ChangeSet 1.1124, 2003/03/07 16:39:06-08:00, greg@kroah.com
gen_init_cpio: Add the ability to add files to the cpio image.
usr/gen_init_cpio.c | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 90 insertions(+)
diff -Nru a/usr/gen_init_cpio.c b/usr/gen_init_cpio.c
--- a/usr/gen_init_cpio.c Fri Mar 7 16:48:24 2003
+++ b/usr/gen_init_cpio.c Fri Mar 7 16:48:24 2003
@@ -5,10 +5,28 @@
#include <string.h>
#include <unistd.h>
#include <time.h>
+#include <fcntl.h>
static unsigned int offset;
static unsigned int ino = 721;
+static void push_string(const char *name)
+{
+ unsigned int name_len = strlen(name) + 1;
+
+ fputs(name, stdout);
+ putchar(0);
+ offset += name_len;
+}
+
+static void push_pad (void)
+{
+ while (offset & 3) {
+ putchar(0);
+ offset++;
+ }
+}
+
static void push_rest(const char *name)
{
unsigned int name_len = strlen(name) + 1;
@@ -118,6 +136,78 @@
0); /* chksum */
push_hdr(s);
push_rest(name);
+}
+
+/* Not marked static to keep the compiler quiet, as no one uses this yet... */
+void cpio_mkfile(const char *filename, const char *location,
+ unsigned int mode, uid_t uid, gid_t gid)
+{
+ char s[256];
+ char *filebuf;
+ struct stat buf;
+ int file;
+ int retval;
+ int i;
+
+ mode |= S_IFREG;
+
+ retval = stat (filename, &buf);
+ if (retval) {
+ fprintf (stderr, "Filename %s could not be located\n", filename);
+ goto error;
+ }
+
+ file = open (filename, O_RDONLY);
+ if (file < 0) {
+ fprintf (stderr, "Filename %s could not be opened for reading\n", filename);
+ goto error;
+ }
+
+ filebuf = malloc(buf.st_size);
+ if (!filebuf) {
+ fprintf (stderr, "out of memory\n");
+ goto error_close;
+ }
+
+ retval = read (file, filebuf, buf.st_size);
+ if (retval < 0) {
+ fprintf (stderr, "Can not read %s file\n", filename);
+ goto error_free;
+ }
+
+ sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX"
+ "%08X%08X%08X%08X%08X%08X%08X",
+ "070701", /* magic */
+ ino++, /* ino */
+ mode, /* mode */
+ (long) uid, /* uid */
+ (long) gid, /* gid */
+ 1, /* nlink */
+ (long) buf.st_mtime, /* mtime */
+ (int) buf.st_size, /* filesize */
+ 3, /* major */
+ 1, /* minor */
+ 0, /* rmajor */
+ 0, /* rminor */
+ strlen(location) + 1, /* namesize */
+ 0); /* chksum */
+ push_hdr(s);
+ push_string(location);
+ push_pad();
+
+ for (i = 0; i < buf.st_size; ++i)
+ fputc(filebuf[i], stdout);
+ close(file);
+ free(filebuf);
+ push_pad();
+ return;
+
+error_free:
+ free(filebuf);
+error_close:
+ close(file);
+error:
+ exit(-1);
}
int main (int argc, char *argv[])
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Fri Mar 07 2003 - 22:00:40 EST