From 49f4126464df857d9e0d1aa965a97355074bda4d Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Wed, 05 Jul 2023 12:38:50 -0400
Subject: mknod: Factor strtol() out of main()

---
(limited to 'helpers/mknod.c')

diff --git a/helpers/mknod.c b/helpers/mknod.c
index 7328d66..ef7ce98 100644
--- a/helpers/mknod.c
+++ b/helpers/mknod.c
@@ -55,10 +55,25 @@ static const struct option _LONGOPTS[] = {
 
 static const unsigned int _TIMEOUT = 10U;
 
+static char *_program_name;
+
+static int
+_strtol_or_err(const char *str, long int *l)
+{
+	char *end;
+
+	*l = strtol(str, &end, 10);
+	if (*end != '\0') {
+		fprintf(stderr, _("%s: Invalid number \"%s\"\n"),
+				_program_name, str);
+		return OPKG_OPK_ERROR;
+	}
+	return OPKG_OPK_OK;
+}
+
 int
 main(int argc, char *argv[])
 {
-	char          *program_name;
 	char          *work_area;
 	char         **exec_argv;
 	int            arg;
@@ -66,7 +81,6 @@ main(int argc, char *argv[])
 	int            opt;
 	char          *name;
 	char           type;
-	char          *end;
 	long int       major;
 	long int       minor;
 	char          *specials_file_name;
@@ -86,27 +100,27 @@ main(int argc, char *argv[])
 	setlocale(LC_ALL, "");
 #endif
 
-	program_name = argv[0];
+	_program_name = argv[0];
 
 	work_area = getenv("OPK_WORK_AREA");
 	if (work_area == NULL || work_area[0] == '\0') {
 		fprintf(stderr, _("%s: OPK_WORK_AREA environment variable not "
-					"set\n"), program_name);
+					"set\n"), _program_name);
 		fprintf(stderr, _("%s: Possibly building package dependent on "
 					"opkg-opk with opkbuild too old to use "
-					"it\n"), program_name);
+					"it\n"), _program_name);
 		fprintf(stderr, _("%s: Executing system mknod instead\n"),
-			program_name);
+			_program_name);
 		exec_argv = calloc(argc + 1, sizeof(*exec_argv));
 		if (exec_argv == NULL) {
 			fprintf(stderr, _("%s: Failed to allocate memory\n"),
-					program_name);
+					_program_name);
 			return EXIT_FAILURE;
 		}
 		exec_argv[0] = malloc(strlen(MKNOD) + 1);
 		if (exec_argv[0] == NULL) {
 			fprintf(stderr, _("%s: Failed to allocate memory\n"),
-					program_name);
+					_program_name);
 			free(exec_argv);
 			return EXIT_FAILURE;
 		}
@@ -117,7 +131,7 @@ main(int argc, char *argv[])
 		exec_argv[argc] = NULL;
 		execve(MKNOD, exec_argv, NULL);  /* Shouldn't return */
 		fprintf(stderr, _("%s: Failed to execute system mknod\n"),
-				program_name);
+				_program_name);
 		free(exec_argv[0]);
 		free(exec_argv);
 		return EXIT_FAILURE;
@@ -139,14 +153,14 @@ main(int argc, char *argv[])
 							&mode) != OPKG_OPK_OK) {
 					fprintf(stderr, _("%s: Invalid mode "
 								"\"%s\"\n"),
-							program_name, optarg);
+							_program_name, optarg);
 					return EXIT_FAILURE;
 				}
 				break;
 			default:
 				fprintf(stderr, _("%s: Warning: Unknown option:"
 							" \"%c\"\n"),
-						program_name, optopt);
+						_program_name, optopt);
 				return EXIT_FAILURE;
 		}
 	}
@@ -155,7 +169,7 @@ main(int argc, char *argv[])
 
 	if (argc < 2) {
 		fprintf(stderr, _("%s: Wrong number of operands\n"),
-				program_name);
+				_program_name);
 		return EXIT_FAILURE;
 	}
 	name = argv[0];
@@ -171,37 +185,29 @@ main(int argc, char *argv[])
 			if (argc != 2) {
 				fprintf(stderr, _("%s: Wrong number of "
 							"operands\n"),
-						program_name);
+						_program_name);
 				return EXIT_FAILURE;
 			}
 			if (mkfifo(name, mode) != 0) {
 				fprintf(stderr, _("%s: Failed to create link "
 							"\"%s\"\n"),
-						program_name, name);
+						_program_name, name);
 				return EXIT_FAILURE;
 			}
 			return EXIT_SUCCESS;
 		default:
 			fprintf(stderr, _("%s: Invalid node type \"%c\"\n"),
-						program_name, argv[1][0]);
+						_program_name, argv[1][0]);
 			return EXIT_FAILURE;
 	}
 
 	if (argc != 4) {
 		fprintf(stderr, _("%s: Wrong number of operands\n"),
-				program_name);
+				_program_name);
 		return EXIT_FAILURE;
 	}
-	major = strtol(argv[2], &end, 10);
-	if (*end != '\0') {
-		fprintf(stderr, _("%s: Invalid number \"%s\"\n"),
-				program_name, argv[2]);
-		return EXIT_FAILURE;
-	}
-	minor = strtol(argv[3], &end, 10);
-	if (*end != '\0') {
-		fprintf(stderr, _("%s: Invalid number \"%s\"\n"),
-				program_name, argv[3]);
+	if (_strtol_or_err(argv[2], &major) != OPKG_OPK_OK ||
+			_strtol_or_err(argv[3], &minor) != OPKG_OPK_OK) {
 		return EXIT_FAILURE;
 	}
 
@@ -209,14 +215,14 @@ main(int argc, char *argv[])
 			+ 1 /* "\0" */);
 	if (specials_file_name == NULL) {
 		fprintf(stderr, _("%s: Failed to allocate memory\n"),
-				program_name);
+				_program_name);
 		return EXIT_FAILURE;
 	}
 	specials_lock_name = malloc(strlen(work_area) + strlen("/specials~")
 			+ 1 /* "\0" */);
 	if (specials_lock_name == NULL) {
 		fprintf(stderr, _("%s: Failed to allocate memory\n"),
-				program_name);
+				_program_name);
 		free(specials_file_name);
 		return EXIT_FAILURE;
 	}
@@ -228,7 +234,8 @@ main(int argc, char *argv[])
 	 */
 	fd = open(name, O_CREAT | O_EXCL, mode);
 	if (fd < 0 || close(fd) < 0) {
-		fprintf(stderr, _("%s: Failed to create node\n"), program_name);
+		fprintf(stderr, _("%s: Failed to create node\n"),
+				_program_name);
 		free(specials_file_name);
 		free(specials_lock_name);
 		return EXIT_FAILURE;
@@ -236,12 +243,13 @@ main(int argc, char *argv[])
 
 	/* Acquire lock ("specials~"). */
 	for (timeout = _TIMEOUT; timeout > 0; --timeout) {
-		specials_fd = open(specials_lock_name, O_CREAT | O_EXCL, 0644);
+		specials_fd = open(specials_lock_name,
+				O_CREAT | O_EXCL | O_WRONLY, 0644);
 		if (specials_fd >= 0) {
 			goto opened;
 		}
 	}
-	fprintf(stderr, _("%s: Failed to lock specials file\n"), program_name);
+	fprintf(stderr, _("%s: Failed to lock specials file\n"), _program_name);
 	free(specials_file_name);
 	free(specials_lock_name);
 	unlink(name);
@@ -251,7 +259,7 @@ main(int argc, char *argv[])
 	specials_file = fdopen(specials_fd, "a");
 	if (specials_file == NULL) {
 		fprintf(stderr, _("%s: Failed to open specials file stream\n"),
-				program_name);
+				_program_name);
 		close(specials_fd);
 		free(specials_file_name);
 		free(specials_lock_name);
@@ -263,7 +271,7 @@ main(int argc, char *argv[])
 	if (stat(specials_file_name, &stat_buf) != 0) {
 		if (errno != ENOENT) {
 			fprintf(stderr, _("%s: Failed to stat specials file\n"),
-					program_name);
+					_program_name);
 			fclose(specials_file);
 			free(specials_file_name);
 			free(specials_lock_name);
@@ -274,7 +282,7 @@ main(int argc, char *argv[])
 				fputs("type     major     minor  name\n",
 					specials_file) < 0) {
 			fprintf(stderr, _("%s: Failed to write specials file\n")
-					, program_name);
+					, _program_name);
 			fclose(specials_file);
 			free(specials_file_name);
 			free(specials_lock_name);
@@ -285,7 +293,7 @@ main(int argc, char *argv[])
 	if (fprintf(specials_file, "%c  %8ld  %8ld  %s\n", type, major, minor,
 				name) < 0) {
 		fprintf(stderr, _("%s: Failed to write specials file\n"),
-				program_name);
+				_program_name);
 		fclose(specials_file);
 		free(specials_file_name);
 		free(specials_lock_name);
@@ -296,7 +304,7 @@ main(int argc, char *argv[])
 
 	if (rename(specials_lock_name, specials_file_name) != 0) {
 		fprintf(stderr, _("%s: Failed to move specials file\n"),
-				program_name);
+				_program_name);
 		free(specials_file_name);
 		free(specials_lock_name);
 		unlink(name);
--
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