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base/SOURCES/autofs-5.1.1-make-open_look...

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autofs-5.1.1 - make open_lookup() return nss status
From: Ian Kent <raven@themaw.net>
In order to distinguish between source unavailable and map not found
when opening nsswitch sources that have non-default actions open_lookup()
needs to return distinct results for these two cases.
Signed-off-by: Ian Kent <raven@themaw.net>
---
daemon/lookup.c | 21 +++++++++++----------
daemon/module.c | 22 +++++++++++++---------
include/automount.h | 4 ++--
modules/lookup_multi.c | 20 +++++++++++++-------
modules/parse_amd.c | 6 ++++--
5 files changed, 43 insertions(+), 30 deletions(-)
diff --git a/daemon/lookup.c b/daemon/lookup.c
index 53455a1..0579f98 100644
--- a/daemon/lookup.c
+++ b/daemon/lookup.c
@@ -44,9 +44,9 @@ static int do_read_master(struct master *master, char *type, time_t age)
argv[0] = master->name;
argv[1] = NULL;
- lookup = open_lookup(type, "", NULL, argc, argv);
- if (!lookup)
- return NSS_STATUS_UNAVAIL;
+ status = open_lookup(type, "", NULL, argc, argv, &lookup);
+ if (status != NSS_STATUS_SUCCESS)
+ return status;
status = lookup->lookup_read_master(master, age, lookup->context);
@@ -300,10 +300,11 @@ static int do_read_map(struct autofs_point *ap, struct map_source *map, time_t a
struct lookup_mod *lookup;
int status;
- lookup = open_lookup(map->type, "", map->format, map->argc, map->argv);
- if (!lookup) {
+ status = open_lookup(map->type, "", map->format,
+ map->argc, map->argv, &lookup);
+ if (status != NSS_STATUS_SUCCESS) {
debug(ap->logopt, "lookup module %s failed", map->type);
- return NSS_STATUS_UNAVAIL;
+ return status;
}
master_source_writelock(ap->entry);
@@ -737,12 +738,12 @@ int do_lookup_mount(struct autofs_point *ap, struct map_source *map, const char
int status;
if (!map->lookup) {
- lookup = open_lookup(map->type, "",
- map->format, map->argc, map->argv);
- if (!lookup) {
+ status = open_lookup(map->type, "",
+ map->format, map->argc, map->argv, &lookup);
+ if (status != NSS_STATUS_SUCCESS) {
debug(ap->logopt,
"lookup module %s failed", map->type);
- return NSS_STATUS_UNAVAIL;
+ return status;
}
map->lookup = lookup;
}
diff --git a/daemon/module.c b/daemon/module.c
index 466d8d7..9028aaa 100644
--- a/daemon/module.c
+++ b/daemon/module.c
@@ -17,6 +17,7 @@
#include <string.h>
#include <stdlib.h>
#include "automount.h"
+#include "nsswitch.h"
int load_autofs4_module(void)
{
@@ -53,8 +54,8 @@ int load_autofs4_module(void)
return 1;
}
-struct lookup_mod *open_lookup(const char *name, const char *err_prefix,
- const char *mapfmt, int argc, const char *const *argv)
+int open_lookup(const char *name, const char *err_prefix, const char *mapfmt,
+ int argc, const char *const *argv, struct lookup_mod **lookup)
{
struct lookup_mod *mod;
char buf[MAX_ERR_BUF];
@@ -63,6 +64,7 @@ struct lookup_mod *open_lookup(const char *name, const char *err_prefix,
void *dh;
int *ver;
+ *lookup = NULL;
mod = malloc(sizeof(struct lookup_mod));
if (!mod) {
@@ -70,7 +72,7 @@ struct lookup_mod *open_lookup(const char *name, const char *err_prefix,
char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
logerr("%s%s", err_prefix, estr);
}
- return NULL;
+ return NSS_STATUS_UNAVAIL;
}
size = snprintf(fnbuf, sizeof(fnbuf),
@@ -81,7 +83,7 @@ struct lookup_mod *open_lookup(const char *name, const char *err_prefix,
char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
logerr("%s%s", err_prefix, estr);
}
- return NULL;
+ return NSS_STATUS_UNAVAIL;
}
if (!(dh = dlopen(fnbuf, RTLD_NOW))) {
@@ -89,7 +91,7 @@ struct lookup_mod *open_lookup(const char *name, const char *err_prefix,
logerr("%scannot open lookup module %s (%s)",
err_prefix, name, dlerror());
free(mod);
- return NULL;
+ return NSS_STATUS_UNAVAIL;
}
if (!(ver = (int *) dlsym(dh, "lookup_version"))
@@ -99,7 +101,7 @@ struct lookup_mod *open_lookup(const char *name, const char *err_prefix,
err_prefix, name);
dlclose(dh);
free(mod);
- return NULL;
+ return NSS_STATUS_UNAVAIL;
}
if (!(mod->lookup_init = (lookup_init_t) dlsym(dh, "lookup_init")) ||
@@ -111,16 +113,18 @@ struct lookup_mod *open_lookup(const char *name, const char *err_prefix,
logerr("%slookup module %s corrupt", err_prefix, name);
dlclose(dh);
free(mod);
- return NULL;
+ return NSS_STATUS_UNAVAIL;
}
if (mod->lookup_init(mapfmt, argc, argv, &mod->context)) {
dlclose(dh);
free(mod);
- return NULL;
+ return NSS_STATUS_NOTFOUND;
}
mod->dlhandle = dh;
- return mod;
+ *lookup = mod;
+
+ return NSS_STATUS_SUCCESS;
}
int close_lookup(struct lookup_mod *mod)
diff --git a/include/automount.h b/include/automount.h
index 447aba1..d614c10 100644
--- a/include/automount.h
+++ b/include/automount.h
@@ -302,8 +302,8 @@ struct lookup_mod {
void *context;
};
-struct lookup_mod *open_lookup(const char *name, const char *err_prefix,
- const char *mapfmt, int argc, const char *const *argv);
+int open_lookup(const char *name, const char *err_prefix, const char *mapfmt,
+ int argc, const char *const *argv, struct lookup_mod **lookup);
int close_lookup(struct lookup_mod *);
/* parse module */
diff --git a/modules/lookup_multi.c b/modules/lookup_multi.c
index ffb236c..55035e4 100644
--- a/modules/lookup_multi.c
+++ b/modules/lookup_multi.c
@@ -50,8 +50,10 @@ static struct lookup_mod *nss_open_lookup(const char *format, int argc, const ch
if (!argv || !argv[0])
return NULL;
- if (*argv[0] == '/')
- return open_lookup("file", MODPREFIX, format, argc, argv);
+ if (*argv[0] == '/') {
+ open_lookup("file", MODPREFIX, format, argc, argv, &mod);
+ return mod;
+ }
if (!strncmp(argv[0], "file", 4) ||
!strncmp(argv[0], "yp", 2) ||
@@ -65,7 +67,8 @@ static struct lookup_mod *nss_open_lookup(const char *format, int argc, const ch
fmt++;
else
fmt = format;
- return open_lookup(argv[0], MODPREFIX, fmt, argc -1, argv + 1);
+ open_lookup(argv[0], MODPREFIX, fmt, argc - 1, argv + 1, &mod);
+ return mod;
}
INIT_LIST_HEAD(&nsslist);
@@ -80,6 +83,7 @@ static struct lookup_mod *nss_open_lookup(const char *format, int argc, const ch
head = &nsslist;
list_for_each(p, head) {
struct nss_source *this;
+ int status;
this = list_entry(p, struct nss_source, list);
@@ -113,8 +117,9 @@ static struct lookup_mod *nss_open_lookup(const char *format, int argc, const ch
save_argv0 = (char *) argv[0];
argv[0] = path;
- mod = open_lookup(type, MODPREFIX, format, argc, argv);
- if (mod) {
+ status = open_lookup(type, MODPREFIX,
+ format, argc, argv, &mod);
+ if (status == NSS_STATUS_SUCCESS) {
free_sources(&nsslist);
free(save_argv0);
return mod;
@@ -124,8 +129,9 @@ static struct lookup_mod *nss_open_lookup(const char *format, int argc, const ch
free(path);
}
- mod = open_lookup(this->source, MODPREFIX, format, argc, argv);
- if (mod) {
+ status = open_lookup(this->source, MODPREFIX,
+ format, argc, argv, &mod);
+ if (status == NSS_STATUS_SUCCESS) {
free_sources(&nsslist);
return mod;
}
diff --git a/modules/parse_amd.c b/modules/parse_amd.c
index 899be40..2e3d21f 100644
--- a/modules/parse_amd.c
+++ b/modules/parse_amd.c
@@ -31,6 +31,7 @@
#define MODULE_PARSE
#include "automount.h"
+#include "nsswitch.h"
#define MODPREFIX "parse(amd): "
@@ -1129,6 +1130,7 @@ static int do_host_mount(struct autofs_point *ap, const char *name,
struct mapent *me;
const char *argv[2];
const char **pargv = NULL;
+ int status;
int argc = 0;
int ret = 1;
@@ -1170,8 +1172,8 @@ static int do_host_mount(struct autofs_point *ap, const char *name,
}
instance_mutex_lock();
- lookup = open_lookup("hosts", MODPREFIX, NULL, argc, pargv);
- if (!lookup) {
+ status = open_lookup("hosts", MODPREFIX, NULL, argc, pargv, &lookup);
+ if (status != NSS_STATUS_SUCCESS) {
debug(ap->logopt, "open lookup module hosts failed");
instance_mutex_unlock();
goto out;