https://community.hpe.com/t5/operating-system-hp-ux/vsnprintf/m-p/2508970#M728518 Robert,<BR /><BR />Investigation of the libc.1 file shows that vsnprintf() is indeed in the library, even if it is not included in the correct header files. The following 3 lines at the beginning of your file should fix the problem:<BR /><BR />#include <STDIO.H><BR />#include <STDARG.H><BR />extern int vsnprintf( char *, int, const char *, va_list );<BR /><BR />I used the following piece of example code to illustrate the usage:<BR /><BR />#include <STDIO.H><BR />#include <STDARG.H><BR /><BR />extern int vsnprintf( char *s, size_t maxsize, const char *format, va_list ap );<BR /><BR />int call_it( char *s, size_t maxsize, const char *format, ... ) {<BR /> va_list ap;<BR /> int i;<BR /><BR /> va_start( ap, format );<BR /> i = vsnprintf( s, maxsize, format, ap );<BR /> va_end( ap );<BR />}<BR /><BR />int main( ) {<BR /> char buf[BUFSIZ];<BR /> <BR /> call_it( buf, BUFSIZ-1, "This is a test %d %c %s\n", 123, 'a', "test" );<BR /> puts( buf );<BR />}<BR /><BR /><BR /></STDARG.H></STDIO.H></STDARG.H></STDIO.H> Fri, 23 Mar 2001 12:34:38 GMT Kenneth Platz 2001-03-23T12:34:38Z https://community.hpe.com/t5/operating-system-hp-ux/vsnprintf/m-p/2508969#M728517 hi<BR />one of our programmers has started using vsnprintf which is available on HP-UX 11.00 We have to support products on HP-UX 10.20 as well, but the function doesn't seem to be publicly available in libc patches on 10.20.<BR />Any advice?<BR />thanks<BR />-robert- Fri, 23 Mar 2001 11:41:53 GMT https://community.hpe.com/t5/operating-system-hp-ux/vsnprintf/m-p/2508969#M728517 Robert O'Brien 2001-03-23T11:41:53Z https://community.hpe.com/t5/operating-system-hp-ux/vsnprintf/m-p/2508970#M728518 Robert,<BR /><BR />Investigation of the libc.1 file shows that vsnprintf() is indeed in the library, even if it is not included in the correct header files. The following 3 lines at the beginning of your file should fix the problem:<BR /><BR />#include <STDIO.H><BR />#include <STDARG.H><BR />extern int vsnprintf( char *, int, const char *, va_list );<BR /><BR />I used the following piece of example code to illustrate the usage:<BR /><BR />#include <STDIO.H><BR />#include <STDARG.H><BR /><BR />extern int vsnprintf( char *s, size_t maxsize, const char *format, va_list ap );<BR /><BR />int call_it( char *s, size_t maxsize, const char *format, ... ) {<BR /> va_list ap;<BR /> int i;<BR /><BR /> va_start( ap, format );<BR /> i = vsnprintf( s, maxsize, format, ap );<BR /> va_end( ap );<BR />}<BR /><BR />int main( ) {<BR /> char buf[BUFSIZ];<BR /> <BR /> call_it( buf, BUFSIZ-1, "This is a test %d %c %s\n", 123, 'a', "test" );<BR /> puts( buf );<BR />}<BR /><BR /><BR /></STDARG.H></STDIO.H></STDARG.H></STDIO.H> Fri, 23 Mar 2001 12:34:38 GMT https://community.hpe.com/t5/operating-system-hp-ux/vsnprintf/m-p/2508970#M728518 Kenneth Platz 2001-03-23T12:34:38Z