is an administrator by inspecting user token.
(main): Drop fetching caller info from logonserver. Only fetch
server from environment when trying to change password for own
account. Drop admin check entirely in case of doing account
maintainance. Otherwise replace check for admin by result of
caller_is_admin call.
* passwd.c: Use mbstowcs instead of MultiByteToWideChar throughout.
(main): Call setlocale. Fix a bug in fetching the logon server from
the environment.
(set_entry_point_break): Rename from get_entry_point.
(print_dlls): Rename from print_dlls_and_kill_inferior. Avoid printing
specific dll name if we're looking at a dll.
(report): Always dump dlls on process exit. Don't allow thread creation.
Accommodate get_entry_point rename.
(start_process): Start process with DEBUG_ONLY_THIS_PROCESS.
(longopts): Eliminate "dll" option.
(main): Ditto.
* ldd.cc: Use wide character Win32 paths throughout.
(load_dll): Fix size expression (add fn) in realloc.
(get_module_filename): Generalized wrapper function which avoid path length
restrictions.
(load_dll): Handle special-case of inspecting a DLL.
(start_process): Accept an output parameter "isdll". Detect when file to start
is a DLL and start a wrapper instead.
(print_dlls_and_kill_inferior): When dealing with a DLL, avoid printing
everything before the DLL itself first appears. (This is not strictly correct
and should be fixed eventually)
(report): Deal with DLLs. Don't set a breakpoint for DLLs, just let captive
ldd process terminate normally. Pass dll info to print_dlls_and_kill_inferior.
(main): Handle special-case "--dll" option by loading the DLL and exiting.
to WCHAR win32 path, including long path conversion if necessary.
* cygcheck.cc: Use class wide_path throughout to call Win32 functions
taking potentially long filenames.
(display_error): Use snprintf rather than sprintf.
(display_error_fmt): Ditto.
(dump_sysinfo): Use FindFirstFileW/FindNextFileW.
* cygpath.cc: Use class wide_path throughout to call Win32 functions
taking potentially long filenames.
(get_device_name): Raise buffer size to take long pathnames.
(get_short_paths): Convert to using GetShortPathNameW.
(get_short_name): Ditto.
(get_long_path_name_w32impl): Convert to equivalent of GetLongPathNameW.
(get_long_name): Convert to using GetLongPathNameW.
(do_sysfolders): Raise buffer size for POSIX pathname to PATH_MAX.
(do_pathconv): In case of POSIX->Win32 conversion, convert to wchar_t
Win32 path name and drop long pathname prefix if possible.
(main): Call setlocale to accommodate wide char/multibyte conversions.
(start_process): Change to expect windows filename as input.
(tocyg): New function - convert cygwin fn to windows fn.
(print_dlls_and_kill_inferior): Accept extra argument denoting whether to open
input and look for nonexistent DLLs. Use tocyg to convert filename and pass it
to start_process.
(report): Flag when an DLL-not-found exception occurs and pass this information
to print_dlls_and_kill_inferior.
(filelist): New structure.
(saw_file): New function.
(dump_import_directory): Ditto.
(map_file): Ditto.
(skip_dos_stub): Ditto.
(get_directory_index): Ditto.
(process_file): Ditto.
* cygcheck.cc (scan_registry): Take additional parameter and add code
to avoid recursion in Wow6432Node subkey. Rename variable cygnus to
cygwin. Scan for "Cygwin" instead of for "cygnus" substring.
(dump_sysinfo): Drop unused calls to scan_registry. Drop scanning
HKEY_CURRENT_CONFIG.
(opts): Add -R option.
(usage): Add text for -R/--reg-store-pwd option.
(main): Fix size of local user and password string arrays.
Handle -R option.
* utils.sgml: Add text for passwd -R/--reg-store-pwd option.
(display_internet_error): Use proper format specifier for DWORD.
(environ): Remove unneeded declaration.
(main): Use brace around nested if to avoid an overly-helpful compiler warning.
* dump_setup.cc (parse_filename): Reorganize nested if to avoid an
overly-helpful compiler warning.
* path.cc (GUID_shortcut): Use braces around part of initializer which needs
them.
(conv_fstab_spaces): Parenthesize assignment in while loop to avoid a compiler
warning.
(struct opt): Make static.
* ps.cc (main): Reorganize nested if to avoid an overly-helpful compiler
warning.
* regtool.cc: Make some anonymous structs static to avoid a compiler warning.
* ssp.c (lookup_thread_id): Initialize *tix to zero to avoid potential
uninitialized use.
* strace.cc (add_child): Use proper format specifier for DWORD.
(remove_child): Ditto.
(proc_child): Ditto.
print_current is set and group SID is not curr_pgrp.
(enum_groups): Ditto.
(main): Fix condition when SYSTEM group gets printed.
* mkpasswd.c (enum_users): Don't skip printing users when print_current
is set and user SID is not curr_user.
(main): Allow printing standard accounts even when print_current is set.
warnings.
* mkgroup.c: Change all global variables and most functions to static.
(enum_local_groups): Add a print_current parameter to control whether entries
for everything should be printed or just the current user.
(enum_groups): Ditto.
(main): Move call fetch_current_pgrp_sid earlier to avoid a NULL deference when
no command line arguments are specified. Accommodate argument changes to above
functions. Avoid printing SYSTEM account when print_current is specified.
Issue error when extra stuff is found on the command line.
* mkpasswd.c: Change all global variables and most functions to static.
(enum_users): Add a print_current parameter to control whether entries for
everything should be printed or just the current user.
(main): Move call fetch_current_user_sid earlier to avoid a NULL deference when
no command line arguments are specified. Accommodate argument change to above
function. Avoid printing standard accounts when print_current is specified.
Issue error when extra stuff is found on the command line.
group SID from user token.
(current_group): Move up in file. Move fetching primary group SID to
fetch_current_pgrp_sid.
(enum_local_groups): Check if current SID is the same as current user's
primary group SID.
(enum_groups): Ditto.
(main): Call fetch_current_pgrp_sid before enumerating groups. Call
current_group only if current group hasn't been enumerated already.
* mkpasswd.c (fetch_current_user_sid): New function to fetch current
user SID from user token.
(current_user): Move fetching current user SID to
fetch_current_user_sid.
(enum_users): Check if current SID is the same as current user's SID.
(main): Call fetch_current_user_sid before enumerating users. Call
current_user only if current user hasn't been enumerated already.
(longopts): Rename mount-commands option to mount-entries.
(opts): Remove removed options.
(struct opt): Move up in file to allow using it in usage.
(usage): Change text for --mount-entries option. Remove
-X option. Add valid options output.
(main): Remove handling -b option.
(convert_spaces): New static function to convert spaces to "\040"
string.
(mount_entries): Renamed from mount_commands. Rewrite to emit
/etc/fstab compatible output.
(show_cygdrive_info): Print "nouser" rather than "system".
* umount.cc (longopts): Remove remove-all-mounts,
remove-cygdrive-prefix, remove-system-mounts, system and user options.
(opts): Remove A, c, s, S, u options.
(usage): Remove text for all removed options.
(main): Remove handling for all removed options.
(remove_all_mounts): Remove.
(remove_all_system_mounts): Remove.
(remove_cygdrive_prefix): Remove.
* utils.sgml: Fix mount and umount documentation. Move description
of (cyg,not)exec options to mount table section.
* bloda.cc: Use statically linked functions throughout.
* cygpath.cc: Drop 9x considerations.
* mkgroup.c: Revamp. Redefine -l and -d options to take optional
machine and domain parameters. Redefine -c to work always, using
token information. Add -L, -D, -C to create unique groupnames in
domain\group syntax. Add -S option to define domain\group separator
char. Ignore -u and -s options.
* mkpasswd.c: Revamp. Redefine -l and -d options to take optional
machine and domain parameters. Redefine -c to work always, using
token information. Add -L, -D, -C to create unique usernames in
domain\user syntax. Add -S option to define domain\user separator
char. Ignore -g and -s options. Prefer to take homedir from $HOME
over $HOMEDRIVE/$HOMEPATH.
* path.cc (oopts): Add "acl", "noacl", "posix=0" and "posix=1" options.
(getmntent): Accomodate throughout.
* ps.cc: Fix copyright dates.
* utils.sgml: Fix text for mkgroup and mkpasswd.
DsGetDcNameW. Reformat. Convert to use WCHAR for names throughout.
Use defines instead of constants throughout.
(MAX_SID_LEN): Define.
(load_netapi): Just load DsGetDcNameW pointer.
(psx_dir): Remove.
(uni2ansi): Remove.
(enum_local_users): Take server name and use in Net... call.
(DBGSID): Define datastructure.
(MAX_BUILTIN_SIDS): Define.
(builtin_sid_list): Define global sid list.
(builtin_sid_cnt): Define counter for global sid list.
(enum_local_groups): Take server name and use in Net... and Lookup...
calls. Take offset argument. Use MAX_PREFERRED_LENGTH in call to
NetLocalGroupEnum. Check for duplicate builtin groups.
(enum_users): Take server name and use in Net... call.
(usage): Change text slightly.
(print_version): Fix copyright.
(main): Call enum_local_groups for domains as well.
* mkpasswd.c: Use statically linked functions throughout, except for
DsGetDcNameW. Reformat. Convert to use WCHAR for names throughout.
Use defines instead of constants throughout.
(MAX_SID_LEN): Define.
(load_netapi): Just load DsGetDcNameW pointer.
(uni2ansi): Use wcstombs.
(current_user): Replace "unused_by_nt/2000/xp" by
just "unused".
(enum_users): Ditto.
(print_version): Fix copyright.
(print_version): Simplify printing copyright dates.
(main): Remove default_flag. Dont set flags on -s and -u options.
(mount_commands): Drop handling -s and -u options.
* path.cc: Fetch mount points from fstab files instead of from
registry. Use adapted functions copied from Cygwin DLL.
(mnt_t): Drop issys member. Define as "mnt_t" instead of "struct mnt_t"
subsequently.
(max_mount_entry): New variable.
(unconvert_slashes): Move to earlier location in file. Make inline.
(find2): Remove.
(get_cygdrive0): Remove.
(get_cygdrive): Remove.
(skip_ws): New function.
(find_ws): Ditto.
(conv_fstab_spaces): Ditto.
(read_flags): Ditto.
(from_fstab_line): Ditto.
(get_user): Ditto.
(from_fstab): Ditto.
(mnt_sort): Ditto.
(read_mounts): Drop old registry code. Fetch
"Software\Cygwin\Setup\rootdir" value from HKCU or HKLM key. Use
rootdir extracted from module path as fallback. Call from_fstab for
nouser and user mount points.
(setmntent): Check max_mount_entry to test if read_mounts must be
called.
(getmntent): Use MOUNT_SYSTEM flag instead of mnt_t's issys member.
(is_symlink): Rewrite. Just read the whole file in memory rather
than by parts. Account for an ITEMIDLIST if present, as well as
the new style of Cygwin shortcut supporting targets > MAX_PATH.
(find_app_on_path): Use SYMLINK_MAX. Resolve symlink relative
to link's location. Adjust to the fact that cygpath already
normalizes its return value.
* path.cc (rel_vconcat): Add cwd parameter, and use it instead
of calling GetCurrentDirectory() if possible. Rename throughout.
(vcygpath): Rename from cygpath and accept cwd and va_list. Pass
cwd on to rel_vconcat().
(cygpath_rel): New front end for vcygpath.
(cygpath): Ditto.
* path.h (cygpath_rel): Declare.
(SYMLINK_MAX): Define to 4095.
testsuite.exe from path-testsuite.o and testsuite.o.
* path.cc: Include testsuite.h.
(struct mnt): Change to a mnt_t typedef and don't define
mount_table when TESTSUITE is defined.
(find2): Don't include when TESTSUITE is defined to avoid warning.
(get_cygdrive0): Ditto.
(get_cygdrive): Ditto.
(read_mounts): Provide empty implementation when TESTSUITE is
defined.
(vconcat): Use the isslash macro.
(unconvert_slashes): New helper to convert to backslashses.
(rel_vconcat): Handle relative paths more gracefully.
(cygpath): Skip a leading "./" sequence. Avoid double-slashes.
Normalize final output to backslashes and remove redundant path
sequences.
* testsuite.cc: New file implementing testsuite driver.
* testsuite.h: New header implementing harness mount table and
series of tests.
first. Load kernel32.dll earlier. Make osname a buffer. Simplify
Non-NT code. Use GetProductInfo in Vista/2008 case. Clean up
non-Vista version info. Exit early if not on NT.
* bloda.cc (pNtQuerySystemInformation): Add.
(pRtlAnsiStringToUnicodeString): Add.
(get_process_list): Use function pointers for NT functions.
(dump_dodgy_apps): Skip dodgy app check on non-NT platforms.
Use GetProcAddress for NT-specific functions.
(main): Set file name buffer size to PATH_MAX. Use progname or
progname_long member of struct external_pinfo dependent of the value of
the struct's version member.
dependency-filtering $(wordlist ...) call appropriately. Link ntdll.
(bloda.o): New rule to build bloda.o
* cygcheck.cc (dump_sysinfo): Call bloda function dump_dodgy_apps().
* bloda.cc: New file implements detection of applications from the
Big List Of Dodgy Apps.
(sys_sigabbrev): New array of signal strings, patterned after linux.
(siglist): Use __signals.
* cygwin/include/cygwin/signal.h (sys_sigabbrev): Define.
* cygwin/include/cygwin/version.h: Bump API minor version to 177.
* utils/Makefile.in (kill.exe): Remove reliance on libiberty.
* utils/kill.cc (strsigno): New function patterned after libiberty but using
newly exported cygwin array.
(paths): Redefine as type pathlike.
(display_error): Declare a few different ways to allow more flexible usage
throughout.
(display_error_fmt): New function for those cases where C++ just isn't enough.
(add_path): Rewrite to allocate pathlike paths. Always tack on a trailing
slash since that's what everyone who uses it wants. NULL terminate the path
list. Register "it's a system path" field.
(init_path): Call add_path with info regarding whether path is a system path or
not.
(pathlike::check_existence): Move into pathlike class. Accept file and
extension arguments to build up path on the fly. Modify other arguments.
(find_on_path): Constify return value and appropriate arguments. Eliminate
short-circuit for fully-qualified paths. Simplify loop which iterates over
path.
(already_did): Constify argument.
(track_down): Ditto. Regularize some error messages.
(find_app_on_path): Ditto.
(cygcheck): Constify argument. Use 20th century string handling functions.
(dump_sysinfo): Remove odd inclusion of '\\bin' "Just in case". Accommodate
change of paths to pathlike.
* path.cc (isslash): Rename from SLASH_P and use throughout.
(rel_vconcat): Front-end to vconcat which prepends cwd to path before passing
along for conversion to native windows.
(cygpath): Remove "./" test. Call rel_vconcat if filename appears to be
relative.
basic flags. Only check options_from_file_flag if reading options
from command line.
(main): Check for NULL argz vector. Don't free argz vector prematurely.
Don't force flag combination in !options_from_file_flag case.
(options_from_file_flag): Move from main to global static variable.
(mode_flag): Ditto.
(do_sysfolders): Rename from dowin and accommodate throughout.
Don't exit from here.
(do_pathconv): Rename from doit and accommodate throughout.
(print_version): Change copyright.
(do_options): New function, centralizing option processing.
Rework checking options for correctness.
(action): New function, centralizing calling worker functions.
(main): Simplify. Move option processing to do_options. Move calling
worker functions to action. Rework getting arguments from files.
(get_special_folder): New function.
(get_user_folder): New function.
(dowin): Add -O and -F, better -D, -P error handling.
(main): Add -O and -F.
* utils.sgml (cygpath): Document -O and -F.
(REG_AUTO): Define.
(value_type): Replace key_type. Use REG_xxx values directly.
Accomodate change throughout.
(longopts): Add --dword, --dword-le, --none, --qword and --hex options.
(opts): Add -d, -D, -n, -Q and -x options.
(types): Array to convert REG_xxx into strings.
(hex): New variable to keep value of --hex option.
(usage): Accomodate new options. Print only the necessary by default.
Only be verbose in case of -h/--help option.
(cmd_list): Use key separator from -K option when printing.
Print value type when verbose option is given. Handle so far not
handled REG_xxx types.
(cmd_set): Avoid SEGV due to missing argument. Handle so far not
handled REG_xxx types.
(cmd_get): Handle --binary option type agnostic. Handle so far not
handled REG_xxx types.
(main): Handle new options.
(longopts): Add --wow64 option.
(opts): Add -w option.
(wow64): New variable to control usage of KEY_WOW64_64KEY access flag.
(usage): Add text for --wow64/-w option.
(print_version): Fix copyright.
(find_key): Use wow64 value in calls to RegOpenKeyEx and RegCreateKeyEx.
(cmd_add): Use wow64 value in call to RegCreateKeyEx.
(regDeleteKeyEx): New function pointer to load RegDeleteKeyEx function
dynamically.
(cmd_remove): Load and use regDeleteKeyEx when wow64 is set.
(main): Handle --wow64/-w option.
* utils.sgml: Document the new -w option.
(LINK_EXTENSION): New macro.
(check_existence): New static function.
(find_on_path): Check for symbolic links if asked.
(dll_info): New error handling.
(track_down): Only call dll_info() for executables, display
an error for symlinks, and print magic number for others.
(find_app_on_path): New static function.
(cygcheck, dump_sysinfo): Call find_app_on_path() instead of
find_on_path().
* path.cc (cmp_shortcut_header): New static function.
(get_word, get_dword): Moved from cygcheck.cc.
(EXE_MAGIC, SHORTCUT_MAGIC, SYMLINK_COOKIE, SYMLINK_MAGIC): New
macros.
(is_exe, is_symlink, readlink): New functions.
* path.h (is_exe, is_symlink, readlink): Declare.
(get_word, get_dword): Ditto.
* cygpath.cc: Include DDK headers.
(RtlAllocateUnicodeString): New static inline function.
(get_device_name): New static function to evaluate DOS path from
native NT path.
(get_device_paths): New function to do the same for path lists.
(doit): Call get_device_paths/get_device_name where appropriate.
* cygcheck.cc (pInternetCloseHandle): Define global function pointer.
(display_internet_error): Use it.
(package_grep): Attempt to load wininet.dll at runtime. Call WinInet
API through function pointers throughout.
in subsequent assignments. Recognize Longhorn/Vista and report as not
yet supported. Recognize when running under WOW64 and report native
CPU type. Slightly rearrange \n printing.
* child_info.h (CURR_CHILD_INFO_MAGIC): Reset.
(child_info::dwProcessId): Delete.
(child_info::straced): New variable.
(child_info::handle_fork): New member function.
* dcrt0.cc (in_forkee): New global variable.
(__cygwin_user_data::forkee): Mark as obsolete.
(do_global_ctors): Use in_forkee rather than user_data->forkee.
(get_cygwin_startup_info): Ditto. Deal with new straced field to allow strace
to deal with children of attached processes.
(initial_env): Accommodate changes to strace::hello.
(child_info_fork::handle_fork): Rename from plain old 'handle_fork'. Move
alloc_stack() call elsewhere.
(dll_crt0_0): Fill out more of user_data. Reference handle_fork via fork_info.
Add some debugging output.
(_dll_crt0): Don't wait for sync thread if sync_startup is invalid. Zero
sync_startup here. Call alloc_stack() here, if appropriate.
(dll_crt0_1): Use in_forkee rather than user_data->forkee.
(dll_crt0): Ditto.
* malloc_wrapper.cc (malloc_init): Ditto.
* dll_init.cc (in_forkee): Remove local static version of this variable.
(dll_list::load_after_fork): Don't set in_forkee here.
* external.cc (cygwin_internal): Use strace method rather than accessing field
directly.
* fhandler.cc (fhandler_base::read): Ditto.
* fhandler_tty.cc (fhandler_tty_common::__acquire_output_mutex): Ditto.
* fork.cc (frok::parent): Invoke strace write_childpid to communicate with
potential strace.
(child_copy): Add more detail to debugging output.
* init.cc (calibration_id): New static variable.
(prime_threads): Set sync_startup to invalid handle if we already know about
thread_func_ix. Use static calibration_id to hold calibration thread id.
* munge_threadfunc (munge_threadfunc): Don't try to debug if we don't find
threadfunc_ix.
(dll_entry): Avoid calling munge_threadfunc and _cygtls::remove on non-cygwin
threads invoked during process startup.
* pinfo.cc (set_myself): Always call strace.hello here regardless of DEBUGGING.
* sigproc.cc (child_info::child_info): Remove spurious handling of dwProcessId.
Set straced as appropriate.
* spawn.cc (spawn_guts): Rename ciresrv to ch. Invoke strace write_childpid to
communicate with potential strace.
* strace.cc: Include child_info.h.
(strace::hello): Remove inited test. Use active() method to test if strace has
been activated. Handle case where we are started before
(mypid): New function.
(strace::vsprntf): Try to deal more intelligently with case where progname may
not be filled out. Put pid in parentheses if it is a windows pid rather than a
cygwin pid. myself has been filled out.
(strace::write_childpid): New function for notifying strace about the creation
of children.
(strace::vprntf): Use strace method rather than accessing field directly.
(strace_printf): Ditto.
(strace::wm): Ditto.
* winsup.h (in_forkee): Declare.
* include/sys/strace.h (strace::write_childpid): Declare new function.
(strace::attached): Define new function.
(strace::active): Ditto.
(strace::active_val): Ditto.
(_STRACE_ON): Delete.
(_STRACE_OFF): Ditto.
(define_strace0): Use strace method rather than accessing field directly.
(strace_printf_wrap): Ditto.
(strace_printf_wrap1): Ditto.
*** cygwin utils changes:
* strace.cc (nprocesses): Make static global.
(quiet): New variable.
(strace_active): Ditto.
(add_child): Increment nprocesses here. Don't add a child if it is already
added (windows bug?). Report on child if not quiet.
(get_child): Just return NULL if child not found.
(remove_child): Report on child if not quiet.
(attach_process): Don't complain if given a windows process. Use windows pid
in error.
(handle_output_debug_string): Issue error if trying to manipulate a process
that we don't know about. Handle _STRACE_CHILD_PID - attach to reported child
when we get this.
(proc_child): Move nprocesses to file scope. Report on exceptions.
(longopts): Implement "--quiet".
(opts): Implement "-q".
(main): Manipulate quiet flag.
* utils.sgml (strace): Add words describing '-q'.
(main): Use show_usecs rather than usecs. Toggle delta if '-u' is specified.
(handle_output_debug_string): Avoid printing microsecond timestamp if
show_usecs == 0.
* utils.sgml (strace): Add words to describe '-u'.
* cygcheck.cc: Add includes.
(grep_packages): New global variable.
(display_internet_error): New function.
(safe_chars): New global variable.
(base_url): Ditto.
(package_grep): New function.
(usage): Reword --help output for clarity. Document new argument.
(longopts): Add 'package-query' option.
(opts): Add 'p' option, reorder to be consistent with 'longopts'.
(main): Accommodate new option.
* utils.sgml (cygcheck): Update --help output. Document new -p option.
* mkgroup.c (print_win_error): Create macro calling ...
(_print_win_error): ... this function created from former
print_win_error. Move up in source.
(PDOMAIN_CONTROLLER_INFOW): Define return type of DcGetDcNameW.
(dsgetdcname): New function pointer for DcGetDcNameW.
(load_netapi): Get DcGetDcNameW address.
(main): If DcGetDcNameW is available, use it.
* mkpasswd.c (PDOMAIN_CONTROLLER_INFOW): Define return type of
DcGetDcNameW.
(dsgetdcname): New function pointer for DcGetDcNameW.
(load_netapi): Get DcGetDcNameW address.
(main): If DcGetDcNameW is available, use it. Rename local variable
domain_name_specified to domain_specified as in mkgroup.c.
(print_version): Ditto.
(cmd_list): Don't depend on terminating '\0' being present on
string-values.
(cmd_get): Don't attempt to read more than present, but keep
extra space for terminating '\0'. Really output REG_BINARY.
Don't leak memory.
(cmd_set): Include trailing '\0' in string's length.
(opts): Add -d option.
(GetPW): Add server parameter which is given to Net functions.
(ChangePW): Ditto.
(PrintPW): Ditto.
(SetModals): Ditto.
(usage): Add description for -d/--logonserver option.
(main): Add option handling for -d/--logonserver. Use LOGONSERVER
environment variable content for server to contact, unless
-d/--logonserver option is given. If both is missing, use NULL.
* strace.cc (main): Recognize new option for displaying hex value of strace
type.
(handle_output_debug_string): Prepend output with hex value of strace message
if -H is specified.
* mkpasswd.c (print_win_error): Transform into macro.
(_print_win_error): Upgrade former print_win_error by
printing the line.
(current_user): Call _print_win_error.
(enum_users): Print name in case of lookup failure.
(enum_local_groups): Ditto.
* kill.cc (forcekill): Do not pass negative pids to
cygwin_internal. Check if sig == 0. Improve error messages.
(main): Make pid a long long and distinguish between pids, gpids
(i.e. negative pids) and Win9x pids.
Corinna Vinschen
Dave Korn
Christopher Faylor
Pierre Humblet
Brian Dessent
Joshua Daniel Franklin
Bas van Gompel