Patch from Vladimir N. Oleynik to save 128 bytes by moving error

checking for some my_* functions to utility.c

busybox.h

@@ -175,11 +175,11 @@ extern unsigned long parse_number(const char *numstr,
 /* These parse entries in /etc/passwd and /etc/group.  This is desirable
  * for BusyBox since we want to avoid using the glibc NSS stuff, which
  * increases target size and is often not needed embedded systems.  */
-extern long my_getpwnam(char *name);
+extern long my_getpwnam(const char *name);
-extern long my_getgrnam(char *name);
+extern long my_getgrnam(const char *name);
 extern void my_getpwuid(char *name, long uid);
 extern void my_getgrgid(char *group, long gid);
-extern long my_getpwnamegid(char *name);
+extern long my_getpwnamegid(const char *name);
 
 extern int device_open(char *device, int mode);
 

chmod_chown_chgrp.c

@@ -122,8 +122,6 @@ int chmod_chown_chgrp_main(int argc, char **argv)
 			gid = strtoul(groupName, &p, 10);	/* maybe it's already numeric */
 			if (groupName == p)
 				gid = my_getgrnam(groupName);
-			if (gid == -1)
-				goto bad_group;
 		} else {
 			groupName = strchr(*argv, '.');
 			if (groupName == NULL)
@@ -133,8 +131,6 @@ int chmod_chown_chgrp_main(int argc, char **argv)
 				gid = strtoul(groupName, &p, 10);
 				if (groupName == p)
 					gid = my_getgrnam(groupName);
-				if (gid == -1)
-					goto bad_group;
 			} else
 				gid = -1;
 		}
@@ -145,9 +141,6 @@ int chmod_chown_chgrp_main(int argc, char **argv)
 			uid = strtoul(*argv, &p, 10);	/* if numeric ... */
 			if (*argv == p)
 				uid = my_getpwnam(*argv);
-			if (uid == -1) {
-				error_msg_and_die( "unknown user name: %s", *argv);
-			}
 		}
 	}
 
@@ -162,8 +155,6 @@ int chmod_chown_chgrp_main(int argc, char **argv)
 	}
 	return EXIT_SUCCESS;
 
-  bad_group:
-	error_msg_and_die( "unknown group name: %s", groupName);
 }
 
 /*

coreutils/id.c

@@ -76,9 +76,6 @@ extern int id_main(int argc, char **argv)
 
 	pwnam=my_getpwnam(user);
 	grnam=my_getgrnam(group);
-	if (gid == -1 || pwnam==-1 || grnam==-1) {
-		error_msg_and_die("%s: No such user", user);
-	}
 
 	if (no_group) {
 		if(name_not_number && user)

id.c

@@ -76,9 +76,6 @@ extern int id_main(int argc, char **argv)
 
 	pwnam=my_getpwnam(user);
 	grnam=my_getgrnam(group);
-	if (gid == -1 || pwnam==-1 || grnam==-1) {
-		error_msg_and_die("%s: No such user", user);
-	}
 
 	if (no_group) {
 		if(name_not_number && user)

include/busybox.h

@@ -175,11 +175,11 @@ extern unsigned long parse_number(const char *numstr,
 /* These parse entries in /etc/passwd and /etc/group.  This is desirable
  * for BusyBox since we want to avoid using the glibc NSS stuff, which
  * increases target size and is often not needed embedded systems.  */
-extern long my_getpwnam(char *name);
+extern long my_getpwnam(const char *name);
-extern long my_getgrnam(char *name);
+extern long my_getgrnam(const char *name);
 extern void my_getpwuid(char *name, long uid);
 extern void my_getgrgid(char *group, long gid);
-extern long my_getpwnamegid(char *name);
+extern long my_getpwnamegid(const char *name);
 
 extern int device_open(char *device, int mode);
 

utility.c

@@ -877,29 +877,32 @@ extern int parse_mode(const char *s, mode_t * theMode)
 #if defined BB_CHMOD_CHOWN_CHGRP || defined BB_PS || defined BB_LS \
  || defined BB_TAR || defined BB_ID || defined BB_LOGGER \
  || defined BB_LOGNAME || defined BB_WHOAMI || defined BB_SH
+
+#if defined BB_CHMOD_CHOWN_CHGRP || defined BB_ID
 /* returns a uid given a username */
-long my_getpwnam(char *name)
+long my_getpwnam(const char *name)
 {
 	struct passwd *myuser;
 
 	myuser  = getpwnam(name);
 	if (myuser==NULL)
-		return(-1);
+		error_msg_and_die("unknown user name: %s", name);
 
 	return myuser->pw_uid;
 }
 
 /* returns a gid given a group name */
-long my_getgrnam(char *name)
+long my_getgrnam(const char *name)
 {
 	struct group *mygroup;
 
 	mygroup  = getgrnam(name);
 	if (mygroup==NULL)
-		return(-1);
+		error_msg_and_die("unknown group name: %s", name);
 
 	return (mygroup->gr_gid);
 }
+#endif
 
 /* gets a username given a uid */
 void my_getpwuid(char *name, long uid)
@@ -927,18 +930,18 @@ void my_getgrgid(char *group, long gid)
 
 #if defined BB_ID
 /* gets a gid given a user name */
-long my_getpwnamegid(char *name)
+long my_getpwnamegid(const char *name)
 {
 	struct group *mygroup;
 	struct passwd *myuser;
 
 	myuser=getpwnam(name);
 	if (myuser==NULL)
-		error_msg_and_die( "unknown user name: %s", name);
+		error_msg_and_die("unknown user name: %s", name);
 
 	mygroup  = getgrgid(myuser->pw_gid);
 	if (mygroup==NULL)
-		error_msg_and_die( "unknown gid %ld", (long)myuser->pw_gid);
+		error_msg_and_die("unknown gid %ld", (long)myuser->pw_gid);
 
 	return mygroup->gr_gid;
 }