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-rw-r--r--login-utils/ch-common.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/login-utils/ch-common.c b/login-utils/ch-common.c
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--- /dev/null
+++ b/login-utils/ch-common.c
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+/*
+ * chfn and chsh shared functions
+ *
+ * this program is free software. you can redistribute it and
+ * modify it under the terms of the gnu general public license.
+ * there is no warranty.
+ */
+
+#include <ctype.h>
+#include <string.h>
+
+#include "c.h"
+#include "nls.h"
+
+#include "ch-common.h"
+
+/*
+ * illegal_passwd_chars () -
+ * check whether a string contains illegal characters
+ */
+int illegal_passwd_chars(const char *str)
+{
+ const char illegal[] = ",:=\"\n";
+ const size_t len = strlen(str);
+ size_t i;
+
+ if (strpbrk(str, illegal))
+ return 1;
+ for (i = 0; i < len; i++) {
+ if (iscntrl(str[i]))
+ return 1;
+ }
+ return 0;
+}