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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <err.h>
#include <xs.h>
#include <getopt.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <termios.h>
#define STRING_MAX XENSTORE_ABS_PATH_MAX+1024
static int max_width = 80;
static int desired_width = 60;
static int show_whole_path = 0;
#define TAG " = \"...\""
#define TAG_LEN strlen(TAG)
#define MIN(a, b) (((a) < (b))? (a) : (b))
void print_dir(struct xs_handle *h, char *path, int cur_depth, int show_perms)
{
static struct expanding_buffer ebuf;
char **e;
char newpath[STRING_MAX], *val;
int newpath_len;
int i;
unsigned int num, len;
e = xs_directory(h, XBT_NULL, path, &num);
if (e == NULL)
err(1, "xs_directory (%s)", path);
for (i = 0; i<num; i++) {
char buf[MAX_STRLEN(unsigned int)+1];
struct xs_permissions *perms;
unsigned int nperms;
int linewid;
/* Compose fullpath */
newpath_len = snprintf(newpath, sizeof(newpath), "%s%s%s", path,
path[strlen(path)-1] == '/' ? "" : "/",
e[i]);
/* Print indent and path basename */
linewid = 0;
if (show_whole_path) {
fputs(newpath, stdout);
} else {
for (; linewid<cur_depth; linewid++) {
putchar(' ');
}
linewid += printf("%.*s",
(int) (max_width - TAG_LEN - linewid), e[i]);
}
/* Fetch value */
if ( newpath_len < sizeof(newpath) ) {
val = xs_read(h, XBT_NULL, newpath, &len);
}
else {
/* Path was truncated and thus invalid */
val = NULL;
len = 0;
}
/* Print value */
if (val == NULL) {
printf(":\n");
}
else {
if (max_width < (linewid + len + TAG_LEN)) {
printf(" = \"%.*s\\...\"",
(int)(max_width - TAG_LEN - linewid),
sanitise_value(&ebuf, val, len));
}
else {
linewid += printf(" = \"%s\"",
sanitise_value(&ebuf, val, len));
if (show_perms) {
putchar(' ');
for (linewid++;
linewid < MIN(desired_width, max_width);
linewid++)
putchar((linewid & 1)? '.' : ' ');
}
}
}
free(val);
if (show_perms) {
perms = xs_get_permissions(h, XBT_NULL, newpath, &nperms);
if (perms == NULL) {
warn("\ncould not access permissions for %s", e[i]);
}
else {
int i;
fputs(" (", stdout);
for (i = 0; i < nperms; i++) {
if (i)
putchar(',');
xs_perm_to_string(perms+i, buf, sizeof(buf));
fputs(buf, stdout);
}
putchar(')');
}
}
putchar('\n');
print_dir(h, newpath, cur_depth+1, show_perms);
}
free(e);
}
void usage(int argc, char *argv[])
{
fprintf(stderr, "Usage: %s [-w] [-p] [-f] [-s] [path]\n", argv[0]);
}
int main(int argc, char *argv[])
{
struct winsize ws;
int ret, c, socket = 0, show_perm = 0;
struct xs_handle *xsh;
#define PAD 2
memset(&ws, 0, sizeof(ws));
ret = ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws);
if (!ret)
max_width = ws.ws_col - PAD;
while (0 < (c = getopt(argc, argv, "pswf"))) {
switch (c) {
case 'w':
max_width= STRING_MAX - PAD;
desired_width = 0;
break;
case 'p':
show_perm = 1;
break;
case 's':
socket = 1;
break;
case 'f':
max_width = INT_MAX/2;
desired_width = 0;
show_whole_path = 1;
break;
case ':':
case '?':
default:
usage(argc, argv);
return 0;
}
}
/* Adjust the width here to avoid argument order dependency */
if ( show_perm ) {
max_width -= 16;
}
xsh = socket ? xs_daemon_open() : xs_domain_open();
if (xsh == NULL)
err(1, socket ? "xs_daemon_open" : "xs_domain_open");
print_dir(xsh, (argc - optind) == 1 ? argv[optind] : "/", 0, show_perm);
return 0;
}
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