| ##***************************************************************************** |
| # AUTHOR: |
| # Morris Jette <jette1@llnl.gov> |
| # |
| # SYNOPSIS: |
| # X_AC_PRINTF_NULL |
| # |
| # DESCRIPTION: |
| # Test that printf("%s\n", NULL); does not result in invalid memory |
| # reference. This is a known issue in Open Solaris version 118 and |
| # some other operating systems. The potential for this problem exists |
| # in hundreds of places in the SLURM code, so the ideal place to |
| # address it is in the underlying print functions. |
| ##***************************************************************************** |
| |
| AC_DEFUN([X_AC_PRINTF_NULL], [ |
| AC_MSG_CHECKING([for support of printf("%s", NULL)]) |
| AC_RUN_IFELSE([AC_LANG_PROGRAM([ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| char *n=NULL;], |
| [[ |
| char tmp[16]; |
| char *expected = "test (null)"; |
| snprintf(tmp,sizeof(tmp),"test %s",n); |
| if (strncmp(tmp, expected, sizeof(tmp))) |
| exit(1); |
| exit(0); ]])], |
| printf_null_ok=yes, |
| printf_null_ok=no, |
| printf_null_ok=yes) |
| |
| if test "$printf_null_ok" = "no"; then |
| AC_MSG_ERROR([printf("%s", NULL) results in abort]) |
| else |
| AC_MSG_RESULT([yes]) |
| fi |
| ]) |
| |
