141 lines
2.4 KiB
C
141 lines
2.4 KiB
C
/*
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** Copyright 1998-2003 University of Illinois Board of Trustees
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** Copyright 1998-2003 Mark D. Roth
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** All rights reserved.
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**
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** decode.c - libtar code to decode tar header blocks
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**
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** Mark D. Roth <roth@uiuc.edu>
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** Campus Information Technologies and Educational Services
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** University of Illinois at Urbana-Champaign
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*/
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#include <libtarint/internal.h>
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#include <stdio.h>
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#if defined(_WIN32) && !defined(__CYGWIN__)
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# include <libtar/compat.h>
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#else
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# ifdef HAVE_SYS_PARAM_H
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# include <sys/param.h>
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# endif
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#endif
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#ifndef WIN32
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#include <pwd.h>
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#include <grp.h>
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#endif
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#ifdef STDC_HEADERS
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# include <string.h>
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#endif
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/* determine full path name */
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/* caller must "free" returned pointer when done with it */
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/* th_get_pathname return values come directly from strdup */
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char *
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th_get_pathname(TAR *t)
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{
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char filename[TAR_MAXPATHLEN];
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if (t->th_buf.gnu_longname)
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return strdup(t->th_buf.gnu_longname);
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if (t->th_buf.prefix[0] != '\0')
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{
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snprintf(filename, sizeof(filename), "%.155s/%.100s",
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t->th_buf.prefix, t->th_buf.name);
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return strdup(filename);
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}
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snprintf(filename, sizeof(filename), "%.100s", t->th_buf.name);
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return strdup(filename);
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}
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uid_t
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th_get_uid(TAR *t)
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{
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int uid;
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#ifndef WIN32
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struct passwd *pw;
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pw = getpwnam(t->th_buf.uname);
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if (pw != NULL)
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return pw->pw_uid;
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/* if the password entry doesn't exist */
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#endif
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sscanf(t->th_buf.uid, "%o", &uid);
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return uid;
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}
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gid_t
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th_get_gid(TAR *t)
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{
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int gid;
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#ifndef WIN32
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struct group *gr;
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gr = getgrnam(t->th_buf.gname);
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if (gr != NULL)
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return gr->gr_gid;
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/* if the group entry doesn't exist */
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#endif
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sscanf(t->th_buf.gid, "%o", &gid);
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return gid;
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}
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mode_t
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th_get_mode(TAR *t)
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{
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mode_t mode;
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mode = (mode_t)oct_to_int(t->th_buf.mode);
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if (! (mode & S_IFMT))
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{
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switch (t->th_buf.typeflag)
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{
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#ifndef WIN32
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case SYMTYPE:
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mode |= S_IFLNK;
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break;
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#endif
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case CHRTYPE:
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mode |= S_IFCHR;
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break;
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case BLKTYPE:
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mode |= S_IFBLK;
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break;
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case DIRTYPE:
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mode |= S_IFDIR;
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break;
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#ifndef WIN32
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case FIFOTYPE:
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mode |= S_IFIFO;
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break;
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#endif
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case AREGTYPE:
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if (t->th_buf.name[strlen(t->th_buf.name) - 1] == '/')
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{
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mode |= S_IFDIR;
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break;
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}
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/* FALLTHROUGH */
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case LNKTYPE:
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case REGTYPE:
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default:
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mode |= S_IFREG;
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}
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}
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return mode;
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}
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