By Aryan Bhatt and Gilvir Gill it is BIG

Features:

• Functioning shell that can execute commands of unlimited length using forking
• Can execute multiple commands in a line using ; separation (the number of commands is limited by your machine's RAM
• Implements basic redirection using >, <, and >>
• Can read in commands from an external file (using redirection)

Attempted:

• Multiple redirection
• Pipes

Bugs:

• Joshel is limited by INT_MAX (not BIG enough)

Functions:

int child_exec(char **);
char * read_in();
char ** split_cmd(char *);
char ** get_args(char *);
int custom_exec(char **);

int child_exec(char **);

Takes in a String array of arguments Forks, and the child runs the command using execvp Returns the child's pid

char * read_in();

Reads from whatever file is defined to be STDIN Uses realloc to create a sufficiently large buffer to hold the string If realloc fails due to lack of available memory space, it returns null Otherwise, it returns the string that was read in (null terminated)

char ** split_cmd(char *);

Takes in a null terminated raw input line Returns a String array that points to each individual command (separates using '\n' and ';' as delimiters

char ** get_args(char *);

Takes in a null terminated string Returns an array of pointers to the arguments, in order The returned pointer will NOT be the same as the inputed pointer

int custom_exec(char **);

Wrapper function for child_exec Accounts for <, >> and > Tries to account for |, but doesn't really work