Add support for Ctrl+C

Author: SebaOfficial

include/lsh.h

@@ -10,10 +10,8 @@
 void lsh_loop(void);
 
 /**
- * @brief Signal handler for SIGINT (Ctrl+C). Forces the user to use 'exit' to quit the shell.
- * @param signum The signal number (should be SIGINT).
- * @return void.
+ * @brief Prints the prompt line. 
  */
-void sigint_handler(int signum);
+void lsh_print_prompt(void);
 
 #endif

include/lsh_helpers.h

@@ -13,4 +13,10 @@ char *get_user_at_hostname();
  */
 char *get_current_dir();
 
+/**
+ * @brief Signal handler for SIGINT (Ctrl+C).
+ * @param signum The signal number (should be SIGINT).
+ */
+void sigint_handler(int signum);
+
 #endif

src/lsh.c

@@ -82,7 +82,7 @@ int lsh_execute(char **args)
 char *lsh_read_line(void)
 {
     char *line = NULL;
-    size_t bufsize = 0; // have getline allocate a buffer for us
+    size_t bufsize = 0;
     ssize_t bytes_read;
 
     bytes_read = getline(&line, &bufsize, stdin);
@@ -153,21 +153,25 @@ char **lsh_split_line(char *line)
     return tokens;
 }
 
+void lsh_print_prompt(void)
+{
+    char *user_information = get_user_at_hostname();
+    char *cwd = get_current_dir();
+    printf("%s:%s> ", user_information, cwd);
+    fflush(stdout);
+    free(user_information);
+    free(cwd);
+}
+
 void lsh_loop(void)
 {
     char *line;
     char **args;
     int status;
-    char *cwd;
-    char *user_information = get_user_at_hostname();
 
     do
     {
-
-        cwd = get_current_dir();
-
-        printf("%s:%s> ", user_information, cwd);
-        fflush(stdout);
+        lsh_print_prompt();
 
         line = lsh_read_line();
 
@@ -183,9 +187,6 @@ void lsh_loop(void)
 
         free(line);
         free(args);
-        free(cwd);
 
     } while (status);
-
-    free(user_information);
 }

src/lsh_helpers.c

@@ -5,12 +5,14 @@
 #include <errno.h>
 #include <stdbool.h>
 #include "lsh_colors.h"
+#include "lsh.h"
 
-/**
- * @brief Signal handler for SIGINT.
- * @param signum The signal number.
- */
-void sigint_handler(int signum) {}
+void sigint_handler(int signum)
+{
+    (void)signum;
+    printf("\n");
+    lsh_print_prompt();
+}
 
 /**
  * @return Wheter the terminal supports ANSI escape codes or not.

src/main.c

@@ -2,6 +2,7 @@
 #include <stdlib.h>
 #include <signal.h>
 #include "lsh.h"
+#include "lsh_helpers.h"
 
 int main(int argc, char **argv)
 {