C Code Examples: File IO Tests

Test if File Exists

int fileexists(const char *filename) {
    // Test if the file exists
    FILE *fileptr;
    fileptr = fopen(filename, "r");
    if (fileptr != NULL) {
        fclose(fileptr);
        return 1;
    }
    return 0;
}

Test if File is Writable

int filewritable(const char *filename) {
    // Test if the file is writable
    FILE *fileptr;
    fileptr = fopen(filename, "wb");
    if (fileptr != NULL) {
        fclose(fileptr);
        return 1;
    }
    return 0;
}

Further Reading

• Programming and Development - https://dcjtech.info/topic/programming-and-development/
• C Programming Article Forum - https://dcjtech.info/forum/articles/programming/c-c-and-c/
• C Code Examples: Array Rotations - https://dcjtech.info/topic/c-code-examples-array-rotations/
• C Code Examples: Return System Endianness - https://dcjtech.info/topic/c-code-examples-return-system-endianness/
• C Code Examples: Stack and Queue Datatype - https://dcjtech.info/topic/c-code-examples-stack-and-queue-datatype/