Chuck wrote:
Is there a unix style "at" command for cygwin? I've searched the libs but
found nothing.
I did an initial port of the linux "at" some time back (I believe I used
the Redhat 3.1.8-31 rpm). The build script I used is attached. There is
some weirdness in unpacking the rpm file, since there was no rpm2cpio
at the time.
Note that this could be made a little better in that I think some system
calls are now in Cygwin that were not at the time I did this.
--
Joe Buehler
#!/bin/bash
VERSION=3.1.8-31
patch1()
{
patch -p0 -N <<\EOF
--- parsetime.y 2002-11-19 12:07:36.000000000 -0500
+++ parsetime.y 2002-11-19 12:17:07.000000000 -0500
@@ -3,6 +3,7 @@
#include <stdlib.h>
#include <string.h>
#include "parsetime.h"
+#include <tzfile.h>
#define YYDEBUG 1
@@ -215,8 +216,8 @@
mnum == 12) && dnum > 31)
|| ((mnum == 4 || mnum == 6 || mnum == 9 ||
mnum == 11) && dnum > 30)
- || (mnum == 2 && dnum > 29 && __isleap(ynum+1900))
- || (mnum == 2 && dnum > 28 && !__isleap(ynum+1900))
+ || (mnum == 2 && dnum > 29 && isleap(ynum+1900))
+ || (mnum == 2 && dnum > 28 && !isleap(ynum+1900))
)
{
yyerror("Error in day of month");
@@ -257,8 +258,8 @@
mnum == 12) && dnum > 31)
|| ((mnum == 4 || mnum == 6 || mnum == 9 ||
mnum == 11) && dnum > 30)
- || (mnum == 2 && dnum > 29 && __isleap(ynum+1900))
- || (mnum == 2 && dnum > 28 && !__isleap(ynum+1900))
+ || (mnum == 2 && dnum > 29 && isleap(ynum+1900))
+ || (mnum == 2 && dnum > 28 && !isleap(ynum+1900))
)
{
yyerror("Error in day of month");
@@ -474,7 +475,7 @@
if (yyparse() == 0) {
exectime = mktime(&exectm);
if (isgmt) {
- exectime -= timezone;
+ exectime -= _timezone;
}
if (time_only && (currtime > exectime)) {
exectime += 24*3600;
--- privs.h 1997-05-06 04:28:18.000000000 -0400
+++ privs.h 2002-11-19 14:27:01.000000000 -0500
@@ -140,6 +140,42 @@
setresgid(effective_gid, real_gid, -1); \
setresuid(effective_uid, real_uid, -1); \
}
+#elif __CYGWIN__
+#define RELINQUISH_PRIVS { \
+ real_uid = getuid(); \
+ effective_uid = geteuid(); \
+ real_gid = getgid(); \
+ effective_gid = getegid(); \
+ setuid(effective_uid); seteuid(real_uid); \
+ setgid(effective_gid); setegid(real_gid); \
+ }
+
+#define RELINQUISH_PRIVS_ROOT(a,b) { \
+ real_uid = (a); \
+ effective_uid = geteuid(); \
+ real_gid = (b); \
+ effective_gid = getegid(); \
+ setgid(effective_gid); setegid(real_gid); \
+ setuid(effective_uid); seteuid(real_uid); \
+ }
+
+#define PRIV_START {\
+ setuid(real_uid); seteuid(effective_uid); \
+ setgid(real_gid); setegid(effective_gid);
+
+#define PRIV_END \
+ setgid(effective_gid); setegid(real_gid); \
+ setuid(effective_uid); seteuid(real_uid); \
+ }
+
+#define REDUCE_PRIV(a,b) {\
+ setuid(real_uid); seteuid(effective_uid); \
+ setgid(real_gid); setegid(effective_gid); \
+ effective_uid = (a); \
+ effective_gid = (b); \
+ setgid(effective_gid); setegid(real_gid); \
+ setuid(effective_uid); seteuid(real_uid); \
+ }
#else
#error "Cannot implement user ID swapping without setreuid or setresuid"
#endif
--- at.c 2002-11-19 14:28:10.000000000 -0500
+++ at.c 2002-11-19 14:55:17.000000000 -0500
@@ -188,25 +188,27 @@
}
static long
-nextjob()
+nextjob(int fd)
{
long jobno;
- FILE *fid;
+ int ret;
+ char buf[32];
- jobno = 0;
- fid = fopen(LFILE, "r+");
- if (fid != NULL) {
- fscanf(fid, "%5lx", &jobno);
- rewind(fid);
- } else {
- fid = fopen(LFILE, "w");
- if (fid == NULL)
- return EOF;
- }
+ ret = read(fd, buf, sizeof(buf)-1);
+ if (ret < 0) {
+ buf[0] = 0;
+ } else {
+ buf[ret] = 0;
+ }
+
+ jobno = strtol(buf, 0, 16);
jobno = (1 + jobno) % 0xfffff; /* 2^20 jobs enough? */
- fprintf(fid, "%05lx\n", jobno);
+ ret = sprintf(buf, "%05lx\n", jobno);
+
+ lseek(fd, 0, SEEK_SET);
+
+ write(fd, buf, ret);
- fclose(fid);
return jobno;
}
@@ -252,7 +254,7 @@
PRIV_START
- if ((lockdes = open(LFILE, O_WRONLY)) < 0)
+ if ((lockdes = open(LFILE, O_RDWR)) < 0)
perr("Cannot open lockfile " LFILE);
lock.l_type = F_WRLCK;
@@ -272,7 +274,7 @@
fcntl(lockdes, F_SETLKW, &lock);
alarm(0);
- if ((jobno = nextjob()) == EOF)
+ if ((jobno = nextjob(lockdes)) == EOF)
perr("Cannot generate job number");
(void)snprintf(ppos, sizeof(atfile) - (ppos - atfile),
@@ -460,7 +460,7 @@
/* Set the x bit so that we're ready to start executing
*/
- if (fchmod(fd2, S_IRUSR | S_IWUSR | S_IXUSR) < 0)
+ if (fchmod(fd2, 0777) < 0)
perr("Cannot give away file");
close(fd2);
--- atd.c 2002-11-19 14:55:51.000000000 -0500
+++ atd.c 2002-11-19 15:35:46.000000000 -0500
@@ -486,7 +486,9 @@
chdir ("/");
-#if defined(SENDMAIL)
+#if defined(__CYGWIN__)
+ execl("/usr/sbin/ssmtp", "ssmtp", mailname, (char *) NULL);
+#elif defined(SENDMAIL)
execl(SENDMAIL, "sendmail", mailname, (char *) NULL);
#elif defined(MAILC)
execl(MAILC, "mail", mailname, (char *) NULL);
EOF
}
install_files()
{
# /usr/bin/install -c -m 755 -d /etc
# /usr/bin/install -c -m 755 -d /usr/bin
# /usr/bin/install -c -m 755 -d /usr/sbin
# /usr/bin/install -c -m 755 -d /usr/doc
/usr/bin/install -c -m 755 -d /usr/doc/at
/usr/bin/install -c -m 755 -d /var/spool/at
/usr/bin/install -c -g system -o system -m 755 -d /var/spool/at/spool
chmod 755 /var/spool/at /var/spool/at/spool
chown system:system /var/spool/at /var/spool/at/spool
touch /var/spool/at/.SEQ
chmod 666 /var/spool/at/.SEQ
chown system:system /var/spool/at/.SEQ
test -f /etc/at.allow || test -f /etc/at.deny || /usr/bin/install -c -m 644
at.deny /etc/
/usr/bin/install -c -m 4755 -s at /usr/bin
ln -s -f at /usr/bin/atq
ln -s -f at /usr/bin/atrm
/usr/bin/install -c -m 755 batch /usr/bin
/usr/bin/install -c -d -m 755 /usr/man/man1
/usr/bin/install -c -d -m 755 /usr/man/man5
/usr/bin/install -c -d -m 755 /usr/man/man8
/usr/bin/install -c -m 755 -s atd /usr/sbin
/usr/bin/install -c -m 755 atrun /usr/sbin
/usr/bin/install -c -m 644 at.1 /usr/man/man1/
( cd /usr/man/man1 && ln -s -f at.1 atq.1 && ln -s -f at.1 batch.1 && ln -s -f
at.1 atrm.1 )
/usr/bin/install -c -m 644 atd.8 /usr/man/man8/
sed "s,\${exec_prefix},/usr,g" <atrun.8>tmpman
/usr/bin/install -c -m 644 tmpman /usr/man/man8/atrun.8
rm -f tmpman
/usr/bin/install -c -m 644 at_allow.5 /usr/man/man5/
( cd /usr/man/man5 && ln -s -f at_allow.5 at_deny.5 )
/usr/bin/install -c -m 644 Problems Copyright README ChangeLog timespec
/usr/doc/at
rm -f /usr/man/cat1/at.1* /usr/man/cat1/batch.1* \
/usr/man/cat1/atq.1*
rm -f /usr/man/cat1/atd.8*
}
rm -fr at-$VERSION &&
mkdir at-$VERSION &&
(
cd at-$VERSION &&
dd skip=1 bs=8874 if=../at-$VERSION.src.rpm |
gunzip |
cpio -idmu &&
bunzip2 <at-3.1.8.tar.bz2 | cpio -idmu &&
(
cd at-3.1.8 &&
perl -n -e '
chomp;
if (/^Patch([0-9]+): (.*)/) {
$number = $1;
$file = $2;
$patchfile{$number} = $file;
}
if (/^\%patch([0-9]+)(.*)$/) {
$number = $1;
$options = " $2 ";
$options =~ s/^.*\s(-p\d*)\s.*$/$1/go;
print STDOUT "patch $options <
../$patchfile{$number}\n";
}
' ../at.spec | bash -x &&
patch1 &&
./configure --with-atspool=/var/spool/at/spool
--with-jobdir=/var/spool/at &&
rm -f lex.yy.* y.tab.* &&
make DAEMON_USERNAME=system DAEMON_GROUPNAME=system &&
install_files &&
true
)
) &&
rm -fr at-$VERSION &&
true
--
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