[Bug libc/21243] New: support_delete_temp_file should issue warning for failed remove()

[carlos at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=21243

            Bug ID: 21243
           Summary: support_delete_temp_file should issue warning for
                    failed remove()
           Product: glibc
           Version: 2.25
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: carlos at redhat dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

In support/temp_file.c(support_delete_temp_files):

 98 support_delete_temp_files (void)
 99 {
100   while (temp_name_list != NULL)
101     {
102       remove (temp_name_list->name);
103       free (temp_name_list->name);
104 
105       struct temp_name_list *next
106         = (struct temp_name_list *) temp_name_list->q.q_forw;
107       free (temp_name_list);
108       temp_name_list = next;
109     }
110 }
111 

We don't check the results of remove() and it could have failed. We should
check the result and issue a warning or fail depending on the situation.

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