tc: fix bpf compilation with old glibc

Error was:
f_bpf.o: In function `bpf_parse_opt':
f_bpf.c:(.text+0x88f): undefined reference to `secure_getenv'
m_bpf.o: In function `parse_bpf':
m_bpf.c:(.text+0x587): undefined reference to `secure_getenv'
collect2: error: ld returned 1 exit status

There is no special reason to use the secure version of getenv, thus let's
simply use getenv().

CC: Daniel Borkmann <daniel@iogearbox.net>
Fixes: 88eea5395483 ("tc: {f,m}_bpf: allow to retrieve uds path from env")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Tested-by: Yegor Yefremov <yegorslists@googlemail.com>

2 files changed, 2 insertions, 2 deletions

diff --git a/tc/f_bpf.c b/tc/f_bpf.c
index c21bf33f..490dc6b4 100644
--- a/tc/f_bpf.c
+++ b/tc/f_bpf.c
@@ -122,7 +122,7 @@ opt_bpf:
 
 			NEXT_ARG();
 			if (ebpf) {
-				bpf_uds_name = secure_getenv(BPF_ENV_UDS);
+				bpf_uds_name = getenv(BPF_ENV_UDS);
 				bpf_obj = *argv;
 				NEXT_ARG();
 
diff --git a/tc/m_bpf.c b/tc/m_bpf.c
index 9ddb6672..c51f44fc 100644
--- a/tc/m_bpf.c
+++ b/tc/m_bpf.c
@@ -105,7 +105,7 @@ opt_bpf:
 
 			NEXT_ARG();
 			if (ebpf) {
-				bpf_uds_name = secure_getenv(BPF_ENV_UDS);
+				bpf_uds_name = getenv(BPF_ENV_UDS);
 				bpf_obj = *argv;
 				NEXT_ARG();