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

1.1       root        1: /*
                      2:  * libc/gen/getcwd.c
                      3:  */
                      4: 
                      5: #include <stddef.h>
                      6: #include <sys/types.h>
                      7: #include <string.h>
                      8: #include <errno.h>
                      9: 
                     10: extern char    *_getwd();
                     11: extern char    *malloc();
                     12: 
                     13: /*
                     14:  * Set errno and return NULL.
                     15:  */
                     16: static
                     17: char *
                     18: error(n) register int n;
                     19: {
                     20:        errno = n;
                     21:        return NULL;
                     22: }
                     23: 
                     24: /*
                     25:  * Get current working directory.
                     26:  * Cf. SVID Appendix 2.2 and Posix 5.2.2.
                     27:  * This calls the COHERENT function _getwd(),
                     28:  * which takes no args and returns a pointer
                     29:  * to a statically allocated string.
                     30:  */
                     31: char *
                     32: getcwd(buf, size) char *buf; size_t size;
                     33: {
                     34:        register char *dir;
                     35:        register size_t len;
                     36: 
                     37:        if (size == 0)
                     38:                return error(EINVAL);
                     39:        if ((dir = _getwd()) == NULL)
                     40:                return NULL;                    /* cannot find cwd */
                     41:        len = strlen(dir);
                     42:        if (size < len + 1)
                     43:                return error(ERANGE);
                     44:        /*
                     45:         * The following behavior is specified by SVID,
                     46:         * Posix says the behavior is undefined in this case.
                     47:         */
                     48:        if (buf == NULL && (buf = malloc(size)) == NULL)
                     49:                return error(ENOMEM);
                     50:        return strcpy(buf, dir);        
                     51: }
                     52: 
                     53: /* end of libc/gen/getcwd.c */

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