createcmd.c

#include "createcmd.h"

// creates an `execcmd` struct to store
// the args and environ vars of the command
struct cmd *
exec_cmd_create(char *buf_cmd)
{
	struct execcmd *e;

	e = (struct execcmd *) calloc(1, sizeof(*e));

	e->type = EXEC;
	strcpy(e->scmd, buf_cmd);

	return (struct cmd *) e;
}

// creates a `backcmd` struct to store the
// background command to be executed
struct cmd *
back_cmd_create(struct cmd *c)
{
	struct backcmd *b;

	b = (struct backcmd *) calloc(1, sizeof(*b));

	b->type = BACK;
	strcpy(b->scmd, c->scmd);
	b->c = c;

	return (struct cmd *) b;
}

// encapsulates two commands into one pipe struct
struct cmd *
pipe_cmd_create(struct cmd *left, struct cmd *right)
{
	if (!right)
		return left;

	struct pipecmd *p;

	p = (struct pipecmd *) calloc(1, sizeof(*p));

	p->type = PIPE;
	p->leftcmd = left;
	p->rightcmd = right;

	return (struct cmd *) p;
}