errno: use consistently

* lib/c-stack.c (ENOTSUP): <errno.h> guarantees a definition.
* lib/canonicalize-lgpl.c (ENAMETOOLONG): Likewise.
* lib/canonicalize.c (ELOOP): Likewise.
* lib/inet_ntop.c (EAFNOSUPPORT): Likewise.
* lib/inet_pton.c (EAFNOSUPPORT): Likewise.
* lib/lchown.c (EOPNOTSUPP): Likewise.
* lib/openat-priv.h (ENOSYS, EOPNOTSUPP): Likewise.
* lib/savewd.c (ESTALE): Likewise.
* lib/settime.c (ENOSYS): Likewise.
* lib/utimens.c (ENOSYS): Likewise.
* lib/xgethostname.c (ENAMETOOLONG): Likewise.
* lib/chdir-safer.c (ELOOP): Likewise.
(chdir_no_follow): Use HAVE_READLINK, not ELOOP, as witness.
* modules/c-stack (Depends-on): Add errno.
* modules/canonicalize (Depends-on): Likewise.
* modules/chdir-safer (Depends-on): Likewise.
* modules/fdopendir (Depends-on): Likewise.
* modules/inet_ntop (Depends-on): Likewise.
* modules/inet_pton (Depends-on): Likewise.
* modules/lchown (Depends-on): Likewise.
* modules/openat (Depends-on): Likewise.
* modules/savewd (Depends-on): Likewise.
* modules/settime (Depends-on): Likewise.
* m4/chdir-safer.m4 (gl_CHDIR_SAFER): Check for readlink.

Signed-off-by: Eric Blake <ebb9@byu.net>

11 files changed, 12 insertions, 1 deletions

diff --git a/modules/c-stack b/modules/c-stack
index 6a589c3145..22dd18c1af 100644
--- a/modules/c-stack
+++ b/modules/c-stack
@@ -8,6 +8,7 @@ m4/c-stack.m4
 
 Depends-on:
 gettext-h
+errno
 exitfail
 unistd
 raise
diff --git a/modules/canonicalize b/modules/canonicalize
index 23baa7594c..e24be3d177 100644
--- a/modules/canonicalize
+++ b/modules/canonicalize
@@ -9,6 +9,7 @@ m4/canonicalize.m4
 
 Depends-on:
 areadlink-with-size
+errno
 file-set
 filenamecat
 hash-triple
diff --git a/modules/chdir-safer b/modules/chdir-safer
index b3b47e16f6..39cfdc7f6b 100644
--- a/modules/chdir-safer
+++ b/modules/chdir-safer
@@ -7,6 +7,7 @@ lib/chdir-safer.c
 m4/chdir-safer.m4
 
 Depends-on:
+errno
 fchdir
 fcntl-h
 open
diff --git a/modules/fdopendir b/modules/fdopendir
index 7a90aa367f..83c2af7d32 100644
--- a/modules/fdopendir
+++ b/modules/fdopendir
@@ -8,8 +8,9 @@ lib/openat-proc.c
 m4/fdopendir.m4
 
 Depends-on:
-extensions
 dirent
+errno
+extensions
 fchdir
 openat-die
 save-cwd
diff --git a/modules/inet_ntop b/modules/inet_ntop
index 98df38e51c..76ff39da79 100644
--- a/modules/inet_ntop
+++ b/modules/inet_ntop
@@ -9,6 +9,7 @@ Depends-on:
 socklen
 sys_socket
 arpa_inet
+errno
 netinet_in
 extensions
 
diff --git a/modules/inet_pton b/modules/inet_pton
index 173710ab81..314bf0f9c2 100644
--- a/modules/inet_pton
+++ b/modules/inet_pton
@@ -10,6 +10,7 @@ c-ctype
 socklen
 sys_socket
 arpa_inet
+errno
 netinet_in
 extensions
 
diff --git a/modules/lchown b/modules/lchown
index e011e2bddb..65c084c933 100644
--- a/modules/lchown
+++ b/modules/lchown
@@ -7,6 +7,7 @@ m4/lchown.m4
 
 Depends-on:
 chown
+errno
 sys_stat
 unistd
 
diff --git a/modules/openat b/modules/openat
index 5c326a07d5..3ea5b4d7cc 100644
--- a/modules/openat
+++ b/modules/openat
@@ -16,6 +16,7 @@ m4/mode_t.m4
 
 Depends-on:
 dirname
+errno
 extensions
 fchdir
 fdopendir
diff --git a/modules/savewd b/modules/savewd
index 360d4b9a38..6d655c17e3 100644
--- a/modules/savewd
+++ b/modules/savewd
@@ -8,6 +8,7 @@ m4/savewd.m4
 
 Depends-on:
 dirname
+errno
 exit
 fchdir
 fcntl-safer
diff --git a/modules/settime b/modules/settime
index 9ca84a027e..f88318ed89 100644
--- a/modules/settime
+++ b/modules/settime
@@ -7,6 +7,7 @@ m4/settime.m4
 
 Depends-on:
 clock-time
+errno
 extensions
 sys_time
 timespec
diff --git a/modules/utimens b/modules/utimens
index caf8805d6a..425148521c 100644
--- a/modules/utimens
+++ b/modules/utimens
@@ -9,6 +9,7 @@ m4/utimens.m4
 m4/utimes.m4
 
 Depends-on:
+errno
 sys_time
 time