generator.ml: use new "Pathname" designation

Nearly every file-related function in daemons/*.c is affected:
Remove this pair of statements from each affected do_* function:
-  NEED_ROOT (return -1);
-  ABS_PATH (dir, return -1);
and change the type of the corresponding parameter to "const char *".
* src/generator.ml: Emit NEED_ROOT just once, even when there are two or
more Pathname args.

1 files changed, 5 insertions, 8 deletions

diff --git a/daemon/headtail.c b/daemon/headtail.c
index 79dcfbb4..9175cf05 100644
--- a/daemon/headtail.c
+++ b/daemon/headtail.c
@@ -28,16 +28,13 @@
 #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;
   char **lines;
 
-  NEED_ROOT (return NULL);
-  ABS_PATH (path, return NULL);
-
   /* Make the path relative to /sysroot. */
   buf = sysroot_path (path);
   if (!buf) {
@@ -70,19 +67,19 @@ 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];
 
@@ -92,7 +89,7 @@ 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];