Return to getcwd.c CVS log

Up to [MW Coherent from dump] / coherent / b / lib / libc / gen

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

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.