#include <unistd.h>
#include <time.h>
#include <fcntl.h>
+#include <errno.h>
+#include <ctype.h>
+#include <limits.h>
+
+/*
+ * 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
+#define str(s) xstr(s)
static unsigned int offset;
static unsigned int ino = 721;
+static time_t default_mtime;
+
+struct file_handler {
+ const char *type;
+ int (*handler)(const char *line);
+};
static void push_string(const char *name)
{
const char name[] = "TRAILER!!!";
sprintf(s, "%s%08X%08X%08lX%08lX%08X%08lX"
- "%08X%08X%08X%08X%08X%08ZX%08X",
+ "%08X%08X%08X%08X%08X%08X%08X",
"070701", /* magic */
0, /* ino */
0, /* mode */
0, /* minor */
0, /* rmajor */
0, /* rminor */
- strlen(name) + 1, /* namesize */
+ (unsigned)strlen(name)+1, /* namesize */
0); /* chksum */
push_hdr(s);
push_rest(name);
}
}
-static void cpio_mkdir(const char *name, unsigned int mode,
+static int cpio_mkslink(const char *name, const char *target,
+ unsigned int mode, uid_t uid, gid_t gid)
+{
+ char s[256];
+
+ if (name[0] == '/')
+ name++;
+ sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX"
+ "%08X%08X%08X%08X%08X%08X%08X",
+ "070701", /* magic */
+ ino++, /* ino */
+ S_IFLNK | mode, /* mode */
+ (long) uid, /* uid */
+ (long) gid, /* gid */
+ 1, /* nlink */
+ (long) default_mtime, /* mtime */
+ (unsigned)strlen(target)+1, /* filesize */
+ 3, /* major */
+ 1, /* minor */
+ 0, /* rmajor */
+ 0, /* rminor */
+ (unsigned)strlen(name) + 1,/* namesize */
+ 0); /* chksum */
+ push_hdr(s);
+ push_string(name);
+ push_pad();
+ push_string(target);
+ push_pad();
+ return 0;
+}
+
+static int cpio_mkslink_line(const char *line)
+{
+ char name[PATH_MAX + 1];
+ char target[PATH_MAX + 1];
+ unsigned int mode;
+ int uid;
+ int gid;
+ int rc = -1;
+
+ if (5 != sscanf(line, "%" str(PATH_MAX) "s %" str(PATH_MAX) "s %o %d %d", name, target, &mode, &uid, &gid)) {
+ fprintf(stderr, "Unrecognized dir format '%s'", line);
+ goto fail;
+ }
+ rc = cpio_mkslink(name, target, mode, uid, gid);
+ fail:
+ return rc;
+}
+
+static int cpio_mkgeneric(const char *name, unsigned int mode,
uid_t uid, gid_t gid)
{
char s[256];
- time_t mtime = time(NULL);
+ if (name[0] == '/')
+ name++;
sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX"
- "%08X%08X%08X%08X%08X%08ZX%08X",
+ "%08X%08X%08X%08X%08X%08X%08X",
"070701", /* magic */
ino++, /* ino */
- S_IFDIR | mode, /* mode */
+ mode, /* mode */
(long) uid, /* uid */
(long) gid, /* gid */
2, /* nlink */
- (long) mtime, /* mtime */
+ (long) default_mtime, /* mtime */
0, /* filesize */
3, /* major */
1, /* minor */
0, /* rmajor */
0, /* rminor */
- strlen(name) + 1, /* namesize */
+ (unsigned)strlen(name) + 1,/* namesize */
0); /* chksum */
push_hdr(s);
push_rest(name);
+ return 0;
}
-static void cpio_mknod(const char *name, unsigned int mode,
- uid_t uid, gid_t gid, int dev_type,
+enum generic_types {
+ GT_DIR,
+ GT_PIPE,
+ GT_SOCK
+};
+
+struct generic_type {
+ const char *type;
+ mode_t mode;
+};
+
+static struct generic_type generic_type_table[] = {
+ [GT_DIR] = {
+ .type = "dir",
+ .mode = S_IFDIR
+ },
+ [GT_PIPE] = {
+ .type = "pipe",
+ .mode = S_IFIFO
+ },
+ [GT_SOCK] = {
+ .type = "sock",
+ .mode = S_IFSOCK
+ }
+};
+
+static int cpio_mkgeneric_line(const char *line, enum generic_types gt)
+{
+ char name[PATH_MAX + 1];
+ unsigned int mode;
+ int uid;
+ int gid;
+ int rc = -1;
+
+ if (4 != sscanf(line, "%" str(PATH_MAX) "s %o %d %d", name, &mode, &uid, &gid)) {
+ fprintf(stderr, "Unrecognized %s format '%s'",
+ line, generic_type_table[gt].type);
+ goto fail;
+ }
+ mode |= generic_type_table[gt].mode;
+ rc = cpio_mkgeneric(name, mode, uid, gid);
+ fail:
+ return rc;
+}
+
+static int cpio_mkdir_line(const char *line)
+{
+ return cpio_mkgeneric_line(line, GT_DIR);
+}
+
+static int cpio_mkpipe_line(const char *line)
+{
+ return cpio_mkgeneric_line(line, GT_PIPE);
+}
+
+static int cpio_mksock_line(const char *line)
+{
+ return cpio_mkgeneric_line(line, GT_SOCK);
+}
+
+static int cpio_mknod(const char *name, unsigned int mode,
+ uid_t uid, gid_t gid, char dev_type,
unsigned int maj, unsigned int min)
{
char s[256];
- time_t mtime = time(NULL);
if (dev_type == 'b')
mode |= S_IFBLK;
else
mode |= S_IFCHR;
+ if (name[0] == '/')
+ name++;
sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX"
- "%08X%08X%08X%08X%08X%08ZX%08X",
+ "%08X%08X%08X%08X%08X%08X%08X",
"070701", /* magic */
ino++, /* ino */
mode, /* mode */
(long) uid, /* uid */
(long) gid, /* gid */
1, /* nlink */
- (long) mtime, /* mtime */
+ (long) default_mtime, /* mtime */
0, /* filesize */
3, /* major */
1, /* minor */
maj, /* rmajor */
min, /* rminor */
- strlen(name) + 1, /* namesize */
+ (unsigned)strlen(name) + 1,/* namesize */
0); /* chksum */
push_hdr(s);
push_rest(name);
+ return 0;
+}
+
+static int cpio_mknod_line(const char *line)
+{
+ char name[PATH_MAX + 1];
+ unsigned int mode;
+ int uid;
+ int gid;
+ char dev_type;
+ unsigned int maj;
+ unsigned int min;
+ int rc = -1;
+
+ if (7 != sscanf(line, "%" str(PATH_MAX) "s %o %d %d %c %u %u",
+ name, &mode, &uid, &gid, &dev_type, &maj, &min)) {
+ fprintf(stderr, "Unrecognized nod format '%s'", line);
+ goto fail;
+ }
+ rc = cpio_mknod(name, mode, uid, gid, dev_type, maj, min);
+ fail:
+ return rc;
}
-/* 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)
+static int cpio_mkfile(const char *name, const char *location,
+ unsigned int mode, uid_t uid, gid_t gid,
+ unsigned int nlinks)
{
char s[256];
- char *filebuf;
+ char *filebuf = NULL;
struct stat buf;
- int file;
+ long size;
+ int file = -1;
int retval;
+ int rc = -1;
+ int namesize;
int i;
mode |= S_IFREG;
- retval = stat (filename, &buf);
- if (retval) {
- fprintf (stderr, "Filename %s could not be located\n", filename);
+ file = open (location, O_RDONLY);
+ if (file < 0) {
+ fprintf (stderr, "File %s could not be opened for reading\n", location);
goto error;
}
- file = open (filename, O_RDONLY);
- if (file < 0) {
- fprintf (stderr, "Filename %s could not be opened for reading\n", filename);
+ retval = fstat(file, &buf);
+ if (retval) {
+ fprintf(stderr, "File %s could not be stat()'ed\n", location);
goto error;
}
filebuf = malloc(buf.st_size);
if (!filebuf) {
fprintf (stderr, "out of memory\n");
- goto error_close;
+ goto error;
}
retval = read (file, filebuf, buf.st_size);
if (retval < 0) {
- fprintf (stderr, "Can not read %s file\n", filename);
- goto error_free;
+ fprintf (stderr, "Can not read %s file\n", location);
+ goto error;
}
- sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX"
- "%08X%08X%08X%08X%08X%08ZX%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();
+ size = 0;
+ for (i = 1; i <= nlinks; i++) {
+ /* data goes on last link */
+ if (i == nlinks) size = buf.st_size;
- for (i = 0; i < buf.st_size; ++i)
- fputc(filebuf[i], stdout);
- close(file);
- free(filebuf);
- push_pad();
- return;
+ if (name[0] == '/')
+ name++;
+ 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) {
+ if (fwrite(filebuf, size, 1, stdout) != 1) {
+ fprintf(stderr, "writing filebuf failed\n");
+ goto error;
+ }
+ offset += size;
+ push_pad();
+ }
+
+ name += namesize;
+ }
+ ino++;
+ rc = 0;
-error_free:
- free(filebuf);
-error_close:
- close(file);
error:
- exit(-1);
+ if (filebuf) free(filebuf);
+ if (file >= 0) close(file);
+ return rc;
}
-int main (int argc, char *argv[])
+static char *cpio_replace_env(char *new_location)
{
- cpio_mkdir("/dev", 0700, 0, 0);
- cpio_mknod("/dev/console", 0600, 0, 0, 'c', 5, 1);
- cpio_mkdir("/root", 0700, 0, 0);
- cpio_trailer();
+ char expanded[PATH_MAX + 1];
+ char env_var[PATH_MAX + 1];
+ char *start;
+ char *end;
- exit(0);
+ 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;
+ }
- /* silence compiler warnings */
- return 0;
- (void) argc;
- (void) argv;
+ return new_location;
+}
+
+
+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 %n",
+ name, location, &mode, &uid, &gid, &end)) {
+ fprintf(stderr, "Unrecognized file format '%s'", line);
+ goto fail;
+ }
+ 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, cpio_replace_env(location),
+ mode, uid, gid, nlinks);
+ fail:
+ if (dname_len) free(dname);
+ return rc;
+}
+
+static void usage(const char *prog)
+{
+ fprintf(stderr, "Usage:\n"
+ "\t%s [-t <timestamp>] <cpio_list>\n"
+ "\n"
+ "<cpio_list> is a file containing newline separated entries that\n"
+ "describe the files to be included in the initramfs archive:\n"
+ "\n"
+ "# a comment\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"
+ " expands shell variables quoted with ${}\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"
+ "dir /dev 0755 0 0\n"
+ "nod /dev/console 0600 0 0 c 5 1\n"
+ "dir /root 0700 0 0\n"
+ "dir /sbin 0755 0 0\n"
+ "file /sbin/kinit /usr/src/klibc/kinit/kinit 0755 0 0\n"
+ "\n"
+ "<timestamp> is time in seconds since Epoch that will be used\n"
+ "as mtime for symlinks, special files and directories. The default\n"
+ "is to use the current time for these entries.\n",
+ prog);
}
+struct file_handler file_handler_table[] = {
+ {
+ .type = "file",
+ .handler = cpio_mkfile_line,
+ }, {
+ .type = "nod",
+ .handler = cpio_mknod_line,
+ }, {
+ .type = "dir",
+ .handler = cpio_mkdir_line,
+ }, {
+ .type = "slink",
+ .handler = cpio_mkslink_line,
+ }, {
+ .type = "pipe",
+ .handler = cpio_mkpipe_line,
+ }, {
+ .type = "sock",
+ .handler = cpio_mksock_line,
+ }, {
+ .type = NULL,
+ .handler = NULL,
+ }
+};
+
+#define LINE_SIZE (2 * PATH_MAX + 50)
+
+int main (int argc, char *argv[])
+{
+ FILE *cpio_list;
+ char line[LINE_SIZE];
+ char *args, *type;
+ int ec = 0;
+ int line_nr = 0;
+ const char *filename;
+
+ default_mtime = time(NULL);
+ while (1) {
+ int opt = getopt(argc, argv, "t:h");
+ char *invalid;
+
+ if (opt == -1)
+ break;
+ switch (opt) {
+ case 't':
+ default_mtime = strtol(optarg, &invalid, 10);
+ if (!*optarg || *invalid) {
+ fprintf(stderr, "Invalid timestamp: %s\n",
+ optarg);
+ usage(argv[0]);
+ exit(1);
+ }
+ break;
+ case 'h':
+ case '?':
+ usage(argv[0]);
+ exit(opt == 'h' ? 0 : 1);
+ }
+ }
+
+ if (argc - optind != 1) {
+ usage(argv[0]);
+ exit(1);
+ }
+ filename = argv[optind];
+ if (!strcmp(filename, "-"))
+ cpio_list = stdin;
+ else if (!(cpio_list = fopen(filename, "r"))) {
+ fprintf(stderr, "ERROR: unable to open '%s': %s\n\n",
+ filename, strerror(errno));
+ usage(argv[0]);
+ exit(1);
+ }
+
+ while (fgets(line, LINE_SIZE, cpio_list)) {
+ int type_idx;
+ size_t slen = strlen(line);
+
+ line_nr++;
+
+ if ('#' == *line) {
+ /* comment - skip to next line */
+ continue;
+ }
+
+ if (! (type = strtok(line, " \t"))) {
+ fprintf(stderr,
+ "ERROR: incorrect format, could not locate file type line %d: '%s'\n",
+ line_nr, line);
+ ec = -1;
+ break;
+ }
+
+ if ('\n' == *type) {
+ /* a blank line */
+ continue;
+ }
+
+ if (slen == strlen(type)) {
+ /* must be an empty line */
+ continue;
+ }
+
+ if (! (args = strtok(NULL, "\n"))) {
+ fprintf(stderr,
+ "ERROR: incorrect format, newline required line %d: '%s'\n",
+ line_nr, line);
+ ec = -1;
+ }
+
+ for (type_idx = 0; file_handler_table[type_idx].type; type_idx++) {
+ int rc;
+ if (! strcmp(line, file_handler_table[type_idx].type)) {
+ if ((rc = file_handler_table[type_idx].handler(args))) {
+ ec = rc;
+ fprintf(stderr, " line %d\n", line_nr);
+ }
+ break;
+ }
+ }
+
+ if (NULL == file_handler_table[type_idx].type) {
+ fprintf(stderr, "unknown file type line %d: '%s'\n",
+ line_nr, line);
+ }
+ }
+ if (ec == 0)
+ cpio_trailer();
+
+ exit(ec);
+}
projects / linux-flexiantxendom0-3.2.10.git / blobdiff