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Date: Fri, 1 Sep 2017 18:52:52 +0200
From: Phil Sutter <phil@....cc>
To: Stephen Hemminger <stephen@...workplumber.org>
Cc: netdev@...r.kernel.org
Subject: [iproute PATCH 2/6] Convert the obvious cases to strlcpy()
This converts the typical idiom of manually terminating the buffer after
a call to strncpy().
Signed-off-by: Phil Sutter <phil@....cc>
---
ip/ipnetns.c | 3 +--
ip/iproute_lwtunnel.c | 3 +--
ip/ipvrf.c | 3 +--
lib/bpf.c | 3 +--
lib/fs.c | 3 +--
lib/inet_proto.c | 3 +--
misc/ss.c | 3 +--
tc/em_ipset.c | 3 +--
8 files changed, 8 insertions(+), 16 deletions(-)
diff --git a/ip/ipnetns.c b/ip/ipnetns.c
index 9ee1fe6a51f9c..afb4978a5be7d 100644
--- a/ip/ipnetns.c
+++ b/ip/ipnetns.c
@@ -518,8 +518,7 @@ int netns_identify_pid(const char *pidstr, char *name, int len)
if ((st.st_dev == netst.st_dev) &&
(st.st_ino == netst.st_ino)) {
- strncpy(name, entry->d_name, len - 1);
- name[len - 1] = '\0';
+ strlcpy(name, entry->d_name, len);
}
}
closedir(dir);
diff --git a/ip/iproute_lwtunnel.c b/ip/iproute_lwtunnel.c
index 1a3dc4d4c0ed9..4c2d3b07e3b5c 100644
--- a/ip/iproute_lwtunnel.c
+++ b/ip/iproute_lwtunnel.c
@@ -325,8 +325,7 @@ static int parse_encap_seg6(struct rtattr *rta, size_t len, int *argcp,
invarg("\"segs\" provided before \"mode\"\n",
*argv);
- strncpy(segbuf, *argv, 1024);
- segbuf[1023] = 0;
+ strlcpy(segbuf, *argv, 1024);
} else if (strcmp(*argv, "hmac") == 0) {
NEXT_ARG();
if (hmac_ok++)
diff --git a/ip/ipvrf.c b/ip/ipvrf.c
index e6fad32abd956..b74c501e0970c 100644
--- a/ip/ipvrf.c
+++ b/ip/ipvrf.c
@@ -336,8 +336,7 @@ static int vrf_path(char *vpath, size_t len)
if (vrf)
*vrf = '\0';
- strncpy(vpath, start, len - 1);
- vpath[len - 1] = '\0';
+ strlcpy(vpath, start, len);
/* if vrf path is just / then return nothing */
if (!strcmp(vpath, "/"))
diff --git a/lib/bpf.c b/lib/bpf.c
index 0bd0a95eafe6c..c180934acc7dc 100644
--- a/lib/bpf.c
+++ b/lib/bpf.c
@@ -512,8 +512,7 @@ static const char *bpf_find_mntpt_single(unsigned long magic, char *mnt,
ret = bpf_valid_mntpt(mntpt, magic);
if (!ret) {
- strncpy(mnt, mntpt, len - 1);
- mnt[len - 1] = 0;
+ strlcpy(mnt, mntpt, len);
return mnt;
}
diff --git a/lib/fs.c b/lib/fs.c
index ebe05cd44e11b..86efd4ed2ed80 100644
--- a/lib/fs.c
+++ b/lib/fs.c
@@ -172,8 +172,7 @@ int get_command_name(const char *pid, char *comm, size_t len)
if (nl)
*nl = '\0';
- strncpy(comm, name, len - 1);
- comm[len - 1] = '\0';
+ strlcpy(comm, name, len);
break;
}
diff --git a/lib/inet_proto.c b/lib/inet_proto.c
index 53c029039b6d5..bdfd52fdafe5a 100644
--- a/lib/inet_proto.c
+++ b/lib/inet_proto.c
@@ -38,8 +38,7 @@ const char *inet_proto_n2a(int proto, char *buf, int len)
free(ncache);
icache = proto;
ncache = strdup(pe->p_name);
- strncpy(buf, pe->p_name, len - 1);
- buf[len - 1] = '\0';
+ strlcpy(buf, pe->p_name, len);
return buf;
}
snprintf(buf, len, "ipproto-%d", proto);
diff --git a/misc/ss.c b/misc/ss.c
index 2c9e80e696595..dd8dfaa4e70db 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -425,8 +425,7 @@ static void user_ent_hash_build(void)
user_ent_hash_build_init = 1;
- strncpy(name, root, sizeof(name)-1);
- name[sizeof(name)-1] = 0;
+ strlcpy(name, root, sizeof(name));
if (strlen(name) == 0 || name[strlen(name)-1] != '/')
strcat(name, "/");
diff --git a/tc/em_ipset.c b/tc/em_ipset.c
index b59756515d239..48b287f5ba3b2 100644
--- a/tc/em_ipset.c
+++ b/tc/em_ipset.c
@@ -145,8 +145,7 @@ get_set_byname(const char *setname, struct xt_set_info *info)
int res;
req.op = IP_SET_OP_GET_BYNAME;
- strncpy(req.set.name, setname, IPSET_MAXNAMELEN);
- req.set.name[IPSET_MAXNAMELEN - 1] = '\0';
+ strlcpy(req.set.name, setname, IPSET_MAXNAMELEN);
res = do_getsockopt(&req);
if (res != 0)
return -1;
--
2.13.1
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