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/* splcmd.c
Spool a command.
Copyright (C) 1991, 1992, 1993, 1995 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
The author of the program may be contacted at ian@airs.com or
c/o Cygnus Support, 48 Grove Street, Somerville, MA 02144.
*/
#include "uucp.h"
#include "uudefs.h"
#include "uuconf.h"
#include "sysdep.h"
#include "system.h"
#include <errno.h>
#include <ctype.h>
/* Given a set of commands to execute for a remote system, create a
command file holding them. This creates a single command file
holding all the commands passed in. It returns a jobid. */
char *
zsysdep_spool_commands (qsys, bgrade, ccmds, pascmds)
const struct uuconf_system *qsys;
int bgrade;
int ccmds;
const struct scmd *pascmds;
{
char abtempfile[sizeof "TMP1234567890"];
char *ztemp;
FILE *e;
int i;
const struct scmd *q;
char *z;
char *zjobid;
#if DEBUG > 0
if (! UUCONF_GRADE_LEGAL (bgrade))
ulog (LOG_FATAL, "Bad grade %d", bgrade);
#endif
/* Write the commands into a temporary file and then rename it to
avoid a race with uucico reading the file. */
sprintf (abtempfile, "TMP%010lx", (unsigned long) getpid ());
ztemp = zsfind_file (abtempfile, qsys->uuconf_zname, bgrade);
if (ztemp == NULL)
return NULL;
e = esysdep_fopen (ztemp, FALSE, FALSE, TRUE);
if (e == NULL)
{
ubuffree (ztemp);
return NULL;
}
for (i = 0, q = pascmds; i < ccmds; i++, q++)
{
switch (q->bcmd)
{
case 'S':
fprintf (e, "S %s %s %s -%s %s 0%o %s\n", q->zfrom, q->zto,
q->zuser, q->zoptions, q->ztemp, q->imode,
q->znotify == NULL ? (const char *) "" : q->znotify);
break;
case 'R':
fprintf (e, "R %s %s %s -%s\n", q->zfrom, q->zto, q->zuser,
q->zoptions);
break;
case 'X':
fprintf (e, "X %s %s %s -%s\n", q->zfrom, q->zto, q->zuser,
q->zoptions);
break;
case 'E':
fprintf (e, "E %s %s %s -%s %s 0%o %s 0 %s\n", q->zfrom, q->zto,
q->zuser, q->zoptions, q->ztemp, q->imode,
q->znotify, q->zcmd);
break;
default:
ulog (LOG_ERROR,
"zsysdep_spool_commands: Unrecognized type %d",
q->bcmd);
(void) fclose (e);
(void) remove (ztemp);
ubuffree (ztemp);
return NULL;
}
}
if (! fstdiosync (e, ztemp))
{
(void) fclose (e);
(void) remove (ztemp);
ubuffree (ztemp);
return NULL;
}
if (fclose (e) != 0)
{
ulog (LOG_ERROR, "fclose: %s", strerror (errno));
(void) remove (ztemp);
ubuffree (ztemp);
return NULL;
}
/* The filename returned by zscmd_file is subject to some unlikely
race conditions, so keep trying the link until the destination
file does not already exist. Each call to zscmd_file should
return a file name which does not already exist, so we don't have
to do anything special before calling it again. */
while (TRUE)
{
z = zscmd_file (qsys, bgrade);
if (z == NULL)
{
(void) remove (ztemp);
ubuffree (ztemp);
return NULL;
}
if (link (ztemp, z) >= 0)
break;
if (errno != EEXIST)
{
ulog (LOG_ERROR, "link (%s, %s): %s", ztemp, z, strerror (errno));
(void) remove (ztemp);
ubuffree (ztemp);
ubuffree (z);
return NULL;
}
ubuffree (z);
}
(void) remove (ztemp);
ubuffree (ztemp);
zjobid = zsfile_to_jobid (qsys, z, bgrade);
if (zjobid == NULL)
(void) remove (z);
ubuffree (z);
return zjobid;
}
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