From ae4148e6f0aba7d578976ffe8f56f52a02e91bdb Mon Sep 17 00:00:00 2001
From: Pierre Pronchery <khorben@defora.org>
Date: Tue, 8 Dec 2020 14:39:26 +0100
Subject: [PATCH] Use PROGNAME in more programs

---
 src/cat.c   |  9 +++++++--
 src/chgrp.c | 15 ++++++++++-----
 src/chmod.c |  9 +++++++--
 src/chown.c | 17 +++++++++++------
 4 files changed, 35 insertions(+), 15 deletions(-)

diff --git a/src/cat.c b/src/cat.c
index 1928877..532fba8 100644
--- a/src/cat.c
+++ b/src/cat.c
@@ -19,6 +19,11 @@
 #include <stdio.h>
 #include <string.h>
 
+/* constants */
+#ifndef PROGNAME
+# define PROGNAME	"cat"
+#endif
+
 
 /* cat */
 /* types */
@@ -68,7 +73,7 @@ static int _cat(OutputDelay od, int argc, char * argv[])
 
 static int _cat_error(char const * message, int ret)
 {
-	fputs("cat: ", stderr);
+	fputs(PROGNAME ": ", stderr);
 	perror(message);
 	return ret;
 }
@@ -97,7 +102,7 @@ static int _write_nonbuf(int c)
 /* usage */
 static int _usage(void)
 {
-	fputs("Usage: cat [-u][file ...]\n\
+	fputs("Usage: " PROGNAME " [-u][file ...]\n\
   -u	Write without delay\n", stderr);
 	return 1;
 }
diff --git a/src/chgrp.c b/src/chgrp.c
index c0f1743..6589345 100644
--- a/src/chgrp.c
+++ b/src/chgrp.c
@@ -25,6 +25,11 @@
 #include <stdio.h>
 #include <string.h>
 
+/* constants */
+#ifndef PROGNAME
+# define PROGNAME	"chgrp"
+#endif
+
 
 /* chgrp */
 /* types */
@@ -66,7 +71,7 @@ static int _chgrp_grp_error(char * group)
 {
 	if(errno == 0)
 	{
-		fprintf(stderr, "%s%s%s", "chgrp: ", group,
+		fprintf(stderr, "%s%s%s", PROGNAME ": ", group,
 				": Unknown group\n");
 		return 2;
 	}
@@ -75,7 +80,7 @@ static int _chgrp_grp_error(char * group)
 
 static int _chgrp_error(char * message, int ret)
 {
-	fputs("chgrp: ", stderr);
+	fputs(PROGNAME ": ", stderr);
 	perror(message);
 	return ret;
 }
@@ -150,8 +155,8 @@ static int _chgrp_do(int opts, gid_t gid, char * file)
 /* usage */
 static int _usage(void)
 {
-	fputs("Usage: chgrp [-hR] group file ...\n\
-       chgrp -R [-H | -L | -P] group file ...\n\
+	fputs("Usage: " PROGNAME " [-hR] group file ...\n\
+       " PROGNAME " -R [-H | -L | -P] group file ...\n\
   -h    Set the group IDs on symbolic links\n\
   -R    Recursively change file group IDs\n", stderr);
 	return 1;
@@ -178,7 +183,7 @@ int main(int argc, char * argv[])
 			case 'L':
 			case 'P':
 				/* FIXME implement */
-				fprintf(stderr, "%s%c%s", "chgrp: -", o,
+				fprintf(stderr, "%s%c%s", PROGNAME ": -", o,
 						": Not yet implemented\n");
 			default:
 				return _usage();
diff --git a/src/chmod.c b/src/chmod.c
index b0ac202..dcb2142 100644
--- a/src/chmod.c
+++ b/src/chmod.c
@@ -26,6 +26,11 @@
 #define COMMON_MODE
 #include "common.c"
 
+/* constants */
+#ifndef PROGNAME
+# define PROGNAME	"chmod"
+#endif
+
 
 /* types */
 typedef int Prefs;
@@ -52,7 +57,7 @@ static int _chmod(Prefs prefs, mode_t mode, int filec, char * filev[])
 
 static int _chmod_error(char const * message, int ret)
 {
-	fputs("chmod: ", stderr);
+	fputs(PROGNAME ": ", stderr);
 	perror(message);
 	return ret;
 }
@@ -121,7 +126,7 @@ static int _chmod_do_recursive_do(Prefs prefs, mode_t mode, char * file)
 /* usage */
 static int _usage(void)
 {
-	fputs("Usage: chmod [-R] mode file\n\
+	fputs("Usage: " PROGNAME " [-R] mode file\n\
   -R	Recursively change file mode bits\n", stderr);
 	return 1;
 }
diff --git a/src/chown.c b/src/chown.c
index fdc891e..2fb3a91 100644
--- a/src/chown.c
+++ b/src/chown.c
@@ -27,6 +27,11 @@
 #include <string.h>
 #include <ctype.h>
 
+/* constants */
+#ifndef PROGNAME
+# define PROGNAME	"chown"
+#endif
+
 
 /* types */
 typedef int Prefs;
@@ -65,7 +70,7 @@ static int _chown(Prefs * prefs, char * owner, int argc, char * argv[])
 
 static int _chown_error(char * message, int ret)
 {
-	fputs("chown: ", stderr);
+	fputs(PROGNAME ": ", stderr);
 	perror(message);
 	return ret;
 }
@@ -112,8 +117,8 @@ static int _chown_id_error(char * message, char * unknown, int ret)
 {
 	if(errno != 0)
 		return _chown_error(message, ret);
-	fprintf(stderr, "%s%s%s%s%s", "chown: ", message, ": Unknown ", unknown,
-			"\n");
+	fprintf(stderr, "%s%s%s%s%s", PROGNAME ": ", message, ": Unknown ",
+			unknown, "\n");
 	return ret;
 }
 
@@ -202,8 +207,8 @@ static int _chown_do(Prefs * prefs, uid_t uid, gid_t gid, char * file)
 /* usage */
 static int _usage(void)
 {
-	fputs("Usage: chown [-hR] owner[:group] file ...\n\
-       chown -R [-H | -L | -P] owner[:group] file ...\n\
+	fputs("Usage: " PROGNAME " [-hR] owner[:group] file ...\n\
+       " PROGNAME " -R [-H | -L | -P] owner[:group] file ...\n\
   -h	Set the user and group IDs on symbolic links\n\
   -R	Recursively change file user and group IDs\n", stderr);
 	return 1;
@@ -228,7 +233,7 @@ int main(int argc, char * argv[])
 			case 'H':
 			case 'L':
 			case 'P':
-				fprintf(stderr, "%s%c%s", "chown: -", o,
+				fprintf(stderr, "%s%c%s", PROGNAME ": -", o,
 						": Not yet implemented\n");
 			default:
 				return _usage();