add env path execution

1 files changed, 44 insertions, 2 deletions

diff --git a/smash/exec.c b/smash/exec.c
index cd18ca4..11620a5 100644
--- a/smash/exec.c
+++ b/smash/exec.c
@@ -9,6 +9,8 @@
 #include "../lib/sys/exit.h"
 #include "../lib/cstr/cstr.h"
 #include "../lib/io/io.h"
+#include "../lib/env/env.h"
+#include "../lib/malloc/malloc.h"
 
 #include "parser.h"
 #include "builtin.h"
@@ -22,11 +24,43 @@ void print_call(char **argv)
 	}
 }
 
+void __execenv(const char **argv)
+{
+	const char *path = getenv("PATH");
+	const char *end;
+	char *filename;
+
+	while (*path) {
+		end = path;
+
+		while (*end && *end != ':') ++end;
+
+		filename = malloc((end - path) + cstr_length(argv[0]) + 2);
+
+		for (int i = 0; i < end - path; ++i)
+			filename[i] = path[i];
+
+		filename[end - path] = '/';
+
+		for (int i = 0; i < cstr_length(argv[0]) + 1; ++i)
+			filename[(end - path) + i + 1] = argv[0][i];
+
+		execve(filename, argv, getenvp());
+		free(filename);
+
+		path = end;
+
+		if (*path == ':')
+			++path;
+	}
+
+	execve(argv[0], argv, getenvp());
+}
+
 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];
@@ -57,7 +91,7 @@ void exec(char *line)
 			close(pipefd[1][PIPE_OUT]);
 			close(pipefd[1][PIPE_IN]);
 
-			execve(argv[0], argv, envp);
+			__execenv(argv);
 			wstdf("command not found: %s\n", argv[0]);
 			exit(-1);
 		}
@@ -80,3 +114,11 @@ void exec(char *line)
 	free_expression(exps);
 }
 
+#ifdef EXEC_UNIT_TEST
+
+int main() {
+	char *argv[] = { "ls" };
+	__execenv(argv);
+}
+
+#endif