/*
+ * summer - program for summarising (with md5 checksums) filesystem trees
+ *
* usage:
* cat startpoints.list | summer >data.list
* summer startpoints... >data.list
* prints md5sum of data-list to stderr
*/
+/*
+ * Copyright (C) 2003,2006-2007 Ian Jackson <ian@davenant.greenend.org.uk>
+ *
+ * This 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 3,
+ * or (at your option) any later version.
+ *
+ * This 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 this file; if not, consult the Free Software
+ * Foundation's website at www.fsf.org, or the GNU Project website at
+ * www.gnu.org.
+ */
#define _GNU_SOURCE
-#include <ftw.h>
+#include <search.h>
+#include <dirent.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#define MAXDEPTH 1024
#define CSUMXL 32
-static int quiet=0, hidectime=0, filenamefieldsep=' ';
+static int quiet=0, hidectime=0, hideatime=0, hidemtime=0;
+static int hidedirsize=0, hidelinkmtime=0, hidextime=0, onefilesystem=0;
+static int filenamefieldsep=' ';
static FILE *errfile;
+#define nodeflag_fsvalid 1u
+
+static void malloc_fail(void) { perror("summer: alloc failed"); exit(12); }
+
+static void *mmalloc(size_t sz) {
+ void *r;
+ r= malloc(sz); if (!r) malloc_fail();
+ return r;
+}
+
+static void *mrealloc(void *p, size_t sz) {
+ void *r;
+ r= realloc(p, sz); if (!r && sz) malloc_fail();
+ return r;
+}
+
static void fn_escaped(FILE *f, const char *fn) {
int c;
while ((c= *fn++)) {
printf("%-*s", CSUMXL, s);
}
-struct FTW;
+static void linktargpath(const char *linktarg) {
+ printf(" -> ");
+ fn_escaped(stdout, linktarg);
+}
-static int item(const char *path, const struct stat *stab,
- int flag, struct FTW *ftws) {
- char linktarg[MAXFN+1];
+static void pu10(void) { printf(" %10s", "?"); }
+
+#define PTIME(stab, memb) ((stab) ? ptime((stab), (stab)->memb) : pu10())
+
+static void ptime(const struct stat *stab, unsigned long val) {
+ const char *instead;
+
+ if (!hidextime) goto justprint;
+ else if (S_ISCHR(stab->st_mode)) instead= "char";
+ else if (S_ISBLK(stab->st_mode)) instead= "block";
+ else if (S_ISLNK(stab->st_mode)) instead= "link";
+ else if (S_ISSOCK(stab->st_mode)) instead= "sock";
+ else if (S_ISFIFO(stab->st_mode)) instead= "pipe";
+ else {
+ justprint:
+ printf(" %10lu", val);
+ return;
+ }
+
+ printf(" %10s",instead);
+}
- switch (flag) {
- case FTW_D:
- case FTW_F:
- case FTW_SL:
- if (S_ISREG(stab->st_mode)) csum_file(path);
- else if (S_ISDIR(stab->st_mode)) csum_str("dir");
- else if (S_ISCHR(stab->st_mode)) csum_dev('c',stab);
- else if (S_ISBLK(stab->st_mode)) csum_dev('b',stab);
- else if (S_ISFIFO(stab->st_mode)) csum_str("pipe");
- else if (S_ISLNK(stab->st_mode)) csum_str("link");
- else if (S_ISSOCK(stab->st_mode)) csum_str("sock");
- else problem(path,CSUMXL,"badobj: 0x%lx", (unsigned long)stab->st_mode);
- break;
-
- case FTW_NS:
- case FTW_DNR:
- problem_e(path,CSUMXL,"inaccessible");
- break;
-
- default:
- problem(path,CSUMXL,"ftw flag 0x%x: %s",flag);
+struct hardlink {
+ dev_t dev;
+ ino_t ino;
+ char path[1];
+};
+static void *hardlinks;
+
+static int hardlink_compar(const void *av, const void *bv) {
+ const struct hardlink *a=av, *b=bv;
+ if (a->ino != b->ino) return b->ino - a->ino;
+ return b->dev - a->dev;
+}
+
+static void recurse(const char *path, unsigned nodeflags, dev_t fs);
+
+static void node(const char *path, unsigned nodeflags, dev_t fs) {
+ char linktarg[MAXFN+1];
+ struct hardlink *foundhl;
+ const struct stat *stab;
+ struct stat stabuf;
+ int r, mountpoint=0;
+
+ r= lstat(path, &stabuf);
+ stab= r ? 0 : &stabuf;
+
+ foundhl= 0;
+ if (stab && stab->st_nlink>1) {
+ struct hardlink *newhl, **foundhl_node;
+ newhl= mmalloc(sizeof(*newhl) + strlen(path));
+ newhl->dev= stab->st_dev;
+ newhl->ino= stab->st_ino;
+ foundhl_node= tsearch(newhl, &hardlinks, hardlink_compar);
+ if (!foundhl_node) malloc_fail();
+ foundhl= *foundhl_node;
+ if (foundhl!=newhl) {
+ free(newhl); /* hardlink to an earlier object */
+ } else {
+ foundhl= 0; /* new object with link count>1 */
+ strcpy(newhl->path, path);
+ }
}
- if (S_ISLNK(stab->st_mode)) {
- int r;
+ if (stab) {
+ if ((nodeflags & nodeflag_fsvalid) && stab->st_dev != fs)
+ mountpoint= 1;
+ fs= stab->st_dev;
+ nodeflags |= nodeflag_fsvalid;
+ }
+ if (!stab) problem_e(path,CSUMXL,"inaccessible");
+ else if (foundhl) csum_str("hardlink");
+ else if (S_ISREG(stab->st_mode)) csum_file(path);
+ else if (S_ISCHR(stab->st_mode)) csum_dev('c',stab);
+ else if (S_ISBLK(stab->st_mode)) csum_dev('b',stab);
+ else if (S_ISFIFO(stab->st_mode)) csum_str("pipe");
+ else if (S_ISLNK(stab->st_mode)) csum_str("symlink");
+ else if (S_ISSOCK(stab->st_mode)) csum_str("sock");
+ else if (S_ISDIR(stab->st_mode)) csum_str(mountpoint ? "mountpoint" : "dir");
+ else problem(path,CSUMXL,"badobj: 0x%lx", (unsigned long)stab->st_mode);
+
+ if (stab && S_ISLNK(stab->st_mode)) {
r= readlink(path, linktarg, sizeof(linktarg)-1);
if (r==sizeof(linktarg)) { problem(path,-1,"readlink too big"); r=-1; }
else if (r<0) { problem_e(path,-1,"readlink"); }
else linktarg[r]= 0;
}
- printf(" %10lu %4d %4o %10ld %10ld %10lu %10lu",
- (unsigned long)stab->st_size,
- (int)stab->st_nlink,
- (unsigned)stab->st_mode & 07777U,
- (unsigned long)stab->st_uid,
- (unsigned long)stab->st_gid,
- (unsigned long)stab->st_atime,
- (unsigned long)stab->st_mtime);
+ if (stab) {
+ if (S_ISDIR(stab->st_mode) && hidedirsize)
+ printf(" %10s","dir");
+ else
+ printf(" %10lu",
+ (unsigned long)stab->st_size);
+
+ printf(" %4o %10ld %10ld",
+ (unsigned)stab->st_mode & 07777U,
+ (unsigned long)stab->st_uid,
+ (unsigned long)stab->st_gid);
+ } else {
+ printf(" %10s %4s %10s %10s", "?","?","?","?");
+ }
+
+ if (!hideatime)
+ PTIME(stab, st_atime);
+
+ if (!hidemtime) {
+ if (stab && S_ISLNK(stab->st_mode) && hidelinkmtime)
+ printf(" %10s","link");
+ else
+ PTIME(stab, st_mtime);
+ }
+
if (!hidectime)
- printf(" %10lu",
- (unsigned long)stab->st_ctime);
+ PTIME(stab, st_ctime);
+
putchar(filenamefieldsep);
fn_escaped(stdout, path);
- if (S_ISLNK(stab->st_mode)) {
- printf(" -> ");
- fn_escaped(stdout, linktarg);
- }
+ if (foundhl) linktargpath(foundhl->path);
+ if (stab && S_ISLNK(stab->st_mode)) linktargpath(linktarg);
+
putchar('\n');
if (ferror(stdout)) { perror("summer: stdout"); exit(12); }
- return 0;
+
+ if (stab && S_ISDIR(stab->st_mode) && !(mountpoint && onefilesystem))
+ recurse(path, nodeflags, fs);
}
static void process(const char *startpoint) {
- int r;
if (!quiet)
fprintf(stderr,"summer: processing: %s\n",startpoint);
- r= nftw(startpoint, item, MAXDEPTH, FTW_MOUNT|FTW_PHYS);
- if (r) { fprintf(stderr, "summer: nftw failed: %s: %s\n",
- strerror(errno), startpoint); exit(4); }
+ node(startpoint, 0,0);
+ tdestroy(hardlinks,free);
+ hardlinks= 0;
+}
+
+static int recurse_maxlen;
+
+static int recurse_filter(const struct dirent *de) {
+ int l;
+ if (de->d_name[0]=='.' &&
+ (de->d_name[1]==0 ||
+ (de->d_name[1]=='.' &&
+ de->d_name[2]==0)))
+ return 0;
+ l= strlen(de->d_name);
+ if (l > recurse_maxlen) recurse_maxlen= l;
+ return 1;
+}
+
+static int recurse_compar(const struct dirent **a, const struct dirent **b) {
+ return strcmp((*a)->d_name, (*b)->d_name);
+}
+
+static void recurse(const char *path_or_buf, unsigned nodeflags, dev_t fs) {
+ static char *buf;
+ static int buf_allocd;
+
+ struct dirent **namelist, *const *de;
+ const char *path_or_0= path_or_buf==buf ? 0 : path_or_buf;
+ int nentries, pathl, esave, buf_want, i;
+
+ pathl= strlen(path_or_buf);
+ recurse_maxlen= 2;
+ nentries= scandir(path_or_buf, &namelist, recurse_filter, recurse_compar);
+ esave= errno;
+
+ buf_want= pathl+1+recurse_maxlen+1;
+ if (buf_want > buf_allocd) {
+ buf= mrealloc(buf, buf_want);
+ buf_allocd= buf_want;
+ }
+ /* NOTE that path_or_buf is invalid after this point because
+ * it might have been realloc'd ! */
+ if (path_or_0) strcpy(buf,path_or_0);
+
+ buf[pathl]= '/';
+ pathl++;
+ if (nentries < 0) {
+ buf[pathl]= 0; errno= esave;
+ problem_e(buf,CSUMXL+72,"scandir failed");
+ fn_escaped(stdout,buf); putchar('\n');
+ return;
+ }
+ for (i=0, de=namelist; i<nentries; i++, de++) {
+ strcpy(buf+pathl, (*de)->d_name);
+ node(buf, nodeflags, fs);
+ free(*de);
+ }
+ free(namelist);
}
static void from_stdin(void) {
errfile= stderr;
- if ((arg=argv[1]) && *arg++=='-') {
+ while ((arg=argv[1]) && *arg++=='-') {
while ((c=*arg++)) {
switch (c) {
case 'h':
case 't':
filenamefieldsep= '\t';
break;
+ case 'D':
+ hidedirsize= 1;
+ break;
+ case 'b':
+ hidelinkmtime= 1;
+ break;
+ case 'B':
+ hidextime= 1;
+ break;
+ case 'x':
+ onefilesystem= 1;
+ break;
case 'C':
hidectime= 1;
break;
+ case 'A':
+ hideatime= 1;
+ break;
+ case 'M':
+ hidemtime= 1;
+ break;
case 'f':
errfile= stdout;
break;
~ian / chiark-utils.git / blobdiff