#include <unistd.h>
#include <time.h>
#include <fcntl.h>
-#include <errno.h>
-#include <ctype.h>
-#include <limits.h>
-
-#define xstr(s) #s
-#define str(s) xstr(s)
static unsigned int offset;
static unsigned int ino = 721;
-struct file_type {
- const char *type;
- int (*handler)(const char *line);
-};
-
static void push_string(const char *name)
{
unsigned int name_len = strlen(name) + 1;
}
}
-static int cpio_mkdir(const char *name, unsigned int mode,
+static void cpio_mkdir(const char *name, unsigned int mode,
uid_t uid, gid_t gid)
{
char s[256];
0); /* chksum */
push_hdr(s);
push_rest(name);
- return 0;
-}
-
-static int cpio_mkdir_line(const char *line)
-{
- 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 dir format '%s'", line);
- goto fail;
- }
- rc = cpio_mkdir(name, mode, uid, gid);
- fail:
- return rc;
}
-static int cpio_mknod(const char *name, unsigned int mode,
- uid_t uid, gid_t gid, char dev_type,
+static void cpio_mknod(const char *name, unsigned int mode,
+ uid_t uid, gid_t gid, int dev_type,
unsigned int maj, unsigned int min)
{
char s[256];
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... */
-static int cpio_mkfile(const char *name, const char *location,
+void cpio_mkfile(const char *filename, const char *location,
unsigned int mode, uid_t uid, gid_t gid)
{
char s[256];
- char *filebuf = NULL;
+ char *filebuf;
struct stat buf;
- int file = -1;
+ int file;
int retval;
int i;
- int rc = -1;
mode |= S_IFREG;
- retval = stat (location, &buf);
+ retval = stat (filename, &buf);
if (retval) {
- fprintf (stderr, "File %s could not be located\n", location);
+ fprintf (stderr, "Filename %s could not be located\n", filename);
goto error;
}
- file = open (location, O_RDONLY);
+ file = open (filename, O_RDONLY);
if (file < 0) {
- fprintf (stderr, "File %s could not be opened for reading\n", location);
+ 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;
+ goto error_close;
}
retval = read (file, filebuf, buf.st_size);
if (retval < 0) {
- fprintf (stderr, "Can not read %s file\n", location);
- goto error;
+ fprintf (stderr, "Can not read %s file\n", filename);
+ goto error_free;
}
sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX"
1, /* minor */
0, /* rmajor */
0, /* rminor */
- (unsigned)strlen(name) + 1,/* namesize */
+ (unsigned)strlen(location) + 1,/* namesize */
0); /* chksum */
push_hdr(s);
- push_string(name);
+ push_string(location);
push_pad();
for (i = 0; i < buf.st_size; ++i)
fputc(filebuf[i], stdout);
offset += buf.st_size;
+ close(file);
+ free(filebuf);
push_pad();
- rc = 0;
+ return;
+error_free:
+ free(filebuf);
+error_close:
+ close(file);
error:
- if (filebuf) free(filebuf);
- if (file >= 0) close(file);
- return rc;
+ exit(-1);
}
-static int cpio_mkfile_line(const char *line)
-{
- char name[PATH_MAX + 1];
- char location[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, location, &mode, &uid, &gid)) {
- fprintf(stderr, "Unrecognized file format '%s'", line);
- goto fail;
- }
- rc = cpio_mkfile(name, location, mode, uid, gid);
- fail:
- return rc;
-}
-
-void usage(const char *prog)
-{
- fprintf(stderr, "Usage:\n"
- "\t%s <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> \n"
- "dir <name> <mode> <uid> <gid>\n"
- "nod <name> <mode> <uid> <gid> <dev_type> <maj> <min>\n"
- "\n"
- "<name> name of the file/dir/nod in the archive\n"
- "<location> location of the file in the current filesystem\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"
- "\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",
- prog);
-}
-
-struct file_type file_type_table[] = {
- {
- .type = "file",
- .handler = cpio_mkfile_line,
- }, {
- .type = "nod",
- .handler = cpio_mknod_line,
- }, {
- .type = "dir",
- .handler = cpio_mkdir_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;
-
- if (2 != argc) {
- usage(argv[0]);
- exit(1);
- }
-
- if (! (cpio_list = fopen(argv[1], "r"))) {
- fprintf(stderr, "ERROR: unable to open '%s': %s\n\n",
- argv[1], 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;
- }
-
- 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_type_table[type_idx].type; type_idx++) {
- int rc;
- if (! strcmp(line, file_type_table[type_idx].type)) {
- if ((rc = file_type_table[type_idx].handler(args))) {
- ec = rc;
- fprintf(stderr, " line %d\n", line_nr);
- }
- break;
- }
- }
-
- if (NULL == file_type_table[type_idx].type) {
- fprintf(stderr, "unknown file type line %d: '%s'\n",
- line_nr, line);
- }
- }
+ cpio_mkdir("/dev", 0755, 0, 0);
+ cpio_mknod("/dev/console", 0600, 0, 0, 'c', 5, 1);
+ cpio_mkdir("/root", 0700, 0, 0);
cpio_trailer();
- exit(ec);
+ exit(0);
+
+ /* silence compiler warnings */
+ return 0;
+ (void) argc;
+ (void) argv;
}
+
git://git.onelab.eu / linux-2.6.git / blobdiff