add groups and id commands

1 files changed, 32 insertions, 0 deletions

diff --git a/src/commands/groups.c b/src/commands/groups.c
new file mode 100644
index 0000000..1969edf
--- /dev/null
+++ b/src/commands/groups.c
@@ -0,0 +1,32 @@
+#include "../command.h"
+
+#include <grp.h>
+#include <pwd.h>
+#include <unistd.h>
+
+COMMAND_EMPTY(groups) {
+
+    __uid_t uid = getuid();
+    
+    struct passwd* pw = getpwuid(uid);
+    if(pw == NULL){
+        perror("error: failed to fetch groups: ");
+    }
+    
+    int ngroups = 0;
+    getgrouplist(pw->pw_name, pw->pw_gid, NULL, &ngroups);
+    
+    __gid_t groups[ngroups];
+    getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups);
+    
+    for (int i = 0; i < ngroups; i++){
+        struct group* gr = getgrgid(groups[i]);
+        if(gr == NULL){
+            perror("error: failed to fetch groups: ");
+        }
+        printf("%s ",gr->gr_name);
+    }
+    printf("\n");
+
+    return EXIT_SUCCESS;
+}