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-rw-r--r--usr/gen_init_cpio.c122
1 files changed, 86 insertions, 36 deletions
diff --git a/usr/gen_init_cpio.c b/usr/gen_init_cpio.c
index 83acd6cc0b3c..8365db6cfe06 100644
--- a/usr/gen_init_cpio.c
+++ b/usr/gen_init_cpio.c
@@ -14,6 +14,7 @@
* Original work by Jeff Garzik
*
* External file lists, symlink, pipe and fifo support by Thayne Harbaugh
+ * Hard link support by Luciano Rocha
*/
#define xstr(s) #s
@@ -286,16 +287,19 @@ static int cpio_mknod_line(const char *line)
return rc;
}
-/* Not marked static to keep the compiler quiet, as no one uses this yet... */
static int cpio_mkfile(const char *name, const char *location,
- unsigned int mode, uid_t uid, gid_t gid)
+ unsigned int mode, uid_t uid, gid_t gid,
+ unsigned int nlinks)
{
char s[256];
char *filebuf = NULL;
struct stat buf;
+ long size;
int file = -1;
int retval;
int rc = -1;
+ int namesize;
+ int i;
mode |= S_IFREG;
@@ -323,29 +327,41 @@ static int cpio_mkfile(const char *name, const char *location,
goto error;
}
- 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 */
- (unsigned)strlen(name) + 1,/* namesize */
- 0); /* chksum */
- push_hdr(s);
- push_string(name);
- push_pad();
+ size = 0;
+ for (i = 1; i <= nlinks; i++) {
+ /* data goes on last link */
+ if (i == nlinks) size = buf.st_size;
+
+ namesize = strlen(name) + 1;
+ sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX"
+ "%08lX%08X%08X%08X%08X%08X%08X",
+ "070701", /* magic */
+ ino, /* ino */
+ mode, /* mode */
+ (long) uid, /* uid */
+ (long) gid, /* gid */
+ nlinks, /* nlink */
+ (long) buf.st_mtime, /* mtime */
+ size, /* filesize */
+ 3, /* major */
+ 1, /* minor */
+ 0, /* rmajor */
+ 0, /* rminor */
+ namesize, /* namesize */
+ 0); /* chksum */
+ push_hdr(s);
+ push_string(name);
+ push_pad();
+
+ if (size) {
+ fwrite(filebuf, size, 1, stdout);
+ offset += size;
+ push_pad();
+ }
- fwrite(filebuf, buf.st_size, 1, stdout);
- offset += buf.st_size;
- push_pad();
+ name += namesize;
+ }
+ ino++;
rc = 0;
error:
@@ -357,18 +373,51 @@ error:
static int cpio_mkfile_line(const char *line)
{
char name[PATH_MAX + 1];
+ char *dname = NULL; /* malloc'ed buffer for hard links */
char location[PATH_MAX + 1];
unsigned int mode;
int uid;
int gid;
+ int nlinks = 1;
+ int end = 0, dname_len = 0;
int rc = -1;
- if (5 != sscanf(line, "%" str(PATH_MAX) "s %" str(PATH_MAX) "s %o %d %d", name, location, &mode, &uid, &gid)) {
+ if (5 > sscanf(line, "%" str(PATH_MAX) "s %" str(PATH_MAX)
+ "s %o %d %d %n",
+ name, location, &mode, &uid, &gid, &end)) {
fprintf(stderr, "Unrecognized file format '%s'", line);
goto fail;
}
- rc = cpio_mkfile(name, location, mode, uid, gid);
+ if (end && isgraph(line[end])) {
+ int len;
+ int nend;
+
+ dname = malloc(strlen(line));
+ if (!dname) {
+ fprintf (stderr, "out of memory (%d)\n", dname_len);
+ goto fail;
+ }
+
+ dname_len = strlen(name) + 1;
+ memcpy(dname, name, dname_len);
+
+ do {
+ nend = 0;
+ if (sscanf(line + end, "%" str(PATH_MAX) "s %n",
+ name, &nend) < 1)
+ break;
+ len = strlen(name) + 1;
+ memcpy(dname + dname_len, name, len);
+ dname_len += len;
+ nlinks++;
+ end += nend;
+ } while (isgraph(line[end]));
+ } else {
+ dname = name;
+ }
+ rc = cpio_mkfile(dname, location, mode, uid, gid, nlinks);
fail:
+ if (dname_len) free(dname);
return rc;
}
@@ -381,22 +430,23 @@ void usage(const char *prog)
"describe the files to be included in the initramfs archive:\n"
"\n"
"# a comment\n"
- "file <name> <location> <mode> <uid> <gid>\n"
+ "file <name> <location> <mode> <uid> <gid> [<hard links>]\n"
"dir <name> <mode> <uid> <gid>\n"
"nod <name> <mode> <uid> <gid> <dev_type> <maj> <min>\n"
"slink <name> <target> <mode> <uid> <gid>\n"
"pipe <name> <mode> <uid> <gid>\n"
"sock <name> <mode> <uid> <gid>\n"
"\n"
- "<name> name of the file/dir/nod/etc in the archive\n"
- "<location> location of the file in the current filesystem\n"
- "<target> link target\n"
- "<mode> mode/permissions of the file\n"
- "<uid> user id (0=root)\n"
- "<gid> group id (0=root)\n"
- "<dev_type> device type (b=block, c=character)\n"
- "<maj> major number of nod\n"
- "<min> minor number of nod\n"
+ "<name> name of the file/dir/nod/etc in the archive\n"
+ "<location> location of the file in the current filesystem\n"
+ "<target> link target\n"
+ "<mode> mode/permissions of the file\n"
+ "<uid> user id (0=root)\n"
+ "<gid> group id (0=root)\n"
+ "<dev_type> device type (b=block, c=character)\n"
+ "<maj> major number of nod\n"
+ "<min> minor number of nod\n"
+ "<hard links> space separated list of other links to file\n"
"\n"
"example:\n"
"# A simple initramfs\n"

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