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NetBSD/gnu/libexec/uucp/system.h

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initial import of 386bsd-0.1 sources
1993-03-21 12:45:37 +03:00
/* system.h
Header file for system dependent stuff in the Taylor UUCP package.
This file is not itself system dependent.
Copyright (C) 1991, 1992 Ian Lance Taylor
This file is part of the Taylor UUCP package.
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 of the
License, 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.
The author of the program may be contacted at ian@airs.com or
c/o AIRS, P.O. Box 520, Waltham, MA 02254.
$Log: system.h,v $
Revision 1.1.1.1 1993/03/21 09:45:37 cgd
initial import of 386bsd-0.1 sources
Revision 1.32 1992/03/17 03:15:40 ian
Pass command to fsysdep_execute as first element of argument array
Revision 1.31 1992/03/15 04:51:17 ian
Keep an array of signals we've received rather than a single variable
Revision 1.30 1992/03/11 22:06:37 ian
Marty Shannon: added max-uuxqts command
Revision 1.29 1992/03/11 17:04:53 ian
Jon Zeeff: retry execution later if temporary failure
Revision 1.28 1992/03/11 00:18:50 ian
Save temporary file if file send fails
Revision 1.27 1992/03/09 19:42:43 ian
Ted Lindgreen: don't send mail for nonexistent file
Revision 1.26 1992/02/29 04:07:08 ian
Added -j option to uucp and uux
Revision 1.25 1992/02/29 01:06:59 ian
Chip Salzenberg: recheck file permissions before sending
Revision 1.24 1992/02/28 05:06:15 ian
T. William Wells: fsysdep_catch must be a macro
Revision 1.23 1992/02/27 05:40:54 ian
T. William Wells: detach from controlling terminal, handle signals safely
Revision 1.22 1992/02/24 04:58:47 ian
Only permit files to be received into directories that are world-writeable
Revision 1.21 1992/02/20 04:18:59 ian
Added uustat
Revision 1.20 1992/02/19 19:36:07 ian
Rearranged time functions
Revision 1.19 1992/02/08 22:33:32 ian
Only get the current working directory if it's going to be needed
Revision 1.18 1992/02/08 03:54:18 ian
Include <string.h> only in <uucp.h>, added 1992 copyright
Revision 1.17 1992/02/02 20:34:36 ian
Niels Baggesen: must check user permissions on access to local files
Revision 1.16 1992/01/21 19:39:12 ian
Chip Salzenberg: uucp and uux start uucico for right system, not any
Revision 1.15 1992/01/04 21:43:24 ian
Chip Salzenberg: added ALLOW_FILENAME_ARGUMENTS to permit them
Revision 1.14 1992/01/04 04:12:54 ian
David J. Fiander: make sure execution arguments are not bad file names
Revision 1.13 1991/12/29 02:59:50 ian
Lele Gaifax: put full year in log file
Revision 1.12 1991/12/17 07:09:58 ian
Record statistics in fractions of a second
Revision 1.11 1991/12/14 16:09:07 ian
Added -l option to uux to link files into the spool directory
Revision 1.10 1991/12/11 03:59:19 ian
Create directories when necessary; don't just assume they exist
Revision 1.9 1991/11/14 03:40:10 ian
Try to figure out whether stdin is a TCP port
Revision 1.8 1991/11/13 23:08:40 ian
Expand remote pathnames in uucp and uux; fix up uux special cases
Revision 1.7 1991/11/11 18:55:52 ian
Get protocol parameters from port and dialer for incoming calls
Revision 1.6 1991/11/10 19:24:22 ian
Added pffile protocol entry point for file level control
Revision 1.5 1991/11/07 20:52:33 ian
Chip Salzenberg: pass command as single argument to /bin/sh
Revision 1.4 1991/09/19 03:23:34 ian
Chip Salzenberg: append to private debugging file, don't overwrite it
Revision 1.3 1991/09/19 03:06:04 ian
Chip Salzenberg: put BNU temporary files in system's directory
Revision 1.2 1991/09/11 02:33:14 ian
Added ffork argument to fsysdep_run
Revision 1.1 1991/09/10 19:47:55 ian
Initial revision
*/
#ifndef SYSTEM_H
#define SYSTEM_H
/* Any function which returns an error should also report an error
message.
Many of the function may share a common static buffer; this is
noted in the description of the function. */
/* The maximum length of a remote system name. */
extern int cSysdep_max_name_len;
/* Initialize. If something goes wrong, this routine should just
exit. The fdaemon argument is TRUE if called from uucico or uuxqt.
The fgetcwd argument is TRUE if the current working directory is
needed. This is used because on Unix it can be expensive to
determine the current working directory (some versions of getcwd
fork a process), but in most cases we don't need to know it.
However, we are going to chdir to the spool directory, so we have
to get the cwd now if we are ever going to get it. Both uucp and
uux use the function fsysdep_needs_cwd to determine whether they
will need the current working directory, and pass the argument to
usysdep_initialize appropriately. There's probably a cleaner way
to handle this, but this will suffice for now. */
extern void usysdep_initialize P((boolean fdaemon, boolean fgetcwd));
/* Exit the program. The fsuccess argument indicates whether to
return an indication of success or failure to the outer
environment. This routine should not return. */
extern void usysdep_exit P((boolean fsuccess));
/* Called when a non-standard configuration file is being used, to
avoid handing out privileged access. If it returns FALSE, the
default configuration file will be used. This is called before
the usysdep_initialize function is called. */
extern boolean fsysdep_other_config P((const char *));
/* Detach from the controlling terminal. This probably only makes
sense on Unix. It is called by uucico to try to get the modem port
as a controlling terminal. It is also called by uucico before it
starts up uuxqt, so that uuxqt will be a complete daemon. */
extern void usysdep_detach P((void));
/* Get the local node name if it is not specified in the configuration
file. This is called before the usysdep_initialize function is
called. It should return NULL on error. The return value should
point to a static buffer. */
extern const char *zsysdep_local_name P((void));
/* Get the login name. This is used when uucico is started up with no
arguments in slave mode, which causes it to assume that somebody
has logged in. It also used by uucp and uux for recording the user
name. This may not return NULL. The return value should point to
a static buffer. */
extern const char *zsysdep_login_name P((void));
/* Set a signal handler for a signal. If the signal occurs, the
appropriate element of afSignal should be set to the signal number
(see the declaration of afSignal in uucp.h). This routine might be
able to just use signal, but 4.3 BSD requires more complex
handling. This is called before usysdep_initialize. */
extern void usysdep_signal P((int isig));
/* Catch a signal. This is actually defined as a macro in the system
dependent header file, and the prototype here just indicates how it
should be called. It is called before a routine which must exit if
a signal occurs, and is expected to set do a setjmp (which is why
it must be a macro). It is actually only called in one place in
the system independent code, before the call to read stdin in uux.
This is needed to handle 4.2 BSD restartable system calls, which
require a longjmp. On systems which don't need to do
setjmp/longjmp around system calls, this can be redefined in
<sysdep.h> to TRUE. It should return TRUE if the routine should
proceed, or FALSE if a signal occurred. After having this return
TRUE, usysdep_start_catch should be used to start catching the
signal; this basically tells the signal handler that it's OK to do
the longjmp, if fsysdep_catch did not already do so. */
extern boolean fsysdep_catch P((void));
/* Start catching a signal. This is called after fsysdep_catch to
tell the signal handler to go ahead and do the longjmp. */
extern void usysdep_start_catch P((void));
/* Stop catching a signal. This is called when it is no longer
necessary for fsysdep_catch to handle signals. */
extern void usysdep_end_catch P((void));
/* Link two files. On Unix this should attempt the link. If it
succeeds it should return TRUE with *pfworked set to TRUE. If the
link fails because it must go across a device, it should return
TRUE with *pfworked set to FALSE. If the link fails for some other
reason, it should print an error message and return FALSE. On a
system which does not support links to files, this should just
return TRUE with *pfworked set to FALSE. */
extern boolean fsysdep_link P((const char *zfrom, const char *zto,
boolean *pfworked));
/* Get the port name. This is used when uucico is started up in slave
mode to figure out which port was used to call in so that it can
determine any appropriate protocol parameters. This may return
NULL if the port cannot be determined, which will just mean that no
protocol parameters are applied. The name returned should be the
sort of name that would appear in the port file. This should set
*pftcp_port to TRUE if it can determine that the port is a TCP
connection rather than a normal serial port. */
extern const char *zsysdep_port_name P((boolean *pftcp_port));
/* Make a spool directory for a system. This will be called each time
the system might be accessed. It should return FALSE on error. */
extern boolean fsysdep_make_spool_dir P((const struct ssysteminfo *qsys));
/* Return whether a file name is in a directory, and check for read or
write access. This should check whether zfile is within zdir (or
is zdir itself). If it is not, it should return FALSE. If zfile
is in zdir, then fcheck indicates whether further checking should
be done. If fcheck is FALSE, no further checking is done.
Otherwise, if freadable is TRUE the user zuser should have search
access to all directories from zdir down to zfile and should have
read access on zfile itself (if zfile does not exist, or is not a
regular file, this function may return FALSE but does not have to).
If freadable is FALSE, the user zuser should have search access to
all directories from zdir down to zfile and should have write
access on zfile (which may be a directory, or may not actually
exist, which is acceptable). The zuser argument may be NULL, in
which case the check should be made for any user, not just zuser.
There is no way for this function to return error. The qsys
argument should be used to expand ~ into the public directory. */
extern boolean fsysdep_in_directory P((const struct ssysteminfo *qsys,
const char *zfile,
const char *zdir,
boolean fcheck,
boolean freadable,
const char *zuser));
/* Return TRUE if a file exists, FALSE otherwise. There is no way to
return error. */
extern boolean fsysdep_file_exists P((const char *zfile));
/* Exit the current program and start a new one. If the ffork
argument is TRUE, the new program should be started up and the
current program should continue (but in all current cases, it will
immediately exit anyhow); if the ffork argument is FALSE, the new
program should replace the current program. The three string
arguments may be catenated together to form the program to execute;
I did it this way to make it easy to call execl(2), and because I
never needed more than two arguments. The program will always be
"uucico" or "uuxqt". The return value will be passed directly to
usysdep_exit, and should be TRUE on success, FALSE on error. */
extern boolean fsysdep_run P((boolean ffork, const char *zprogram,
const char *zarg1, const char *zarg2));
/* Send a mail message. This function will be passed an array of
strings. All necessary newlines are already included; the strings
should simply be concatenated together to form the mail message.
It should return FALSE on error, although the return value is often
ignored. */
extern boolean fsysdep_mail P((const char *zto, const char *zsubject,
int cstrs, const char **paz));
/* Get the time in seconds since some epoch. The actual epoch is
unimportant, so long as the time values are consistent across calls
to the program, and the value is never negative. If the pimicros
argument is not NULL, it should be set to the number of
microseconds (if this is not available, *pimicros should be set to
zero). */
extern long isysdep_time P((long *pimicros));
/* Get the time in seconds and microseconds (millionths of a second)
since some epoch. The actual epoch is not important, and it may
change in between program invocations; this is provided because on
Unix the times function may be used. If microseconds can not be
determined, *pimicros can just be set to zero. */
extern long isysdep_process_time P((long *pimicros));
/* Parse the value returned by isysdep_time into a struct tm. I
assume that this structure is defined in <time.h>. This is
basically just localtime, except that the ANSI function takes a
time_t which may not be what is returned by isysdep_time. The
typedef is a hack to avoid the problem of mentioning a structure
for the first time in a prototype while remaining compatible with
standard C. The type tm_ptr is never again referred to. */
typedef struct tm *tm_ptr;
extern void usysdep_localtime P((long itime, tm_ptr q));
/* Sleep for a number of seconds. */
extern void usysdep_sleep P((int cseconds));
/* Pause for half a second. */
extern void usysdep_pause P((void));
/* Lock a remote system. This should return FALSE if the system is
already locked (no error should be reported). */
extern boolean fsysdep_lock_system P((const struct ssysteminfo *qsys));
/* Unlock a remote system. This should return FALSE on error
(although the return value is generally ignored). */
extern boolean fsysdep_unlock_system P((const struct ssysteminfo *qsys));
/* Get the conversation sequence number for a remote system, and
increment it for next time. This should return -1 on error. */
extern long isysdep_get_sequence P((const struct ssysteminfo *qsys));
/* Get the status of a remote system. This should return FALSE on
error. Otherwise it should set *qret to the status. */
extern boolean fsysdep_get_status P((const struct ssysteminfo *qsys,
struct sstatus *qret));
/* Set the status of a remote system. This should return FALSE on
error. The system will be locked before this call is made. */
extern boolean fsysdep_set_status P((const struct ssysteminfo *qsys,
const struct sstatus *qset));
/* Check whether there is work for a remote system. This should set
*pbgrade to the highest grade of work waiting to execute. It
should return TRUE if there is work, FALSE otherwise; there is no
way to indicate an error. */
extern boolean fsysdep_has_work P((const struct ssysteminfo *qsys,
char *pbgrade));
/* Initialize the work scan. This will be called before
fsysdep_get_work. The bgrade argument is the minimum grade of
execution files that should be considered (e.g. a bgrade of 'd'
will allow all grades from 'A' to 'Z' and 'a' to 'd'). It should
return FALSE on error. */
extern boolean fsysdep_get_work_init P((const struct ssysteminfo *qsys,
int bgrade));
/* Get the next command to be executed for a remote system. The
bgrade argument will be the same as for fsysdep_get_work_init;
probably only one of these functions will use it, namely the
function for which it is more convenient. This should return FALSE
on error. The structure pointed to by qcmd should be filled in.
The strings may point into a static buffer; they will be copied out
if necessary. If there is no more work, this should set qcmd->bcmd
to 'H' and return TRUE. This should set qcmd->pseq to something
which can be passed to fsysdep_did_work to remove the job from the
queue when it has been completed. */
extern boolean fsysdep_get_work P((const struct ssysteminfo *qsys,
int bgrade, struct scmd *qcmd));
/* Remove a job from the work queue. This must also remove the
temporary file used for a send command, if there is one. It should
return FALSE on error. */
extern boolean fsysdep_did_work P((pointer pseq));
/* Save the temporary file for a send command. This function should
return a string that will be put into a mail message. On success
this string should say something like ``The file has been saved as
...''. On failure it could say something like ``The file could not
be saved because ...''. If there is no temporary file, or for some
reason it's not appropriate to include a message, this function
should just return NULL. This function is used when a file send
fails for some reason, to make sure that we don't completely lost
the file. */
extern const char *zsysdep_save_temp_file P((pointer pseq));
/* Cleanup anything left over by fsysdep_get_work_init and
fsysdep_get_work. This may be called even though
fsysdep_get_work_init has not been. */
extern void usysdep_get_work_free P((const struct ssysteminfo *qsys));
/* Get the real file name for a file. The file may or may not exist
on the system. If the zname argument is not NULL, then the zfile
argument may be a directory; if it is, zname should be used for the
name of the file within the directory. The zname argument may not
be simple (it may be in the format of another OS) so care should be
taken with it. On Unix, if the zfile argument begins with ~user/
it goes in that users home directory, and if it begins with ~/
(~uucp/) it goes in the public directory (note that each system may
have its own public directory); similar conventions may be
desirable on other systems. The return value may point to a common
static buffer. This should return NULL on error. */
extern const char *zsysdep_real_file_name P((const struct ssysteminfo *,
const char *zfile,
const char *zname));
/* Get a file name from the spool directory. This should return
NULL on error. The return value may point to a common static
buffer. */
extern const char *zsysdep_spool_file_name P((const struct ssysteminfo *,
const char *zfile));
/* Make necessary directories. This should create all non-existent
directories for a file. If the fpublic argument is TRUE, anybody
should be permitted to create and remove files in the directory;
otherwise anybody can list the directory, but only the UUCP system
can create and remove files. It should return FALSE on error. */
extern boolean fsysdep_make_dirs P((const char *zfile, boolean fpublic));
/* Create a stdio file, setting appropriate protection. If the
fpublic argument is TRUE, the file is made publically accessible;
otherwise it is treated as a private data file. If the fappend
argument is TRUE, the file is opened in append mode; otherwise any
previously existing file of the same name is removed, and the file
is kept private to the UUCP system. If the fmkdirs argument is
TRUE, then any necessary directories should also be created. On a
system in which file protections are unimportant (and the necessary
directories exist), this may be implemented as
fopen (zfile, fappend ? "a" : "w");
*/
extern FILE *esysdep_fopen P((const char *zfile, boolean fpublic,
boolean fappend, boolean fmkdirs));
/* Open a file to send to another system; the qsys argument is the
system the file is being sent to. If fcheck is TRUE, it should
make sure that the file is readable by zuser (if zuser is NULL the
file must be readable by anybody). This is to eliminate a window
between fsysdep_in_directory and esysdep_open_send. The function
should set *pimode to the mode that should be sent over (this
should be a UNIX style file mode number). It should set *pcbytes
to the number of bytes contained in the file. If an error occurs,
it should return EFILECLOSED and, if pfgone is not NULL, it should
*pfgone to TRUE if the file no longer exists or FALSE if there was
some other error. */
extern openfile_t esysdep_open_send P((const struct ssysteminfo *qsys,
const char *zname,
boolean fcheck,
const char *zuser,
unsigned int *pimode,
long *pcbytes,
boolean *pfgone));
/* Open a file to receive from another system. Receiving a file is
done in two steps. First esysdep_open_receive is called. This
should open a temporary file and return the file name in *pztemp.
It may ignore qsys (the system the file is coming from) and zto
(the file to be created) although they are passed in case they are
useful. The file mode is not available at this point. The *pztemp
return value may point to a common static buffer. The amount of
free space should be returned in *pcbytes; ideally it should be the
lesser of the amount of free space on the file system of the
temporary file and the amount of free space on the file system of
the final destination. If the amount of free space is not
available, *pcbytes should be set to -1. The function should
return EFILECLOSED on error.
After the file is written, fsysdep_move_file will be called to move
the file to its final destination, and to set the correct file
mode. */
extern openfile_t esysdep_open_receive P((const struct ssysteminfo *qsys,
const char *zto,
const char **pztemp,
long *pcbytes));
/* Move a file. This is used to move a received file to its final
location. It is also used by uuxqt to move files in and out of the
execute directory. The zto argument is the file to create. The
zorig argument is the name of the file to move. The imode argument
is the Unix file mode to use for the final file; if it is zero, it
should be ignored and the file should be kept private to the UUCP
system. If fcheck is TRUE, this should make sure the directory is
writeable by the user zuser (if zuser is NULL, then it must be
writeable by any user); this is to avoid a window of vulnerability
between fsysdep_in_directory and fsysdep_move_file. This function
should return FALSE on error; the zorig file should be removed even
if an error occurs. */
extern boolean fsysdep_move_file P((const char *zorig, const char *zto,
unsigned int imode, boolean fcheck,
const char *zuser));
/* Truncate a file which we are receiving into. This may be done by
closing the original file, removing it and reopening it. This
should return FALSE on error. */
extern openfile_t esysdep_truncate P((openfile_t e, const char *zname));
/* Start expanding a wildcarded file name. This should return FALSE
on error; otherwise subsequent calls to zsysdep_wildcard should
return file names. The argument may have leading ~ characters. */
extern boolean fsysdep_wildcard_start P((const struct ssysteminfo *qsys,
const char *zfile));
/* Get the next wildcard name. This should return NULL when there are
no more names to return. The return value may point to a common
static buffer. The argument should be the same as that to
fsysdep_wildcard_start. There is no way to return error. */
extern const char *zsysdep_wildcard P((const struct ssysteminfo *qsys,
const char *zfile));
/* Finish getting wildcard names. This may be called before or after
zsysdep_wildcard has returned NULL. It should return FALSE on
error. */
extern boolean fsysdep_wildcard_end P((void));
/* Prepare to execute a bunch of file transfer requests. This should
make an entry in the spool directory so that the next time uucico
is started up it will transfer these files. The bgrade argument
specifies the grade of the commands. The commands themselves are
in the pascmds array, which has ccmds entries. The function should
return NULL on error, or the jobid on success. The jobid is a
string that may be printed or passed to fsysdep_kill_job and
related functions, but is otherwise uninterpreted. */
extern const char *zsysdep_spool_commands P((const struct ssysteminfo *qsys,
int bgrade, int ccmds,
const struct scmd *pascmds));
/* Get a file name to use for a data file to be copied to another
system. A file which will become an execute file will use a grade
of 'X' (actually this is just convention, but it affects where the
file will be placed in the spool directory on Unix). The ztname,
zdname and zxname arguments will all either be NULL or point to an
array of CFILE_NAME_LEN characters in length. The ztname array
should be set to a temporary file name that could be passed to
zsysdep_spool_file_name to retrieve the return value of this
function; this will be appropriate for the temporary name in a send
request. The zdname array should be set to a data file name that
is appropriate for the spool directory of the other system; this
will be appropriate for the name of the destination file in a send
request of a data file for an execution of some sort. The zxname
array should be set to an execute file name that is appropriate for
the other system. This should return NULL on error. The return
value may point to a common static buffer. */
#define CFILE_NAME_LEN (15)
extern const char *zsysdep_data_file_name P((const struct ssysteminfo *qsys,
int bgrade, char *ztname,
char *zdname, char *zxname));
/* Get a name for a local execute file. This is used by uux for a
local command with remote files. It should return NULL on error.
The return value may point to a common static buffer. */
extern const char *zsysdep_xqt_file_name P((void));
/* Beginning getting execute files. To get a list of execute files,
first fsysdep_get_xqt_init is called, then zsysdep_get_xqt is
called several times until it returns NULL, then finally
usysdep_get_xqt_free is called. */
extern boolean fsysdep_get_xqt_init P((void));
/* Get the next execute file. This should return NULL when finished
(with *pferr set to FALSE). On an error this should return NULL
with *pferr set to TRUE. This should set *pzsystem to the name of
the system for which the execute file was created. */
extern const char *zsysdep_get_xqt P((const char **pzsystem,
boolean *pferr));
/* Clean up after getting execute files. */
extern void usysdep_get_xqt_free P((void));
/* Get the absolute pathname of a command to execute. This is given
the legal list of commands (which may be the special case "ALL")
and the path. It must return an absolute pathname to the command.
If it gets an error it should set *pferr to TRUE and return NULL;
if the command is not found it should set *pferr to FALSE and
return NULL. Otherwise, the return value may point to a common
static buffer. */
extern const char *zsysdep_find_command P((const char *zcmd,
const char *zcmds,
const char *zpath,
boolean *pferr));
#if ! ALLOW_FILENAME_ARGUMENTS
/* Check an argument to an execution command to make sure that it
doesn't refer to a file name that may not be accessed. This should
check the argument to see if it is a filename. If it is, it should
either reject it out of hand or it should call fin_directory_list
on the file with both qsys->zremote_receive and qsys->zremote_send.
If the file is rejected, it should log an error and return FALSE.
Otherwise it should return TRUE. */
extern boolean fsysdep_xqt_check_file P((const struct ssysteminfo *qsys,
const char *zfile));
#endif /* ! ALLOW_FILENAME_ARGUMENTS */
/* Run an execute file. The arguments are:
qsys -- system for which execute file was created
zuser -- user who requested execution
pazargs -- list of arguments to command (element 0 is command)
zfullcmd -- command and arguments stuck together in one string
zinput -- file name for standard input (may be NULL)
zoutput -- file name for standard output (may be NULL)
fshell -- if TRUE, use /bin/sh to execute file
pzerror -- set to name of standard error file
pftemp -- set to TRUE if error is temporary, FALSE otherwise
If fshell is TRUE, the command should be executed with /bin/sh
(obviously, this can only really be done on Unix systems). If an
error occurs this should return FALSE and set *pftemp
appropriately. */
extern boolean fsysdep_execute P((const struct ssysteminfo *qsys,
const char *zuser,
const char **pazargs,
const char *zfullcmd,
const char *zinput,
const char *zoutput,
boolean fshell,
const char **pzerror,
boolean *pftemp));
/* Lock a particular uuxqt command (e.g. rmail). This should return
FALSE if the command is already locked. This is used to make sure
only one uuxqt process is handling a particular command. There is
no way to return error. */
/* Lock for uuxqt execution. If the global variable cMaxuuxqts is not
zero, this should make sure that no more than cMaxuuxqts uuxqt
processes are running at once. Also, only one uuxqt may execute a
particular command (specified by the -c option) at a time. If zcmd
is not NULL, it is a command that must be locked. This should
return a nonegative number which will be passed to
fsysdep_unlock_uuxqt, or -1 on error. */
extern int isysdep_lock_uuxqt P((const char *zcmd));
/* Unlock a uuxqt process. This is passed the return value of
isysdep_lock_uuxqt, as well as the zcmd argument passed to
isysdep_lock_uuxqt. It may return FALSE on error, but at present
the return value is ignored. */
extern boolean fsysdep_unlock_uuxqt P((int iseq, const char *zcmd));
/* See whether a particular uuxqt command is locked. This should
return TRUE if the command is locked (because isysdep_lock_uuxqt
was called with it as an argument), FALSE otherwise. There is no
way to return error. */
extern boolean fsysdep_uuxqt_locked P((const char *zcmd));
/* Lock an execute file in order to execute it. This should return
FALSE if the execute file is already locked. There is no way to
return error. */
extern boolean fsysdep_lock_uuxqt_file P((const char *zfile));
/* Unlock an execute file. This should return FALSE on error. */
extern boolean fsysdep_unlock_uuxqt_file P((const char *zfile));
/* Lock the execution directory. This should return FALSE if the
directory is already locked. There is no way to return error. */
extern boolean fsysdep_lock_uuxqt_dir P((void));
/* Remove all files in the execution directory, and unlock it. This
should return FALSE on error. */
extern boolean fsysdep_unlock_uuxqt_dir P((void));
/* Add the working directory to a file name. If the file already has
a directory, it should not be changed. The return value may point
to a common static buffer. If the flocal argument is TRUE, then
this is a local file (so, for example, a leading ~ should be
expanded as appropriate); otherwise the file is on a remote system.
This should return NULL on error. */
extern const char *zsysdep_add_cwd P((const char *zfile,
boolean flocal));
/* See whether a file name will need the current working directory
when zsysdep_add_cwd is called on it. This will be called before
usysdep_initialize. It should just check whether the argument is
an absolute path. See the comment above usysdep_initialize in this
file for an explanation of why things are done this way. */
extern boolean fsysdep_needs_cwd P((const char *zfile));
/* Get the base name of a file. The file will be a local file name,
and this function should return the base file name, ideally in a
form which will make sense on most systems; it will be used if the
destination of a uucp is a directory. */
extern const char *zsysdep_base_name P((const char *zfile));
/* Return a filename within a directory. The zdir argument may name a
file, in which case it should be returned. If it names a
directory, this function should get the filename from the zfile
argument and return that filename within the directory. */
extern const char *zsysdep_in_dir P((const char *zdir, const char *zfile));
/* Get the mode of a file. This should return a Unix style file mode.
It should return 0 on error. */
extern unsigned int isysdep_file_mode P((const char *zfile));
/* See whether the user has access to a file. This is called by uucp
and uux to prevent copying of a file which uucp can read but the
user cannot. If access is denied, this should log an error message
and return FALSE. */
extern boolean fsysdep_access P((const char *zfile));
/* See whether the daemon has access to a file. This is called by
uucp and uux when a file is queued up for transfer without being
copied into the spool directory. It is merely an early error
check, as the daemon would of course discover the error itself when
it tried the transfer. If access would be denied, this should log
an error message and return FALSE. */
extern boolean fsysdep_daemon_access P((const char *zfile));
/* Return the jobid of a work file, given the sequence value. On
error this should log an error and return NULL. The jobid is a
string which may be printed out and read in and passed to
fsysdep_kill_job, etc., but is not otherwise interpreted. The
return value may point to a common statis buffer. */
extern const char *zsysdep_jobid P((const struct ssysteminfo *qsys,
pointer pseq));
/* Kill a job, given the jobid. This should remove all associated
files and in general eliminate the job completely. On error it
should log an error message and return FALSE. */
extern boolean fsysdep_kill_job P((const char *zjobid));
/* Rejuvenate a job, given the jobid. If possible, this should update
the time associated with the job such that it will not be
eliminated by uuclean or similar programs that check the creation
time. This should affect the return value of isysdep_work_time.
On error it should log an error message and return FALSE. */
extern boolean fsysdep_rejuvenate_job P((const char *zjobid));
/* Get the time a job was queued, given the sequence number. There is
no way to indicate error. The return value must use the same epoch
as isysdep_time. */
extern long isysdep_work_time P((const struct ssysteminfo *qsys,
pointer pseq));
/* Get the time a file was created. This is called by uustat on
execution files. There is no way to indicate error. The return
value must use the same epoch as isysdep_time. */
extern long isysdep_file_time P((const char *zfile));
/* Get the size in bytes of a file. There is no way to indicate
error. This is only used by uustat. */
extern long csysdep_size P((const char *zfile));
/* Start getting status information for all systems with available
status information. There may be status information for unknown
systems, which is why this series of functions is used. The phold
argument is used to pass information around, to possibly avoid the
use of static variables. On error this should log an error and
return FALSE. */
extern boolean fsysdep_all_status_init P((pointer *phold));
/* Get status information for the next system. This should return the
system name and fill in the qstat argument. The phold argument
will be that set by fsysdep_all_status_init. On error this should
log an error, set *pferr to TRUE, and return NULL. */
extern const char *zsysdep_all_status P((pointer phold, boolean *pferr,
struct sstatus *qstat));
/* Free up anything allocated by fsysdep_all_status_init and
zsysdep_all_status. The phold argument is that set by
fsysdep_all_status_init. */
extern void usysdep_all_status_free P((pointer phold));
/* Display the process status of all processes holding lock files.
This is uustat -p. The return value is passed to usysdep_exit. */
extern boolean fsysdep_lock_status P((void));
#endif /* ! defined (SYSTEM_H) */