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Annotation of researchv10no/cmd/odist/opkg/pwd.c, revision 1.1

1.1     ! root        1: /*
        !             2:  *     pwd() - return the name of the current directory.
        !             3:  *     We assume that the current directory never changes.
        !             4:  */
        !             5: 
        !             6: #include "asd.h"
        !             7: #include <libv.h>
        !             8: #include <stdio.h>
        !             9: 
        !            10: #define CHUNK 64
        !            11: 
        !            12: char *
        !            13: pwd(void)
        !            14: {
        !            15:        register FILE *f;
        !            16:        static char *r;
        !            17:        static unsigned size;
        !            18:        register int n, c;
        !            19: 
        !            20:        if (r == NULL) {
        !            21:                f = popen ("pwd", "r");
        !            22:                schk ((char *) f);
        !            23:                
        !            24:                n = 0;
        !            25:                while ((c = getc (f)) != EOF) {
        !            26:                        if (n >= size) {
        !            27:                                size += CHUNK;
        !            28:                                r = ralloc (r, size);
        !            29:                        }
        !            30:                        r[n++] = c;
        !            31:                }
        !            32: 
        !            33:                /* replace the trailing newline by a null */
        !            34:                r[n - 1] = '\0';
        !            35: 
        !            36:                pclose (f);
        !            37:        }
        !            38: 
        !            39:        return r;
        !            40: }

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