1 files changed, 25 insertions, 0 deletions
diff --git a/src/split_for_sort.c b/src/split_for_sort.c
index bb586cf..0dd8e32 100644
--- a/src/split_for_sort.c
+++ b/src/split_for_sort.c
@@ -13,6 +13,7 @@
 #include <string.h>
 #include <ctype.h>
 #include <errno.h>
+#include <sys/resource.h>
 #include <sys/stat.h>
 
 #include "output.h"
@@ -45,6 +46,26 @@ struct list_node *get_node(struct list_head *list, char *name);
 void destroy_list(struct list_head *list);
 void fflush_list(struct list_head *list);
 void print_list(struct list_head *list, FILE *out);
+int set_nofile_limit_to_hard();
+
+
+
+int set_nofile_limit_to_hard() {
+    struct rlimit lim;
+    if (getrlimit(RLIMIT_NOFILE , &lim) != 0) {
+        LOGERR("ERROR: Failed to get RLIMIT_NOFILE: %s (errno %d)\n",
+                strerror(errno), errno);
+        return -1;
+    }
+    lim.rlim_cur = lim.rlim_max;
+    if (setrlimit(RLIMIT_NOFILE , &lim) != 0) {
+        LOGERR("ERROR: Failed to set RLIMIT_NOFILE: %s (errno %d)\n",
+                strerror(errno), errno);
+        return -1;
+    }
+    return 0;
+}
+
 
 void destroy_list(struct list_head *list) {
     struct list_node *n = NULL, *b = NULL;
@@ -341,6 +362,10 @@ int main(int argc, char **argv) {
         return EXIT_FAILURE;
     }
 
+    /* modern Linux distributions set the soft limit to 1024 file descriptors,
+     * this may not be sufficient, therefore increase to the hard limit  */
+    set_nofile_limit_to_hard();
+
     splitlength = strtoull(argv[2], NULL, 10);
     if (splitlength == 0) {
         LOGERR("ERROR: Failed to read valid length from argument '%s' base 10 number >=1 expected\n", argv[2]);