Add libzfs_error_init() function

[mirror_zfs.git] / lib / libzfs / libzfs_util.c

diff --git a/lib/libzfs/libzfs_util.c b/lib/libzfs/libzfs_util.c
index 9d68756bec29e17e5f641c9635abd28c11d50b7d..678eeadc0414d032453fbb7ff33ab03142d9c6eb 100644 (file)
--- a/lib/libzfs/libzfs_util.c
+++ b/lib/libzfs/libzfs_util.c
@@ -58,6 +58,31 @@ libzfs_errno(libzfs_handle_t *hdl)
        return (hdl->libzfs_error);
 }
 
+const char *
+libzfs_error_init(int error)
+{
+       switch (error) {
+       case ENXIO:
+               return (dgettext(TEXT_DOMAIN, "The ZFS modules are not "
+                   "loaded.\nTry running '/sbin/modprobe zfs' as root "
+                   "to load them.\n"));
+       case ENOENT:
+               return (dgettext(TEXT_DOMAIN, "The /dev/zfs device is "
+                   "missing and must be created.\nTry running 'udevadm "
+                   "trigger' as root to create it.\n"));
+       case ENOEXEC:
+               return (dgettext(TEXT_DOMAIN, "The ZFS modules cannot be "
+                   "auto-loaded.\nTry running '/sbin/modprobe zfs' as "
+                   "root to manually load them.\n"));
+       case EACCES:
+               return (dgettext(TEXT_DOMAIN, "Permission denied the "
+                   "ZFS utilities must be run as root.\n"));
+       default:
+               return (dgettext(TEXT_DOMAIN, "Failed to initialize the "
+                   "libzfs library.\n"));
+       }
+}
+
 const char *
 libzfs_error_action(libzfs_handle_t *hdl)
 {
@@ -628,7 +653,7 @@ int
 libzfs_run_process(const char *path, char *argv[], int flags)
 {
        pid_t pid;
-       int rc, devnull_fd;
+       int error, devnull_fd;
 
        pid = vfork();
        if (pid == 0) {
@@ -650,9 +675,9 @@ libzfs_run_process(const char *path, char *argv[], int flags)
        } else if (pid > 0) {
                int status;
 
-               while ((rc = waitpid(pid, &status, 0)) == -1 &&
+               while ((error = waitpid(pid, &status, 0)) == -1 &&
                        errno == EINTR);
-               if (rc < 0 || !WIFEXITED(status))
+               if (error < 0 || !WIFEXITED(status))
                        return (-1);
 
                return (WEXITSTATUS(status));
@@ -670,7 +695,7 @@ libzfs_run_process(const char *path, char *argv[], int flags)
  * - ZFS_MODULE_LOADING="YES|yes|ON|on" - Attempt to load modules.
  * - ZFS_MODULE_TIMEOUT="<seconds>"     - Seconds to wait for ZFS_DEV
  */
-int
+static int
 libzfs_load_module(const char *module)
 {
        char *argv[4] = {"/sbin/modprobe", "-q", (char *)module, (char *)0};
@@ -739,9 +764,7 @@ libzfs_init(void)
 
        error = libzfs_load_module(ZFS_DRIVER);
        if (error) {
-               (void) fprintf(stderr, gettext("Failed to load ZFS module "
-                   "stack.\nLoad the module manually by running "
-                   "'insmod <location>/zfs.ko' as root.\n"));
+               errno = error;
                return (NULL);
        }
 
@@ -750,13 +773,6 @@ libzfs_init(void)
        }
 
        if ((hdl->libzfs_fd = open(ZFS_DEV, O_RDWR)) < 0) {
-               (void) fprintf(stderr, gettext("Unable to open %s: %s.\n"),
-                   ZFS_DEV, strerror(errno));
-               if (errno == ENOENT)
-                       (void) fprintf(stderr,
-                           gettext("Verify the ZFS module stack is "
-                           "loaded by running '/sbin/modprobe zfs'.\n"));
-
                free(hdl);
                return (NULL);
        }
@@ -767,8 +783,6 @@ libzfs_init(void)
        if ((hdl->libzfs_mnttab = fopen(MNTTAB, "r")) == NULL) {
 #endif
                (void) close(hdl->libzfs_fd);
-               (void) fprintf(stderr,
-                   gettext("mtab is not present at %s.\n"), MNTTAB);
                free(hdl);
                return (NULL);
        }