aboutsummaryrefslogtreecommitdiffstats
path: root/usr/gen_init_cpio.c
diff options
context:
space:
mode:
Diffstat (limited to 'usr/gen_init_cpio.c')
-rw-r--r--usr/gen_init_cpio.c28
1 files changed, 27 insertions, 1 deletions
diff --git a/usr/gen_init_cpio.c b/usr/gen_init_cpio.c
index 7abc07f0fcd2..f1d3fe34176a 100644
--- a/usr/gen_init_cpio.c
+++ b/usr/gen_init_cpio.c
@@ -370,6 +370,30 @@ error:
return rc;
}
+static char *cpio_replace_env(char *new_location)
+{
+ char expanded[PATH_MAX + 1];
+ char env_var[PATH_MAX + 1];
+ char *start;
+ char *end;
+
+ for (start = NULL; (start = strstr(new_location, "${")); ) {
+ end = strchr(start, '}');
+ if (start < end) {
+ *env_var = *expanded = '\0';
+ strncat(env_var, start + 2, end - start - 2);
+ strncat(expanded, new_location, start - new_location);
+ strncat(expanded, getenv(env_var), PATH_MAX);
+ strncat(expanded, end + 1, PATH_MAX);
+ strncpy(new_location, expanded, PATH_MAX);
+ } else
+ break;
+ }
+
+ return new_location;
+}
+
+
static int cpio_mkfile_line(const char *line)
{
char name[PATH_MAX + 1];
@@ -415,7 +439,8 @@ static int cpio_mkfile_line(const char *line)
} else {
dname = name;
}
- rc = cpio_mkfile(dname, location, mode, uid, gid, nlinks);
+ rc = cpio_mkfile(dname, cpio_replace_env(location),
+ mode, uid, gid, nlinks);
fail:
if (dname_len) free(dname);
return rc;
@@ -439,6 +464,7 @@ void usage(const char *prog)
"\n"
"<name> name of the file/dir/nod/etc in the archive\n"
"<location> location of the file in the current filesystem\n"
+ " expands shell variables quoted with ${}\n"
"<target> link target\n"
"<mode> mode/permissions of the file\n"
"<uid> user id (0=root)\n"

Privacy Policy