00001
00010 #include "system.h"
00011
00012 #include <rpmio.h>
00013 #include <rpmlib.h>
00014
00015 #include "cpio.h"
00016 #include "fsm.h"
00017
00018 #include "debug.h"
00019
00020
00021
00022
00023 int _cpio_debug = 0;
00024
00033 static int strntoul(const char *str, char **endptr, int base, size_t num)
00034
00035
00036 {
00037 char * buf, * end;
00038 unsigned long ret;
00039
00040 buf = alloca(num + 1);
00041 strncpy(buf, str, num);
00042 buf[num] = '\0';
00043
00044 ret = strtoul(buf, &end, base);
00045 if (*end != '\0')
00046 *endptr = ((char *)str) + (end - buf);
00047 else
00048 *endptr = ((char *)str) + strlen(buf);
00049
00050 return ret;
00051 }
00052
00053 #define GET_NUM_FIELD(phys, log) \
00054 log = strntoul(phys, &end, 16, sizeof(phys)); \
00055 if ( (end - phys) != sizeof(phys) ) return CPIOERR_BAD_HEADER;
00056 #define SET_NUM_FIELD(phys, val, space) \
00057 sprintf(space, "%8.8lx", (unsigned long) (val)); \
00058 memcpy(phys, space, 8)
00059
00060 int cpioTrailerWrite(FSM_t fsm)
00061 {
00062 struct cpioCrcPhysicalHeader * hdr =
00063 (struct cpioCrcPhysicalHeader *)fsm->rdbuf;
00064 int rc;
00065
00066 memset(hdr, '0', PHYS_HDR_SIZE);
00067 memcpy(hdr->magic, CPIO_NEWC_MAGIC, sizeof(hdr->magic));
00068 memcpy(hdr->nlink, "00000001", 8);
00069 memcpy(hdr->namesize, "0000000b", 8);
00070 memcpy(fsm->rdbuf + PHYS_HDR_SIZE, CPIO_TRAILER, sizeof(CPIO_TRAILER));
00071
00072
00073 fsm->rdnb = PHYS_HDR_SIZE + sizeof(CPIO_TRAILER);
00074 rc = fsmNext(fsm, FSM_DWRITE);
00075
00076
00077
00078
00079
00080 if (!rc)
00081 rc = fsmNext(fsm, FSM_PAD);
00082
00083 return rc;
00084 }
00085
00086 int cpioHeaderWrite(FSM_t fsm, struct stat * st)
00087 {
00088 struct cpioCrcPhysicalHeader * hdr = (struct cpioCrcPhysicalHeader *)fsm->rdbuf;
00089 char field[64];
00090 size_t len;
00091 dev_t dev;
00092 int rc = 0;
00093
00094 if (_cpio_debug)
00095 fprintf(stderr, " cpioHeaderWrite(%p, %p)\n", fsm, st);
00096
00097 memcpy(hdr->magic, CPIO_NEWC_MAGIC, sizeof(hdr->magic));
00098 SET_NUM_FIELD(hdr->inode, st->st_ino, field);
00099 SET_NUM_FIELD(hdr->mode, st->st_mode, field);
00100 SET_NUM_FIELD(hdr->uid, st->st_uid, field);
00101 SET_NUM_FIELD(hdr->gid, st->st_gid, field);
00102 SET_NUM_FIELD(hdr->nlink, st->st_nlink, field);
00103 SET_NUM_FIELD(hdr->mtime, st->st_mtime, field);
00104 SET_NUM_FIELD(hdr->filesize, st->st_size, field);
00105
00106 dev = major((unsigned)st->st_dev); SET_NUM_FIELD(hdr->devMajor, dev, field);
00107 dev = minor((unsigned)st->st_dev); SET_NUM_FIELD(hdr->devMinor, dev, field);
00108 dev = major((unsigned)st->st_rdev); SET_NUM_FIELD(hdr->rdevMajor, dev, field);
00109 dev = minor((unsigned)st->st_rdev); SET_NUM_FIELD(hdr->rdevMinor, dev, field);
00110
00111 len = strlen(fsm->path) + 1; SET_NUM_FIELD(hdr->namesize, len, field);
00112 memcpy(hdr->checksum, "00000000", 8);
00113 memcpy(fsm->rdbuf + PHYS_HDR_SIZE, fsm->path, len);
00114
00115
00116 fsm->rdnb = PHYS_HDR_SIZE + len;
00117 rc = fsmNext(fsm, FSM_DWRITE);
00118 if (!rc && fsm->rdnb != fsm->wrnb)
00119 rc = CPIOERR_WRITE_FAILED;
00120 if (!rc)
00121 rc = fsmNext(fsm, FSM_PAD);
00122
00123 if (!rc && S_ISLNK(st->st_mode)) {
00124 assert(fsm->lpath != NULL);
00125 fsm->rdnb = strlen(fsm->lpath);
00126 memcpy(fsm->rdbuf, fsm->lpath, fsm->rdnb);
00127 rc = fsmNext(fsm, FSM_DWRITE);
00128 if (!rc && fsm->rdnb != fsm->wrnb)
00129 rc = CPIOERR_WRITE_FAILED;
00130 if (!rc)
00131 rc = fsmNext(fsm, FSM_PAD);
00132 }
00133
00134 return rc;
00135 }
00136
00137 int cpioHeaderRead(FSM_t fsm, struct stat * st)
00138
00139 {
00140 struct cpioCrcPhysicalHeader hdr;
00141 int nameSize;
00142 char * end;
00143 int major, minor;
00144 int rc = 0;
00145
00146 if (_cpio_debug)
00147 fprintf(stderr, " cpioHeaderRead(%p, %p)\n", fsm, st);
00148
00149 fsm->wrlen = PHYS_HDR_SIZE;
00150 rc = fsmNext(fsm, FSM_DREAD);
00151 if (!rc && fsm->rdnb != fsm->wrlen)
00152 rc = CPIOERR_READ_FAILED;
00153 if (rc) return rc;
00154 memcpy(&hdr, fsm->wrbuf, fsm->rdnb);
00155
00156 if (strncmp(CPIO_CRC_MAGIC, hdr.magic, sizeof(CPIO_CRC_MAGIC)-1) &&
00157 strncmp(CPIO_NEWC_MAGIC, hdr.magic, sizeof(CPIO_NEWC_MAGIC)-1))
00158 return CPIOERR_BAD_MAGIC;
00159
00160 GET_NUM_FIELD(hdr.inode, st->st_ino);
00161 GET_NUM_FIELD(hdr.mode, st->st_mode);
00162 GET_NUM_FIELD(hdr.uid, st->st_uid);
00163 GET_NUM_FIELD(hdr.gid, st->st_gid);
00164 GET_NUM_FIELD(hdr.nlink, st->st_nlink);
00165 GET_NUM_FIELD(hdr.mtime, st->st_mtime);
00166 GET_NUM_FIELD(hdr.filesize, st->st_size);
00167
00168 GET_NUM_FIELD(hdr.devMajor, major);
00169 GET_NUM_FIELD(hdr.devMinor, minor);
00170
00171 st->st_dev = Makedev(major, minor);
00172
00173
00174 GET_NUM_FIELD(hdr.rdevMajor, major);
00175 GET_NUM_FIELD(hdr.rdevMinor, minor);
00176
00177 st->st_rdev = Makedev(major, minor);
00178
00179
00180 GET_NUM_FIELD(hdr.namesize, nameSize);
00181 if (nameSize >= fsm->wrsize)
00182 return CPIOERR_BAD_HEADER;
00183
00184 { char * t = xmalloc(nameSize + 1);
00185 fsm->wrlen = nameSize;
00186 rc = fsmNext(fsm, FSM_DREAD);
00187 if (!rc && fsm->rdnb != fsm->wrlen)
00188 rc = CPIOERR_BAD_HEADER;
00189 if (rc) {
00190 t = _free(t);
00191 fsm->path = NULL;
00192 return rc;
00193 }
00194 memcpy(t, fsm->wrbuf, fsm->rdnb);
00195 t[nameSize] = '\0';
00196 fsm->path = t;
00197 }
00198
00199 if (S_ISLNK(st->st_mode)) {
00200 rc = fsmNext(fsm, FSM_POS);
00201 if (rc) return rc;
00202 fsm->wrlen = st->st_size;
00203 rc = fsmNext(fsm, FSM_DREAD);
00204 if (!rc && fsm->rdnb != fsm->wrlen)
00205 rc = CPIOERR_READ_FAILED;
00206 if (rc) return rc;
00207 fsm->wrbuf[st->st_size] = '\0';
00208 fsm->lpath = xstrdup(fsm->wrbuf);
00209 }
00210
00211 if (_cpio_debug)
00212 fprintf(stderr, "\t %06o%3d (%4d,%4d)%10d %s\n\t-> %s\n",
00213 (unsigned)st->st_mode, (int)st->st_nlink,
00214 (int)st->st_uid, (int)st->st_gid, (int)st->st_size,
00215 (fsm->path ? fsm->path : ""), (fsm->lpath ? fsm->lpath : ""));
00216
00217 return rc;
00218 }
00219
00220 const char * cpioStrerror(int rc)
00221 {
00222 static char msg[256];
00223 char *s;
00224 int l, myerrno = errno;
00225
00226 strcpy(msg, "cpio: ");
00227 switch (rc) {
00228 default:
00229 s = msg + strlen(msg);
00230 sprintf(s, _("(error 0x%x)"), (unsigned)rc);
00231 s = NULL;
00232 break;
00233 case CPIOERR_BAD_MAGIC: s = _("Bad magic"); break;
00234 case CPIOERR_BAD_HEADER: s = _("Bad/unreadable header"); break;
00235
00236 case CPIOERR_OPEN_FAILED: s = "open"; break;
00237 case CPIOERR_CHMOD_FAILED: s = "chmod"; break;
00238 case CPIOERR_CHOWN_FAILED: s = "chown"; break;
00239 case CPIOERR_WRITE_FAILED: s = "write"; break;
00240 case CPIOERR_UTIME_FAILED: s = "utime"; break;
00241 case CPIOERR_UNLINK_FAILED: s = "unlink"; break;
00242 case CPIOERR_RENAME_FAILED: s = "rename"; break;
00243 case CPIOERR_SYMLINK_FAILED: s = "symlink"; break;
00244 case CPIOERR_STAT_FAILED: s = "stat"; break;
00245 case CPIOERR_LSTAT_FAILED: s = "lstat"; break;
00246 case CPIOERR_MKDIR_FAILED: s = "mkdir"; break;
00247 case CPIOERR_RMDIR_FAILED: s = "rmdir"; break;
00248 case CPIOERR_MKNOD_FAILED: s = "mknod"; break;
00249 case CPIOERR_MKFIFO_FAILED: s = "mkfifo"; break;
00250 case CPIOERR_LINK_FAILED: s = "link"; break;
00251 case CPIOERR_READLINK_FAILED: s = "readlink"; break;
00252 case CPIOERR_READ_FAILED: s = "read"; break;
00253 case CPIOERR_COPY_FAILED: s = "copy"; break;
00254 case CPIOERR_LSETFCON_FAILED: s = "lsetfilecon"; break;
00255
00256 case CPIOERR_HDR_SIZE: s = _("Header size too big"); break;
00257 case CPIOERR_UNKNOWN_FILETYPE: s = _("Unknown file type"); break;
00258 case CPIOERR_MISSING_HARDLINK: s = _("Missing hard link(s)"); break;
00259 case CPIOERR_DIGEST_MISMATCH: s = _("File digest mismatch"); break;
00260 case CPIOERR_INTERNAL: s = _("Internal error"); break;
00261 case CPIOERR_UNMAPPED_FILE: s = _("Archive file not in header"); break;
00262 case CPIOERR_ENOENT: s = strerror(ENOENT); break;
00263 case CPIOERR_ENOTEMPTY: s = strerror(ENOTEMPTY); break;
00264 }
00265
00266 l = sizeof(msg) - strlen(msg) - 1;
00267 if (s != NULL) {
00268 if (l > 0) strncat(msg, s, l);
00269 l -= strlen(s);
00270 }
00271 if ((rc & CPIOERR_CHECK_ERRNO) && myerrno) {
00272 s = _(" failed - ");
00273 if (l > 0) strncat(msg, s, l);
00274 l -= strlen(s);
00275 if (l > 0) strncat(msg, strerror(myerrno), l);
00276 }
00277 return msg;
00278 }