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-rw-r--r--gnu/usr.bin/tar/list.c881
1 files changed, 881 insertions, 0 deletions
diff --git a/gnu/usr.bin/tar/list.c b/gnu/usr.bin/tar/list.c
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index 000000000000..a0c65a334bf2
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+++ b/gnu/usr.bin/tar/list.c
@@ -0,0 +1,881 @@
+/* List a tar archive.
+ Copyright (C) 1988, 1992, 1993 Free Software Foundation
+
+This file is part of GNU Tar.
+
+GNU Tar is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Tar is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Tar; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/*
+ * List a tar archive.
+ *
+ * Also includes support routines for reading a tar archive.
+ *
+ * this version written 26 Aug 1985 by John Gilmore (ihnp4!hoptoad!gnu).
+ */
+
+#include <stdio.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <errno.h>
+#ifndef STDC_HEADERS
+extern int errno;
+#endif
+#include <time.h>
+
+#ifdef BSD42
+#include <sys/file.h>
+#else
+#ifndef V7
+#include <fcntl.h>
+#endif
+#endif
+
+#define isodigit(c) ( ((c) >= '0') && ((c) <= '7') )
+
+#include "tar.h"
+#include "port.h"
+
+extern FILE *msg_file;
+
+long from_oct (); /* Decode octal number */
+void demode (); /* Print file mode */
+void restore_saved_dir_info ();
+PTR ck_malloc ();
+
+union record *head; /* Points to current archive header */
+struct stat hstat; /* Stat struct corresponding */
+int head_standard; /* Tape header is in ANSI format */
+
+int check_exclude ();
+void close_archive ();
+void decode_header ();
+int findgid ();
+int finduid ();
+void name_gather ();
+int name_match ();
+void names_notfound ();
+void open_archive ();
+void print_header ();
+int read_header ();
+void saverec ();
+void skip_file ();
+void skip_extended_headers ();
+
+extern char *quote_copy_string ();
+
+
+/*
+ * Main loop for reading an archive.
+ */
+void
+read_and (do_something)
+ void (*do_something) ();
+{
+ int status = 3; /* Initial status at start of archive */
+ int prev_status;
+ extern time_t new_time;
+ char save_linkflag;
+
+ name_gather (); /* Gather all the names */
+ open_archive (1); /* Open for reading */
+
+ for (;;)
+ {
+ prev_status = status;
+ status = read_header ();
+ switch (status)
+ {
+
+ case 1: /* Valid header */
+ /* We should decode next field (mode) first... */
+ /* Ensure incoming names are null terminated. */
+
+ if (!name_match (current_file_name)
+ || (f_new_files && hstat.st_mtime < new_time)
+ || (f_exclude && check_exclude (current_file_name)))
+ {
+
+ int isextended = 0;
+
+ if (head->header.linkflag == LF_VOLHDR
+ || head->header.linkflag == LF_MULTIVOL
+ || head->header.linkflag == LF_NAMES)
+ {
+ (*do_something) ();
+ continue;
+ }
+ if (f_show_omitted_dirs
+ && head->header.linkflag == LF_DIR)
+ msg ("Omitting %s\n", current_file_name);
+ /* Skip past it in the archive */
+ if (head->header.isextended)
+ isextended = 1;
+ save_linkflag = head->header.linkflag;
+ userec (head);
+ if (isextended)
+ {
+ /* register union record *exhdr;
+
+ for (;;) {
+ exhdr = findrec();
+ if (!exhdr->ext_hdr.isextended) {
+ userec(exhdr);
+ break;
+ }
+ }
+ userec(exhdr);*/
+ skip_extended_headers ();
+ }
+ /* Skip to the next header on the archive */
+ if (save_linkflag != LF_DIR)
+ skip_file ((long) hstat.st_size);
+ continue;
+
+ }
+
+ (*do_something) ();
+ continue;
+
+ /*
+ * If the previous header was good, tell them
+ * that we are skipping bad ones.
+ */
+ case 0: /* Invalid header */
+ userec (head);
+ switch (prev_status)
+ {
+ case 3: /* Error on first record */
+ msg ("Hmm, this doesn't look like a tar archive.");
+ /* FALL THRU */
+ case 2: /* Error after record of zeroes */
+ case 1: /* Error after header rec */
+ msg ("Skipping to next file header...");
+ case 0: /* Error after error */
+ break;
+ }
+ continue;
+
+ case 2: /* Record of zeroes */
+ userec (head);
+ status = prev_status; /* If error after 0's */
+ if (f_ignorez)
+ continue;
+ /* FALL THRU */
+ case EOF: /* End of archive */
+ break;
+ }
+ break;
+ };
+
+ restore_saved_dir_info ();
+ close_archive ();
+ names_notfound (); /* Print names not found */
+}
+
+
+/*
+ * Print a header record, based on tar options.
+ */
+void
+list_archive ()
+{
+ extern char *save_name;
+ int isextended = 0; /* Flag to remember if head is extended */
+
+ /* Save the record */
+ saverec (&head);
+
+ /* Print the header record */
+ if (f_verbose)
+ {
+ if (f_verbose > 1)
+ decode_header (head, &hstat, &head_standard, 0);
+ print_header ();
+ }
+
+ if (f_gnudump && head->header.linkflag == LF_DUMPDIR)
+ {
+ size_t size, written, check;
+ char *data;
+ extern long save_totsize;
+ extern long save_sizeleft;
+
+ userec (head);
+ if (f_multivol)
+ {
+ save_name = current_file_name;
+ save_totsize = hstat.st_size;
+ }
+ for (size = hstat.st_size; size > 0; size -= written)
+ {
+ if (f_multivol)
+ save_sizeleft = size;
+ data = findrec ()->charptr;
+ if (data == NULL)
+ {
+ msg ("EOF in archive file?");
+ break;
+ }
+ written = endofrecs ()->charptr - data;
+ if (written > size)
+ written = size;
+ errno = 0;
+ check = fwrite (data, sizeof (char), written, msg_file);
+ userec ((union record *) (data + written - 1));
+ if (check != written)
+ {
+ msg_perror ("only wrote %ld of %ld bytes to file %s", check, written, current_file_name);
+ skip_file ((long) (size) - written);
+ break;
+ }
+ }
+ if (f_multivol)
+ save_name = 0;
+ saverec ((union record **) 0); /* Unsave it */
+ fputc ('\n', msg_file);
+ fflush (msg_file);
+ return;
+
+ }
+ saverec ((union record **) 0);/* Unsave it */
+ /* Check to see if we have an extended header to skip over also */
+ if (head->header.isextended)
+ isextended = 1;
+
+ /* Skip past the header in the archive */
+ userec (head);
+
+ /*
+ * If we needed to skip any extended headers, do so now, by
+ * reading extended headers and skipping past them in the
+ * archive.
+ */
+ if (isextended)
+ {
+ /* register union record *exhdr;
+
+ for (;;) {
+ exhdr = findrec();
+
+ if (!exhdr->ext_hdr.isextended) {
+ userec(exhdr);
+ break;
+ }
+ userec(exhdr);
+ }*/
+ skip_extended_headers ();
+ }
+
+ if (f_multivol)
+ save_name = current_file_name;
+ /* Skip to the next header on the archive */
+
+ skip_file ((long) hstat.st_size);
+
+ if (f_multivol)
+ save_name = 0;
+}
+
+
+/*
+ * Read a record that's supposed to be a header record.
+ * Return its address in "head", and if it is good, the file's
+ * size in hstat.st_size.
+ *
+ * Return 1 for success, 0 if the checksum is bad, EOF on eof,
+ * 2 for a record full of zeros (EOF marker).
+ *
+ * You must always userec(head) to skip past the header which this
+ * routine reads.
+ */
+int
+read_header ()
+{
+ register int i;
+ register long sum, signed_sum, recsum;
+ register char *p;
+ register union record *header;
+ long from_oct ();
+ char **longp;
+ char *bp, *data;
+ int size, written;
+ static char *next_long_name, *next_long_link;
+ char *name;
+
+recurse:
+
+ header = findrec ();
+ head = header; /* This is our current header */
+ if (NULL == header)
+ return EOF;
+
+ recsum = from_oct (8, header->header.chksum);
+
+ sum = 0;
+ p = header->charptr;
+ for (i = sizeof (*header); --i >= 0;)
+ {
+ /*
+ * We can't use unsigned char here because of old compilers,
+ * e.g. V7.
+ */
+ signed_sum += *p;
+ sum += 0xFF & *p++;
+ }
+
+ /* Adjust checksum to count the "chksum" field as blanks. */
+ for (i = sizeof (header->header.chksum); --i >= 0;)
+ {
+ sum -= 0xFF & header->header.chksum[i];
+ signed_sum -= (char) header->header.chksum[i];
+ }
+ sum += ' ' * sizeof header->header.chksum;
+ signed_sum += ' ' * sizeof header->header.chksum;
+
+ if (sum == 8 * ' ')
+ {
+ /*
+ * This is a zeroed record...whole record is 0's except
+ * for the 8 blanks we faked for the checksum field.
+ */
+ return 2;
+ }
+
+ if (sum != recsum && signed_sum != recsum)
+ return 0;
+
+ /*
+ * Good record. Decode file size and return.
+ */
+ if (header->header.linkflag == LF_LINK)
+ hstat.st_size = 0; /* Links 0 size on tape */
+ else
+ hstat.st_size = from_oct (1 + 12, header->header.size);
+
+ header->header.arch_name[NAMSIZ - 1] = '\0';
+ if (header->header.linkflag == LF_LONGNAME
+ || header->header.linkflag == LF_LONGLINK)
+ {
+ longp = ((header->header.linkflag == LF_LONGNAME)
+ ? &next_long_name
+ : &next_long_link);
+
+ userec (header);
+ if (*longp)
+ free (*longp);
+ bp = *longp = (char *) ck_malloc (hstat.st_size);
+
+ for (size = hstat.st_size;
+ size > 0;
+ size -= written)
+ {
+ data = findrec ()->charptr;
+ if (data == NULL)
+ {
+ msg ("Unexpected EOF on archive file");
+ break;
+ }
+ written = endofrecs ()->charptr - data;
+ if (written > size)
+ written = size;
+
+ bcopy (data, bp, written);
+ bp += written;
+ userec ((union record *) (data + written - 1));
+ }
+ goto recurse;
+ }
+ else
+ {
+ name = (next_long_name
+ ? next_long_name
+ : head->header.arch_name);
+ if (current_file_name)
+ free (current_file_name);
+ current_file_name = ck_malloc (strlen (name) + 1);
+ strcpy (current_file_name, name);
+
+ name = (next_long_link
+ ? next_long_link
+ : head->header.arch_linkname);
+ if (current_link_name)
+ free (current_link_name);
+ current_link_name = ck_malloc (strlen (name) + 1);
+ strcpy (current_link_name, name);
+
+ next_long_link = next_long_name = 0;
+ return 1;
+ }
+}
+
+
+/*
+ * Decode things from a file header record into a "struct stat".
+ * Also set "*stdp" to !=0 or ==0 depending whether header record is "Unix
+ * Standard" tar format or regular old tar format.
+ *
+ * read_header() has already decoded the checksum and length, so we don't.
+ *
+ * If wantug != 0, we want the uid/group info decoded from Unix Standard
+ * tapes (for extraction). If == 0, we are just printing anyway, so save time.
+ *
+ * decode_header should NOT be called twice for the same record, since the
+ * two calls might use different "wantug" values and thus might end up with
+ * different uid/gid for the two calls. If anybody wants the uid/gid they
+ * should decode it first, and other callers should decode it without uid/gid
+ * before calling a routine, e.g. print_header, that assumes decoded data.
+ */
+void
+decode_header (header, st, stdp, wantug)
+ register union record *header;
+ register struct stat *st;
+ int *stdp;
+ int wantug;
+{
+ long from_oct ();
+
+ st->st_mode = from_oct (8, header->header.mode);
+ st->st_mode &= 07777;
+ st->st_mtime = from_oct (1 + 12, header->header.mtime);
+ if (f_gnudump)
+ {
+ st->st_atime = from_oct (1 + 12, header->header.atime);
+ st->st_ctime = from_oct (1 + 12, header->header.ctime);
+ }
+
+ if (0 == strcmp (header->header.magic, TMAGIC))
+ {
+ /* Unix Standard tar archive */
+ *stdp = 1;
+ if (wantug)
+ {
+#ifdef NONAMES
+ st->st_uid = from_oct (8, header->header.uid);
+ st->st_gid = from_oct (8, header->header.gid);
+#else
+ st->st_uid =
+ (*header->header.uname
+ ? finduid (header->header.uname)
+ : from_oct (8, header->header.uid));
+ st->st_gid =
+ (*header->header.gname
+ ? findgid (header->header.gname)
+ : from_oct (8, header->header.gid));
+#endif
+ }
+#if defined(S_IFBLK) || defined(S_IFCHR)
+ switch (header->header.linkflag)
+ {
+ case LF_BLK:
+ case LF_CHR:
+ st->st_rdev = makedev (from_oct (8, header->header.devmajor),
+ from_oct (8, header->header.devminor));
+ }
+#endif
+ }
+ else
+ {
+ /* Old fashioned tar archive */
+ *stdp = 0;
+ st->st_uid = from_oct (8, header->header.uid);
+ st->st_gid = from_oct (8, header->header.gid);
+ st->st_rdev = 0;
+ }
+}
+
+
+/*
+ * Quick and dirty octal conversion.
+ *
+ * Result is -1 if the field is invalid (all blank, or nonoctal).
+ */
+long
+from_oct (digs, where)
+ register int digs;
+ register char *where;
+{
+ register long value;
+
+ while (isspace (*where))
+ { /* Skip spaces */
+ where++;
+ if (--digs <= 0)
+ return -1; /* All blank field */
+ }
+ value = 0;
+ while (digs > 0 && isodigit (*where))
+ { /* Scan til nonoctal */
+ value = (value << 3) | (*where++ - '0');
+ --digs;
+ }
+
+ if (digs > 0 && *where && !isspace (*where))
+ return -1; /* Ended on non-space/nul */
+
+ return value;
+}
+
+
+/*
+ * Actually print it.
+ *
+ * Plain and fancy file header block logging.
+ * Non-verbose just prints the name, e.g. for "tar t" or "tar x".
+ * This should just contain file names, so it can be fed back into tar
+ * with xargs or the "-T" option. The verbose option can give a bunch
+ * of info, one line per file. I doubt anybody tries to parse its
+ * format, or if they do, they shouldn't. Unix tar is pretty random here
+ * anyway.
+ *
+ * Note that print_header uses the globals <head>, <hstat>, and
+ * <head_standard>, which must be set up in advance. This is not very clean
+ * and should be cleaned up. FIXME.
+ */
+#define UGSWIDTH 18 /* min width of User, group, size */
+/* UGSWIDTH of 18 means that with user and group names <= 8 chars the columns
+ never shift during the listing. */
+#define DATEWIDTH 19 /* Last mod date */
+static int ugswidth = UGSWIDTH; /* Max width encountered so far */
+
+void
+print_header ()
+{
+ char modes[11];
+ char *timestamp;
+ char uform[11], gform[11]; /* These hold formatted ints */
+ char *user, *group;
+ char size[24]; /* Holds a formatted long or maj, min */
+ time_t longie; /* To make ctime() call portable */
+ int pad;
+ char *name;
+ extern long baserec;
+
+ if (f_sayblock)
+ fprintf (msg_file, "rec %10d: ", baserec + (ar_record - ar_block));
+ /* annofile(msg_file, (char *)NULL); */
+
+ if (f_verbose <= 1)
+ {
+ /* Just the fax, mam. */
+ char *name;
+
+ name = quote_copy_string (current_file_name);
+ if (name == 0)
+ name = current_file_name;
+ fprintf (msg_file, "%s\n", name);
+ if (name != current_file_name)
+ free (name);
+ }
+ else
+ {
+ /* File type and modes */
+ modes[0] = '?';
+ switch (head->header.linkflag)
+ {
+ case LF_VOLHDR:
+ modes[0] = 'V';
+ break;
+
+ case LF_MULTIVOL:
+ modes[0] = 'M';
+ break;
+
+ case LF_NAMES:
+ modes[0] = 'N';
+ break;
+
+ case LF_LONGNAME:
+ case LF_LONGLINK:
+ msg ("Visible longname error\n");
+ break;
+
+ case LF_SPARSE:
+ case LF_NORMAL:
+ case LF_OLDNORMAL:
+ case LF_LINK:
+ modes[0] = '-';
+ if ('/' == current_file_name[strlen (current_file_name) - 1])
+ modes[0] = 'd';
+ break;
+ case LF_DUMPDIR:
+ modes[0] = 'd';
+ break;
+ case LF_DIR:
+ modes[0] = 'd';
+ break;
+ case LF_SYMLINK:
+ modes[0] = 'l';
+ break;
+ case LF_BLK:
+ modes[0] = 'b';
+ break;
+ case LF_CHR:
+ modes[0] = 'c';
+ break;
+ case LF_FIFO:
+ modes[0] = 'p';
+ break;
+ case LF_CONTIG:
+ modes[0] = 'C';
+ break;
+ }
+
+ demode ((unsigned) hstat.st_mode, modes + 1);
+
+ /* Timestamp */
+ longie = hstat.st_mtime;
+ timestamp = ctime (&longie);
+ timestamp[16] = '\0';
+ timestamp[24] = '\0';
+
+ /* User and group names */
+ if (*head->header.uname && head_standard)
+ {
+ user = head->header.uname;
+ }
+ else
+ {
+ user = uform;
+ (void) sprintf (uform, "%d",
+ from_oct (8, head->header.uid));
+ }
+ if (*head->header.gname && head_standard)
+ {
+ group = head->header.gname;
+ }
+ else
+ {
+ group = gform;
+ (void) sprintf (gform, "%d",
+ from_oct (8, head->header.gid));
+ }
+
+ /* Format the file size or major/minor device numbers */
+ switch (head->header.linkflag)
+ {
+#if defined(S_IFBLK) || defined(S_IFCHR)
+ case LF_CHR:
+ case LF_BLK:
+ (void) sprintf (size, "%d,%d",
+ major (hstat.st_rdev),
+ minor (hstat.st_rdev));
+ break;
+#endif
+ case LF_SPARSE:
+ (void) sprintf (size, "%ld",
+ from_oct (1 + 12, head->header.realsize));
+ break;
+ default:
+ (void) sprintf (size, "%ld", (long) hstat.st_size);
+ }
+
+ /* Figure out padding and print the whole line. */
+ pad = strlen (user) + strlen (group) + strlen (size) + 1;
+ if (pad > ugswidth)
+ ugswidth = pad;
+
+ name = quote_copy_string (current_file_name);
+ if (!name)
+ name = current_file_name;
+ fprintf (msg_file, "%s %s/%s %*s%s %s %s %s",
+ modes,
+ user,
+ group,
+ ugswidth - pad,
+ "",
+ size,
+ timestamp + 4, timestamp + 20,
+ name);
+
+ if (name != current_file_name)
+ free (name);
+ switch (head->header.linkflag)
+ {
+ case LF_SYMLINK:
+ name = quote_copy_string (current_link_name);
+ if (!name)
+ name = current_link_name;
+ fprintf (msg_file, " -> %s\n", name);
+ if (name != current_link_name)
+ free (name);
+ break;
+
+ case LF_LINK:
+ name = quote_copy_string (current_link_name);
+ if (!name)
+ name = current_link_name;
+ fprintf (msg_file, " link to %s\n", current_link_name);
+ if (name != current_link_name)
+ free (name);
+ break;
+
+ default:
+ fprintf (msg_file, " unknown file type '%c'\n",
+ head->header.linkflag);
+ break;
+
+ case LF_OLDNORMAL:
+ case LF_NORMAL:
+ case LF_SPARSE:
+ case LF_CHR:
+ case LF_BLK:
+ case LF_DIR:
+ case LF_FIFO:
+ case LF_CONTIG:
+ case LF_DUMPDIR:
+ putc ('\n', msg_file);
+ break;
+
+ case LF_VOLHDR:
+ fprintf (msg_file, "--Volume Header--\n");
+ break;
+
+ case LF_MULTIVOL:
+ fprintf (msg_file, "--Continued at byte %ld--\n", from_oct (1 + 12, head->header.offset));
+ break;
+
+ case LF_NAMES:
+ fprintf (msg_file, "--Mangled file names--\n");
+ break;
+ }
+ }
+ fflush (msg_file);
+}
+
+/*
+ * Print a similar line when we make a directory automatically.
+ */
+void
+pr_mkdir (pathname, length, mode)
+ char *pathname;
+ int length;
+ int mode;
+{
+ char modes[11];
+ char *name;
+ extern long baserec;
+
+ if (f_verbose > 1)
+ {
+ /* File type and modes */
+ modes[0] = 'd';
+ demode ((unsigned) mode, modes + 1);
+
+ if (f_sayblock)
+ fprintf (msg_file, "rec %10d: ", baserec + (ar_record - ar_block));
+ /* annofile(msg_file, (char *)NULL); */
+ name = quote_copy_string (pathname);
+ if (!name)
+ name = pathname;
+ fprintf (msg_file, "%s %*s %.*s\n",
+ modes,
+ ugswidth + DATEWIDTH,
+ "Creating directory:",
+ length,
+ pathname);
+ if (name != pathname)
+ free (name);
+ }
+}
+
+
+/*
+ * Skip over <size> bytes of data in records in the archive.
+ */
+void
+skip_file (size)
+ register long size;
+{
+ union record *x;
+ extern long save_totsize;
+ extern long save_sizeleft;
+
+ if (f_multivol)
+ {
+ save_totsize = size;
+ save_sizeleft = size;
+ }
+
+ while (size > 0)
+ {
+ x = findrec ();
+ if (x == NULL)
+ { /* Check it... */
+ msg ("Unexpected EOF on archive file");
+ exit (EX_BADARCH);
+ }
+ userec (x);
+ size -= RECORDSIZE;
+ if (f_multivol)
+ save_sizeleft -= RECORDSIZE;
+ }
+}
+
+void
+skip_extended_headers ()
+{
+ register union record *exhdr;
+
+ for (;;)
+ {
+ exhdr = findrec ();
+ if (!exhdr->ext_hdr.isextended)
+ {
+ userec (exhdr);
+ break;
+ }
+ userec (exhdr);
+ }
+}
+
+/*
+ * Decode the mode string from a stat entry into a 9-char string and a null.
+ */
+void
+demode (mode, string)
+ register unsigned mode;
+ register char *string;
+{
+ register unsigned mask;
+ register char *rwx = "rwxrwxrwx";
+
+ for (mask = 0400; mask != 0; mask >>= 1)
+ {
+ if (mode & mask)
+ *string++ = *rwx++;
+ else
+ {
+ *string++ = '-';
+ rwx++;
+ }
+ }
+
+ if (mode & S_ISUID)
+ if (string[-7] == 'x')
+ string[-7] = 's';
+ else
+ string[-7] = 'S';
+ if (mode & S_ISGID)
+ if (string[-4] == 'x')
+ string[-4] = 's';
+ else
+ string[-4] = 'S';
+ if (mode & S_ISVTX)
+ if (string[-1] == 'x')
+ string[-1] = 't';
+ else
+ string[-1] = 'T';
+ *string = '\0';
+}
generated by cgit v1.2.3 (git 2.25.1) at 2026-02-03 20:59:09 +0000