/*

    File:       lsx.c

    Abstract:   Lists the extended attribute keys and values of the specified file or directory.

    Version:    1.0

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    Copyright © 2005 Apple Computer, Inc., All Rights Reserved

*/

#include <errno.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/xattr.h>

void

printEAs(char *path)

{

    ssize_t nsize, lsize;

    ssize_t asize = 0;

    char *attrnamebuf;

    char attrdatabuf[4096];

    /* get the size of our EA names and allocate some space */

    nsize = listxattr(path, NULL, 0, 0);

    if (NULL == (attrnamebuf = (char *)malloc(nsize))) {

        fprintf(stderr, "malloc() failed, path=%s nsize=%ld\n",

            path, nsize);

        return;

    }

    /* get the list of EA names */

    lsize = listxattr(path, attrnamebuf, nsize, 0);

    if (lsize >= 0) {

        char *ptr;

        int spaces;

        printf("%s:\n", path);

        /* iterate through the EAs */

        for(ptr=attrnamebuf; ptr < attrnamebuf + lsize; ) {

            spaces = 32;

            attrdatabuf[0] = '\0';

            /* get the size of the current EA */

            asize = getxattr(path, ptr, NULL, 0, 0, 0);

            if (asize < 0) {

                fprintf(stderr,

                    "getxattr returned: %ld (%s)\n",

                    asize, strerror(errno));

                break;

            }

            if (asize < sizeof(attrdatabuf)) {

                ssize_t asize2;

                asize2 = getxattr(path, ptr, attrdatabuf,

                    sizeof(attrdatabuf), 0, 0);

                if (asize2 < 0) {

                    fprintf(stderr,

                        "getxattr returned: %ld (%s)\n",

                        asize2, strerror(errno));

                } else {

                    attrdatabuf[asize2] = '\0';

                }

            }

            /* an attempt to pretty print manually */

            spaces -= strlen(ptr);

            printf("  %7d  %s", (int)asize, ptr);

            ptr += strlen(ptr) + 1;

            if (asize > 1) {

                int i;

                for (i=0; i < spaces; ++i)

                    printf(" ");

                printf(" %s\n", attrdatabuf);

            } else {

                printf("\n");

            }

            }

    } else {

        fprintf(stderr, "listxattr() returned: %ld (%s) on %s\n",

            lsize, strerror(errno), path);

    }

    free(attrnamebuf);

    return;

}

int

main(int argc, char *argv[])

{

    int i;

    if (argc < 2 ) {

        printf("usage: %s file1 [file2 ...]\n",

            argv[0]);

        exit(1);

    }

    for (i=1 ; i<argc ; i++)

        printEAs(argv[i]);

    exit(0);

}