Pass arg2 to file trigger scripts

Pass the number of instances of the target (i.e. triggering) package
left after the operation as the second argument ($2) to file trigger
scripts, similarly to regular triggers.

Don't pass it to the %transfiletrigger* variants, though, since we can't
easily obtain a count-corrected value when such a file trigger is fired
by a transaction element.  This is because when runFileTriggers() is
called in rpmtsRun(), no psm instance has been created yet and thus
psm->scriptArg or psm->countCorrection, set by rpmpsmNew(), isn't
readily available to us in runHandleTriggersInPkg().  While possible to
work around, having arg2 in transaction file triggers doesn't seem worth
the trouble.

Make arg2 correspond to the first matching package found, as opposed to
being an aggregate count of all the matching packages, even if the
latter would be easier as we wouldn't have to store the matched package
name in the mfi struct and just use rpmdbGetIteratorCount(mfi->pi).  The
reason for this is two-fold: it's consistent with how regular triggers
work and it allows file triggers to detect an upgrade (arg2 > 1) of a
triggering package.

Fixes: rpm-software-management#2755

docs/manual/file_triggers.md

@@ -32,7 +32,7 @@ directories, symlinks etc.
 
 The file triggers are defined in spec files of packages. E.g. file trigger executing `ldconfig` could be defined in glibc package.
 
-Similarly to regular triggers, file trigger scripts are passed the number of instances of the triggered package (as their first argument `$1`) that will remain when the file trigger has completed.  This can be useful in order to perform a certain operation when the triggered package is updated or removed.
+Similarly to regular triggers, file trigger scripts (except the `%transfiletrigger*` variants) are passed the number of instances of the triggered and triggering package (as the `$1` and `$2` arguments, respectively) that will remain when the file trigger has completed.  This can be useful in order to perform a certain operation when either of the packages is updated or removed.
 
 As was mentioned above there are more types of file triggers. We have two main types. File triggers execute once for package and file triggers executed once for whole transaction a.k.a transaction file triggers. Further file triggers are dived according to time of execution: before/after installation or erasure of a package or before/after a transaction.
 

lib/psm.c

@@ -885,7 +885,7 @@ static rpmRC rpmPackageInstall(rpmts ts, rpmpsm psm)
 	if (!(rpmtsFlags(ts) & RPMTRANS_FLAG_NOTRIGGERIN)) {
 	    /* Run upper file triggers i. e. with higher priorities */
 	    /* Run file triggers in other package(s) this package sets off. */
-	    rc = runFileTriggers(psm->ts, psm->te, RPMSENSE_TRIGGERIN,
+	    rc = runFileTriggers(psm->ts, psm->te, psm->scriptArg, RPMSENSE_TRIGGERIN,
 				RPMSCRIPT_FILETRIGGER, 1);
 	    if (rc) break;
 
@@ -911,7 +911,7 @@ static rpmRC rpmPackageInstall(rpmts ts, rpmpsm psm)
 
 	    /* Run lower file triggers i. e. with lower priorities */
 	    /* Run file triggers in other package(s) this package sets off. */
-	    rc = runFileTriggers(psm->ts, psm->te, RPMSENSE_TRIGGERIN,
+	    rc = runFileTriggers(psm->ts, psm->te, psm->scriptArg, RPMSENSE_TRIGGERIN,
 				RPMSCRIPT_FILETRIGGER, 2);
 	    if (rc) break;
 
@@ -944,7 +944,7 @@ static rpmRC rpmPackageErase(rpmts ts, rpmpsm psm)
 	    if (rc) break;
 
 	    /* Run file triggers in other package(s) this package sets off. */
-	    rc = runFileTriggers(psm->ts, psm->te, RPMSENSE_TRIGGERUN,
+	    rc = runFileTriggers(psm->ts, psm->te, psm->scriptArg, RPMSENSE_TRIGGERUN,
 				RPMSCRIPT_FILETRIGGER, 1);
 	    if (rc) break;
 
@@ -969,7 +969,7 @@ static rpmRC rpmPackageErase(rpmts ts, rpmpsm psm)
 	    if (rc) break;
 
 	    /* Run file triggers in other package(s) this package sets off. */
-	    rc = runFileTriggers(psm->ts, psm->te, RPMSENSE_TRIGGERUN,
+	    rc = runFileTriggers(psm->ts, psm->te, psm->scriptArg, RPMSENSE_TRIGGERUN,
 				RPMSCRIPT_FILETRIGGER, 2);
 	    if (rc) break;
 	}
@@ -982,7 +982,7 @@ static rpmRC rpmPackageErase(rpmts ts, rpmpsm psm)
 
 	/* Run file triggers in other package(s) this package sets off. */
 	if (!(rpmtsFlags(ts) & RPMTRANS_FLAG_NOTRIGGERPOSTUN)) {
-	    rc = runFileTriggers(psm->ts, psm->te, RPMSENSE_TRIGGERPOSTUN,
+	    rc = runFileTriggers(psm->ts, psm->te, psm->scriptArg, RPMSENSE_TRIGGERPOSTUN,
 				RPMSCRIPT_FILETRIGGER, 1);
 	}
 
@@ -997,7 +997,7 @@ static rpmRC rpmPackageErase(rpmts ts, rpmpsm psm)
 	    if (rc) break;
 
 	    /* Run file triggers in other package(s) this package sets off. */
-	    rc = runFileTriggers(psm->ts, psm->te, RPMSENSE_TRIGGERPOSTUN,
+	    rc = runFileTriggers(psm->ts, psm->te, psm->scriptArg, RPMSENSE_TRIGGERPOSTUN,
 				RPMSCRIPT_FILETRIGGER, 2);
 	}
 	if (rc) break;

lib/rpmtriggers.c

@@ -208,6 +208,7 @@ typedef struct matchFilesIter_s {
     rpmfi fi;
     rpmfs fs;
     const char *pfx;
+    const char *pkgname;
     rpmdbMatchIterator pi;
     packageHash tranPkgs;
 } *matchFilesIter;
@@ -243,12 +244,14 @@ static rpmfiles rpmtsNextFiles(matchFilesIter mfi)
 
     if (files) {
 	rpmdbSetIteratorIndex(mfi->pi, ix + 1);
+	mfi->pkgname = rpmteN(te[0]);
     } else {
 	/* Files are not available in memory. Read them from rpmdb */
 	h = rpmdbNextIterator(mfi->pi);
 	if (h) {
 	    files = rpmfilesNew(pool, h, RPMTAG_BASENAMES,
 				RPMFI_FLAGS_FILETRIGGER);
+	    mfi->pkgname = headerGetString(h, RPMTAG_NAME);
 	}
     }
 
@@ -384,7 +387,7 @@ static matchFilesIter matchFilesIteratorFree(matchFilesIter mfi)
  */
 static int runHandleTriggersInPkg(rpmts ts, rpmte te, Header h,
 				rpmsenseFlags sense, rpmscriptTriggerModes tm,
-				int searchMode, int ti, int arg1)
+				int searchMode, int ti, int arg1, int arg2)
 {
     int nerrors = 0;
     rpmds rpmdsTriggers, rpmdsTrigger;
@@ -438,8 +441,12 @@ static int runHandleTriggersInPkg(rpmts ts, rpmte te, Header h,
 	    inputFunc = (nextfilefunc) matchFilesNext;
 	    rpmScriptSetNextFileFunc(script, inputFunc, mfi);
 
+	    /* Compute our own arg2 if asked */
+	    if (arg2 == -1 && mfi->pkgname)
+		arg2 = rpmdbCountPackages(rpmtsGetRdb(ts), mfi->pkgname);
+
 	    nerrors += runScript(ts, NULL, h, installPrefixes.data,
-				script, arg1, -1);
+				script, arg1, arg2);
 	    rpmtdFreeData(&installPrefixes);
 	    rpmScriptFree(script);
 	}
@@ -489,7 +496,7 @@ static int matchFilesInTran(rpmts ts, rpmte te, const char *pfx,
     return rc;
 }
 
-rpmRC runFileTriggers(rpmts ts, rpmte te, rpmsenseFlags sense,
+rpmRC runFileTriggers(rpmts ts, rpmte te, int arg2, rpmsenseFlags sense,
 			rpmscriptTriggerModes tm, int priorityClass)
 {
     int nerrors = 0, i;
@@ -577,11 +584,11 @@ rpmRC runFileTriggers(rpmts ts, rpmte te, rpmsenseFlags sense,
 	if (tm == RPMSCRIPT_FILETRIGGER)
 	    nerrors += runHandleTriggersInPkg(ts, te, trigH, sense, tm, 0,
 						triggers->triggerInfo[i].tix,
-						arg1);
+						arg1, arg2);
 	else
 	    nerrors += runHandleTriggersInPkg(ts, te, trigH, sense, tm, 1,
 						triggers->triggerInfo[i].tix,
-						arg1);
+						arg1, arg2);
 	headerFree(trigH);
     }
     rpmtriggersFree(triggers);
@@ -594,15 +601,20 @@ rpmRC runImmedFileTriggers(rpmts ts, rpmte te, int arg1, rpmsenseFlags sense,
 {
     int nerrors = 0;
     int triggersCount, i;
+    int arg2;
     Header trigH = rpmteHeader(te);
     struct rpmtd_s priorities;
     rpmTagVal priorityTag;
     rpmtriggers triggers;
 
     if (tm == RPMSCRIPT_FILETRIGGER) {
 	priorityTag = RPMTAG_FILETRIGGERPRIORITIES;
+	/* Request triggering package count */
+	arg2 = -1;
     } else {
 	priorityTag = RPMTAG_TRANSFILETRIGGERPRIORITIES;
+	/* Disable arg2 */
+	arg2 = -2;
     }
     headerGet(trigH, priorityTag, &priorities, HEADERGET_MINMEM);
 
@@ -629,7 +641,7 @@ rpmRC runImmedFileTriggers(rpmts ts, rpmte te, int arg1, rpmsenseFlags sense,
 
 	nerrors += runHandleTriggersInPkg(ts, te, trigH, sense, tm, 2,
 					    triggers->triggerInfo[i].tix,
-					    arg1);
+					    arg1, arg2);
     }
     rpmtriggersFree(triggers);
     headerFree(trigH);

lib/rpmtriggers.h

@@ -59,7 +59,7 @@ int runPostUnTransFileTrigs(rpmts ts);
  *			0 to run all triggers
  */
 RPM_GNUC_INTERNAL
-rpmRC runFileTriggers(rpmts ts, rpmte te, rpmsenseFlags sense,
+rpmRC runFileTriggers(rpmts ts, rpmte te, int arg2, rpmsenseFlags sense,
 			rpmscriptTriggerModes tm, int priorityClass);
 
 /* Run file triggers in this te other package(s) set off.

lib/transaction.c

@@ -1850,7 +1850,7 @@ int rpmtsRun(rpmts ts, rpmps okProbs, rpmprobFilterFlags ignoreSet)
     }
     /* Run %transfiletriggerun scripts unless disabled */
     if (!(rpmtsFlags(ts) & (RPMTRANS_FLAG_NOPRETRANS|RPMTRANS_FLAG_NOTRIGGERUN))) {
-	runFileTriggers(ts, NULL, RPMSENSE_TRIGGERUN,
+	runFileTriggers(ts, NULL, -2, RPMSENSE_TRIGGERUN,
 			RPMSCRIPT_TRANSFILETRIGGER, 0);
 	runTransScripts(ts, PKG_TRANSFILETRIGGERUN);
     }
@@ -1871,7 +1871,7 @@ int rpmtsRun(rpmts ts, rpmps okProbs, rpmprobFilterFlags ignoreSet)
 
     /* Run %transfiletriggerpostun scripts unless disabled */
     if (!(rpmtsFlags(ts) & (RPMTRANS_FLAG_NOPOSTTRANS|RPMTRANS_FLAG_NOTRIGGERIN))) {
-	runFileTriggers(ts, NULL, RPMSENSE_TRIGGERIN, RPMSCRIPT_TRANSFILETRIGGER, 0);
+	runFileTriggers(ts, NULL, -2, RPMSENSE_TRIGGERIN, RPMSCRIPT_TRANSFILETRIGGER, 0);
     }
     if (!(rpmtsFlags(ts) & (RPMTRANS_FLAG_NOPOSTTRANS|RPMTRANS_FLAG_NOTRIGGERPOSTUN))) {
 	runPostUnTransFileTrigs(ts);

tests/data/SPECS/filetriggers.spec

@@ -43,7 +43,7 @@ cat
 echo
 
 %filetriggerin -p <lua> -- /usr/bin
-print("filetriggerin(/usr/bin*)<lua>: "..arg[2])
+print("filetriggerin(/usr/bin*)<lua>: "..arg[2].." "..arg[3])
 a = rpm.next_file()
 while a do
     print(a)

tests/rpmscript.at

@@ -403,10 +403,10 @@ filetriggerin(/foo*)<lua>:
 /foo/hello-world
 /foo/zzzz
 
-filetriggerin(/usr/bin*): 1
+filetriggerin(/usr/bin*): 1 1
 /usr/bin/hello
 
-filetriggerin(/usr/bin*)<lua>: 1
+filetriggerin(/usr/bin*)<lua>: 1 1
 /usr/bin/hello
 
 transfiletriggerin(/usr/bin*): 1
@@ -458,10 +458,10 @@ filetriggerpostun(/foo*):
 /foo/hello-world
 /foo/zzzz
 
-filetriggerun(/usr/bin*): 1
+filetriggerun(/usr/bin*): 1 0
 /usr/bin/hello
 
-filetriggerpostun(/usr/bin*): 1
+filetriggerpostun(/usr/bin*): 1 0
 /usr/bin/hello
 
 transfiletriggerpostun(/usr/bin*): 1
@@ -488,7 +488,7 @@ RPMTEST_CHECK([
 runroot rpm -i /build/RPMS/noarch/parallel-1.0-1.noarch.rpm
 ],
 [0],
-[parallel-trigger-1.0-1 FILETRIGGERIN 1 | 12
+[parallel-trigger-1.0-1 FILETRIGGERIN 1 1 | 12
 parallel-trigger-1.0-1 TRANSFILETRIGGERIN 1 | 12
 ],
 [])
@@ -498,8 +498,8 @@ runroot rpm -U /build/RPMS/noarch/parallel-2.0-1.noarch.rpm
 ],
 [0],
 [parallel-trigger-1.0-1 TRANSFILETRIGGERUN 1 | 12
-parallel-trigger-1.0-1 FILETRIGGERIN 1 | 12
-parallel-trigger-1.0-1 FILETRIGGERPOSTUN 1 | 11
+parallel-trigger-1.0-1 FILETRIGGERIN 1 2 | 12
+parallel-trigger-1.0-1 FILETRIGGERPOSTUN 1 1 | 11
 parallel-trigger-1.0-1 TRANSFILETRIGGERIN 1 | 12
 parallel-trigger-1.0-1 TRANSFILETRIGGERPOSTUN 1 | 0
 ],
@@ -510,7 +510,7 @@ runroot rpm -U /build/RPMS/noarch/parallel-trigger-2.0-1.noarch.rpm
 ],
 [0],
 [parallel-trigger-1.0-1 TRANSFILETRIGGERUN 1 | 12
-parallel-trigger-2.0-1 FILETRIGGERIN 2 | 12
+parallel-trigger-2.0-1 FILETRIGGERIN 2 1 | 12
 parallel-trigger-2.0-1 TRANSFILETRIGGERIN 2 | 12
 ],
 [])
@@ -520,7 +520,7 @@ runroot rpm -e parallel
 ],
 [0],
 [parallel-trigger-2.0-1 TRANSFILETRIGGERUN 1 | 12
-parallel-trigger-2.0-1 FILETRIGGERPOSTUN 1 | 12
+parallel-trigger-2.0-1 FILETRIGGERPOSTUN 1 0 | 12
 parallel-trigger-2.0-1 TRANSFILETRIGGERPOSTUN 1 | 0
 ],
 [])
@@ -540,7 +540,7 @@ runroot rpm -i \
 runroot rpm -U /build/RPMS/noarch/parallel-trigger-1.0-1.noarch.rpm
 ],
 [0],
-[parallel-trigger-1.0-1 FILETRIGGERIN 1 | 36
+[parallel-trigger-1.0-1 FILETRIGGERIN 1 3 | 36
 parallel-trigger-1.0-1 TRANSFILETRIGGERIN 1 | 36
 ],
 [])
@@ -550,7 +550,7 @@ runroot rpm -U /build/RPMS/noarch/parallel-trigger-2.0-1.noarch.rpm
 ],
 [0],
 [parallel-trigger-1.0-1 TRANSFILETRIGGERUN 1 | 36
-parallel-trigger-2.0-1 FILETRIGGERIN 2 | 36
+parallel-trigger-2.0-1 FILETRIGGERIN 2 3 | 36
 parallel-trigger-2.0-1 TRANSFILETRIGGERIN 2 | 36
 ],
 [])