chore: chvt_str into chvt.c

include/chvt.h

@@ -14,5 +14,12 @@
  * @return int non-negative value on success
  */
 int chvt(int n);
+/**
+ * @brief change foreground virtual terminal to `str`
+ *
+ * @param str virtual terminal number (string)
+ * @return int non-negative value on success
+ */
+int chvt_str(char* str);
 
 #endif

src/chvt.c

@@ -1,10 +1,28 @@
+#include <errno.h>
+#include <limits.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 #include <chvt.h>
 
 static char *vterms[] = {"/dev/tty", "/dev/tty0", "/dev/vc/0", "/dev/systty",
                          "/dev/console"};
 
+int chvt_str(char *str) {
+  char *err;
+  errno = 0;
+  long i = strtol(str, &err, 10);
+  if (errno) {
+    perror("strol");
+    return -1;
+  }
+  // I'm not gonna elaborate on this....
+  if (i > INT_MAX || i < INT_MIN || *err)
+    return -1;
+
+  return chvt((int)i);
+}
+
 int chvt(int n) {
   fprintf(stderr, "activating vt %d\n", n);
   char c = 0;

src/main.c

@@ -1,5 +1,3 @@
-#include <errno.h>
-#include <limits.h>
 #include <pwd.h>
 #include <stdbool.h>
 #include <sys/ioctl.h>
@@ -12,20 +10,6 @@
 #include <ui.h>
 #include <users.h>
 
-int chvt_str(char *str) {
-  char *err;
-  long i = strtol(str, &err, 10);
-  if (errno) {
-    perror("strol");
-    return -1;
-  }
-  // I'm not gonna elaborate on this....
-  if (i > INT_MAX || i < INT_MIN || *err)
-    return -1;
-
-  return chvt((int)i);
-}
-
 int main(int argc, char *argv[]) {
   if (argc == 2)
     chvt_str(argv[1]);