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Date: Tue, 28 Apr 2015 12:34:12 +0200
From: Yegor Yefremov <yegorslists@...glemail.com>
To: Mathias Nyman <m.nyman@....fi>
Cc: netdev <netdev@...r.kernel.org>,
Stephen Hemminger <stephen@...workplumber.org>,
aleksi.aalto@....fi
Subject: Re: [PATCH v4 iproute2] ip: Add color output option
On Tue, Apr 28, 2015 at 12:18 PM, Mathias Nyman <m.nyman@....fi> wrote:
> It is hard to quickly find what you are looking for in the output of the
> ip command. Color helps.
>
> This patch adds a '-c' flag to highlight these with individual colors:
> - interface name
> - ip address
> - mac address
> - up/down state
>
> Signed-off-by: Mathias Nyman <m.nyman@....fi>
Tested-by: Yegor Yefremov <yegorslists@...glemail.com>
> ---
>
> v4 - Remove leading spaces added by email client
>
> include/color.h | 16 +++++++++++++++
> ip/ip.c | 5 ++++-
> ip/ipaddress.c | 43 ++++++++++++++++++++++++++++----------
> lib/Makefile | 2 +-
> lib/color.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> man/man8/ip.8 | 7 ++++++-
> 6 files changed, 123 insertions(+), 14 deletions(-)
> create mode 100644 include/color.h
> create mode 100644 lib/color.c
>
> diff --git a/include/color.h b/include/color.h
> new file mode 100644
> index 0000000..b85003a
> --- /dev/null
> +++ b/include/color.h
> @@ -0,0 +1,16 @@
> +#ifndef __COLOR_H__
> +#define __COLOR_H__ 1
> +
> +enum color_attr {
> + COLOR_IFNAME,
> + COLOR_MAC,
> + COLOR_INET,
> + COLOR_INET6,
> + COLOR_OPERSTATE_UP,
> + COLOR_OPERSTATE_DOWN
> +};
> +
> +void enable_color(void);
> +int color_fprintf(FILE *fp, enum color_attr attr, const char *fmt, ...);
> +
> +#endif
> diff --git a/ip/ip.c b/ip/ip.c
> index f7f214b..c23de74 100644
> --- a/ip/ip.c
> +++ b/ip/ip.c
> @@ -23,6 +23,7 @@
> #include "utils.h"
> #include "ip_common.h"
> #include "namespace.h"
> +#include "color.h"
>
> int preferred_family = AF_UNSPEC;
> int human_readable = 0;
> @@ -56,7 +57,7 @@ static void usage(void)
> " -4 | -6 | -I | -D | -B | -0 |\n"
> " -l[oops] { maximum-addr-flush-attempts } |\n"
> " -o[neline] | -t[imestamp] | -ts[hort] | -b[atch] [filename] |\n"
> -" -rc[vbuf] [size] | -n[etns] name | -a[ll] }\n");
> +" -rc[vbuf] [size] | -n[etns] name | -a[ll] | -c[olor]}\n");
> exit(-1);
> }
>
> @@ -257,6 +258,8 @@ int main(int argc, char **argv)
> exit(-1);
> }
> rcvbuf = size;
> + } else if (matches(opt, "-color") == 0) {
> + enable_color();
> } else if (matches(opt, "-help") == 0) {
> usage();
> } else if (matches(opt, "-netns") == 0) {
> diff --git a/ip/ipaddress.c b/ip/ipaddress.c
> index e582da0..92afa49 100644
> --- a/ip/ipaddress.c
> +++ b/ip/ipaddress.c
> @@ -34,6 +34,7 @@
> #include "utils.h"
> #include "ll_map.h"
> #include "ip_common.h"
> +#include "color.h"
>
> enum {
> IPADD_LIST,
> @@ -136,8 +137,15 @@ static void print_operstate(FILE *f, __u8 state)
> {
> if (state >= sizeof(oper_states)/sizeof(oper_states[0]))
> fprintf(f, "state %#x ", state);
> - else
> - fprintf(f, "state %s ", oper_states[state]);
> + else {
> + fprintf(f, "state ");
> + if (strcmp(oper_states[state], "UP") == 0)
> + color_fprintf(f, COLOR_OPERSTATE_UP, "%s ", oper_states[state]);
> + else if (strcmp(oper_states[state], "DOWN") == 0)
> + color_fprintf(f, COLOR_OPERSTATE_DOWN, "%s ", oper_states[state]);
> + else
> + fprintf(f, "%s ", oper_states[state]);
> + }
> }
>
> int get_operstate(const char *name)
> @@ -606,7 +614,8 @@ int print_linkinfo(const struct sockaddr_nl *who,
> if (n->nlmsg_type == RTM_DELLINK)
> fprintf(fp, "Deleted ");
>
> - fprintf(fp, "%d: %s", ifi->ifi_index,
> + fprintf(fp, "%d: ", ifi->ifi_index);
> + color_fprintf(fp, COLOR_IFNAME, "%s",
> tb[IFLA_IFNAME] ? rta_getattr_str(tb[IFLA_IFNAME]) : "<nil>");
>
> if (tb[IFLA_LINK]) {
> @@ -666,10 +675,11 @@ int print_linkinfo(const struct sockaddr_nl *who,
> fprintf(fp, " link/%s ", ll_type_n2a(ifi->ifi_type, b1, sizeof(b1)));
>
> if (tb[IFLA_ADDRESS]) {
> - fprintf(fp, "%s", ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
> - RTA_PAYLOAD(tb[IFLA_ADDRESS]),
> - ifi->ifi_type,
> - b1, sizeof(b1)));
> + color_fprintf(fp, COLOR_MAC, "%s",
> + ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
> + RTA_PAYLOAD(tb[IFLA_ADDRESS]),
> + ifi->ifi_type,
> + b1, sizeof(b1)));
> }
> if (tb[IFLA_BROADCAST]) {
> if (ifi->ifi_flags&IFF_POINTOPOINT)
> @@ -849,10 +859,21 @@ int print_addrinfo(const struct sockaddr_nl *who, struct nlmsghdr *n,
> fprintf(fp, " family %d ", ifa->ifa_family);
>
> if (rta_tb[IFA_LOCAL]) {
> - fprintf(fp, "%s", format_host(ifa->ifa_family,
> - RTA_PAYLOAD(rta_tb[IFA_LOCAL]),
> - RTA_DATA(rta_tb[IFA_LOCAL]),
> - abuf, sizeof(abuf)));
> + if (ifa->ifa_family == AF_INET)
> + color_fprintf(fp, COLOR_INET, "%s", format_host(ifa->ifa_family,
> + RTA_PAYLOAD(rta_tb[IFA_LOCAL]),
> + RTA_DATA(rta_tb[IFA_LOCAL]),
> + abuf, sizeof(abuf)));
> + else if (ifa->ifa_family == AF_INET6)
> + color_fprintf(fp, COLOR_INET6, "%s", format_host(ifa->ifa_family,
> + RTA_PAYLOAD(rta_tb[IFA_LOCAL]),
> + RTA_DATA(rta_tb[IFA_LOCAL]),
> + abuf, sizeof(abuf)));
> + else
> + fprintf(fp, "%s", format_host(ifa->ifa_family,
> + RTA_PAYLOAD(rta_tb[IFA_LOCAL]),
> + RTA_DATA(rta_tb[IFA_LOCAL]),
> + abuf, sizeof(abuf)));
>
> if (rta_tb[IFA_ADDRESS] == NULL ||
> memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]),
> diff --git a/lib/Makefile b/lib/Makefile
> index 4c7cbc2..1d4045f 100644
> --- a/lib/Makefile
> +++ b/lib/Makefile
> @@ -7,7 +7,7 @@ endif
> CFLAGS += -fPIC
>
> UTILOBJ=utils.o rt_names.o ll_types.o ll_proto.o ll_addr.o inet_proto.o namespace.o \
> - names.o
> + names.o color.o
>
> NLOBJ=libgenl.o ll_map.o libnetlink.o
>
> diff --git a/lib/color.c b/lib/color.c
> new file mode 100644
> index 0000000..8c9a48b
> --- /dev/null
> +++ b/lib/color.c
> @@ -0,0 +1,64 @@
> +#include <stdio.h>
> +#include <stdarg.h>
> +
> +#include "color.h"
> +
> +enum color {
> + C_RED,
> + C_GREEN,
> + C_YELLOW,
> + C_BLUE,
> + C_MAGENTA,
> + C_CYAN,
> + C_WHITE,
> + C_CLEAR
> +};
> +
> +static const char * const color_codes[] = {
> + "\e[31m",
> + "\e[32m",
> + "\e[33m",
> + "\e[34m",
> + "\e[35m",
> + "\e[36m",
> + "\e[37m",
> + "\e[0m",
> + NULL,
> +};
> +
> +static enum color attr_colors[] = {
> + C_CYAN,
> + C_YELLOW,
> + C_MAGENTA,
> + C_BLUE,
> + C_GREEN,
> + C_RED
> +};
> +
> +static int color_is_enabled;
> +
> +void enable_color(void)
> +{
> + color_is_enabled = 1;
> +}
> +
> +int color_fprintf(FILE *fp, enum color_attr attr, const char *fmt, ...)
> +{
> + int ret = 0;
> + va_list args;
> +
> + va_start(args, fmt);
> +
> + if (!color_is_enabled) {
> + ret = vfprintf(fp, fmt, args);
> + goto end;
> + }
> +
> + ret += fprintf(fp, "%s", color_codes[attr_colors[attr]]);
> + ret += vfprintf(fp, fmt, args);
> + ret += fprintf(fp, "%s", color_codes[C_CLEAR]);
> +
> +end:
> + va_end(args);
> + return ret;
> +}
> diff --git a/man/man8/ip.8 b/man/man8/ip.8
> index 44d1ee6..43ddac9 100644
> --- a/man/man8/ip.8
> +++ b/man/man8/ip.8
> @@ -33,7 +33,8 @@ ip \- show / manipulate routing, devices, policy routing and tunnels
> .BR inet " | " inet6 " | " ipx " | " dnet " | " link " } | "
> \fB\-o\fR[\fIneline\fR] |
> \fB\-n\fR[\fIetns\fR] name |
> -\fB\-a\fR[\fIll\fR] }
> +\fB\-a\fR[\fIll\fR] |
> +\fB\-c\fR[\fIolor\fR] }
>
>
> .SH OPTIONS
> @@ -165,6 +166,10 @@ to
> .BR "\-a" , " \-all"
> executes specified command over all objects, it depends if command supports this option.
>
> +.TP
> +.BR "\-c" , " -color"
> +Use color output.
> +
> .SH IP - COMMAND SYNTAX
>
> .SS
> --
> 2.3.6
>
> --
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