Fix linknamespace errors and local-plt-usages in nss_files.

After commit f9c8b11ed7726b858cd7b7cea0d3d7c5233d78cf
"nss: Access nss_files through direct references",
when building with -Os, multiple conform/.../linknamespace tests
and elf/check-localplt are failing:
Extra PLT reference: libc.so: fgetc_unlocked
Extra PLT reference: libc.so: getline

Or e.g.:
[initial] glob -> [libc.a(glob.o)] __getpwnam_r -> [libc.a(getpwnam_r.o)] __nss_database_custom -> [libc.a(nsswitch.o)] __nss_module_get_function -> [libc.a(nss_module.o)] __nss_files_functions -> [libc.a(nss_files_functions.o)] _nss_files_endaliasent -> [libc.a(files-alias.o)] feof_unlocked
[initial] glob -> [libc.a(glob.o)] __getpwnam_r -> [libc.a(getpwnam_r.o)] __nss_database_custom -> [libc.a(nsswitch.o)] __nss_module_get_function -> [libc.a(nss_module.o)] __nss_files_functions -> [libc.a(nss_files_functions.o)] _nss_files_endaliasent -> [libc.a(files-alias.o)] fgetc_unlocked
[initial] glob -> [libc.a(glob.o)] __getpwnam_r -> [libc.a(getpwnam_r.o)] __nss_database_custom -> [libc.a(nsswitch.o)] __nss_module_get_function -> [libc.a(nss_module.o)] __nss_files_functions -> [libc.a(nss_files_functions.o)] _nss_files_endnetgrent -> [libc.a(files-netgrp.o)] getline

This patch is using the hidden symbols where possible.
Instead of fputc_unlocked, __putc_unlocked is used.
(Compare to commit eeaa19f75e52d2d48074ae0c423f2311d67c42c6
"mntent: Use __putc_unlocked instead of fputc_unlocked")

1 files changed, 3 insertions, 3 deletions

diff --git a/nss/nss_files/files-netgrp.c b/nss/nss_files/files-netgrp.c
index 75bfbd9e44..82cc201b85 100644
--- a/nss/nss_files/files-netgrp.c
+++ b/nss/nss_files/files-netgrp.c
@@ -77,9 +77,9 @@ _nss_files_setnetgrent (const char *group, struct __netgrent *result)
       status = NSS_STATUS_NOTFOUND;
       result->cursor = result->data;
 
-      while (!feof_unlocked (fp))
+      while (!__feof_unlocked (fp))
 	{
-	  ssize_t curlen = getline (&line, &line_len, fp);
+	  ssize_t curlen = __getline (&line, &line_len, fp);
 	  int found;
 
 	  if (curlen < 0)
@@ -111,7 +111,7 @@ _nss_files_setnetgrent (const char *group, struct __netgrent *result)
 		result->cursor -= 2;
 
 	      /* Get next line.  */
-	      curlen = getline (&line, &line_len, fp);
+	      curlen = __getline (&line, &line_len, fp);
 	      if (curlen <= 0)
 		break;