Implement H5Lexists. Add h5dsm_link_exists example. Other minor fixes

and cleanup.

1 files changed, 69 insertions, 0 deletions

diff --git a/examples/h5dsm_link_exists.c b/examples/h5dsm_link_exists.c
new file mode 100644
index 0000000..4b04acb
--- /dev/null
+++ b/examples/h5dsm_link_exists.c
@@ -0,0 +1,69 @@
+#include "h5dsm_example.h"
+
+int main(int argc, char *argv[]) {
+    uuid_t pool_uuid;
+    char *pool_grp = NULL;
+    hid_t file = -1, fapl = -1;
+    hsize_t dims[1] = {1};
+    H5VL_daosm_snap_id_t snap_id;
+    htri_t link_exists;
+
+    (void)MPI_Init(&argc, &argv);
+    (void)daos_init();
+
+    if(argc < 4 || argc > 5)
+        PRINTF_ERROR("argc must be 4 or 5\n");
+
+    /* Parse UUID */
+    if(0 != uuid_parse(argv[1], pool_uuid))
+        ERROR;
+
+    /* Set up FAPL */
+    if((fapl = H5Pcreate(H5P_FILE_ACCESS)) < 0)
+        ERROR;
+    if(H5Pset_fapl_daosm(fapl, MPI_COMM_WORLD, MPI_INFO_NULL, pool_uuid, pool_grp) < 0)
+        ERROR;
+
+    /* Open snapshot if specified */
+    if(argc == 5) {
+        snap_id = (H5VL_daosm_snap_id_t)atoi(argv[4]);
+        printf("Opening snapshot %llu\n", (long long unsigned)snap_id);
+        if(H5Pset_daosm_snap_open(fapl, snap_id) < 0)
+            ERROR;
+    } /* end if */
+
+    /* Open file */
+    if((file = H5Fopen(argv[2], H5F_ACC_RDONLY, fapl)) < 0)
+        ERROR;
+
+    printf("Checking if link exists... ");
+
+    /* Check link */
+    if((link_exists = H5Lexists(file, argv[3], H5P_DEFAULT)) < 0)
+        ERROR;
+
+    printf("%s\n", link_exists ? "TRUE" : "FALSE");
+
+    /* Close */
+    if(H5Fclose(file) < 0)
+        ERROR;
+    if(H5Pclose(fapl) < 0)
+        ERROR;
+
+    printf("Success\n");
+
+    (void)daos_fini();
+    (void)MPI_Finalize();
+    return 0;
+
+error:
+    H5E_BEGIN_TRY {
+        H5Fclose(file);
+        H5Pclose(fapl);
+    } H5E_END_TRY;
+
+    (void)daos_fini();
+    (void)MPI_Finalize();
+    return 1;
+}
+