X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=daemon%2Fheadtail.c;h=164f2b63a7747704d57be99e419b59ab9597bfcd;hp=6d248513ab9f0538a4e7c6fda96429c496acdc7f;hb=a0f85ba643990da25b6afe6a2bbd2407cf312c73;hpb=a7b73d4a1e09f12b2002083618056f0c823c1dcf

diff --git a/daemon/headtail.c b/daemon/headtail.c
index 6d24851..164f2b6 100644
--- a/daemon/headtail.c
+++ b/daemon/headtail.c
@@ -22,33 +22,30 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <fcntl.h>
 
 #include "../src/guestfs_protocol.h"
 #include "daemon.h"
 #include "actions.h"
 
 static char **
-headtail (const char *prog, const char *flag, const char *n, char *path)
+headtail (const char *prog, const char *flag, const char *n, const char *path)
 {
-  char *buf;
   char *out, *err;
-  int r, len;
+  int fd, flags, r;
   char **lines;
 
-  NEED_ROOT (NULL);
-  ABS_PATH (path, NULL);
+  CHROOT_IN;
+  fd = open (path, O_RDONLY);
+  CHROOT_OUT;
 
-  /* Make the path relative to /sysroot. */
-  len = strlen (path) + 9;
-  buf = malloc (len);
-  if (!buf) {
-    reply_with_perror ("malloc");
+  if (fd == -1) {
+    reply_with_perror ("%s", path);
     return NULL;
   }
-  snprintf (buf, len, "/sysroot%s", path);
 
-  r = command (&out, &err, prog, flag, n, buf, NULL);
-  free (buf);
+  flags = COMMAND_FLAG_CHROOT_COPY_FILE_TO_STDIN | fd;
+  r = commandf (&out, &err, flags, prog, flag, n, NULL);
   if (r == -1) {
     reply_with_error ("%s %s %s: %s", prog, flag, n, err);
     free (out);
@@ -72,19 +69,19 @@ headtail (const char *prog, const char *flag, const char *n, char *path)
 }
 
 char **
-do_head (char *path)
+do_head (const char *path)
 {
   return headtail ("head", "-n", "10", path);
 }
 
 char **
-do_tail (char *path)
+do_tail (const char *path)
 {
   return headtail ("tail", "-n", "10", path);
 }
 
 char **
-do_head_n (int n, char *path)
+do_head_n (int n, const char *path)
 {
   char nbuf[16];
 
@@ -94,7 +91,7 @@ do_head_n (int n, char *path)
 }
 
 char **
-do_tail_n (int n, char *path)
+do_tail_n (int n, const char *path)
 {
   char nbuf[16];