Move DB and cache dirs away from there dependence on ROOTDIR

This change allows us to use all autoconf specified paths, most notably
$(localstatedir). It is quite a change and touches a lot of files, as
all references to the DB and cache were done with the ROOTDIR as a prefix.

* add --lock command-line option to pacman to specify the location of the
  lockfile (this can now be specified at configure time by setting the
  $localstatedir path).
* Rip quite a few settings out of configure.ac as they are now picked by
  setting the paths during configure or make.
* Fix bug with /tmp fallback for sync downloads not working correctly
  (related to root location, now the system tmp dir is used).
* Simplified the parameters to some libalpm functions, and added get/set
  for the new lockfile option.
* Renamed several of the DEFS to names without the PM_ prefix.

Signed-off-by: Dan McGee <dan@archlinux.org>

13 files changed, 79 insertions, 53 deletions

diff --git a/lib/libalpm/Makefile.am b/lib/libalpm/Makefile.am
index 0381d9d8..285a9a83 100644
--- a/lib/libalpm/Makefile.am
+++ b/lib/libalpm/Makefile.am
@@ -2,11 +2,19 @@ AUTOMAKE_OPTIONS = gnu
 
 SUBDIRS = po
 
+# paths set at make time
+lockfile  = ${localstatedir}/run/pacman.lck
+dbpath    = ${localstatedir}/lib/pacman/
+cachedir  = ${localstatedir}/cache/pacman/pkg/
+
 lib_LTLIBRARIES = libalpm.la
 include_HEADERS = alpm_list.h alpm.h
 
-localedir = $(datadir)/locale
-DEFS = -DLOCALEDIR=\"$(localedir)\" @DEFS@
+DEFS = -DLOCALEDIR=\"@localedir@\" \
+       -DLOCKFILE=\"$(lockfile)\" \
+       -DDBPATH=\"$(dbpath)\" \
+       -DCACHEDIR=\"$(cachedir)\" \
+       @DEFS@
 
 AM_CFLAGS = -fvisibility=hidden -pedantic -D_GNU_SOURCE
 
diff --git a/lib/libalpm/alpm.c b/lib/libalpm/alpm.c
index cc7ef32d..ff180210 100644
--- a/lib/libalpm/alpm.c
+++ b/lib/libalpm/alpm.c
@@ -247,6 +247,7 @@ int SYMEXPORT alpm_db_update(int force, pmdb_t *db)
 	alpm_list_t *files = NULL;
 	char newmtime[16] = "";
 	char lastupdate[16] = "";
+	const char *dbpath;
 	int ret;
 
 	ALPM_LOG_FUNC;
@@ -275,12 +276,12 @@ int SYMEXPORT alpm_db_update(int force, pmdb_t *db)
 	}
 
 	/* build a one-element list */
-	snprintf(path, PATH_MAX, "%s" PM_EXT_DB, db->treename);
+	snprintf(path, PATH_MAX, "%s" DBEXT, db->treename);
 	files = alpm_list_add(files, strdup(path));
 
-	snprintf(path, PATH_MAX, "%s%s", handle->root, handle->dbpath);
+	dbpath = alpm_option_get_dbpath();
 
-	ret = _alpm_downloadfiles_forreal(db->servers, path, files, lastupdate, newmtime);
+	ret = _alpm_downloadfiles_forreal(db->servers, dbpath, files, lastupdate, newmtime);
 	FREELIST(files);
 	if(ret == 1) {
 		/* mtimes match, do nothing */
@@ -296,7 +297,7 @@ int SYMEXPORT alpm_db_update(int force, pmdb_t *db)
 			_alpm_log(PM_LOG_DEBUG, _("sync: new mtime for %s: %s"), db->treename, newmtime);
 			_alpm_db_setlastupdate(db, newmtime);
 		}
-		snprintf(path, PATH_MAX, "%s%s%s" PM_EXT_DB, handle->root, handle->dbpath, db->treename);
+		snprintf(path, PATH_MAX, "%s%s" DBEXT, dbpath, db->treename);
 
 		/* remove the old dir */
 		_alpm_log(PM_LOG_DEBUG, _("flushing database %s%s"), db->path);
@@ -466,8 +467,7 @@ int alpm_pkg_checksha1sum(pmpkg_t *pkg)
 	ASSERT(pkg->origin == PKG_FROM_CACHE, RET_ERR(PM_ERR_PKG_INVALID, -1));
 	ASSERT(pkg->data != handle->db_local, RET_ERR(PM_ERR_PKG_INVALID, -1));
 
-	snprintf(path, PATH_MAX, "%s%s/%s-%s" PM_EXT_PKG,
-					 handle->root, handle->cachedir,
+	snprintf(path, PATH_MAX, "%s/%s-%s" PKGEXT, handle->cachedir,
 					 alpm_pkg_get_name(pkg), alpm_pkg_get_version(pkg));
 
 	sha1sum = _alpm_SHAFile(path);
@@ -510,8 +510,7 @@ int alpm_pkg_checkmd5sum(pmpkg_t *pkg)
 	ASSERT(pkg->origin == PKG_FROM_CACHE, RET_ERR(PM_ERR_PKG_INVALID, -1));
 	ASSERT(pkg->data != handle->db_local, RET_ERR(PM_ERR_PKG_INVALID, -1));
 
-	snprintf(path, PATH_MAX, "%s%s/%s-%s" PM_EXT_PKG,
-					 handle->root, handle->cachedir,
+	snprintf(path, PATH_MAX, "%s/%s-%s" PKGEXT, handle->cachedir,
 					 alpm_pkg_get_name(pkg), alpm_pkg_get_version(pkg));
 
 	md5sum = _alpm_MDFile(path);
@@ -639,8 +638,6 @@ int SYMEXPORT alpm_trans_init(pmtranstype_t type, pmtransflag_t flags,
 															alpm_trans_cb_event event, alpm_trans_cb_conv conv,
 															alpm_trans_cb_progress progress)
 {
-	char path[PATH_MAX];
-
 	ALPM_LOG_FUNC;
 
 	/* Sanity checks */
@@ -649,8 +646,7 @@ int SYMEXPORT alpm_trans_init(pmtranstype_t type, pmtransflag_t flags,
 	ASSERT(handle->trans == NULL, RET_ERR(PM_ERR_TRANS_NOT_NULL, -1));
 
 	/* lock db */
-	snprintf(path, PATH_MAX, "%s%s", handle->root, PM_LOCK);
-	handle->lckfd = _alpm_lckmk(path);
+	handle->lckfd = _alpm_lckmk();
 	if(handle->lckfd == -1) {
 		RET_ERR(PM_ERR_HANDLE_LOCK, -1);
 	}
@@ -752,7 +748,6 @@ int SYMEXPORT alpm_trans_commit(alpm_list_t **data)
 int SYMEXPORT alpm_trans_release()
 {
 	pmtrans_t *trans;
-	char path[PATH_MAX];
 
 	ALPM_LOG_FUNC;
 
@@ -780,10 +775,11 @@ int SYMEXPORT alpm_trans_release()
 		close(handle->lckfd);
 		handle->lckfd = -1;
 	}
-	snprintf(path, PATH_MAX, "%s%s", handle->root, PM_LOCK);
-	if(_alpm_lckrm(path)) {
-		_alpm_log(PM_LOG_WARNING, _("could not remove lock file %s"), path);
-		alpm_logaction(_("warning: could not remove lock file %s"), path);
+	if(_alpm_lckrm()) {
+		_alpm_log(PM_LOG_WARNING, _("could not remove lock file %s"),
+				alpm_option_get_lockfile());
+		alpm_logaction(_("warning: could not remove lock file %s"),
+				alpm_option_get_lockfile());
 	}
 
 	return(0);
diff --git a/lib/libalpm/alpm.h b/lib/libalpm/alpm.h
index e2d2b0e1..4d551c8f 100644
--- a/lib/libalpm/alpm.h
+++ b/lib/libalpm/alpm.h
@@ -106,6 +106,9 @@ void alpm_option_set_cachedir(const char *cachedir);
 const char *alpm_option_get_logfile();
 void alpm_option_set_logfile(const char *logfile);
 
+const char *alpm_option_get_lockfile();
+void alpm_option_set_lockfile(const char *lockfile);
+
 unsigned short alpm_option_get_usesyslog();
 void alpm_option_set_usesyslog(unsigned short usesyslog);
 
diff --git a/lib/libalpm/db.c b/lib/libalpm/db.c
index a1c1121d..0aa8de18 100644
--- a/lib/libalpm/db.c
+++ b/lib/libalpm/db.c
@@ -52,9 +52,10 @@
 #include "cache.h"
 #include "alpm.h"
 
-pmdb_t *_alpm_db_new(const char *root, const char *dbpath, const char *treename)
+pmdb_t *_alpm_db_new(const char *dbpath, const char *treename)
 {
 	pmdb_t *db;
+	const size_t pathsize = strlen(dbpath) + strlen(treename) + 2;
 
 	ALPM_LOG_FUNC;
 
@@ -65,14 +66,14 @@ pmdb_t *_alpm_db_new(const char *root, const char *dbpath, const char *treename)
 		RET_ERR(PM_ERR_MEMORY, NULL);
 	}
 
-	db->path = calloc(1, strlen(root)+strlen(dbpath)+strlen(treename)+2);
+	db->path = calloc(1, pathsize);
 	if(db->path == NULL) {
 		_alpm_log(PM_LOG_ERROR, _("malloc failed: could not allocate %d bytes"),
-				  strlen(root)+strlen(dbpath)+strlen(treename)+2);
+				  pathsize);
 		FREE(db);
 		RET_ERR(PM_ERR_MEMORY, NULL);
 	}
-	sprintf(db->path, "%s%s%s/", root, dbpath, treename);
+	sprintf(db->path, "%s%s/", dbpath, treename);
 
 	strncpy(db->treename, treename, PATH_MAX);
 
@@ -160,6 +161,7 @@ pmdb_t *_alpm_db_register(const char *treename, alpm_cb_db_register callback)
 {
 	struct stat buf;
 	pmdb_t *db;
+	const char *dbpath;
 	char path[PATH_MAX];
 
 	ALPM_LOG_FUNC;
@@ -183,15 +185,17 @@ pmdb_t *_alpm_db_register(const char *treename, alpm_cb_db_register callback)
 	_alpm_log(PM_LOG_DEBUG, _("registering database '%s'"), treename);
 
 	/* make sure the database directory exists */
-	snprintf(path, PATH_MAX, "%s%s/%s", handle->root, handle->dbpath, treename);
+	dbpath = alpm_option_get_dbpath();
+	snprintf(path, PATH_MAX, "%s%s", dbpath, treename);
 	if(stat(path, &buf) != 0 || !S_ISDIR(buf.st_mode)) {
-		_alpm_log(PM_LOG_DEBUG, _("database directory '%s' does not exist, creating it"), path);
+		_alpm_log(PM_LOG_DEBUG, _("database directory '%s' does not exist, creating it"),
+				path);
 		if(_alpm_makepath(path) != 0) {
 			RET_ERR(PM_ERR_SYSTEM, NULL);
 		}
 	}
 
-	db = _alpm_db_new(handle->root, handle->dbpath, treename);
+	db = _alpm_db_new(handle->dbpath, treename);
 	if(db == NULL) {
 		RET_ERR(PM_ERR_DB_CREATE, NULL);
 	}
diff --git a/lib/libalpm/db.h b/lib/libalpm/db.h
index 26f1fdf4..1cc90309 100644
--- a/lib/libalpm/db.h
+++ b/lib/libalpm/db.h
@@ -48,7 +48,7 @@ struct __pmdb_t {
 };
 
 /* db.c, database general calls */
-pmdb_t *_alpm_db_new(const char *root, const char *dbpath, const char *treename);
+pmdb_t *_alpm_db_new(const char *dbpath, const char *treename);
 void _alpm_db_free(pmdb_t *db);
 int _alpm_db_cmp(const void *db1, const void *db2);
 alpm_list_t *_alpm_db_search(pmdb_t *db, alpm_list_t *needles);
diff --git a/lib/libalpm/handle.c b/lib/libalpm/handle.c
index 47abcb32..7eb8dc36 100644
--- a/lib/libalpm/handle.c
+++ b/lib/libalpm/handle.c
@@ -79,9 +79,10 @@ pmhandle_t *_alpm_handle_new()
 	handle->access = PM_ACCESS_RW;
 #endif
 
-	handle->root = strdup(PM_ROOT);
-	handle->dbpath = strdup(PM_DBPATH);
-	handle->cachedir = strdup(PM_CACHEDIR);
+	handle->root = strdup(ROOTDIR);
+	handle->dbpath = strdup(DBPATH);
+	handle->cachedir = strdup(CACHEDIR);
+	handle->lockfile = strdup(LOCKFILE);
 	handle->logmask = PM_LOG_ERROR | PM_LOG_WARNING;
 
 	return(handle);
@@ -111,6 +112,7 @@ void _alpm_handle_free(pmhandle_t *handle)
 	FREE(handle->dbpath);
 	FREE(handle->cachedir);
 	FREE(handle->logfile);
+	FREE(handle->lockfile);
 	FREE(handle->xfercommand);
 	FREELIST(handle->dbs_sync);
 	FREELIST(handle->noupgrade);
@@ -126,7 +128,8 @@ unsigned short SYMEXPORT alpm_option_get_logmask() { return handle->logmask; }
 const char SYMEXPORT *alpm_option_get_root() { return handle->root; }
 const char SYMEXPORT *alpm_option_get_dbpath() { return handle->dbpath; }
 const char SYMEXPORT *alpm_option_get_cachedir() { return handle->cachedir; }
-const char *alpm_option_get_logfile() { return handle->logfile; }
+const char SYMEXPORT *alpm_option_get_logfile() { return handle->logfile; }
+const char SYMEXPORT *alpm_option_get_lockfile() { return handle->lockfile; }
 unsigned short alpm_option_get_usesyslog() { return handle->usesyslog; }
 alpm_list_t *alpm_option_get_noupgrades() { return handle->noupgrade; }
 alpm_list_t *alpm_option_get_noextracts() { return handle->noextract; }
@@ -228,6 +231,14 @@ void alpm_option_set_logfile(const char *logfile)
 	}
 }
 
+void SYMEXPORT alpm_option_set_lockfile(const char *lockfile)
+{
+	if(handle->lockfile) FREE(handle->lockfile);
+	if(lockfile) {
+		handle->lockfile = strdup(lockfile);
+	}
+}
+
 void alpm_option_set_usesyslog(unsigned short usesyslog)
 {
 	handle->usesyslog = usesyslog;
diff --git a/lib/libalpm/handle.h b/lib/libalpm/handle.h
index 0790ad13..b3311db6 100644
--- a/lib/libalpm/handle.h
+++ b/lib/libalpm/handle.h
@@ -52,6 +52,7 @@ typedef struct _pmhandle_t {
 	char *dbpath;							/* Base path to pacman's DBs */
 	char *cachedir;						/* Base path to pacman's cache */
 	char *logfile;						/* Name of the file to log to */ /*TODO is this used?*/
+	char *lockfile;						/* Name of the lock file */
 	unsigned short usesyslog;	/* Use syslog instead of logfile? */
 	
 	alpm_list_t *noupgrade;			/* List of packages NOT to be upgraded */
diff --git a/lib/libalpm/md5driver.c b/lib/libalpm/md5driver.c
index 4ef3c352..80b90564 100644
--- a/lib/libalpm/md5driver.c
+++ b/lib/libalpm/md5driver.c
@@ -52,7 +52,7 @@ char* _alpm_MDFile(char *filename)
 	ALPM_LOG_FUNC;
 
 	if((file = fopen(filename, "rb")) == NULL) {
-		_alpm_log(PM_LOG_ERROR, _("%s can't be opened\n"), filename);
+		_alpm_log(PM_LOG_ERROR, _("md5: %s can't be opened\n"), filename);
 	} else {
 		char *ret;
 		int i;
diff --git a/lib/libalpm/package.c b/lib/libalpm/package.c
index d3547dfb..99ce92b8 100644
--- a/lib/libalpm/package.c
+++ b/lib/libalpm/package.c
@@ -502,7 +502,7 @@ int _alpm_pkg_splitname(const char *target, char *name, char *version, int witha
 	}
 	strncpy(tmp, t, PKG_FULLNAME_LEN+7);
 	/* trim file extension (if any) */
-	if((p = strstr(tmp, PM_EXT_PKG))) {
+	if((p = strstr(tmp, PKGEXT))) {
 		*p = '\0';
 	}
 
@@ -589,10 +589,10 @@ const char SYMEXPORT *alpm_pkg_get_filename(pmpkg_t *pkg)
 			_alpm_db_read(pkg->data, pkg, INFRQ_DESC);
 		}
 		if(pkg->arch && strlen(pkg->arch) > 0) {
-			snprintf(pkg->filename, PKG_FILENAME_LEN, "%s-%s-%s" PM_EXT_PKG,
+			snprintf(pkg->filename, PKG_FILENAME_LEN, "%s-%s-%s" PKGEXT,
 			         pkg->name, pkg->version, pkg->arch);
 		} else {
-			snprintf(pkg->filename, PKG_FILENAME_LEN, "%s-%s" PM_EXT_PKG,
+			snprintf(pkg->filename, PKG_FILENAME_LEN, "%s-%s" PKGEXT,
 			         pkg->name, pkg->version);
 		}
 	}
diff --git a/lib/libalpm/server.c b/lib/libalpm/server.c
index 650c594a..af8f5fd7 100644
--- a/lib/libalpm/server.c
+++ b/lib/libalpm/server.c
@@ -196,7 +196,7 @@ int _alpm_downloadfiles_forreal(alpm_list_t *servers, const char *localpath,
 
 			/* Try to get JUST the name of the package from the filename */
 			memset(pkgname, 0, PKG_NAME_LEN);
-			if((p = strstr(fn, PM_EXT_PKG))) {
+			if((p = strstr(fn, PKGEXT))) {
 				_alpm_pkg_splitname(fn, pkgname, NULL, 1);
 			}
 			if(!strlen(pkgname)) {
diff --git a/lib/libalpm/sync.c b/lib/libalpm/sync.c
index 87f8c720..5b573b72 100644
--- a/lib/libalpm/sync.c
+++ b/lib/libalpm/sync.c
@@ -777,7 +777,7 @@ int _alpm_sync_commit(pmtrans_t *trans, pmdb_t *db_local, alpm_list_t **data)
 	alpm_list_t *i, *j, *files = NULL;
 	pmtrans_t *tr = NULL;
 	int replaces = 0, retval = 0;
-	char ldir[PATH_MAX];
+	const char *cachedir;
 	int varcache = 1;
 
 	ALPM_LOG_FUNC;
@@ -787,7 +787,7 @@ int _alpm_sync_commit(pmtrans_t *trans, pmdb_t *db_local, alpm_list_t **data)
 
 	trans->state = STATE_DOWNLOADING;
 	/* group sync records by repository and download */
-	snprintf(ldir, PATH_MAX, "%s%s", handle->root, handle->cachedir);
+	cachedir = alpm_option_get_cachedir();
 
 	for(i = handle->dbs_sync; i; i = i->next) {
 		pmdb_t *current = i->data;
@@ -806,7 +806,7 @@ int _alpm_sync_commit(pmtrans_t *trans, pmdb_t *db_local, alpm_list_t **data)
 					EVENT(trans, PM_TRANS_EVT_PRINTURI, (char *)alpm_db_get_url(current), (char *)fname);
 				} else {
 					struct stat buf;
-					snprintf(path, PATH_MAX, "%s/%s", ldir, fname);
+					snprintf(path, PATH_MAX, "%s/%s", cachedir, fname);
 					if(stat(path, &buf)) {
 						/* file is not in the cache dir, so add it to the list */
 						files = alpm_list_add(files, strdup(fname));
@@ -820,22 +820,23 @@ int _alpm_sync_commit(pmtrans_t *trans, pmdb_t *db_local, alpm_list_t **data)
 		if(files) {
 			struct stat buf;
 			EVENT(trans, PM_TRANS_EVT_RETRIEVE_START, current->treename, NULL);
-			if(stat(ldir, &buf)) {
+			if(stat(cachedir, &buf)) {
 				/* no cache directory.... try creating it */
-				_alpm_log(PM_LOG_WARNING, _("no %s cache exists, creating...\n"), ldir);
-				alpm_logaction(_("warning: no %s cache exists, creating..."), ldir);
-				if(_alpm_makepath(ldir)) {
+				_alpm_log(PM_LOG_WARNING, _("no %s cache exists, creating...\n"), cachedir);
+				alpm_logaction(_("warning: no %s cache exists, creating..."), cachedir);
+				if(_alpm_makepath(cachedir)) {
 					/* couldn't mkdir the cache directory, so fall back to /tmp and unlink
 					 * the package afterwards.
 					 */
 					_alpm_log(PM_LOG_WARNING, _("couldn't create package cache, using /tmp instead\n"));
 					alpm_logaction(_("warning: couldn't create package cache, using /tmp instead"));
-					snprintf(ldir, PATH_MAX, "%stmp", alpm_option_get_root());
-					alpm_option_set_cachedir(ldir);
+					alpm_option_set_cachedir("/tmp");
+					cachedir = alpm_option_get_cachedir();
 					varcache = 0;
 				}
 			}
-			if(_alpm_downloadfiles(current->servers, ldir, files)) {
+			if(_alpm_downloadfiles(current->servers, alpm_option_get_cachedir(),
+						files)) {
 				_alpm_log(PM_LOG_WARNING, _("failed to retrieve some files from %s\n"), current->treename);
 				RET_ERR(PM_ERR_RETRIEVE, -1);
 			}
@@ -871,7 +872,7 @@ int _alpm_sync_commit(pmtrans_t *trans, pmdb_t *db_local, alpm_list_t **data)
 			retval = 1;
 			continue;
 		}
-		snprintf(str, PATH_MAX, "%s%s%s", handle->root, handle->cachedir, pkgname);
+		snprintf(str, PATH_MAX, "%s%s", alpm_option_get_cachedir(), pkgname);
 		md5sum2 = _alpm_MDFile(str);
 		sha1sum2 = _alpm_SHAFile(str);
 		if(md5sum2 == NULL && sha1sum2 == NULL) {
@@ -895,7 +896,7 @@ int _alpm_sync_commit(pmtrans_t *trans, pmdb_t *db_local, alpm_list_t **data)
 			}
 			if(doremove) {
 				char str[PATH_MAX];
-				snprintf(str, PATH_MAX, "%s%s%s", handle->root, handle->cachedir, pkgname);
+				snprintf(str, PATH_MAX, "%s%s", alpm_option_get_cachedir(), pkgname);
 				unlink(str);
 				snprintf(ptr, 512, _("archive %s was corrupted (bad MD5 or SHA1 checksum)\n"), pkgname);
 			} else {
@@ -981,7 +982,7 @@ int _alpm_sync_commit(pmtrans_t *trans, pmdb_t *db_local, alpm_list_t **data)
 		char str[PATH_MAX];
 
 		fname = alpm_pkg_get_filename(spkg);
-		snprintf(str, PATH_MAX, "%s%s%s", handle->root, handle->cachedir, fname);
+		snprintf(str, PATH_MAX, "%s%s", alpm_option_get_cachedir(), fname);
 		if(_alpm_trans_addtarget(tr, str) == -1) {
 			goto error;
 		}
diff --git a/lib/libalpm/util.c b/lib/libalpm/util.c
index daefa391..39935ab5 100644
--- a/lib/libalpm/util.c
+++ b/lib/libalpm/util.c
@@ -252,10 +252,11 @@ char *_alpm_strreplace(const char *str, const char *needle, const char *replace)
 
 /* Create a lock file
 */
-int _alpm_lckmk(const char *file)
+int _alpm_lckmk()
 {
 	int fd, count = 0;
 	char *dir, *ptr;
+	const char *file = alpm_option_get_lockfile();
 
 	/* create the dir of the lockfile first */
 	dir = strdup(file);
@@ -280,8 +281,9 @@ int _alpm_lckmk(const char *file)
 
 /* Remove a lock file
 */
-int _alpm_lckrm(const char *file)
+int _alpm_lckrm()
 {
+	const char *file = alpm_option_get_lockfile();
 	if(unlink(file) == -1 && errno != ENOENT) {
 		return(-1);
 	}
diff --git a/lib/libalpm/util.h b/lib/libalpm/util.h
index a1551273..b675da3d 100644
--- a/lib/libalpm/util.h
+++ b/lib/libalpm/util.h
@@ -49,8 +49,8 @@ int _alpm_copyfile(const char *src, const char *dest);
 char *_alpm_strtoupper(char *str);
 char *_alpm_strtrim(char *str);
 char *_alpm_strreplace(const char *str, const char *needle, const char *replace);
-int _alpm_lckmk(const char *file);
-int _alpm_lckrm(const char *file);
+int _alpm_lckmk();
+int _alpm_lckrm();
 int _alpm_unpack(const char *archive, const char *prefix, const char *fn);
 int _alpm_rmrf(const char *path);
 int _alpm_logaction(unsigned short usesyslog, FILE *f, const char *str);