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From fa1fa19951fdadd63f2b5df6224678f91753f260 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Wed, 28 Aug 2019 12:05:52 +0200
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Subject: [PATCH] shared/user-util: emit a warning on names with dots
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(cherry picked from commit 88e2ed0b5bf6f08f5a2d4d64b1fefdc7192b9aac)
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Related: #1848373
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---
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src/basic/user-util.c | 27 ++++++++++++++++++++-------
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1 file changed, 20 insertions(+), 7 deletions(-)
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diff --git a/src/basic/user-util.c b/src/basic/user-util.c
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index 03cbbc2503..359da08a83 100644
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--- a/src/basic/user-util.c
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+++ b/src/basic/user-util.c
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@@ -601,13 +601,26 @@ bool valid_user_group_name_full(const char *u, bool strict) {
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u[0] != '_')
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return false;
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- for (i = u+1; *i; i++)
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- if (!((*i >= 'a' && *i <= 'z') ||
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- (*i >= 'A' && *i <= 'Z') ||
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- (*i >= '0' && *i <= '9') ||
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- IN_SET(*i, '_', '-') ||
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- (!strict && *i == '.')))
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- return false;
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+ bool warned = false;
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+
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+ for (i = u+1; *i; i++) {
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+ if (((*i >= 'a' && *i <= 'z') ||
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+ (*i >= 'A' && *i <= 'Z') ||
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+ (*i >= '0' && *i <= '9') ||
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+ IN_SET(*i, '_', '-')))
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+ continue;
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+
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+ if (*i == '.' && !strict) {
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+ if (!warned) {
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+ log_warning("Bad user or group name \"%s\", accepting for compatibility.", u);
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+ warned = true;
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+ }
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+
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+ continue;
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+ }
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+
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+ return false;
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+ }
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sz = sysconf(_SC_LOGIN_NAME_MAX);
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assert_se(sz > 0);
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