On 01/28/18 21:24, bijan wrote:
Hi,
Added -l argument to ifconfig to only print names of interfaces.
(Maybe a lame excuse from me for being too lazy but FreeBSD
supports it too)
Missed the usage string, Update!
>From 2d00dbc563db1f2581342cbf02a83cbb3a6a5966 Mon Sep 17 00:00:00 2001
From: Bijan Ebrahimi <bijanebrah...@riseup.net>
Date: Fri, 19 Jan 2018 18:18:24 +0330
Subject: [PATCH] added printing list names
---
sbin/ifconfig/ifconfig.8 | 7 ++++++-
sbin/ifconfig/ifconfig.c | 37 ++++++++++++++++++++++++++++++++++++-
2 files changed, 42 insertions(+), 2 deletions(-)
diff --git sbin/ifconfig/ifconfig.8 sbin/ifconfig/ifconfig.8
index ef9592cf3..6055fa4aa 100644
--- sbin/ifconfig/ifconfig.8
+++ sbin/ifconfig/ifconfig.8
@@ -39,7 +39,7 @@
.Nd configure network interface parameters
.Sh SYNOPSIS
.Nm ifconfig
-.Op Fl AaC
+.Op Fl AaCl
.Op Ar interface
.Op Ar address_family
.Oo
@@ -88,6 +88,11 @@ This is the default, if no parameters are given to
Print the names of all network pseudo-devices that
can be created dynamically at runtime using
.Nm Cm create .
+.It Fl l
+Causes
+.Nm
+to print names of all existing interfaces.
+.Nm .
.It Ar interface
The
.Ar interface
diff --git sbin/ifconfig/ifconfig.c sbin/ifconfig/ifconfig.c
index 4a0f4d632..3505287c4 100644
--- sbin/ifconfig/ifconfig.c
+++ sbin/ifconfig/ifconfig.c
@@ -232,6 +232,7 @@ void unsettrunkport(const char *, int);
void settrunkproto(const char *, int);
void trunk_status(void);
void list_cloners(void);
+void list_names(void);
#ifndef SMALL
void carp_status(void);
@@ -632,6 +633,7 @@ main(int argc, char *argv[])
const struct afswtch *rafp = NULL;
int create = 0;
int Cflag = 0;
+ int lflag = 0;
int gflag = 0;
int i;
@@ -659,6 +661,10 @@ main(int argc, char *argv[])
case 'g':
gflag = 1;
break;
+ case 'l':
+ lflag = 1;
+ nomore = 1;
+ break;
case 'C':
Cflag = 1;
nomore = 1;
@@ -695,6 +701,10 @@ main(int argc, char *argv[])
list_cloners();
return (0);
}
+ if (lflag) {
+ list_names();
+ return (0);
+ }
if (gflag) {
if (argc == 0)
printgroupattribs(name);
@@ -1147,6 +1157,31 @@ list_cloners(void)
free(buf);
}
+void
+list_names(void)
+{
+ int count = 0;
+ struct ifaddrs *ifap, *ifa;
+ const char *if_name = NULL;
+
+ if (getifaddrs(&ifap) != 0)
+ err(1, "getifaddrs");
+
+ for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
+ if (if_name == ifa->ifa_name)
+ continue;
+ if_name = ifa->ifa_name;
+ if (count++ > 0)
+ printf(" ");
+ printf ("%s", ifa->ifa_name);
+ }
+
+ if (if_name != NULL)
+ printf("\n");
+
+ freeifaddrs(ifap);
+}
+
#define RIDADDR 0
#define ADDR 1
#define MASK 2
@@ -5453,7 +5488,7 @@ __dead void
usage(void)
{
fprintf(stderr,
- "usage: ifconfig [-AaC] [interface] [address_family] "
+ "usage: ifconfig [-AaCl] [interface] [address_family] "
"[address [dest_address]]\n"
"\t\t[parameters]\n");
exit(1);
--
2.14.2
