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#include "exec.h"
#include "../lib/sys/execve.h"
#include "../lib/sys/fork.h"
#include "../lib/sys/wait4.h"
#include "../lib/sys/pipe.h"
#include "../lib/sys/dup2.h"
#include "../lib/sys/close.h"
#include "../lib/sys/io.h"
#include "../lib/sys/exit.h"
#include "../lib/cstr/cstr.h"
#include "parser.h"
#include "builtin.h"
void print_call(char **argv)
{
while (*argv) {
write(STDOUT_FD, *argv, cstr_length(*argv));
write(STDOUT_FD, "\n", 1);
++argv;
}
}
void exec(char *line)
{
expression_list_t *exps = new_expression_from_line(line);
expression_list_t *exp = exps;
char **envp = { 0 };
int pid;
int pipefd[2][2];
pipefd[0][PIPE_IN] = STDOUT_FD;
pipefd[0][PIPE_OUT] = STDIN_FD;
while (exp) {
char **argv = new_argv(exp->call);
pipe(pipefd[1]);
if (has_builtin_with_name(argv[0])) {
run_builtin(argv[0], (const char**)argv);
break;
}
pid = fork();
if (pid == 0) {
if (pipefd[0][PIPE_OUT] != STDIN_FD) {
dup2(pipefd[0][PIPE_OUT], STDIN_FD);
close(pipefd[0][PIPE_OUT]);
close(pipefd[0][PIPE_IN]);
}
if (exp->next)
dup2(pipefd[1][PIPE_IN], STDOUT_FD);
close(pipefd[1][PIPE_OUT]);
close(pipefd[1][PIPE_IN]);
execve(argv[0], argv, envp);
write(STDOUT_FD, "command not found: ", 19);
write(STDOUT_FD, argv[0], cstr_length(argv[0]));
write(STDOUT_FD, "\n", 1);
exit(-1);
}
if (pipefd[0][PIPE_OUT] != STDIN_FD) {
close(pipefd[0][PIPE_IN]);
close(pipefd[0][PIPE_OUT]);
}
close(pipefd[1][PIPE_IN]);
pipefd[0][0] = pipefd[1][0];
pipefd[0][1] = pipefd[1][1];
free_argv(argv);
wait4(pid, 0, 0);
exp = exp->next;
}
free_expression(exps);
}
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