ll_map: Add function to remove link cache entry by index

[mirror_iproute2.git] / lib / color.c

diff --git a/lib/color.c b/lib/color.c
index 05afcb219b13b3d2286fdfae06b8d7f28042c60a..59976847295c5927816d525fefe6efdfbd4bc2de 100644 (file)
--- a/lib/color.c
+++ b/lib/color.c
@@ -1,12 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #include <stdio.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 #include <sys/socket.h>
 #include <sys/types.h>
 #include <linux/if.h>
 
 #include "color.h"
+#include "utils.h"
+
+static void set_color_palette(void);
 
 enum color {
        C_RED,
@@ -45,8 +50,8 @@ static const char * const color_codes[] = {
        NULL,
 };
 
-static enum color attr_colors[] = {
-       /* light background */
+/* light background */
+static enum color attr_colors_light[] = {
        C_CYAN,
        C_YELLOW,
        C_MAGENTA,
@@ -54,8 +59,10 @@ static enum color attr_colors[] = {
        C_GREEN,
        C_RED,
        C_CLEAR,
+};
 
-       /* dark background */
+/* dark background */
+static enum color attr_colors_dark[] = {
        C_BOLD_CYAN,
        C_BOLD_YELLOW,
        C_BOLD_MAGENTA,
@@ -68,13 +75,51 @@ static enum color attr_colors[] = {
 static int is_dark_bg;
 static int color_is_enabled;
 
-void enable_color(void)
+static void enable_color(void)
 {
        color_is_enabled = 1;
        set_color_palette();
 }
 
-void set_color_palette(void)
+bool check_enable_color(int color, int json)
+{
+       if (json || color == COLOR_OPT_NEVER)
+               return false;
+
+       if (color == COLOR_OPT_ALWAYS || isatty(fileno(stdout))) {
+               enable_color();
+               return true;
+       }
+       return false;
+}
+
+bool matches_color(const char *arg, int *val)
+{
+       char *dup, *p;
+
+       if (!val)
+               return false;
+
+       dup = strdupa(arg);
+       p = strchrnul(dup, '=');
+       if (*p)
+               *(p++) = '\0';
+
+       if (matches(dup, "-color"))
+               return false;
+
+       if (*p == '\0' || !strcmp(p, "always"))
+               *val = COLOR_OPT_ALWAYS;
+       else if (!strcmp(p, "auto"))
+               *val = COLOR_OPT_AUTO;
+       else if (!strcmp(p, "never"))
+               *val = COLOR_OPT_NEVER;
+       else
+               return false;
+       return true;
+}
+
+static void set_color_palette(void)
 {
        char *p = getenv("COLORFGBG");
 
@@ -89,14 +134,7 @@ void set_color_palette(void)
                is_dark_bg = 1;
 }
 
-void check_if_color_enabled(void)
-{
-       if (color_is_enabled) {
-               fprintf(stderr, "Option \"-json\" conflicts with \"-color\".\n");
-               exit(1);
-       }
-}
-
+__attribute__((format(printf, 3, 4)))
 int color_fprintf(FILE *fp, enum color_attr attr, const char *fmt, ...)
 {
        int ret = 0;
@@ -104,13 +142,14 @@ int color_fprintf(FILE *fp, enum color_attr attr, const char *fmt, ...)
 
        va_start(args, fmt);
 
-       if (!color_is_enabled || attr == COLOR_CLEAR) {
+       if (!color_is_enabled || attr == COLOR_NONE) {
                ret = vfprintf(fp, fmt, args);
                goto end;
        }
 
-       ret += fprintf(fp, "%s",
-                      color_codes[attr_colors[is_dark_bg ? attr + 7 : attr]]);
+       ret += fprintf(fp, "%s", color_codes[is_dark_bg ?
+               attr_colors_dark[attr] : attr_colors_light[attr]]);
+
        ret += vfprintf(fp, fmt, args);
        ret += fprintf(fp, "%s", color_codes[C_CLEAR]);
 
@@ -127,7 +166,7 @@ enum color_attr ifa_family_color(__u8 ifa_family)
        case AF_INET6:
                return COLOR_INET6;
        default:
-               return COLOR_CLEAR;
+               return COLOR_NONE;
        }
 }
 
@@ -139,6 +178,6 @@ enum color_attr oper_state_color(__u8 state)
        case IF_OPER_DOWN:
                return COLOR_OPERSTATE_DOWN;
        default:
-               return COLOR_CLEAR;
+               return COLOR_NONE;
        }
 }