id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,uname,nginx_version 1494,Null character in error.log,fffilimonov@…,,"With config like this: auth_basic ""Restricted""; auth_basic_user_file $host/htpasswd; If user not found in file nginx writes to error log string: {{{ 2018/02/26 15:19:33 [error] 85925#0: *3 user ""addd"" was not found in ""/Users/vf/nginx/127.0.0.1/htpasswd^@"", client: 127.0.0.1, server: , request: ""GET / HTTP/1.1"", host: ""127.0.0.1:8080"" }}} The issue only with variable in auth_basic_user_file path. With config like this no null char: auth_basic ""Restricted""; auth_basic_user_file /root/htpasswd; ngx_http_auth_basic_module.c {{{ ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, ""user \""%V\"" was not found in \""%V\"""", &r->headers_in.user, &user_file); }}} user_file - ngx_str_t So, it means there is a string inside user_file.data with null terminator. In debug log i can see: {{{ 2018/02/26 16:23:46 [debug] 93741#0: *1 access phase: 6 2018/02/26 16:23:46 [debug] 93741#0: *1 access phase: 7 2018/02/26 16:23:46 [debug] 93741#0: *1 http script var: ""127.0.0.1"" 2018/02/26 16:23:46 [debug] 93741#0: *1 http script copy: ""/htpasswd^@"" 2018/02/26 16:23:46 [debug] 93741#0: *1 http script fullname: ""/Users/vf/nginx/127.0.0.1/htpasswd^@"" 2018/02/26 16:23:46 [debug] 93741#0: *1 read: 9, 00007FFEE2FA7E00, 2048, 0 2018/02/26 16:23:46 [error] 93741#0: *1 user ""addd"" was not found in ""/Users/vf/nginx/127.0.0.1/htpasswd^@"", client: 127.0.0.1, server: , request: ""GET / HTTP/1.1"", host: ""127.0.0.1:8080"" }}} The null char we got from ngx_http_script.c. The simple fix is: {{{ ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, ""user \""%V\"" was not found in \""%s\"""", &r->headers_in.user, user_file.data); }}} But possible the problem is somewhere in other function which builds the path.",defect,closed,minor,,nginx-module,1.13.x,fixed,,fffilimonov@…,Darwin 17.3.0 Darwin Kernel Version 17.3.0: Thu Nov 9 18:09:22 PST 2017; root:xnu-4570.31.3~1/RELEASE_X86_64 x86_64,"nginx version: nginx/1.13.10 built by clang 9.0.0 (clang-900.0.38) configure arguments:"