From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- usr/Makefile | 65 +++++++ usr/gen_init_cpio.c | 512 +++++++++++++++++++++++++++++++++++++++++++++++++++ usr/initramfs_data.S | 30 +++ 3 files changed, 607 insertions(+) create mode 100644 usr/Makefile create mode 100644 usr/gen_init_cpio.c create mode 100644 usr/initramfs_data.S (limited to 'usr') diff --git a/usr/Makefile b/usr/Makefile new file mode 100644 index 00000000000..248d5551029 --- /dev/null +++ b/usr/Makefile @@ -0,0 +1,65 @@ + +obj-y := initramfs_data.o + +hostprogs-y := gen_init_cpio + +clean-files := initramfs_data.cpio.gz initramfs_list + +# initramfs_data.o contains the initramfs_data.cpio.gz image. +# The image is included using .incbin, a dependency which is not +# tracked automatically. +$(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio.gz FORCE + +ifdef CONFIG_INITRAMFS_ROOT_UID +gen_initramfs_args += -u $(CONFIG_INITRAMFS_ROOT_UID) +endif + +ifdef CONFIG_INITRAMFS_ROOT_GID +gen_initramfs_args += -g $(CONFIG_INITRAMFS_ROOT_GID) +endif + +# The $(shell echo $(CONFIG_INITRAMFS_SOURCE)) is to remove the +# gratuitous begin and end quotes from the Kconfig string type. +# Internal, escaped quotes in the Kconfig string will loose the +# escape and become active quotes. +quotefixed_initramfs_source := $(shell echo $(CONFIG_INITRAMFS_SOURCE)) + +filechk_initramfs_list = $(CONFIG_SHELL) \ + $(srctree)/scripts/gen_initramfs_list.sh $(gen_initramfs_args) $(quotefixed_initramfs_source) + +$(obj)/initramfs_list: FORCE + $(call filechk,initramfs_list) + +quiet_cmd_cpio = CPIO $@ + cmd_cpio = ./$< $(obj)/initramfs_list > $@ + + +# Check if the INITRAMFS_SOURCE is a cpio archive +ifneq (,$(findstring .cpio,$(quotefixed_initramfs_source))) + +# INITRAMFS_SOURCE has a cpio archive - verify that it's a single file +ifneq (1,$(words $(quotefixed_initramfs_source))) +$(error Only a single file may be specified in CONFIG_INITRAMFS_SOURCE (="$(quotefixed_initramfs_source)") when a cpio archive is directly specified.) +endif +# Now use the cpio archive directly +initramfs_data_cpio = $(quotefixed_initramfs_source) +targets += $(quotefixed_initramfs_source) + +else + +# INITRAMFS_SOURCE is not a cpio archive - create one +$(obj)/initramfs_data.cpio: $(obj)/gen_init_cpio \ + $(initramfs-y) $(obj)/initramfs_list FORCE + $(call if_changed,cpio) + +targets += initramfs_data.cpio +initramfs_data_cpio = $(obj)/initramfs_data.cpio + +endif + + +$(obj)/initramfs_data.cpio.gz: $(initramfs_data_cpio) FORCE + $(call if_changed,gzip) + +targets += initramfs_data.cpio.gz + diff --git a/usr/gen_init_cpio.c b/usr/gen_init_cpio.c new file mode 100644 index 00000000000..33dbcbf77c5 --- /dev/null +++ b/usr/gen_init_cpio.c @@ -0,0 +1,512 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * Original work by Jeff Garzik + * + * External file lists, symlink, pipe and fifo support by Thayne Harbaugh + */ + +#define xstr(s) #s +#define str(s) xstr(s) + +static unsigned int offset; +static unsigned int ino = 721; + +struct file_handler { + const char *type; + int (*handler)(const char *line); +}; + +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; + unsigned int tmp_ofs; + + fputs(name, stdout); + putchar(0); + offset += name_len; + + tmp_ofs = name_len + 110; + while (tmp_ofs & 3) { + putchar(0); + offset++; + tmp_ofs++; + } +} + +static void push_hdr(const char *s) +{ + fputs(s, stdout); + offset += 110; +} + +static void cpio_trailer(void) +{ + char s[256]; + const char name[] = "TRAILER!!!"; + + sprintf(s, "%s%08X%08X%08lX%08lX%08X%08lX" + "%08X%08X%08X%08X%08X%08X%08X", + "070701", /* magic */ + 0, /* ino */ + 0, /* mode */ + (long) 0, /* uid */ + (long) 0, /* gid */ + 1, /* nlink */ + (long) 0, /* mtime */ + 0, /* filesize */ + 0, /* major */ + 0, /* minor */ + 0, /* rmajor */ + 0, /* rminor */ + (unsigned)strlen(name)+1, /* namesize */ + 0); /* chksum */ + push_hdr(s); + push_rest(name); + + while (offset % 512) { + putchar(0); + offset++; + } +} + +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); + + 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) 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); + + 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 */ + 2, /* nlink */ + (long) mtime, /* mtime */ + 0, /* filesize */ + 3, /* major */ + 1, /* minor */ + 0, /* rmajor */ + 0, /* rminor */ + (unsigned)strlen(name) + 1,/* namesize */ + 0); /* chksum */ + push_hdr(s); + push_rest(name); + return 0; +} + +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; + + 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) mtime, /* mtime */ + 0, /* filesize */ + 3, /* major */ + 1, /* minor */ + maj, /* rmajor */ + min, /* rminor */ + (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... */ +static int cpio_mkfile(const char *name, const char *location, + unsigned int mode, uid_t uid, gid_t gid) +{ + char s[256]; + char *filebuf = NULL; + struct stat buf; + int file = -1; + int retval; + int rc = -1; + + 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; + } + + filebuf = malloc(buf.st_size); + if (!filebuf) { + fprintf (stderr, "out of memory\n"); + goto error; + } + + retval = read (file, filebuf, buf.st_size); + if (retval < 0) { + 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%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(); + + fwrite(filebuf, buf.st_size, 1, stdout); + offset += buf.st_size; + push_pad(); + rc = 0; + +error: + if (filebuf) free(filebuf); + if (file >= 0) close(file); + return rc; +} + +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 \n" + "\n" + " 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 \n" + "dir \n" + "nod \n" + "slink \n" + "pipe \n" + "sock \n" + "\n" + " name of the file/dir/nod/etc in the archive\n" + " location of the file in the current filesystem\n" + " link target\n" + " mode/permissions of the file\n" + " user id (0=root)\n" + " group id (0=root)\n" + " device type (b=block, c=character)\n" + " major number of nod\n" + " 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_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; + + 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_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); + } + } + cpio_trailer(); + + exit(ec); +} diff --git a/usr/initramfs_data.S b/usr/initramfs_data.S new file mode 100644 index 00000000000..c2e1ad424f4 --- /dev/null +++ b/usr/initramfs_data.S @@ -0,0 +1,30 @@ +/* + initramfs_data includes the compressed binary that is the + filesystem used for early user space. + Note: Older versions of "as" (prior to binutils 2.11.90.0.23 + released on 2001-07-14) dit not support .incbin. + If you are forced to use older binutils than that then the + following trick can be applied to create the resulting binary: + + + ld -m elf_i386 --format binary --oformat elf32-i386 -r \ + -T initramfs_data.scr initramfs_data.cpio.gz -o initramfs_data.o + ld -m elf_i386 -r -o built-in.o initramfs_data.o + + initramfs_data.scr looks like this: +SECTIONS +{ + .init.ramfs : { *(.data) } +} + + The above example is for i386 - the parameters vary from architectures. + Eventually look up LDFLAGS_BLOB in an older version of the + arch/$(ARCH)/Makefile to see the flags used before .incbin was introduced. + + Using .incbin has the advantage over ld that the correct flags are set + in the ELF header, as required by certain architectures. +*/ + +.section .init.ramfs,"a" +.incbin "usr/initramfs_data.cpio.gz" + -- cgit v1.2.3