environment vairables. set and get

1 files changed, 65 insertions, 41 deletions

diff --git a/src/lsh_builtins.c b/src/lsh_builtins.c
index 34aced5..33b1b88 100644
--- a/src/lsh_builtins.c
+++ b/src/lsh_builtins.c
@@ -7,85 +7,109 @@
 #include <unistd.h>
 
 /*
-  Function Declarations for builtin shell commands:
- */
+   Function Declarations for builtin shell commands:
+   */
 
 int lsh_cd(char **args);
 int lsh_help(char **args);
 int lsh_exit(char **args);
+int export(char **args);
 
 /*
-  List of builtin commands, followed by their corresponding functions.
- */
+   List of builtin commands, followed by their corresponding functions.
+   */
 char *builtin_str[] = {
-  "cd",
-  "help",
-  "exit"
+    "cd",
+    "help",
+    "exit",
+    "export"
 };
 
 int (*builtin_func[]) (char **) = {
-  &lsh_cd,
-  &lsh_help,
-  &lsh_exit
+    &lsh_cd,
+    &lsh_help,
+    &lsh_exit,
+    &export
 };
 
 int lsh_num_builtins() {
-  return sizeof(builtin_str) / sizeof(char *);
+    return sizeof(builtin_str) / sizeof(char *);
 }
 
 /*
-  Builtin function implementations.
-*/
+   Builtin function implementations.
+   */
 int lsh_cd(char **args)
 {
-  if (args[1] == NULL) {
-    fprintf(stderr, "lsh: expected argument to \"cd\"\n");
-  } else {
-    if (chdir(args[1]) != 0) {
-      perror("lsh");
+    if (args[1] == NULL) {
+        fprintf(stderr, "lsh: expected argument to \"cd\"\n");
+    } else {
+        if (chdir(args[1]) != 0) {
+            perror("lsh");
+        }
     }
-  }
-  return 1;
+    return 1;
 }
 
 int lsh_help(char **args)
 {
-  int i;
-  printf("Stephen Brennan's LSH\n");
-  printf("Type program names and arguments, and hit enter.\n");
-  printf("The following are built in:\n");
+    int i;
+    printf("Stephen Brennan's LSH\n");
+    printf("Type program names and arguments, and hit enter.\n");
+    printf("The following are built in:\n");
 
-  for (i = 0; i < lsh_num_builtins(); i++) {
-    printf("  %s\n", builtin_str[i]);
-  }
+    for (i = 0; i < lsh_num_builtins(); i++) {
+        printf("  %s\n", builtin_str[i]);
+    }
 
-  printf("Use the man command for information on other programs.\n");
-  return 1;
+    printf("Use the man command for information on other programs.\n");
+    return 1;
 }
 
 int lsh_exit(char **args)
 {
-  return 0;
+    return 0;
+}
+
+int export(char **args){
+    char *token;
+    int position = 0;
+    char *key = NULL;
+    char *value = NULL;
+
+    token = strtok(args[1], "=\r\n");
+    while (token != NULL) {
+        if(position == 0){
+            key=token;
+        } else if(position == 1){
+            value=token;
+        }
+
+        position++;
+        token = strtok(NULL, "=\r\n");
+    }
+    setenv(key,value,1);
+
+    return 1;
 }
 
 
 
 int lsh_execute(char **args)
 {
-  int i;
+    int i;
 
-  if (args[0] == NULL) {
-    // An empty command was entered.
-    return 1;
-  }
+    if (args[0] == NULL) {
+        // An empty command was entered.
+        return 1;
+    }
 
-  for (i = 0; i < lsh_num_builtins(); i++) {
-    if (strcmp(args[0], builtin_str[i]) == 0) {
-      return (*builtin_func[i])(args);
+    for (i = 0; i < lsh_num_builtins(); i++) {
+        if (strcmp(args[0], builtin_str[i]) == 0) {
+            return (*builtin_func[i])(args);
+        }
     }
-  }
 
-  return lsh_launch(args);
+    return lsh_launch(args);
 }
-
 #endif