[previous] 0196 [next] [U] Unknown length modifier used with 's' conversion specifier, number %s.
Explicitly undefined REFERENCE - ISO:C90-7.9.6.2 Formatted input/output functions

An unknown length modifier is being used in conjunction with a '%s' conversion specifier in a scanf format string.

Length modifiers are used in conjunction with integer and floating conversion specifiers but not with '%s'.

For example: 


/*PRQA S 336,602,1302,1307,2017,3122,3132,3200,3209,3335,3408,3602,3625 ++*/

#include <stdio.h>

extern void foo(void)
{
    char buf[21];

    scanf("%s",  buf);                /*                           */

    scanf("%ls", buf);                /* Message 0196              */
    scanf("%hs", buf);                /* Message 0196              */
}

MISRA C:2012 Rules applicable to message 0196:

Rule-1.3  (Required) There shall be no occurrence of undefined or critical unspecified behaviour

QA·C Source Code Analyser 8.1
MISRA C:2012 Compliance Module 1.0
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