Refactor message string, subsystem, and category truncation

src/common.c

@@ -53,7 +53,7 @@ flog_print_error(FlogError error) {
 void
 flog_usage(void) {
     printf(
-        "%s %s\n"
+        "%s v%d.%d.%d\n"
         "\n"
         "Usage:\n"
         "    %s [options] message\n"
@@ -73,12 +73,19 @@ flog_usage(void) {
         "    default, info, debug, error, fault\n"
         "\n",
         PROGRAM_NAME,
-        PROGRAM_VERSION,
+        PROGRAM_VERSION_MAJOR,
+        PROGRAM_VERSION_MINOR,
+        PROGRAM_VERSION_PATCH,
         PROGRAM_NAME
     );
 }
 
 void
 flog_version(void) {
-    printf("%s %s\n", PROGRAM_NAME, PROGRAM_VERSION);
+    printf("%s v%d.%d.%d\n",
+        PROGRAM_NAME,
+        PROGRAM_VERSION_MAJOR,
+        PROGRAM_VERSION_MINOR,
+        PROGRAM_VERSION_PATCH
+    );
 }

src/common.h

@@ -28,20 +28,28 @@
  *  Constants, helper functions, and error handling types for common operations.
  */
 
+/* Program information */
 #define PROGRAM_NAME "flog"
-#define PROGRAM_VERSION "v1.7.3"
+#define PROGRAM_VERSION_MAJOR 1
+#define PROGRAM_VERSION_MINOR 7
+#define PROGRAM_VERSION_PATCH 3
 
 /*! \brief An enumerated type representing error conditions. */
 typedef enum FlogErrorData {
+    /* General errors */
     FLOG_ERROR_NONE,
     FLOG_ERROR_ALLOC,
+
+    /* I/O errors */
     FLOG_ERROR_APPEND,
+    FLOG_ERROR_FILE,
+    FLOG_ERROR_STAT,
+
+    /* Configuration errors */
     FLOG_ERROR_LVL,
     FLOG_ERROR_MSG,
     FLOG_ERROR_OPTS,
-    FLOG_ERROR_SUBSYS,
-    FLOG_ERROR_FILE,
-    FLOG_ERROR_STAT,
+    FLOG_ERROR_SUBSYS
 } FlogError;
 
 /*! \brief Print usage information to stdout stream. */

src/config.c

@@ -38,9 +38,9 @@
 
 bool is_regular_file_or_pipe(int fd, FlogError *error);
 
-const int subsystem_len = 257;
-const int category_len  = 257;
-const int message_len   = 8193;
+const size_t subsystem_len = 128;
+const size_t category_len  = 128;
+const size_t message_len   = 1024;
 
 FlogConfigLevel flog_config_parse_level(const char *str);
 
@@ -205,7 +205,7 @@ flog_config_set_subsystem(FlogConfig *config, const char *subsystem) {
     assert(subsystem != NULL);
 
     if (strlcpy(config->subsystem, subsystem, subsystem_len) >= subsystem_len) {
-        fprintf(stderr, "%s: subsystem name truncated to %d bytes\n", PROGRAM_NAME, subsystem_len - 1);
+        fprintf(stderr, "%s: subsystem name truncated to %zu bytes\n", PROGRAM_NAME, subsystem_len - 1);
     }
 }
 
@@ -222,7 +222,7 @@ flog_config_set_category(FlogConfig *config, const char *category) {
     assert(category != NULL);
 
     if (strlcpy(config->category, category, category_len) >= category_len) {
-        fprintf(stderr, "%s: category name truncated to %d bytes\n", PROGRAM_NAME, category_len - 1);
+        fprintf(stderr, "%s: category name truncated to %zu bytes\n", PROGRAM_NAME, category_len - 1);
     }
 }
 
@@ -293,7 +293,7 @@ flog_config_set_message(FlogConfig *config, const char *message) {
     assert(message != NULL);
 
     if (strlcpy(config->message, message, message_len) >= message_len) {
-        fprintf(stderr, "%s: message string was truncated to %d bytes\n", PROGRAM_NAME, message_len - 1);
+        fprintf(stderr, "%s: message truncated to %zu bytes\n", PROGRAM_NAME, message_len - 1);
     }
 }
 
@@ -320,7 +320,7 @@ flog_config_set_message_from_args(FlogConfig *config, const char **args) {
     }
 
     if (message_truncated) {
-        fprintf(stderr, "%s: message was truncated to %d bytes\n", PROGRAM_NAME, message_len - 1);
+        fprintf(stderr, "%s: message truncated to %zu bytes\n", PROGRAM_NAME, message_len - 1);
     }
 }
 
@@ -329,10 +329,26 @@ flog_config_set_message_from_stream(FlogConfig *config, FILE *restrict stream) {
     assert(config != NULL);
     assert(stream != NULL);
 
-    if (fread(config->message, sizeof(char), message_len, stream) >= message_len) {
-        fprintf(stderr, "%s: message was truncated to %d bytes\n", PROGRAM_NAME, message_len - 1);
-        config->message[message_len - 1] = '\0';
+    config->message[0] = '\0';
+
+    // Read message from stream
+    size_t bytes_read = fread(config->message, sizeof(char), message_len - 1, stream);
+    if (ferror(stream)) {
+        fprintf(stderr, "%s: error reading message from stream\n", PROGRAM_NAME);
+        clearerr(stream);
+        return;
+    }
+
+    // Ensure safe bounds and null termination
+    bytes_read = (bytes_read >= message_len - 1) ? message_len - 1 : bytes_read;
+    config->message[bytes_read] = '\0';
+
+    // Check for message truncation
+    char c;
+    if (fread(&c, sizeof(char), 1, stream) > 0) {
+        fprintf(stderr, "%s: message truncated to %zu bytes\n", PROGRAM_NAME, message_len - 1);
     }
+    clearerr(stream);
 }
 
 FlogConfigMessageType

src/config.h

@@ -33,9 +33,9 @@
 #include <stdio.h>
 #include "common.h"
 
-extern const int subsystem_len;
-extern const int category_len;
-extern const int message_len;
+extern const size_t subsystem_len;
+extern const size_t category_len;
+extern const size_t message_len;
 
 /*! \brief An enumerated type representing the log level. */
 typedef enum FlogConfigLevelData {

test/test_common.c

@@ -109,7 +109,7 @@ flog_usage_succeeds(void **state) {
 
     char expected_string[1024] = {0};
     sprintf(expected_string,
-        "%s %s\n"
+        "%s v%d.%d.%d\n"
         "\n"
         "Usage:\n"
         "    %s [options] message\n"
@@ -129,7 +129,9 @@ flog_usage_succeeds(void **state) {
         "    default, info, debug, error, fault\n"
         "\n",
         PROGRAM_NAME,
-        PROGRAM_VERSION,
+        PROGRAM_VERSION_MAJOR,
+        PROGRAM_VERSION_MINOR,
+        PROGRAM_VERSION_PATCH,
         PROGRAM_NAME
     );
 
@@ -143,7 +145,12 @@ flog_version_succeeds(void **state) {
     UNUSED(state);
 
     char expected_string[ERROR_STRING_LEN] = {0};
-    sprintf(expected_string, "%s %s\n", PROGRAM_NAME, PROGRAM_VERSION);
+    sprintf(expected_string, "%s v%d.%d.%d\n",
+        PROGRAM_NAME,
+        PROGRAM_VERSION_MAJOR,
+        PROGRAM_VERSION_MINOR,
+        PROGRAM_VERSION_PATCH
+    );
 
     flog_version();