iproute2: improved error messages
This patch improves many error messages as follows:
- For incorrect parameters, show the value of the offending parameter, rather than just say that it is incorrect
- Rephrased messages for clarity
- Rephrased to more `mainstream' english
Signed-off-by: Kees van Reeuwijk <reeuwijk@few.vu.nl>
diff --git a/ip/ip6tunnel.c b/ip/ip6tunnel.c
index fcc9f33..216e982 100644
--- a/ip/ip6tunnel.c
+++ b/ip/ip6tunnel.c
@@ -128,7 +128,7 @@
strcmp(*argv, "any") == 0)
p->proto = 0;
else {
- fprintf(stderr,"Cannot guess tunnel mode.\n");
+ fprintf(stderr,"Unknown tunnel mode \"%s\"\n", *argv);
exit(-1);
}
} else if (strcmp(*argv, "remote") == 0) {
@@ -293,7 +293,7 @@
buf[sizeof(buf) - 1] = '\0';
if ((ptr = strchr(buf, ':')) == NULL ||
(*ptr++ = 0, sscanf(buf, "%s", name) != 1)) {
- fprintf(stderr, "Wrong format of /proc/net/dev. Sorry.\n");
+ fprintf(stderr, "Wrong format for /proc/net/dev. Giving up.\n");
goto end;
}
if (sscanf(ptr, "%ld%ld%ld%ld%ld%ld%ld%*d%ld%ld%ld%ld%ld%ld%ld",
@@ -309,7 +309,7 @@
continue;
type = ll_index_to_type(index);
if (type == -1) {
- fprintf(stderr, "Failed to get type of [%s]\n", name);
+ fprintf(stderr, "Failed to get type of \"%s\"\n", name);
continue;
}
if (type != ARPHRD_TUNNEL6)
@@ -402,7 +402,7 @@
case AF_INET6:
break;
default:
- fprintf(stderr, "Unsupported family:%d\n", preferred_family);
+ fprintf(stderr, "Unsupported protocol family: %d\n", preferred_family);
exit(-1);
}
diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 297506d..0bd8a76 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -785,7 +785,7 @@
int ret;
if (isatty(STDOUT_FILENO)) {
- fprintf(stderr, "Not sending binary stream to stdout\n");
+ fprintf(stderr, "Not sending a binary stream to stdout\n");
return -1;
}
diff --git a/ip/ipl2tp.c b/ip/ipl2tp.c
index f6e264a..2d22317 100644
--- a/ip/ipl2tp.c
+++ b/ip/ipl2tp.c
@@ -494,7 +494,7 @@
} else if (strcmp(*argv, "udp") == 0) {
p->encap = L2TP_ENCAPTYPE_UDP;
} else {
- fprintf(stderr, "Unknown tunnel encapsulation.\n");
+ fprintf(stderr, "Unknown tunnel encapsulation \"%s\"\n", *argv);
exit(-1);
}
} else if (strcmp(*argv, "name") == 0) {
diff --git a/ip/iplink.c b/ip/iplink.c
index 5ff8f85..c24f0ce 100644
--- a/ip/iplink.c
+++ b/ip/iplink.c
@@ -94,9 +94,9 @@
iplink_usage();
}
-static int on_off(char *msg)
+static int on_off(const char *msg, const char *realval)
{
- fprintf(stderr, "Error: argument of \"%s\" must be \"on\" or \"off\"\n", msg);
+ fprintf(stderr, "Error: argument of \"%s\" must be \"on\" or \"off\", not \"%s\"\n", msg, realval);
return -1;
}
@@ -348,7 +348,7 @@
} else if (strcmp(*argv, "off") == 0) {
req->i.ifi_flags &= ~IFF_MULTICAST;
} else
- return on_off("multicast");
+ return on_off("multicast", *argv);
} else if (strcmp(*argv, "allmulticast") == 0) {
NEXT_ARG();
req->i.ifi_change |= IFF_ALLMULTI;
@@ -357,7 +357,7 @@
} else if (strcmp(*argv, "off") == 0) {
req->i.ifi_flags &= ~IFF_ALLMULTI;
} else
- return on_off("allmulticast");
+ return on_off("allmulticast", *argv);
} else if (strcmp(*argv, "promisc") == 0) {
NEXT_ARG();
req->i.ifi_change |= IFF_PROMISC;
@@ -366,7 +366,7 @@
} else if (strcmp(*argv, "off") == 0) {
req->i.ifi_flags &= ~IFF_PROMISC;
} else
- return on_off("promisc");
+ return on_off("promisc", *argv);
} else if (strcmp(*argv, "trailers") == 0) {
NEXT_ARG();
req->i.ifi_change |= IFF_NOTRAILERS;
@@ -375,7 +375,7 @@
} else if (strcmp(*argv, "on") == 0) {
req->i.ifi_flags &= ~IFF_NOTRAILERS;
} else
- return on_off("trailers");
+ return on_off("trailers", *argv);
} else if (strcmp(*argv, "arp") == 0) {
NEXT_ARG();
req->i.ifi_change |= IFF_NOARP;
@@ -384,7 +384,7 @@
} else if (strcmp(*argv, "off") == 0) {
req->i.ifi_flags |= IFF_NOARP;
} else
- return on_off("noarp");
+ return on_off("noarp", *argv);
} else if (strcmp(*argv, "vf") == 0) {
struct rtattr *vflist;
NEXT_ARG();
@@ -417,7 +417,7 @@
} else if (strcmp(*argv, "off") == 0) {
req->i.ifi_flags &= ~IFF_DYNAMIC;
} else
- return on_off("dynamic");
+ return on_off("dynamic", *argv);
} else if (matches(*argv, "type") == 0) {
NEXT_ARG();
*type = *argv;
@@ -852,7 +852,7 @@
} else if (strcmp(*argv, "off") == 0) {
flags &= ~IFF_MULTICAST;
} else
- return on_off("multicast");
+ return on_off("multicast", *argv);
} else if (strcmp(*argv, "allmulticast") == 0) {
NEXT_ARG();
mask |= IFF_ALLMULTI;
@@ -861,7 +861,7 @@
} else if (strcmp(*argv, "off") == 0) {
flags &= ~IFF_ALLMULTI;
} else
- return on_off("allmulticast");
+ return on_off("allmulticast", *argv);
} else if (strcmp(*argv, "promisc") == 0) {
NEXT_ARG();
mask |= IFF_PROMISC;
@@ -870,7 +870,7 @@
} else if (strcmp(*argv, "off") == 0) {
flags &= ~IFF_PROMISC;
} else
- return on_off("promisc");
+ return on_off("promisc", *argv);
} else if (strcmp(*argv, "trailers") == 0) {
NEXT_ARG();
mask |= IFF_NOTRAILERS;
@@ -879,7 +879,7 @@
} else if (strcmp(*argv, "on") == 0) {
flags &= ~IFF_NOTRAILERS;
} else
- return on_off("trailers");
+ return on_off("trailers", *argv);
} else if (strcmp(*argv, "arp") == 0) {
NEXT_ARG();
mask |= IFF_NOARP;
@@ -888,7 +888,7 @@
} else if (strcmp(*argv, "off") == 0) {
flags |= IFF_NOARP;
} else
- return on_off("noarp");
+ return on_off("noarp", *argv);
} else if (matches(*argv, "dynamic") == 0) {
NEXT_ARG();
mask |= IFF_DYNAMIC;
@@ -897,7 +897,7 @@
} else if (strcmp(*argv, "off") == 0) {
flags &= ~IFF_DYNAMIC;
} else
- return on_off("dynamic");
+ return on_off("dynamic", *argv);
} else {
if (strcmp(*argv, "dev") == 0) {
NEXT_ARG();
diff --git a/ip/iplink_can.c b/ip/iplink_can.c
index c8af4bc..5674358 100644
--- a/ip/iplink_can.c
+++ b/ip/iplink_can.c
@@ -68,8 +68,8 @@
cm->flags |= flags;
} else if (strcmp(arg, "off") != 0) {
fprintf(stderr,
- "Error: argument of \"%s\" must be \"on\" or \"off\"\n",
- name);
+ "Error: argument of \"%s\" must be \"on\" or \"off\", not \"%s\"\n",
+ name, arg);
exit(-1);
}
cm->mask |= flags;
@@ -169,7 +169,7 @@
usage();
return -1;
} else {
- fprintf(stderr, "can: what is \"%s\"?\n", *argv);
+ fprintf(stderr, "can: unknown option \"%s\"\n", *argv);
usage();
return -1;
}
diff --git a/ip/iplink_ipoib.c b/ip/iplink_ipoib.c
index ae372bc..5c1c68c 100644
--- a/ip/iplink_ipoib.c
+++ b/ip/iplink_ipoib.c
@@ -66,7 +66,7 @@
explain();
return -1;
} else {
- fprintf(stderr, "ipoib: what is \"%s\"?\n", *argv);
+ fprintf(stderr, "ipoib: unknown option \"%s\"?\n", *argv);
explain();
return -1;
}
diff --git a/ip/iplink_macvlan.c b/ip/iplink_macvlan.c
index ed0e34b..5b4b868 100644
--- a/ip/iplink_macvlan.c
+++ b/ip/iplink_macvlan.c
@@ -58,7 +58,7 @@
explain();
return -1;
} else {
- fprintf(stderr, "macvlan: what is \"%s\"?\n", *argv);
+ fprintf(stderr, "macvlan: unknown option \"%s\"?\n", *argv);
explain();
return -1;
}
diff --git a/ip/iplink_macvtap.c b/ip/iplink_macvtap.c
index 6c7fe1f..bea9f0c 100644
--- a/ip/iplink_macvtap.c
+++ b/ip/iplink_macvtap.c
@@ -24,10 +24,10 @@
);
}
-static int mode_arg(void)
+static int mode_arg(const char *arg)
{
fprintf(stderr, "Error: argument of \"mode\" must be \"private\", "
- "\"vepa\", \"bridge\" or \"passthru\" \n");
+ "\"vepa\", \"bridge\" or \"passthru\", not \"%s\"\n", arg);
return -1;
}
@@ -48,14 +48,14 @@
else if (strcmp(*argv, "passthru") == 0)
mode = MACVLAN_MODE_PASSTHRU;
else
- return mode_arg();
+ return mode_arg(*argv);
addattr32(n, 1024, IFLA_MACVLAN_MODE, mode);
} else if (matches(*argv, "help") == 0) {
explain();
return -1;
} else {
- fprintf(stderr, "macvtap: what is \"%s\"?\n", *argv);
+ fprintf(stderr, "macvtap: unknown command \"%s\"?\n", *argv);
explain();
return -1;
}
diff --git a/ip/iplink_vlan.c b/ip/iplink_vlan.c
index 97af8d6..26ceb8d 100644
--- a/ip/iplink_vlan.c
+++ b/ip/iplink_vlan.c
@@ -33,9 +33,9 @@
);
}
-static int on_off(char *msg)
+static int on_off(const char *msg, const char *arg)
{
- fprintf(stderr, "Error: argument of \"%s\" must be \"on\" or \"off\"\n", msg);
+ fprintf(stderr, "Error: argument of \"%s\" must be \"on\" or \"off\", not \"%s\"\n", msg, arg);
return -1;
}
@@ -93,7 +93,7 @@
else if (strcmp(*argv, "off") == 0)
flags.flags &= ~VLAN_FLAG_REORDER_HDR;
else
- return on_off("reorder_hdr");
+ return on_off("reorder_hdr", *argv);
} else if (matches(*argv, "gvrp") == 0) {
NEXT_ARG();
flags.mask |= VLAN_FLAG_GVRP;
@@ -102,7 +102,7 @@
else if (strcmp(*argv, "off") == 0)
flags.flags &= ~VLAN_FLAG_GVRP;
else
- return on_off("gvrp");
+ return on_off("gvrp", *argv);
} else if (matches(*argv, "loose_binding") == 0) {
NEXT_ARG();
flags.mask |= VLAN_FLAG_LOOSE_BINDING;
@@ -111,7 +111,7 @@
else if (strcmp(*argv, "off") == 0)
flags.flags &= ~VLAN_FLAG_LOOSE_BINDING;
else
- return on_off("loose_binding");
+ return on_off("loose_binding", *argv);
} else if (matches(*argv, "ingress-qos-map") == 0) {
NEXT_ARG();
if (vlan_parse_qos_map(&argc, &argv, n,
@@ -128,7 +128,7 @@
explain();
return -1;
} else {
- fprintf(stderr, "vlan: what is \"%s\"?\n", *argv);
+ fprintf(stderr, "vlan: unknown command \"%s\"?\n", *argv);
explain();
return -1;
}
diff --git a/ip/iplink_vxlan.c b/ip/iplink_vxlan.c
index 4b72361..1025326 100644
--- a/ip/iplink_vxlan.c
+++ b/ip/iplink_vxlan.c
@@ -149,7 +149,7 @@
explain();
return -1;
} else {
- fprintf(stderr, "vxlan: what is \"%s\"?\n", *argv);
+ fprintf(stderr, "vxlan: unknown command \"%s\"?\n", *argv);
explain();
return -1;
}
diff --git a/ip/ipnetns.c b/ip/ipnetns.c
index 51b1c5e..b047b97 100644
--- a/ip/ipnetns.c
+++ b/ip/ipnetns.c
@@ -130,7 +130,7 @@
return EXIT_FAILURE;
}
if (argc < 2) {
- fprintf(stderr, "No cmd specified\n");
+ fprintf(stderr, "No command specified\n");
return EXIT_FAILURE;
}
name = argv[0];
@@ -138,13 +138,13 @@
snprintf(net_path, sizeof(net_path), "%s/%s", NETNS_RUN_DIR, name);
netns = open(net_path, O_RDONLY);
if (netns < 0) {
- fprintf(stderr, "Cannot open network namespace %s: %s\n",
+ fprintf(stderr, "Cannot open network namespace \"%s\": %s\n",
name, strerror(errno));
return EXIT_FAILURE;
}
if (setns(netns, CLONE_NEWNET) < 0) {
- fprintf(stderr, "seting the network namespace failed: %s\n",
- strerror(errno));
+ fprintf(stderr, "seting the network namespace \"%s\" failed: %s\n",
+ name, strerror(errno));
return EXIT_FAILURE;
}
@@ -154,7 +154,7 @@
}
/* Don't let any mounts propogate back to the parent */
if (mount("", "/", "none", MS_SLAVE | MS_REC, NULL)) {
- fprintf(stderr, "mount --make-rslave / failed: %s\n",
+ fprintf(stderr, "\"mount --make-rslave /\" failed: %s\n",
strerror(errno));
return EXIT_FAILURE;
}
@@ -172,7 +172,7 @@
bind_etc(name);
if (execvp(cmd, argv + 1) < 0)
- fprintf(stderr, "exec of %s failed: %s\n",
+ fprintf(stderr, "exec of \"%s\" failed: %s\n",
cmd, strerror(errno));
return EXIT_FAILURE;
}
@@ -330,7 +330,7 @@
snprintf(netns_path, sizeof(netns_path), "%s/%s", NETNS_RUN_DIR, name);
umount2(netns_path, MNT_DETACH);
if (unlink(netns_path) < 0) {
- fprintf(stderr, "Cannot remove %s: %s\n",
+ fprintf(stderr, "Cannot remove namespace file \"%s\": %s\n",
netns_path, strerror(errno));
return EXIT_FAILURE;
}
@@ -389,14 +389,14 @@
/* Create the filesystem state */
fd = open(netns_path, O_RDONLY|O_CREAT|O_EXCL, 0);
if (fd < 0) {
- fprintf(stderr, "Could not create %s: %s\n",
+ fprintf(stderr, "Cannot not create namespace file \"%s\": %s\n",
netns_path, strerror(errno));
return EXIT_FAILURE;
}
close(fd);
if (unshare(CLONE_NEWNET) < 0) {
- fprintf(stderr, "Failed to create a new network namespace: %s\n",
- strerror(errno));
+ fprintf(stderr, "Failed to create a new network namespace \"%s\": %s\n",
+ name, strerror(errno));
goto out_delete;
}
diff --git a/ip/ipprefix.c b/ip/ipprefix.c
index ee276b3..cf68f89 100644
--- a/ip/ipprefix.c
+++ b/ip/ipprefix.c
@@ -60,7 +60,7 @@
return 0;
if (prefix->prefix_family != AF_INET6) {
- fprintf(stderr, "wrong family %d\n", prefix->prefix_family);
+ fprintf(stderr, "incorrect protocol family: %d\n", prefix->prefix_family);
return 0;
}
if (prefix->prefix_type != ND_OPT_PREFIX_INFORMATION) {
diff --git a/ip/iproute.c b/ip/iproute.c
index c60156f..309cc87 100644
--- a/ip/iproute.c
+++ b/ip/iproute.c
@@ -1099,7 +1099,7 @@
int ret;
if (isatty(STDOUT_FILENO)) {
- fprintf(stderr, "Not sending binary stream to stdout\n");
+ fprintf(stderr, "Not sending a binary stream to stdout\n");
return -1;
}
@@ -1445,7 +1445,7 @@
}
if (req.r.rtm_dst_len == 0) {
- fprintf(stderr, "need at least destination address\n");
+ fprintf(stderr, "need at least a destination address\n");
exit(1);
}
diff --git a/ip/iptunnel.c b/ip/iptunnel.c
index f8b91ba..4275f26 100644
--- a/ip/iptunnel.c
+++ b/ip/iptunnel.c
@@ -102,7 +102,7 @@
p->iph.protocol = IPPROTO_IPIP;
p->i_flags |= VTI_ISVTI;
} else {
- fprintf(stderr,"Cannot guess tunnel mode.\n");
+ fprintf(stderr,"Unknown tunnel mode \"%s\"\n", *argv);
exit(-1);
}
} else if (strcmp(*argv, "key") == 0) {
@@ -114,7 +114,7 @@
p->i_key = p->o_key = get_addr32(*argv);
else {
if (get_unsigned(&uval, *argv, 0)<0) {
- fprintf(stderr, "invalid value of \"key\"\n");
+ fprintf(stderr, "invalid value for \"key\": \"%s\"; it should be an unsigned integer\n", *argv);
exit(-1);
}
p->i_key = p->o_key = htonl(uval);
@@ -127,7 +127,7 @@
p->i_key = get_addr32(*argv);
else {
if (get_unsigned(&uval, *argv, 0)<0) {
- fprintf(stderr, "invalid value of \"ikey\"\n");
+ fprintf(stderr, "invalid value for \"ikey\": \"%s\"; it should be an unsigned integer\n", *argv);
exit(-1);
}
p->i_key = htonl(uval);
@@ -140,7 +140,7 @@
p->o_key = get_addr32(*argv);
else {
if (get_unsigned(&uval, *argv, 0)<0) {
- fprintf(stderr, "invalid value of \"okey\"\n");
+ fprintf(stderr, "invalid value for \"okey\": \"%s\"; it should be an unsigned integer\n", *argv);
exit(-1);
}
p->o_key = htonl(uval);
@@ -242,7 +242,7 @@
if (p->iph.protocol == IPPROTO_IPIP || p->iph.protocol == IPPROTO_IPV6) {
if ((p->i_flags & GRE_KEY) || (p->o_flags & GRE_KEY)) {
- fprintf(stderr, "Keys are not allowed with ipip and sit.\n");
+ fprintf(stderr, "Keys are not allowed with ipip and sit tunnels\n");
return -1;
}
}
@@ -262,7 +262,7 @@
p->o_flags |= GRE_KEY;
}
if (IN_MULTICAST(ntohl(p->iph.daddr)) && !p->iph.saddr) {
- fprintf(stderr, "Broadcast tunnel requires a source address.\n");
+ fprintf(stderr, "A broadcast tunnel requires a source address\n");
return -1;
}
if (isatap)
@@ -444,7 +444,7 @@
buf[sizeof(buf) - 1] = 0;
if ((ptr = strchr(buf, ':')) == NULL ||
(*ptr++ = 0, sscanf(buf, "%s", name) != 1)) {
- fprintf(stderr, "Wrong format of /proc/net/dev. Sorry.\n");
+ fprintf(stderr, "Wrong format for /proc/net/dev. Giving up.\n");
fclose(fp);
return -1;
}
@@ -461,7 +461,7 @@
continue;
type = ll_index_to_type(index);
if (type == -1) {
- fprintf(stderr, "Failed to get type of [%s]\n", name);
+ fprintf(stderr, "Failed to get type of \"%s\"\n", name);
continue;
}
if (type != ARPHRD_TUNNEL && type != ARPHRD_IPGRE && type != ARPHRD_SIT)
@@ -558,17 +558,17 @@
strncpy(medium, *argv, IFNAMSIZ-1);
devname++;
} else {
- fprintf(stderr,"%s: Invalid PRL parameter.\n", *argv);
+ fprintf(stderr,"Invalid PRL parameter \"%s\"\n", *argv);
exit(-1);
}
if (count > 1) {
- fprintf(stderr,"One PRL entry at a time.\n");
+ fprintf(stderr,"One PRL entry at a time\n");
exit(-1);
}
argc--; argv++;
}
if (devname == 0) {
- fprintf(stderr, "Must specify dev.\n");
+ fprintf(stderr, "Must specify device\n");
exit(-1);
}
@@ -608,13 +608,13 @@
strncpy(medium, *argv, IFNAMSIZ-1);
devname++;
} else {
- fprintf(stderr,"%s: Invalid 6RD parameter.\n", *argv);
+ fprintf(stderr,"Invalid 6RD parameter \"%s\"\n", *argv);
exit(-1);
}
argc--; argv++;
}
if (devname == 0) {
- fprintf(stderr, "Must specify dev.\n");
+ fprintf(stderr, "Must specify device\n");
exit(-1);
}
@@ -637,7 +637,7 @@
case AF_INET6:
return do_ip6tunnel(argc, argv);
default:
- fprintf(stderr, "Unsupported family:%d\n", preferred_family);
+ fprintf(stderr, "Unsupported protocol family: %d\n", preferred_family);
exit(-1);
}
@@ -661,6 +661,6 @@
} else
return do_show(0, NULL);
- fprintf(stderr, "Command \"%s\" is unknown, try \"ip tunnel help\".\n", *argv);
+ fprintf(stderr, "Command \"%s\" is unknown, try \"ip tunnel help\"\n", *argv);
exit(-1);
}
diff --git a/ip/iptuntap.c b/ip/iptuntap.c
index 20914e1..3d9ad7d 100644
--- a/ip/iptuntap.c
+++ b/ip/iptuntap.c
@@ -128,7 +128,7 @@
}
ifr->ifr_flags |= IFF_TAP;
} else {
- fprintf(stderr,"Cannot guess tunnel mode.\n");
+ fprintf(stderr,"Unknown tunnel mode \"%s\"\n", *argv);
exit(-1);
}
} else if (uid && matches(*argv, "user") == 0) {
diff --git a/ip/ipxfrm.c b/ip/ipxfrm.c
index dda4a7a..5a0f215 100644
--- a/ip/ipxfrm.c
+++ b/ip/ipxfrm.c
@@ -1231,7 +1231,7 @@
uval = htonl(get_addr32(*argv));
else {
if (get_unsigned(&uval, *argv, 0)<0) {
- fprintf(stderr, "invalid value of \"key\"\n");
+ fprintf(stderr, "invalid value for \"key\"; it should be an unsigned integer\n");
exit(-1);
}
}
diff --git a/ip/link_gre.c b/ip/link_gre.c
index 839fb29..7e0b896 100644
--- a/ip/link_gre.c
+++ b/ip/link_gre.c
@@ -141,7 +141,7 @@
else {
if (get_unsigned(&uval, *argv, 0) < 0) {
fprintf(stderr,
- "Invalid value for \"key\"\n");
+ "Invalid value for \"key\": \"%s\"; it should be an unsigned integer\n", *argv);
exit(-1);
}
uval = htonl(uval);
@@ -157,7 +157,7 @@
uval = get_addr32(*argv);
else {
if (get_unsigned(&uval, *argv, 0)<0) {
- fprintf(stderr, "invalid value of \"ikey\"\n");
+ fprintf(stderr, "invalid value for \"ikey\": \"%s\"; it should be an unsigned integer\n", *argv);
exit(-1);
}
uval = htonl(uval);
@@ -172,7 +172,7 @@
uval = get_addr32(*argv);
else {
if (get_unsigned(&uval, *argv, 0)<0) {
- fprintf(stderr, "invalid value of \"okey\"\n");
+ fprintf(stderr, "invalid value for \"okey\": \"%s\"; it should be an unsigned integer\n", *argv);
exit(-1);
}
uval = htonl(uval);
@@ -247,7 +247,7 @@
oflags |= GRE_KEY;
}
if (IN_MULTICAST(ntohl(daddr)) && !saddr) {
- fprintf(stderr, "Broadcast tunnel requires a source address.\n");
+ fprintf(stderr, "A broadcast tunnel requires a source address.\n");
return -1;
}
diff --git a/ip/link_vti.c b/ip/link_vti.c
index 385f435..77a7482 100644
--- a/ip/link_vti.c
+++ b/ip/link_vti.c
@@ -117,7 +117,7 @@
else {
if (get_unsigned(&uval, *argv, 0) < 0) {
fprintf(stderr,
- "Invalid value for \"key\"\n");
+ "Invalid value for \"key\": \"%s\"; it should be an unsigned integer\n", *argv);
exit(-1);
}
uval = htonl(uval);
@@ -132,7 +132,7 @@
uval = get_addr32(*argv);
else {
if (get_unsigned(&uval, *argv, 0) < 0) {
- fprintf(stderr, "invalid value of \"ikey\"\n");
+ fprintf(stderr, "invalid value for \"ikey\": \"%s\"; it should be an unsigned integer\n", *argv);
exit(-1);
}
uval = htonl(uval);
@@ -146,7 +146,7 @@
uval = get_addr32(*argv);
else {
if (get_unsigned(&uval, *argv, 0) < 0) {
- fprintf(stderr, "invalid value of \"okey\"\n");
+ fprintf(stderr, "invalid value for \"okey\": \"%s\"; it should be an unsigned integer\n", *argv);
exit(-1);
}
uval = htonl(uval);
@@ -155,7 +155,7 @@
} else if (!matches(*argv, "remote")) {
NEXT_ARG();
if (!strcmp(*argv, "any")) {
- fprintf(stderr, "invalid value of \"remote\"\n");
+ fprintf(stderr, "invalid value for \"remote\": \"%s\"\n", *argv);
exit(-1);
} else {
daddr = get_addr32(*argv);
@@ -163,7 +163,7 @@
} else if (!matches(*argv, "local")) {
NEXT_ARG();
if (!strcmp(*argv, "any")) {
- fprintf(stderr, "invalid value of \"local\"\n");
+ fprintf(stderr, "invalid value for \"local\": \"%s\"\n", *argv);
exit(-1);
} else {
saddr = get_addr32(*argv);
diff --git a/ip/tcp_metrics.c b/ip/tcp_metrics.c
index 34e1d8e..a01e1fb 100644
--- a/ip/tcp_metrics.c
+++ b/ip/tcp_metrics.c
@@ -268,7 +268,7 @@
case AF_INET6:
break;
default:
- fprintf(stderr, "Unsupported family:%d\n", preferred_family);
+ fprintf(stderr, "Unsupported protocol family: %d\n", preferred_family);
return -1;
}
diff --git a/ip/tunnel.c b/ip/tunnel.c
index b176d3f..a6a2846 100644
--- a/ip/tunnel.c
+++ b/ip/tunnel.c
@@ -74,7 +74,7 @@
fd = socket(preferred_family, SOCK_DGRAM, 0);
err = ioctl(fd, SIOCGETTUNNEL, &ifr);
if (err)
- fprintf(stderr, "get tunnel %s failed: %s\n", basedev,
+ fprintf(stderr, "get tunnel \"%s\" failed: %s\n", basedev,
strerror(errno));
close(fd);
@@ -95,7 +95,7 @@
fd = socket(preferred_family, SOCK_DGRAM, 0);
err = ioctl(fd, cmd, &ifr);
if (err)
- fprintf(stderr, "add tunnel %s failed: %s\n", ifr.ifr_name,
+ fprintf(stderr, "add tunnel \"%s\" failed: %s\n", ifr.ifr_name,
strerror(errno));
close(fd);
return err;
@@ -116,7 +116,7 @@
fd = socket(preferred_family, SOCK_DGRAM, 0);
err = ioctl(fd, SIOCDELTUNNEL, &ifr);
if (err)
- fprintf(stderr, "delete tunnel %s failed: %s\n",
+ fprintf(stderr, "delete tunnel \"%s\" failed: %s\n",
ifr.ifr_name, strerror(errno));
close(fd);
return err;
