2 files changed, 42 insertions, 0 deletions
diff --git a/myfind/group_belong/Makefile b/myfind/group_belong/Makefile
new file mode 100644
index 0000000..b5672f4
--- /dev/null
+++ b/myfind/group_belong/Makefile
@@ -0,0 +1,17 @@
+CC = gcc CFLAGS = -std = c99 - pedantic - Werror - Wall - Wextra
+    - Wvla
+
+        SRC = group_belong.c OBJ = $(SRC
+                                     :.c =.o)
+
+                                       all
+    : $(OBJ) $(CC)
+      - o group_belong $(OBJ)
+
+            $(OBJ)
+    : $(SRC)
+
+          .PHONY
+    : clean
+
+          clean : $(RM) $(OBJ) group_belong
diff --git a/myfind/group_belong/group_belong.c b/myfind/group_belong/group_belong.c
new file mode 100644
index 0000000..20302d5
--- /dev/null
+++ b/myfind/group_belong/group_belong.c
@@ -0,0 +1,25 @@
+#include <grp.h>
+#include <stdio.h>
+#include <sys/stat.h>
+
+int main(int argc, char **argv)
+{
+    if (argc != 3)
+        return 2;
+
+    struct group *g = getgrnam(argv[2]);
+    if (!g)
+    {
+        printf("group %s does not exist\n", argv[2]);
+        return 0;
+    }
+    struct stat s;
+    stat(argv[1], &s);
+
+    printf("%s does ", argv[1]);
+    if (s.st_gid != g->gr_gid)
+        printf("not ");
+    printf("belong to group %s\n", argv[2]);
+
+    return 0;
+}