres_id.h openbsd-compat/bsd-signal.h openbsd-compat/bsd-statvfs.h openbsd-compat/bsd-waitpid.h openbsd-compat/bsd-poll.h openbsd-compat/fake-rfc2553.h openbsd-compat/bsd-cygwin_util.h openbsd-compat/port-aix.h openbsd-compat/port-irix.h openbsd-compat/port-linux.h openbsd-compat/port-solaris.h openbsd-compat/port-net.h openbsd-compat/port-uw.h openbsd-compat/bsd-nextstep.h entropy.h sshpty.h log.h misc.h
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sshtty.o: includes.h config.h defines.h platform.h openbsd-compat/openbsd-compat.h openbsd-compat/base64.h openbsd-compat/sigact.h openbsd-compat/readpassphrase.h openbsd-compat/vis.h openbsd-compat/getrrsetbyname.h openbsd-compat/sha1.h openbsd-compat/sha2.h openbsd-compat/rmd160.h openbsd-compat/md5.h openbsd-compat/blf.h openbsd-compat/getopt.h openbsd-compat/bsd-misc.h openbsd-compat/bsd-setres_id.h openbsd-compat/bsd-signal.h openbsd-compat/bsd-statvfs.h openbsd-compat/bsd-waitpid.h openbsd-compat/bsd-poll.h openbsd-compat/fake-rfc2553.h openbsd-compat/bsd-cygwin_util.h openbsd-compat/port-aix.h openbsd-compat/port-irix.h openbsd-compat/port-linux.h openbsd-compat/port-solaris.h openbsd-compat/port-net.h openbsd-compat/port-uw.h openbsd-compat/bsd-nextstep.h entropy.h sshpty.h
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@ -197,7 +197,7 @@ ssh-keyscan$(EXEEXT): $(LIBCOMPAT) libssh.a ssh-keyscan.o
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$(LD) -o $@ ssh-keyscan.o $(LDFLAGS) -lssh -lopenbsd-compat -lssh $(LIBS)
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sftp-server$(EXEEXT): $(LIBCOMPAT) libssh.a sftp.o sftp-common.o sftp-server.o sftp-realpath.o sftp-server-main.o
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$(LD) -o $@ sftp-server.o sftp-common.o sftp-server-main.o $(LDFLAGS) -lssh -lopenbsd-compat $(LIBS)
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$(LD) -o $@ sftp-server.o sftp-common.o sftp-realpath.o sftp-server-main.o $(LDFLAGS) -lssh -lopenbsd-compat $(LIBS)
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sftp$(EXEEXT): $(LIBCOMPAT) libssh.a sftp.o sftp-client.o sftp-common.o sftp-glob.o progressmeter.o
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$(LD) -o $@ progressmeter.o sftp.o sftp-client.o sftp-common.o sftp-glob.o $(LDFLAGS) -lssh -lopenbsd-compat $(LIBS) $(LIBEDIT)
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28
configure.ac
28
configure.ac
@ -588,7 +588,6 @@ case "$host" in
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#include <fcntl.h> ]
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)
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check_for_aix_broken_getaddrinfo=1
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AC_DEFINE([BROKEN_REALPATH], [1], [Define if you have a broken realpath.])
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AC_DEFINE([SETEUID_BREAKS_SETUID], [1],
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[Define if your platform breaks doing a seteuid before a setuid])
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AC_DEFINE([BROKEN_SETREUID], [1], [Define if your setreuid() is broken])
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@ -948,7 +947,6 @@ mips-sony-bsd|mips-sony-newsos4)
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conf_wtmp_location=/usr/adm/wtmp
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maildir=/usr/spool/mail
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AC_DEFINE([HAVE_NEXT], [1], [Define if you are on NeXT])
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AC_DEFINE([BROKEN_REALPATH])
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AC_DEFINE([USE_PIPES])
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AC_DEFINE([BROKEN_SAVED_UIDS], [1], [Needed for NeXT])
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;;
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@ -2024,32 +2022,6 @@ AC_CHECK_FUNCS([setresgid], [
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)
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])
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AC_CHECK_FUNCS([realpath], [
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dnl the sftp v3 spec says SSH_FXP_REALPATH will "canonicalize any given
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dnl path name", however some implementations of realpath (and some
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dnl versions of the POSIX spec) do not work on non-existent files,
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dnl so we use the OpenBSD implementation on those platforms.
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AC_MSG_CHECKING([if realpath works with non-existent files])
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AC_RUN_IFELSE(
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[AC_LANG_PROGRAM([[
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#include <limits.h>
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#include <stdlib.h>
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#include <errno.h>
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]], [[
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char buf[PATH_MAX];
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if (realpath("/opensshnonexistentfilename1234", buf) == NULL)
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if (errno == ENOENT)
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exit(1);
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exit(0);
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]])],
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[AC_MSG_RESULT([yes])],
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[AC_DEFINE([BROKEN_REALPATH], [1],
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[realpath does not work with nonexistent files])
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AC_MSG_RESULT([no])],
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[AC_MSG_WARN([cross compiling: assuming working])]
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)
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])
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AC_MSG_CHECKING([for working fflush(NULL)])
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AC_RUN_IFELSE(
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[AC_LANG_PROGRAM([[#include <stdio.h>]], [[fflush(NULL); exit(0);]])],
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@ -108,10 +108,6 @@ enum
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# define MAXPATHLEN PATH_MAX
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# else /* PATH_MAX */
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# define MAXPATHLEN 64
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/* realpath uses a fixed buffer of size MAXPATHLEN, so force use of ours */
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# ifndef BROKEN_REALPATH
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# define BROKEN_REALPATH 1
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# endif /* BROKEN_REALPATH */
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# endif /* PATH_MAX */
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#endif /* MAXPATHLEN */
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@ -38,7 +38,6 @@ OPENBSD=base64.o \
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pwcache.o \
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readpassphrase.o \
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reallocarray.o \
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realpath.o \
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recallocarray.o \
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rmd160.o \
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rresvport.o \
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@ -81,18 +81,6 @@ void *reallocarray(void *, size_t, size_t);
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void *recallocarray(void *, size_t, size_t, size_t);
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#endif
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#if !defined(HAVE_REALPATH) || defined(BROKEN_REALPATH)
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/*
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* glibc's FORTIFY_SOURCE can redefine this and prevent us picking up the
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* compat version.
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*/
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# ifdef BROKEN_REALPATH
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# define realpath(x, y) _ssh_compat_realpath(x, y)
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# endif
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char *realpath(const char *path, char *resolved);
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#endif
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#ifndef HAVE_RRESVPORT_AF
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int rresvport_af(int *alport, sa_family_t af);
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#endif
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@ -1,229 +0,0 @@
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/* $OpenBSD: realpath.c,v 1.20 2015/10/13 20:55:37 millert Exp $ */
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/*
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* Copyright (c) 2003 Constantin S. Svintsoff <kostik@iclub.nsu.ru>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
|
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* OPENBSD ORIGINAL: lib/libc/stdlib/realpath.c */
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#include "includes.h"
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#if !defined(HAVE_REALPATH) || defined(BROKEN_REALPATH)
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <string.h>
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#include <unistd.h>
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#include <limits.h>
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#ifndef SYMLOOP_MAX
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# define SYMLOOP_MAX 32
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#endif
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/* A slightly modified copy of this file exists in libexec/ld.so */
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/*
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* char *realpath(const char *path, char resolved[PATH_MAX]);
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*
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* Find the real name of path, by removing all ".", ".." and symlink
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* components. Returns (resolved) on success, or (NULL) on failure,
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* in which case the path which caused trouble is left in (resolved).
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*/
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char *
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realpath(const char *path, char *resolved)
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{
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struct stat sb;
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char *p, *q, *s;
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size_t left_len, resolved_len;
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unsigned symlinks;
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int serrno, slen, mem_allocated;
|
||||
char left[PATH_MAX], next_token[PATH_MAX], symlink[PATH_MAX];
|
||||
|
||||
if (path[0] == '\0') {
|
||||
errno = ENOENT;
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
serrno = errno;
|
||||
|
||||
if (resolved == NULL) {
|
||||
resolved = malloc(PATH_MAX);
|
||||
if (resolved == NULL)
|
||||
return (NULL);
|
||||
mem_allocated = 1;
|
||||
} else
|
||||
mem_allocated = 0;
|
||||
|
||||
symlinks = 0;
|
||||
if (path[0] == '/') {
|
||||
resolved[0] = '/';
|
||||
resolved[1] = '\0';
|
||||
if (path[1] == '\0')
|
||||
return (resolved);
|
||||
resolved_len = 1;
|
||||
left_len = strlcpy(left, path + 1, sizeof(left));
|
||||
} else {
|
||||
if (getcwd(resolved, PATH_MAX) == NULL) {
|
||||
if (mem_allocated)
|
||||
free(resolved);
|
||||
else
|
||||
strlcpy(resolved, ".", PATH_MAX);
|
||||
return (NULL);
|
||||
}
|
||||
resolved_len = strlen(resolved);
|
||||
left_len = strlcpy(left, path, sizeof(left));
|
||||
}
|
||||
if (left_len >= sizeof(left) || resolved_len >= PATH_MAX) {
|
||||
errno = ENAMETOOLONG;
|
||||
goto err;
|
||||
}
|
||||
|
||||
/*
|
||||
* Iterate over path components in `left'.
|
||||
*/
|
||||
while (left_len != 0) {
|
||||
/*
|
||||
* Extract the next path component and adjust `left'
|
||||
* and its length.
|
||||
*/
|
||||
p = strchr(left, '/');
|
||||
s = p ? p : left + left_len;
|
||||
if (s - left >= (ptrdiff_t)sizeof(next_token)) {
|
||||
errno = ENAMETOOLONG;
|
||||
goto err;
|
||||
}
|
||||
memcpy(next_token, left, s - left);
|
||||
next_token[s - left] = '\0';
|
||||
left_len -= s - left;
|
||||
if (p != NULL)
|
||||
memmove(left, s + 1, left_len + 1);
|
||||
if (resolved[resolved_len - 1] != '/') {
|
||||
if (resolved_len + 1 >= PATH_MAX) {
|
||||
errno = ENAMETOOLONG;
|
||||
goto err;
|
||||
}
|
||||
resolved[resolved_len++] = '/';
|
||||
resolved[resolved_len] = '\0';
|
||||
}
|
||||
if (next_token[0] == '\0')
|
||||
continue;
|
||||
else if (strcmp(next_token, ".") == 0)
|
||||
continue;
|
||||
else if (strcmp(next_token, "..") == 0) {
|
||||
/*
|
||||
* Strip the last path component except when we have
|
||||
* single "/"
|
||||
*/
|
||||
if (resolved_len > 1) {
|
||||
resolved[resolved_len - 1] = '\0';
|
||||
q = strrchr(resolved, '/') + 1;
|
||||
*q = '\0';
|
||||
resolved_len = q - resolved;
|
||||
}
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
* Append the next path component and lstat() it. If
|
||||
* lstat() fails we still can return successfully if
|
||||
* there are no more path components left.
|
||||
*/
|
||||
resolved_len = strlcat(resolved, next_token, PATH_MAX);
|
||||
if (resolved_len >= PATH_MAX) {
|
||||
errno = ENAMETOOLONG;
|
||||
goto err;
|
||||
}
|
||||
if (lstat(resolved, &sb) != 0) {
|
||||
if (errno == ENOENT && p == NULL) {
|
||||
errno = serrno;
|
||||
return (resolved);
|
||||
}
|
||||
goto err;
|
||||
}
|
||||
if (S_ISLNK(sb.st_mode)) {
|
||||
if (symlinks++ > SYMLOOP_MAX) {
|
||||
errno = ELOOP;
|
||||
goto err;
|
||||
}
|
||||
slen = readlink(resolved, symlink, sizeof(symlink) - 1);
|
||||
if (slen < 0)
|
||||
goto err;
|
||||
symlink[slen] = '\0';
|
||||
if (symlink[0] == '/') {
|
||||
resolved[1] = 0;
|
||||
resolved_len = 1;
|
||||
} else if (resolved_len > 1) {
|
||||
/* Strip the last path component. */
|
||||
resolved[resolved_len - 1] = '\0';
|
||||
q = strrchr(resolved, '/') + 1;
|
||||
*q = '\0';
|
||||
resolved_len = q - resolved;
|
||||
}
|
||||
|
||||
/*
|
||||
* If there are any path components left, then
|
||||
* append them to symlink. The result is placed
|
||||
* in `left'.
|
||||
*/
|
||||
if (p != NULL) {
|
||||
if (symlink[slen - 1] != '/') {
|
||||
if (slen + 1 >=
|
||||
(ptrdiff_t)sizeof(symlink)) {
|
||||
errno = ENAMETOOLONG;
|
||||
goto err;
|
||||
}
|
||||
symlink[slen] = '/';
|
||||
symlink[slen + 1] = 0;
|
||||
}
|
||||
left_len = strlcat(symlink, left, sizeof(symlink));
|
||||
if (left_len >= sizeof(symlink)) {
|
||||
errno = ENAMETOOLONG;
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
left_len = strlcpy(left, symlink, sizeof(left));
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Remove trailing slash except when the resolved pathname
|
||||
* is a single "/".
|
||||
*/
|
||||
if (resolved_len > 1 && resolved[resolved_len - 1] == '/')
|
||||
resolved[resolved_len - 1] = '\0';
|
||||
return (resolved);
|
||||
|
||||
err:
|
||||
if (mem_allocated)
|
||||
free(resolved);
|
||||
return (NULL);
|
||||
}
|
||||
#endif /* !defined(HAVE_REALPATH) || defined(BROKEN_REALPATH) */
|
||||
Loading…
Reference in New Issue
Block a user