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Annotation of researchv10no/cmd/mk/export/libc/strdup.c, revision 1.1

1.1     ! root        1: /*     @(#)strdup.c    1.2     */
        !             2: /*LINTLIBRARY*/
        !             3: /* string duplication
        !             4:    returns pointer to a new string which is the duplicate of string
        !             5:    pointed to by s1
        !             6:    NULL is returned if new string can't be created
        !             7: */
        !             8: 
        !             9: #include <string.h>
        !            10: #ifndef NULL
        !            11: #define NULL   0
        !            12: #endif
        !            13: 
        !            14: extern int strlen();
        !            15: extern char *malloc();
        !            16: 
        !            17: char *
        !            18: strdup(s1) 
        !            19: 
        !            20:    char * s1;
        !            21: 
        !            22: {  
        !            23:    char * s2;
        !            24: 
        !            25:    s2 = malloc((unsigned) strlen(s1)+1) ;
        !            26:    return(s2==NULL ? NULL : strcpy(s2,s1) );
        !            27: }

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