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+/***********************************************************************
+* *
+* This software is part of the ast package *
+* Copyright (c) 1992-2007 AT&T Knowledge Ventures *
+* and is licensed under the *
+* Common Public License, Version 1.0 *
+* by AT&T Knowledge Ventures *
+* *
+* A copy of the License is available at *
+* http://www.opensource.org/licenses/cpl1.0.txt *
+* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
+* *
+* Information and Software Systems Research *
+* AT&T Research *
+* Florham Park NJ *
+* *
+* Glenn Fowler <gsf@research.att.com> *
+* David Korn <dgk@research.att.com> *
+* *
+***********************************************************************/
+#pragma prototyped
+/*
+ * Glenn Fowler
+ * AT&T Research
+ *
+ * sum -- list file checksum and size
+ */
+
+static const char usage[] =
+"[-?\n@(#)$Id: sum (AT&T Research) 2007-02-07 $\n]"
+USAGE_LICENSE
+"[+NAME?cksum,md5sum,sum - print file checksum and block count]"
+"[+DESCRIPTION?\bsum\b lists the checksum, and for most methods the block"
+" count, for each file argument. The standard input is read if there are"
+" no \afile\a arguments. \bgetconf UNIVERSE\b determines the default"
+" \bsum\b method: \batt\b for the \batt\b universe, \bbsd\b otherwise."
+" The default for the other commands is the command name itself. The"
+" \batt\b method is a true sum, all others are order dependent.]"
+"[+?Method names consist of a leading identifier and 0 or more options"
+" separated by -.]"
+"[+?\bgetconf PATH_RESOLVE\b determines how symbolic links are handled. This"
+" can be explicitly overridden by the \b--logical\b, \b--metaphysical\b,"
+" and \b--physical\b options below. \bPATH_RESOLVE\b can be one of:]{"
+" [+logical?Follow all symbolic links.]"
+" [+metaphysical?Follow command argument symbolic links,"
+" otherwise don't follow.]"
+" [+physical?Don't follow symbolic links.]"
+"}"
+
+"[a:all?List the checksum for all files. Use with \b--total\b to list both"
+" individual and total checksums and block counts.]"
+"[b:binary?Read files in binary mode. This is the default.]"
+"[c:check?Each \afile\a is interpreted as the output from a previous \bsum\b."
+" If \b--header\b or \b--permissions\b was specified in the previous"
+" \bsum\b then the checksum method is automatically determined,"
+" otherwise \b--method\b must be specified. The listed checksum is"
+" compared with the current value and a warning is issued for each file"
+" that does not match. If \afile\a was generated by \b--permissions\b"
+" then the file mode, user and group are also checked. Empty lines,"
+" lines starting with \b#<space>\b, or the line \b#\b are ignored. Lines"
+" containing no blanks are interpreted as [no]]\aname\a[=\avalue\a]]"
+" options:]{"
+" [+method=name?Checksum method to apply to subsequent lines.]"
+" [+permissions?Subsequent lines were generated with"
+" \b--permissions\b.]"
+"}"
+"[h:header?Print the checksum method as the first output line. Used with"
+" \b--check\b and \b--permissions\b.]"
+"[l:list?Each \afile\a is interpreted as a list of files, one per line,"
+" that is checksummed.]"
+"[p:permissions?If \b--check\b is not specified then list the file"
+" mode, user and group between the checksum and path. User and group"
+" matching the caller are output as \b-\b. If \b--check\b is"
+" specified then the mode, user and group for each path in \afile\a"
+" are updated if necessary to match those in \afile\a. A warning is"
+" printed on the standard error for each changed file.]"
+"[r:recursive?Recursively checksum the contents of directories.]"
+"[s:silent|status?No output for \b--check\b; 0 exit status means all sums"
+" matched, non-0 means at least one sum failed to match. Ignored for"
+" \b--permissions\b.]"
+"[t:total?List only the total checksum and block count of all files."
+" \b--all\b \b--total\b lists each checksum and the total. The"
+" total checksum and block count may be different from the checksum"
+" and block count of the catenation of all files due to partial"
+" blocks that may occur when the files are treated separately.]"
+"[T:text?Read files in text mode (i.e., treat \b\\r\\n\b as \b\\n\b).]"
+"[w!:warn?Warn about invalid \b--check\b lines.]"
+"[x:method|algorithm?Specifies the checksum \amethod\a to"
+" apply. Parenthesized method options are readonly implementation"
+" details.]:[method]{\fmethods\f}"
+"[L:logical|follow?Follow symbolic links when traversing directories. The"
+" default is determined by \bgetconf PATH_RESOLVE\b.]"
+"[H:metaphysical?Follow command argument symbolic links, otherwise don't"
+" follow symbolic links when traversing directories. The default is"
+" determined by \bgetconf PATH_RESOLVE\b.]"
+"[P:physical?Don't follow symbolic links when traversing directories. The"
+" default is determined by \bgetconf PATH_RESOLVE\b.]"
+
+"\n"
+"\n[ file ... ]\n"
+"\n"
+
+"[+SEE ALSO?\bgetconf\b(1), \btw\b(1), \buuencode\b(1)]"
+;
+
+#include <cmd.h>
+#include <sum.h>
+#include <ls.h>
+#include <fts.h>
+#include <error.h>
+
+typedef struct State_s /* program state */
+{
+ int all; /* list all items */
+ Sfio_t* check; /* check previous output */
+ gid_t gid; /* caller gid */
+ int header; /* list method on output */
+ int list; /* list file name too */
+ Sum_t* oldsum; /* previous sum method */
+ int permissions; /* include mode,uer,group */
+ int haveperm; /* permissions in the input */
+ int recursive; /* recursively descend dirs */
+ unsigned long size; /* combined size of all files */
+ int silent; /* silent check, 0 exit if ok */
+ int (*sort)(FTSENT* const*, FTSENT* const*);
+ Sum_t* sum; /* sum method */
+ int text; /* \r\n == \n */
+ int total; /* list totals only */
+ uid_t uid; /* caller uid */
+ int warn; /* invalid check line warnings */
+} State_t;
+
+static void verify(State_t*, char*, char*, Sfio_t*);
+
+/*
+ * open path for read mode
+ */
+
+static Sfio_t*
+openfile(const char* path, const char* mode)
+{
+ Sfio_t* sp;
+
+ if (!path || streq(path, "-") || streq(path, "/dev/stdin") || streq(path, "/dev/fd/0"))
+ {
+ sp = sfstdin;
+ sfopen(sp, NiL, mode);
+ }
+ else if (!(sp = sfopen(NiL, path, mode)))
+ error(ERROR_SYSTEM|2, "%s: cannot read", path);
+ return sp;
+}
+
+/*
+ * close an openfile() stream
+ */
+
+static int
+closefile(Sfio_t* sp)
+{
+ return sp == sfstdin ? 0 : sfclose(sp);
+}
+
+/*
+ * compute and print sum on an open file
+ */
+
+static void
+pr(State_t* state, Sfio_t* op, Sfio_t* ip, char* file, int perm, struct stat* st, Sfio_t* check)
+{
+ register char* p;
+ register char* r;
+ register char* e;
+ register int peek;
+ struct stat ss;
+
+ if (check)
+ {
+ state->oldsum = state->sum;
+ while (p = sfgetr(ip, '\n', 1))
+ verify(state, p, file, check);
+ state->sum = state->oldsum;
+ if (state->warn && !sfeof(ip))
+ error(2, "%s: last line incomplete", file);
+ return;
+ }
+ suminit(state->sum);
+ if (state->text)
+ {
+ peek = 0;
+ while (p = sfreserve(ip, SF_UNBOUND, 0))
+ {
+ e = p + sfvalue(ip);
+ if (peek)
+ {
+ peek = 0;
+ if (*p != '\n')
+ sumblock(state->sum, "\r", 1);
+ }
+ while (r = memchr(p, '\r', e - p))
+ {
+ if (++r >= e)
+ {
+ e--;
+ peek = 1;
+ break;
+ }
+ sumblock(state->sum, p, r - p - (*r == '\n'));
+ p = r;
+ }
+ sumblock(state->sum, p, e - p);
+ }
+ if (peek)
+ sumblock(state->sum, "\r", 1);
+ }
+ else
+ while (p = sfreserve(ip, SF_UNBOUND, 0))
+ sumblock(state->sum, p, sfvalue(ip));
+ if (sfvalue(ip))
+ error(ERROR_SYSTEM|2, "%s: read error", file);
+ sumdone(state->sum);
+ if (!state->total || state->all)
+ {
+ sumprint(state->sum, op, SUM_SIZE|SUM_SCALE);
+ if (perm >= 0)
+ {
+ if (perm)
+ {
+ if (!st && fstat(sffileno(ip), st = &ss))
+ error(ERROR_SYSTEM|2, "%s: cannot stat", file);
+ else
+ sfprintf(sfstdout, " %04o %s %s",
+ modex(st->st_mode & S_IPERM),
+ (st->st_uid != state->uid && ((st->st_mode & S_ISUID) || (st->st_mode & S_IRUSR) && !(st->st_mode & (S_IRGRP|S_IROTH)) || (st->st_mode & S_IXUSR) && !(st->st_mode & (S_IXGRP|S_IXOTH)))) ? fmtuid(st->st_uid) : "-",
+ (st->st_gid != state->gid && ((st->st_mode & S_ISGID) || (st->st_mode & S_IRGRP) && !(st->st_mode & S_IROTH) || (st->st_mode & S_IXGRP) && !(st->st_mode & S_IXOTH))) ? fmtgid(st->st_gid) : "-");
+ }
+ if (ip != sfstdin)
+ sfprintf(op, " %s", file);
+ sfputc(op, '\n');
+ }
+ }
+}
+
+/*
+ * verify previous sum output
+ */
+
+static void
+verify(State_t* state, register char* s, char* check, Sfio_t* rp)
+{
+ register char* t;
+ char* e;
+ char* file;
+ int attr;
+ int mode;
+ int uid;
+ int gid;
+ Sfio_t* sp;
+ struct stat st;
+
+ if (!*s || *s == '#' && (!*(s + 1) || *(s + 1) == ' ' || *(s + 1) == '\t'))
+ return;
+ if (t = strchr(s, ' '))
+ {
+ if ((t - s) > 10 || !(file = strchr(t + 1, ' ')))
+ file = t;
+ *file++ = 0;
+ attr = 0;
+ if ((mode = strtol(file, &e, 8)) && *e == ' ' && (e - file) == 4)
+ {
+ mode = modei(mode);
+ if (t = strchr(++e, ' '))
+ {
+ if (*e == '-' && (t - e) == 1)
+ uid = -1;
+ else
+ {
+ *t = 0;
+ uid = struid(e);
+ *t = ' ';
+ }
+ if (e = strchr(++t, ' '))
+ {
+ if (*t == '-' && (e - t) == 1)
+ gid = -1;
+ else
+ {
+ *e = 0;
+ gid = struid(t);
+ *e = ' ';
+ }
+ file = e + 1;
+ attr = 1;
+ }
+ }
+ }
+ if (sp = openfile(file, "rb"))
+ {
+ pr(state, rp, sp, file, -1, NiL, NiL);
+ if (!(t = sfstruse(rp)))
+ error(ERROR_SYSTEM|3, "out of space");
+ if (!streq(s, t))
+ {
+ if (state->silent)
+ error_info.errors++;
+ else
+ error(2, "%s: checksum changed", file);
+ }
+ else if (attr)
+ {
+ if (fstat(sffileno(sp), &st))
+ {
+ if (state->silent)
+ error_info.errors++;
+ else
+ error(ERROR_SYSTEM|2, "%s: cannot stat", file);
+ }
+ else
+ {
+ if (uid < 0 || uid == st.st_uid)
+ uid = -1;
+ else if (!state->permissions)
+ {
+ if (state->silent)
+ error_info.errors++;
+ else
+ error(2, "%s: uid should be %s", file, fmtuid(uid));
+ }
+ if (gid < 0 || gid == st.st_gid)
+ gid = -1;
+ else if (!state->permissions)
+ {
+ if (state->silent)
+ error_info.errors++;
+ else
+ error(2, "%s: gid should be %s", file, fmtgid(gid));
+ }
+ if (state->permissions && (uid >= 0 || gid >= 0))
+ {
+ if (chown(file, uid, gid) < 0)
+ {
+ if (uid < 0)
+ error(ERROR_SYSTEM|2, "%s: cannot change group to %s", file, fmtgid(gid));
+ else if (gid < 0)
+ error(ERROR_SYSTEM|2, "%s: cannot change user to %s", file, fmtuid(uid));
+ else
+ error(ERROR_SYSTEM|2, "%s: cannot change user to %s and group to %s", file, fmtuid(uid), fmtgid(gid));
+ }
+ else
+ {
+ if (uid < 0)
+ error(1, "%s: changed group to %s", file, fmtgid(gid));
+ else if (gid < 0)
+ error(1, "%s: changed user to %s", file, fmtuid(uid));
+ else
+ error(1, "%s: changed user to %s and group to %s", file, fmtuid(uid), fmtgid(gid));
+ }
+ }
+ if ((st.st_mode & S_IPERM) ^ mode)
+ {
+ if (state->permissions)
+ {
+ if (chmod(file, mode) < 0)
+ error(ERROR_SYSTEM|2, "%s: cannot change mode to %s", file, fmtmode(mode, 0));
+ else
+ error(ERROR_SYSTEM|1, "%s: changed mode to %s", file, fmtmode(mode, 0));
+ }
+ else if (state->silent)
+ error_info.errors++;
+ else
+ error(2, "%s: mode should be %s", file, fmtmode(mode, 0));
+ }
+ }
+ }
+ closefile(sp);
+ }
+ }
+ else if (strneq(s, "method=", 7))
+ {
+ s += 7;
+ if (state->sum != state->oldsum)
+ sumclose(state->sum);
+ if (!(state->sum = sumopen(s)))
+ error(3, "%s: %s: unknown checksum method", check, s);
+ }
+ else if (streq(s, "permissions"))
+ state->haveperm = 1;
+ else
+ error(1, "%s: %s: unknown option", check, s);
+}
+
+/*
+ * sum the list of files in lp
+ */
+
+static void
+list(State_t* state, register Sfio_t* lp)
+{
+ register char* file;
+ register Sfio_t* sp;
+
+ while (file = sfgetr(lp, '\n', 1))
+ if (sp = openfile(file, state->check ? "rt" : "rb"))
+ {
+ pr(state, sfstdout, sp, file, state->permissions, NiL, state->check);
+ closefile(sp);
+ }
+}
+
+/*
+ * order child entries
+ */
+
+static int
+order(FTSENT* const* f1, FTSENT* const* f2)
+{
+ return strcoll((*f1)->fts_name, (*f2)->fts_name);
+}
+
+/*
+ * optget() info discipline function
+ */
+
+static int
+optinfo(Opt_t* op, Sfio_t* sp, const char* s, Optdisc_t* dp)
+{
+ if (streq(s, "methods"))
+ return sumusage(sp);
+ return 0;
+}
+
+int
+b_cksum(int argc, register char** argv, void* context)
+{
+ register int flags;
+ register char* s;
+ char* file;
+ Sfio_t* sp;
+ FTS* fts;
+ FTSENT* ent;
+ Optdisc_t optdisc;
+ State_t state;
+
+ cmdinit(argc, argv, context, ERROR_CATALOG, ERROR_NOTIFY);
+ memset(&state, 0, sizeof(state));
+ setlocale(LC_ALL, "");
+ flags = fts_flags() | FTS_TOP | FTS_NOPOSTORDER | FTS_NOSEEDOTDIR;
+ state.warn = 1;
+ optinit(&optdisc, optinfo);
+ for (;;)
+ {
+ switch (optget(argv, usage))
+ {
+ case 'a':
+ state.all = 1;
+ continue;
+ case 'b':
+ state.text = 0;
+ continue;
+ case 'c':
+ if (!(state.check = sfstropen()))
+ error(3, "out of space [check]");
+ continue;
+ case 'h':
+ state.header = 1;
+ continue;
+ case 'l':
+ state.list = 1;
+ continue;
+ case 'p':
+ state.permissions = 1;
+ continue;
+ case 'r':
+ flags &= ~FTS_TOP;
+ state.recursive = 1;
+ state.sort = order;
+ continue;
+ case 's':
+ state.silent = opt_info.num;
+ continue;
+ case 't':
+ state.total = 1;
+ continue;
+ case 'w':
+ state.warn = opt_info.num;
+ continue;
+ case 'x':
+ if (!(state.sum = sumopen(opt_info.arg)))
+ error(3, "%s: unknown checksum method", opt_info.arg);
+ continue;
+ case 'H':
+ flags |= FTS_META|FTS_PHYSICAL;
+ continue;
+ case 'L':
+ flags &= ~(FTS_META|FTS_PHYSICAL);
+ continue;
+ case 'P':
+ flags &= ~FTS_META;
+ flags |= FTS_PHYSICAL;
+ continue;
+ case 'T':
+ state.text = 1;
+ continue;
+ case '?':
+ error(ERROR_USAGE|4, "%s", opt_info.arg);
+ break;
+ case ':':
+ error(2, "%s", opt_info.arg);
+ break;
+ }
+ break;
+ }
+ argv += opt_info.index;
+ if (error_info.errors)
+ error(ERROR_USAGE|4, "%s", optusage(NiL));
+
+ /*
+ * check the method
+ */
+
+ if (!state.sum && !(state.sum = sumopen(error_info.id)) && !(state.sum = sumopen(astconf("UNIVERSE", NiL, NiL))))
+ state.sum = sumopen(NiL);
+
+ /*
+ * do it
+ */
+
+ if (state.permissions)
+ {
+ state.uid = geteuid();
+ state.gid = getegid();
+ state.silent = 0;
+ }
+ if (!state.check && (state.header || state.permissions))
+ {
+ sfprintf(sfstdout, "method=%s\n", state.sum->name);
+ if (state.permissions)
+ sfprintf(sfstdout, "permissions\n");
+ }
+ if (state.list)
+ {
+ if (*argv)
+ {
+ while (file = *argv++)
+ if (sp = openfile(file, "rt"))
+ {
+ list(&state, sp);
+ closefile(sp);
+ }
+ }
+ else if (sp = openfile(NiL, "rt"))
+ {
+ list(&state, sp);
+ closefile(sp);
+ }
+ }
+ else if (!*argv && !state.recursive)
+ pr(&state, sfstdout, sfstdin, "/dev/stdin", state.permissions, NiL, state.check);
+ else if (!(fts = fts_open(argv, flags, state.sort)))
+ error(ERROR_system(1), "%s: not found", *argv);
+ else
+ {
+ while (!cmdquit() && (ent = fts_read(fts)))
+ switch (ent->fts_info)
+ {
+ case FTS_SL:
+ if (!(flags & FTS_PHYSICAL) || (flags & FTS_META) && ent->fts_level == 1)
+ fts_set(NiL, ent, FTS_FOLLOW);
+ break;
+ case FTS_F:
+ if (sp = openfile(ent->fts_accpath, "rb"))
+ {
+ pr(&state, sfstdout, sp, ent->fts_path, state.permissions, ent->fts_statp, state.check);
+ closefile(sp);
+ }
+ break;
+ case FTS_DC:
+ error(ERROR_warn(0), "%s: directory causes cycle", ent->fts_accpath);
+ break;
+ case FTS_DNR:
+ error(ERROR_system(0), "%s: cannot read directory", ent->fts_accpath);
+ break;
+ case FTS_DNX:
+ error(ERROR_system(0), "%s: cannot search directory", ent->fts_accpath);
+ break;
+ case FTS_NS:
+ error(ERROR_system(0), "%s: not found", ent->fts_accpath);
+ break;
+ }
+ fts_close(fts);
+ }
+ if (state.total)
+ {
+ sumprint(state.sum, sfstdout, SUM_TOTAL|SUM_SIZE|SUM_SCALE);
+ sfputc(sfstdout, '\n');
+ }
+ sumclose(state.sum);
+ return error_info.errors != 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-06-01 03:33:18 +0000