added fexHEADmaster

1 files changed, 34 insertions, 0 deletions

diff --git a/scripts/fex.c b/scripts/fex.c
new file mode 100644
index 0000000..7abdc5f
--- /dev/null
+++ b/scripts/fex.c
@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+// Grab the file extension of the filename passed.
+// TODO: current just does it until the first. Add in variations to grab all,
+// only specific entries like .tar.gz, etc.
+
+void usage(void)
+{
+    printf("fex: returns the extension of the filename passed\n");
+    exit(0);
+}
+
+int main(int argc, char **argv) 
+{
+    if (argc <= 1)
+	usage();
+
+    const char *file = argv[1]; // FIXME: unsafe.
+    size_t len = strlen(file);
+    if (len == 0)
+	fprintf(stderr, "length of file cannot be zero\n"), exit(-1);
+
+    for (len--; len != 0; len--)
+    {
+	if (file[len] == '.')
+	{
+	    printf("%s\n", file + len + 1);
+	    return 0;
+	}
+    }
+    return 0;
+}