// SPDX-License-Identifier: GPL-2.0#define _GNU_SOURCE#include <stdio.h>#include <stdlib.h>#include <stdint.h>#include <stdbool.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)#define MIN(a, b) ((a) < (b) ? (a) : (b))#define CPIO_HDR_LEN 110#define CPIO_TRAILER "TRAILER!!!"#define padlen(_off, _align) (((_align) - ((_off) & ((_align) - 1))) % (_align)) /* zero-padding the filename field for data alignment is limited by PATH_MAX */static char padding[PATH_MAX];static unsigned int offset;static unsigned int ino = 721;static time_t default_mtime;static bool do_file_mtime;static bool do_csum = false;static int outfd = STDOUT_FILENO;static unsigned int dalign; struct file_handler { const char *type; int (*handler)(const char *line);}; static int push_buf(const char *name, size_t name_len){ ssize_t len; len = write(outfd, name, name_len); if (len != name_len) return -1; offset += name_len; return 0;} static int push_pad(size_t padlen){ ssize_t len = 0; if (!padlen) return 0; if (padlen < sizeof(padding)) len = write(outfd, padding, padlen); if (len != padlen) return -1; offset += padlen; return 0;} static int push_rest(const char *name, size_t name_len){ ssize_t len; len = write(outfd, name, name_len); if (len != name_len) return -1; offset += name_len; return push_pad(padlen(name_len + CPIO_HDR_LEN, 4));} static int cpio_trailer(void){ int len; unsigned int namesize = sizeof(CPIO_TRAILER); len = dprintf(outfd, "%s%08X%08X%08lX%08lX%08X%08lX" "%08X%08X%08X%08X%08X%08X%08X", do_csum ? "070702" : "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 */ namesize, /* namesize */ 0); /* chksum */ offset += len; if (len != CPIO_HDR_LEN || push_rest(CPIO_TRAILER, namesize) < 0 || push_pad(padlen(offset, 512)) < 0) return -1; if (fsync(outfd) < 0 && errno != EINVAL) return -1; return 0;} static int cpio_mkslink(const char *name, const char *target, unsigned int mode, uid_t uid, gid_t gid){ int len; unsigned int namesize, targetsize = strlen(target) + 1; if (name[0] == '/') name++; namesize = strlen(name) + 1; len = dprintf(outfd, "%s%08X%08X%08lX%08lX%08X%08lX" "%08X%08X%08X%08X%08X%08X%08X", do_csum ? "070702" : "070701", /* magic */ ino++, /* ino */ S_IFLNK | mode, /* mode */ (long) uid, /* uid */ (long) gid, /* gid */ 1, /* nlink */ (long) default_mtime, /* mtime */ targetsize, /* filesize */ 3, /* major */ 1, /* minor */ 0, /* rmajor */ 0, /* rminor */ namesize, /* namesize */ 0); /* chksum */ offset += len; if (len != CPIO_HDR_LEN || push_buf(name, namesize) < 0 || push_pad(padlen(offset, 4)) < 0 || push_buf(target, targetsize) < 0 || push_pad(padlen(offset, 4)) < 0) return -1; 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){ int len; unsigned int namesize; if (name[0] == '/') name++; namesize = strlen(name) + 1; len = dprintf(outfd, "%s%08X%08X%08lX%08lX%08X%08lX" "%08X%08X%08X%08X%08X%08X%08X", do_csum ? "070702" : "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 */ namesize, /* namesize */ 0); /* chksum */ offset += len; if (len != CPIO_HDR_LEN || push_rest(name, namesize) < 0) return -1; return 0;} enum generic_types { GT_DIR, GT_PIPE, GT_SOCK}; struct generic_type { const char *type; mode_t mode;}; static const 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){ int len; unsigned int namesize; if (dev_type == 'b') mode |= S_IFBLK; else mode |= S_IFCHR; if (name[0] == '/') name++; namesize = strlen(name) + 1; len = dprintf(outfd, "%s%08X%08X%08lX%08lX%08X%08lX" "%08X%08X%08X%08X%08X%08X%08X", do_csum ? "070702" : "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 */ namesize, /* namesize */ 0); /* chksum */ offset += len; if (len != CPIO_HDR_LEN || push_rest(name, namesize) < 0) return -1; 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_csum(int fd, unsigned long size, uint32_t *csum){ while (size) { unsigned char filebuf[65536]; ssize_t this_read; size_t i, this_size = MIN(size, sizeof(filebuf)); this_read = read(fd, filebuf, this_size); if (this_read <= 0 || this_read > this_size) return -1; for (i = 0; i < this_read; i++) *csum += filebuf[i]; size -= this_read; } /* seek back to the start for data segment I/O */ if (lseek(fd, 0, SEEK_SET) < 0) return -1; return 0;} static int cpio_mkfile(const char *name, const char *location, unsigned int mode, uid_t uid, gid_t gid, unsigned int nlinks){ struct stat buf; unsigned long size; int file, retval, len; int rc = -1; time_t mtime; int namesize, namepadlen; unsigned int i; uint32_t csum = 0; ssize_t this_read; 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; } if (do_file_mtime) { mtime = default_mtime; } else { mtime = buf.st_mtime; if (mtime > 0xffffffff) { fprintf(stderr, "%s: Timestamp exceeds maximum cpio timestamp, clipping.\n", location); mtime = 0xffffffff; } if (mtime < 0) { fprintf(stderr, "%s: Timestamp negative, clipping.\n", location); mtime = 0; } } if (buf.st_size > 0xffffffff) { fprintf(stderr, "%s: Size exceeds maximum cpio file size\n", location); goto error; } if (do_csum && cpio_mkfile_csum(file, buf.st_size, &csum) < 0) { fprintf(stderr, "Failed to checksum file %s\n", location); goto error; } size = 0; namepadlen = 0; for (i = 1; i <= nlinks; i++) { if (name[0] == '/') name++; namesize = strlen(name) + 1; /* data goes on last link, after any alignment padding */ if (i == nlinks) size = buf.st_size; if (dalign && size > dalign) { namepadlen = padlen(offset + CPIO_HDR_LEN + namesize, dalign); if (namesize + namepadlen > PATH_MAX) { fprintf(stderr, "%s: best-effort alignment %u missed\n", name, dalign); namepadlen = 0; } } len = dprintf(outfd, "%s%08X%08X%08lX%08lX%08X%08lX" "%08lX%08X%08X%08X%08X%08X%08X", do_csum ? "070702" : "070701", /* magic */ ino, /* ino */ mode, /* mode */ (long) uid, /* uid */ (long) gid, /* gid */ nlinks, /* nlink */ (long) mtime, /* mtime */ size, /* filesize */ 3, /* major */ 1, /* minor */ 0, /* rmajor */ 0, /* rminor */ namesize + namepadlen, /* namesize */ size ? csum : 0); /* chksum */ offset += len; if (len != CPIO_HDR_LEN || push_buf(name, namesize) < 0 || push_pad(namepadlen ? namepadlen : padlen(offset, 4)) < 0) goto error; if (size) { this_read = copy_file_range(file, NULL, outfd, NULL, size, 0); if (this_read > 0) { if (this_read > size) goto error; offset += this_read; size -= this_read; } /* short or failed copy falls back to read/write... */ } while (size) { unsigned char filebuf[65536]; size_t this_size = MIN(size, sizeof(filebuf)); this_read = read(file, filebuf, this_size); if (this_read <= 0 || this_read > this_size) { fprintf(stderr, "Can not read %s file\n", location); goto error; } if (write(outfd, filebuf, this_read) != this_read) { fprintf(stderr, "writing filebuf failed\n"); goto error; } offset += this_read; size -= this_read; } if (push_pad(padlen(offset, 4)) < 0) goto error; name += namesize; } ino++; rc = 0; error: if (file >= 0) close(file); return rc;} Lines 1–500 of 781. 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// SPDX-License-Identifier: GPL-2.0 #define _GNU_SOURCE #include <stdio.h> #include <stdlib.h> #include <stdint.h> #include <stdbool.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) #define MIN(a, b) ((a) < (b) ? (a) : (b)) #define CPIO_HDR_LEN 110 #define CPIO_TRAILER "TRAILER!!!" #define padlen(_off, _align) (((_align) - ((_off) & ((_align) - 1))) % (_align)) /* zero-padding the filename field for data alignment is limited by PATH_MAX */ static char padding[PATH_MAX]; static unsigned int offset; static unsigned int ino = 721; static time_t default_mtime; static bool do_file_mtime; static bool do_csum = false; static int outfd = STDOUT_FILENO; static unsigned int dalign; struct file_handler { const char *type; int (*handler)(const char *line); }; static int push_buf(const char *name, size_t name_len) { ssize_t len; len = write(outfd, name, name_len); if (len != name_len) return -1; offset += name_len; return 0; } static int push_pad(size_t padlen) { ssize_t len = 0; if (!padlen) return 0; if (padlen < sizeof(padding)) len = write(outfd, padding, padlen); if (len != padlen) return -1; offset += padlen; return 0; } static int push_rest(const char *name, size_t name_len) { ssize_t len; len = write(outfd, name, name_len); if (len != name_len) return -1; offset += name_len; return push_pad(padlen(name_len + CPIO_HDR_LEN, 4)); } static int cpio_trailer(void) { int len; unsigned int namesize = sizeof(CPIO_TRAILER); len = dprintf(outfd, "%s%08X%08X%08lX%08lX%08X%08lX" "%08X%08X%08X%08X%08X%08X%08X", do_csum ? "070702" : "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 */ namesize, /* namesize */ 0); /* chksum */ offset += len; if (len != CPIO_HDR_LEN || push_rest(CPIO_TRAILER, namesize) < 0 || push_pad(padlen(offset, 512)) < 0) return -1; if (fsync(outfd) < 0 && errno != EINVAL) return -1; return 0; } static int cpio_mkslink(const char *name, const char *target, unsigned int mode, uid_t uid, gid_t gid) { int len; unsigned int namesize, targetsize = strlen(target) + 1; if (name[0] == '/') name++; namesize = strlen(name) + 1; len = dprintf(outfd, "%s%08X%08X%08lX%08lX%08X%08lX" "%08X%08X%08X%08X%08X%08X%08X", do_csum ? "070702" : "070701", /* magic */ ino++, /* ino */ S_IFLNK | mode, /* mode */ (long) uid, /* uid */ (long) gid, /* gid */ 1, /* nlink */ (long) default_mtime, /* mtime */ targetsize, /* filesize */ 3, /* major */ 1, /* minor */ 0, /* rmajor */ 0, /* rminor */ namesize, /* namesize */ 0); /* chksum */ offset += len; if (len != CPIO_HDR_LEN || push_buf(name, namesize) < 0 || push_pad(padlen(offset, 4)) < 0 || push_buf(target, targetsize) < 0 || push_pad(padlen(offset, 4)) < 0) return -1; 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) { int len; unsigned int namesize; if (name[0] == '/') name++; namesize = strlen(name) + 1; len = dprintf(outfd, "%s%08X%08X%08lX%08lX%08X%08lX" "%08X%08X%08X%08X%08X%08X%08X", do_csum ? "070702" : "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 */ namesize, /* namesize */ 0); /* chksum */ offset += len; if (len != CPIO_HDR_LEN || push_rest(name, namesize) < 0) return -1; return 0; } enum generic_types { GT_DIR, GT_PIPE, GT_SOCK }; struct generic_type { const char *type; mode_t mode; }; static const 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) { int len; unsigned int namesize; if (dev_type == 'b') mode |= S_IFBLK; else mode |= S_IFCHR; if (name[0] == '/') name++; namesize = strlen(name) + 1; len = dprintf(outfd, "%s%08X%08X%08lX%08lX%08X%08lX" "%08X%08X%08X%08X%08X%08X%08X", do_csum ? "070702" : "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 */ namesize, /* namesize */ 0); /* chksum */ offset += len; if (len != CPIO_HDR_LEN || push_rest(name, namesize) < 0) return -1; 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_csum(int fd, unsigned long size, uint32_t *csum) { while (size) { unsigned char filebuf[65536]; ssize_t this_read; size_t i, this_size = MIN(size, sizeof(filebuf)); this_read = read(fd, filebuf, this_size); if (this_read <= 0 || this_read > this_size) return -1; for (i = 0; i < this_read; i++) *csum += filebuf[i]; size -= this_read; } /* seek back to the start for data segment I/O */ if (lseek(fd, 0, SEEK_SET) < 0) return -1; return 0; } static int cpio_mkfile(const char *name, const char *location, unsigned int mode, uid_t uid, gid_t gid, unsigned int nlinks) { struct stat buf; unsigned long size; int file, retval, len; int rc = -1; time_t mtime; int namesize, namepadlen; unsigned int i; uint32_t csum = 0; ssize_t this_read; 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; } if (do_file_mtime) { mtime = default_mtime; } else { mtime = buf.st_mtime; if (mtime > 0xffffffff) { fprintf(stderr, "%s: Timestamp exceeds maximum cpio timestamp, clipping.\n", location); mtime = 0xffffffff; } if (mtime < 0) { fprintf(stderr, "%s: Timestamp negative, clipping.\n", location); mtime = 0; } } if (buf.st_size > 0xffffffff) { fprintf(stderr, "%s: Size exceeds maximum cpio file size\n", location); goto error; } if (do_csum && cpio_mkfile_csum(file, buf.st_size, &csum) < 0) { fprintf(stderr, "Failed to checksum file %s\n", location); goto error; } size = 0; namepadlen = 0; for (i = 1; i <= nlinks; i++) { if (name[0] == '/') name++; namesize = strlen(name) + 1; /* data goes on last link, after any alignment padding */ if (i == nlinks) size = buf.st_size; if (dalign && size > dalign) { namepadlen = padlen(offset + CPIO_HDR_LEN + namesize, dalign); if (namesize + namepadlen > PATH_MAX) { fprintf(stderr, "%s: best-effort alignment %u missed\n", name, dalign); namepadlen = 0; } } len = dprintf(outfd, "%s%08X%08X%08lX%08lX%08X%08lX" "%08lX%08X%08X%08X%08X%08X%08X", do_csum ? "070702" : "070701", /* magic */ ino, /* ino */ mode, /* mode */ (long) uid, /* uid */ (long) gid, /* gid */ nlinks, /* nlink */ (long) mtime, /* mtime */ size, /* filesize */ 3, /* major */ 1, /* minor */ 0, /* rmajor */ 0, /* rminor */ namesize + namepadlen, /* namesize */ size ? csum : 0); /* chksum */ offset += len; if (len != CPIO_HDR_LEN || push_buf(name, namesize) < 0 || push_pad(namepadlen ? namepadlen : padlen(offset, 4)) < 0) goto error; if (size) { this_read = copy_file_range(file, NULL, outfd, NULL, size, 0); if (this_read > 0) { if (this_read > size) goto error; offset += this_read; size -= this_read; } /* short or failed copy falls back to read/write... */ } while (size) { unsigned char filebuf[65536]; size_t this_size = MIN(size, sizeof(filebuf)); this_read = read(file, filebuf, this_size); if (this_read <= 0 || this_read > this_size) { fprintf(stderr, "Can not read %s file\n", location); goto error; } if (write(outfd, filebuf, this_read) != this_read) { fprintf(stderr, "writing filebuf failed\n"); goto error; } offset += this_read; size -= this_read; } if (push_pad(padlen(offset, 4)) < 0) goto error; name += namesize; } ino++; rc = 0; error: if (file >= 0) close(file); return rc; }