From 29dfe75fe93e722c38f7a28d2ebff0d98f3d8796 Mon Sep 17 00:00:00 2001 From: Miles Bader Date: Wed, 28 Feb 1996 21:14:50 +0000 Subject: Initial revision --- libshouldbeinlibc/canon-host.c | 58 +++++++++++++++++++++++++++ libshouldbeinlibc/maptime.c | 89 ++++++++++++++++++++++++++++++++++++++++++ libshouldbeinlibc/maptime.h | 46 ++++++++++++++++++++++ 3 files changed, 193 insertions(+) create mode 100644 libshouldbeinlibc/canon-host.c create mode 100644 libshouldbeinlibc/maptime.c create mode 100644 libshouldbeinlibc/maptime.h diff --git a/libshouldbeinlibc/canon-host.c b/libshouldbeinlibc/canon-host.c new file mode 100644 index 00000000..ea6c7195 --- /dev/null +++ b/libshouldbeinlibc/canon-host.c @@ -0,0 +1,58 @@ +/* Host name canonicalization + + Copyright (C) 1995, 1996 Free Software Foundation, Inc. + + Written by Miles Bader + + [This file is from sh-utils/lib; maybe something can be done to share them.] + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include +#include +#include +#include +#include + +/* Returns the canonical hostname associated with HOST (allocated in a static + buffer), or 0 if it can't be determined. */ +char * +canon_host (char *host) +{ + struct hostent *he = gethostbyname (host); + + if (he) + { + char *addr = 0; + + /* Try and get an ascii version of the numeric host address. */ + switch (he->h_addrtype) + { + case AF_INET: + addr = inet_ntoa (*(struct in_addr *)he->h_addr); + break; + } + + if (addr && strcmp (he->h_name, addr) == 0) + /* gethostbyname() cheated! Lookup the host name via the address + this time to get the actual host name. */ + he = gethostbyaddr (he->h_addr, he->h_length, he->h_addrtype); + + if (he) + return he->h_name; + } + + return 0; +} diff --git a/libshouldbeinlibc/maptime.c b/libshouldbeinlibc/maptime.c new file mode 100644 index 00000000..d8cf22f7 --- /dev/null +++ b/libshouldbeinlibc/maptime.c @@ -0,0 +1,89 @@ +/* Support for mach's mapped time + + Copyright (C) 1996 Free Software Foundation, Inc. + + Written by Miles Bader + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include +#include +#include + +#include "maptime.h" + +/* Return the mach mapped time page in MTIME. If USE_MACH_DEV is false, then + the hurd time device DEV_NAME, or "/dev/time" if DEV_NAME is 0, is + used. If USE_MACH_DEV is true, the mach device DEV_NAME, or "time" if + DEV_NAME is 0, is used; this is a privileged operation. The mapped time + may be converted to a struct timeval at any time using maptime_read. */ +error_t +maptime_map (int use_mach_dev, char *dev_name, + volatile struct mapped_time_value **mtime) +{ + error_t err; + device_t device; + mach_port_t mobj; + + if (use_mach_dev) + { + mach_port_t device_master; + + err = get_privileged_ports (0, &device_master); + if (! err) + { + err = device_open (device_master, 0, dev_name ?: "time", &device); + mach_port_deallocate (mach_task_self (), device_master); + } + } + else + { + string_t name; + int class, flags = 0; + size_t block_size; + off_t *runs = 0; + char *misc = 0; + size_t runs_len = 0, misc_len = 0; + file_t node = file_name_lookup (dev_name ?: "/dev/time", 0, 0); + + if (node == MACH_PORT_NULL) + return errno; + + err = file_get_storage_info (node, &class, &runs, &runs_len, &block_size, + name, &device, &misc, &misc_len, &flags); + if (!err && runs_len) + vm_deallocate (mach_task_self (), (vm_address_t)runs, runs_len); + if (!err && misc_len) + vm_deallocate (mach_task_self (), (vm_address_t)misc, misc_len); + + mach_port_deallocate (mach_task_self (), node); + } + + if (err) + return err; + + err = device_map (device, VM_PROT_READ, 0, sizeof *mtime, &mobj, 0); + if (! err) + { + err = + vm_map (mach_task_self (), (vm_address_t *)mtime, sizeof *mtime, 0, 1, + mobj, 0, 0, VM_PROT_READ, VM_PROT_READ, VM_INHERIT_NONE); + mach_port_deallocate (mach_task_self (), mobj); + } + + mach_port_deallocate (mach_task_self (), device); + + return err; +} diff --git a/libshouldbeinlibc/maptime.h b/libshouldbeinlibc/maptime.h new file mode 100644 index 00000000..244cbcf1 --- /dev/null +++ b/libshouldbeinlibc/maptime.h @@ -0,0 +1,46 @@ +/* Support for mach's mapped time + + Copyright (C) 1996 Free Software Foundation, Inc. + + Written by Miles Bader + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#ifndef __MAPTIME_H__ +#define __MAPTIME_H__ + +#include + +/* Return the mach mapped time page in MTIME. If USE_MACH_DEV is false, then + the hurd uptime device DEV_NAME, or "/dev/uptime" if DEV_NAME is 0, is + used. If USE_MACH_DEV is true, the mach device DEV_NAME, or "time" if + DEV_NAME is 0, is used; this is a privileged operation. The mapped uptime + may be converted to a struct timeval at any time using read_uptime. */ +error_t maptime_map (int use_mach_dev, char *dev_name, + volatile struct mapped_time_value **mtime); + +/* Read the current time from MTIME into TV. This should be very fast. */ +static inline void +maptime_read (volatile struct mapped_time_value *mtime, struct timeval *tv) +{ + do + { + tv->tv_sec = mtime->seconds; + tv->tv_usec = mtime->microseconds; + } + while (tv->tv_sec != mtime->check_seconds); +} + +#endif /* __MAPTIME_H__ */ -- cgit v1.2.3