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Diffstat (limited to 'usr/gen_init_cpio.c')
-rw-r--r--usr/gen_init_cpio.c103
1 files changed, 80 insertions, 23 deletions
diff --git a/usr/gen_init_cpio.c b/usr/gen_init_cpio.c
index 7abc07f0fcd..225ad244cf8 100644
--- a/usr/gen_init_cpio.c
+++ b/usr/gen_init_cpio.c
@@ -22,6 +22,7 @@
static unsigned int offset;
static unsigned int ino = 721;
+static time_t default_mtime;
struct file_handler {
const char *type;
@@ -102,8 +103,9 @@ static int cpio_mkslink(const char *name, const char *target,
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%08X%08X",
"070701", /* magic */
@@ -112,7 +114,7 @@ static int cpio_mkslink(const char *name, const char *target,
(long) uid, /* uid */
(long) gid, /* gid */
1, /* nlink */
- (long) mtime, /* mtime */
+ (long) default_mtime, /* mtime */
(unsigned)strlen(target)+1, /* filesize */
3, /* major */
1, /* minor */
@@ -150,8 +152,9 @@ 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%08X%08X",
"070701", /* magic */
@@ -160,7 +163,7 @@ static int cpio_mkgeneric(const char *name, unsigned int mode,
(long) uid, /* uid */
(long) gid, /* gid */
2, /* nlink */
- (long) mtime, /* mtime */
+ (long) default_mtime, /* mtime */
0, /* filesize */
3, /* major */
1, /* minor */
@@ -238,13 +241,14 @@ static int cpio_mknod(const char *name, unsigned int mode,
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%08X%08X",
"070701", /* magic */
@@ -253,7 +257,7 @@ static int cpio_mknod(const char *name, unsigned int mode,
(long) uid, /* uid */
(long) gid, /* gid */
1, /* nlink */
- (long) mtime, /* mtime */
+ (long) default_mtime, /* mtime */
0, /* filesize */
3, /* major */
1, /* minor */
@@ -299,22 +303,22 @@ static int cpio_mkfile(const char *name, const char *location,
int retval;
int rc = -1;
int namesize;
- int i;
+ unsigned int i;
mode |= S_IFREG;
- retval = stat (location, &buf);
- if (retval) {
- fprintf (stderr, "File %s could not be located\n", location);
- goto error;
- }
-
file = open (location, O_RDONLY);
if (file < 0) {
fprintf (stderr, "File %s could not be opened for reading\n", location);
goto error;
}
+ 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");
@@ -332,6 +336,8 @@ static int cpio_mkfile(const char *name, const char *location,
/* data goes on last link */
if (i == nlinks) size = buf.st_size;
+ if (name[0] == '/')
+ name++;
namesize = strlen(name) + 1;
sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX"
"%08lX%08X%08X%08X%08X%08X%08X",
@@ -354,7 +360,10 @@ static int cpio_mkfile(const char *name, const char *location,
push_pad();
if (size) {
- fwrite(filebuf, size, 1, stdout);
+ if (fwrite(filebuf, size, 1, stdout) != 1) {
+ fprintf(stderr, "writing filebuf failed\n");
+ goto error;
+ }
offset += size;
push_pad();
}
@@ -370,6 +379,23 @@ error:
return rc;
}
+static char *cpio_replace_env(char *new_location)
+{
+ char expanded[PATH_MAX + 1];
+ char *start, *end, *var;
+
+ while ((start = strstr(new_location, "${")) &&
+ (end = strchr(start + 2, '}'))) {
+ *start = *end = 0;
+ var = getenv(start + 2);
+ snprintf(expanded, sizeof expanded, "%s%s%s",
+ new_location, var ? var : "", end + 1);
+ strcpy(new_location, expanded);
+ }
+
+ return new_location;
+}
+
static int cpio_mkfile_line(const char *line)
{
char name[PATH_MAX + 1];
@@ -415,16 +441,17 @@ 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;
}
-void usage(const char *prog)
+static void usage(const char *prog)
{
fprintf(stderr, "Usage:\n"
- "\t%s <cpio_list>\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"
@@ -439,6 +466,7 @@ 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"
@@ -454,7 +482,11 @@ void usage(const char *prog)
"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",
+ "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);
}
@@ -492,17 +524,42 @@ int main (int argc, char *argv[])
char *args, *type;
int ec = 0;
int line_nr = 0;
+ const char *filename;
- if (2 != argc) {
+ 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);
}
-
- if (!strcmp(argv[1], "-"))
+ filename = argv[optind];
+ if (!strcmp(filename, "-"))
cpio_list = stdin;
- else if (! (cpio_list = fopen(argv[1], "r"))) {
+ else if (!(cpio_list = fopen(filename, "r"))) {
fprintf(stderr, "ERROR: unable to open '%s': %s\n\n",
- argv[1], strerror(errno));
+ filename, strerror(errno));
usage(argv[0]);
exit(1);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 06:43:58 +0000