Warning: comparison with string literals results in unspecified behaviour

Question

I am starting a project of writing a simplified shell for linux in C. I am not at all proficient with C nor with Linux that\'s exactly the reason I decided it would be a goo

Answer 1

1. clang has advantages in error reporting & recovery.

   $ clang errors.c
   errors.c:36:21: warning: result of comparison against a string literal is unspecified (use strcmp instead)
           if (args[i] == "&") //WARNING HERE
                       ^~ ~~~
               strcmp( ,     ) == 0
   errors.c:38:26: warning: result of comparison against a string literal is unspecified (use strcmp instead)
           else if (args[i] == "<") //WARNING HERE
                            ^~ ~~~
                    strcmp( ,     ) == 0
   errors.c:44:26: warning: result of comparison against a string literal is unspecified (use strcmp instead)
           else if (args[i] == ">") //WARNING HERE
                            ^~ ~~~
                    strcmp( ,     ) == 0
   

   It suggests to replace x == y by strcmp(x,y) == 0.

2. gengetopt writes command-line option parser for you.