#include <stdio.h>#include <stdlib.h>#include <sys/types.h>#include <sys/stat.h>#include <string.h>#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){ 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]; 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]; if (name[0] == '/') name++; 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) default_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]; 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 */ ino++, /* ino */ mode, /* mode */ (long) uid, /* uid */ (long) gid, /* gid */ 1, /* nlink */ (long) default_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;} 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 = NULL; struct stat buf; long size; int file = -1; int retval; int rc = -1; int namesize; int i; mode |= S_IFREG; 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"); goto error; } retval = read (file, filebuf, buf.st_size); if (retval < 0) { fprintf (stderr, "Can not read %s file\n", location); goto error; } size = 0; for (i = 1; i <= nlinks; i++) { /* 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", "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: if (filebuf) free(filebuf); if (file >= 0) close(file); return rc;} static char *cpio_replace_env(char *new_location){ char expanded[PATH_MAX + 1]; char env_var[PATH_MAX + 1]; char *start; char *end; 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; } 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[] = {Lines 1–500 of 630. Load more
#include <stdio.h> #include <stdlib.h> #include <sys/types.h> #include <sys/stat.h> #include <string.h> #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) { 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]; 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]; if (name[0] == '/') name++; 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) default_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]; 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 */ ino++, /* ino */ mode, /* mode */ (long) uid, /* uid */ (long) gid, /* gid */ 1, /* nlink */ (long) default_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; } 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 = NULL; struct stat buf; long size; int file = -1; int retval; int rc = -1; int namesize; int i; mode |= S_IFREG; 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"); goto error; } retval = read (file, filebuf, buf.st_size); if (retval < 0) { fprintf (stderr, "Can not read %s file\n", location); goto error; } size = 0; for (i = 1; i <= nlinks; i++) { /* 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", "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: if (filebuf) free(filebuf); if (file >= 0) close(file); return rc; } static char *cpio_replace_env(char *new_location) { char expanded[PATH_MAX + 1]; char env_var[PATH_MAX + 1]; char *start; char *end; 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; } 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[] = {