From: Karel Zak <kzak@redhat.com>
Date: Thu, 28 Nov 2024 12:39:10 +0000 (+0100)
Subject: include: add functions to implement --hyperlink
X-Git-Tag: v2.42-start~120^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=28453bcca770f897a6c36706148e105fb7e476ca;p=thirdparty%2Futil-linux.git

include: add functions to implement --hyperlink

* add xgethosturi() to allocate file://hostname
* add hyperlinkwanted_or_err() to parse --hyperlink={never,always,auto}

Signed-off-by: Karel Zak <kzak@redhat.com>
---

diff --git a/include/strutils.h b/include/strutils.h
index e5ddbcf1b..8ef9c880e 100644
--- a/include/strutils.h
+++ b/include/strutils.h
@@ -14,6 +14,7 @@
 #include <stdio.h>
 #include <errno.h>
 #include <time.h>
+#include <stdbool.h>
 
 #include "c.h"
 
@@ -58,6 +59,8 @@ extern void strtotimespec_or_err(const char *str, struct timespec *ts,
 		const char *errmesg);
 extern time_t strtotime_or_err(const char *str, const char *errmesg);
 
+extern bool hyperlinkwanted_or_err(const char *mode, const char *errmesg);
+
 extern int isdigit_strend(const char *str, const char **end);
 #define isdigit_string(_s)	isdigit_strend(_s, NULL)
 
diff --git a/include/xalloc.h b/include/xalloc.h
index 1ece82d56..e8e427c86 100644
--- a/include/xalloc.h
+++ b/include/xalloc.h
@@ -193,4 +193,21 @@ char *xgethostname(void)
 	return name;
 }
 
+static inline
+__attribute__((warn_unused_result))
+char *xgethosturi(const char *proto)
+{
+	char *n = xgethostname();
+	char *uri = NULL;
+
+	if (!proto)
+		proto = "file://";
+	if (!n)
+		return xstrdup(proto);
+
+	xasprintf(&uri, "%s%s", proto, n);
+	free(n);
+	return uri;
+}
+
 #endif
diff --git a/lib/strutils.c b/lib/strutils.c
index e3a059145..2b54bcce5 100644
--- a/lib/strutils.c
+++ b/lib/strutils.c
@@ -524,6 +524,20 @@ time_t strtotime_or_err(const char *str, const char *errmesg)
 	return (time_t) user_input;
 }
 
+bool hyperlinkwanted_or_err(const char *mode, const char *errmesg)
+{
+	if (mode && strcmp(mode, "never") == 0)
+		return false;
+
+	if (mode && strcmp(mode, "always") == 0)
+		return true;
+
+	if (!mode || strcmp(mode, "auto") == 0)
+		return isatty(STDOUT_FILENO) ? true : false;
+
+	errx(EXIT_FAILURE, "%s: '%s'", errmesg, mode);
+}
+
 /*
  * Converts stat->st_mode to ls(1)-like mode string. The size of "str" must
  * be 11 bytes.