S_ISREG           155 os/unix/ngx_files.h #define ngx_is_file(sb)          (S_ISREG((sb)->st_mode))
S_ISREG           241 os/unix/ngx_files.h     (((dir)->type) ? ((dir)->type == DT_REG) : (S_ISREG((dir)->info.st_mode)))
S_ISREG           248 os/unix/ngx_files.h #define ngx_de_is_file(dir)      (S_ISREG((dir)->info.st_mode))