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Annotation of coherent/b/lib/libc/gen/mktemp.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * libc/gen/mktemp.c
                      3:  * Produce a unique filename by replacing
                      4:  * the trailing 6 X's on the user's input string
                      5:  * with process id and a unique letter.
                      6:  * (It is assumed, but not checked, that the X's are present.)
                      7:  * Revised by Michael Griffin, 7-5-84; by steve, 1/5/93.
                      8:  * Avoids unsuitable characters in generator.
                      9:  * Repeats after 26+26+10+1=63 invocations by the same process.
                     10:  */
                     11: 
                     12: char *
                     13: mktemp(template) char *template;
                     14: {
                     15:        static char generator = 'a';
                     16:        register char *p;
                     17:        register int i, pid;
                     18: 
                     19: 
                     20:        for (p = template; *p; p++)
                     21:                ;                               /* scan to end of template */
                     22:        *--p = generator;                       /* store generator */
                     23:        switch (generator)  {                   /* bump generator */
                     24:        case 'z':       generator = 'A';                break;
                     25:        case 'Z':       generator = '0';                break;
                     26:        case '9':       generator = '_';                break;
                     27:        case '_':       generator = 'a';                break;
                     28:        default:        ++generator;                    break;
                     29:        }
                     30:        pid = getpid();
                     31:        for (i = 5; i-- > 0; ) {                /* store 5-digit ASCII pid */
                     32:                *--p = pid%10 + '0';
                     33:                pid /= 10;
                     34:        }
                     35:        return template;
                     36: }
                     37: 
                     38: /* end of libc/gen/mktemp.c */

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