use utimes instead of utimensat/futimens

[apt.git] / methods / rred.cc

diff --git a/methods/rred.cc b/methods/rred.cc
index 3131661606c2b548e1fa99996f528a4e6054fe31..fe7ef7322a40d0c08397f8501fc85e347c85889a 100644 (file)
--- a/methods/rred.cc
+++ b/methods/rred.cc
@@ -20,12 +20,13 @@
 #include <vector>
 #include <iterator>
 
+#include <fcntl.h>
 #include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
-#include <utime.h>
+#include <sys/time.h>
 
 #include <apti18n.h>
 
@@ -37,11 +38,9 @@ class MemBlock {
    char *free;
    struct MemBlock *next;
 
-   MemBlock(size_t size)
+   MemBlock(size_t size) : size(size), next(NULL)
    {
       free = start = new char[size];
-      size = size;
-      next = NULL;
    }
 
    size_t avail(void) { return size - (free - start); }
@@ -157,7 +156,7 @@ class FileChanges {
 #ifdef POSDEBUG
       size_t cpos = 0;
       std::list<struct Change>::iterator x;
-      for (x = changes.begin(); x != where; x++) {
+      for (x = changes.begin(); x != where; ++x) {
         assert(x != changes.end());
         cpos += x->offset + x->add_cnt;
       }
@@ -208,7 +207,7 @@ class FileChanges {
         left();
       }
       std::list<struct Change>::iterator next = where;
-      next++;
+      ++next;
 
       while (next != changes.end() && next->offset == 0) {
         where->del_cnt += next->del_cnt;
@@ -221,7 +220,7 @@ class FileChanges {
            where->add_cnt = next->add_cnt;
            next = changes.erase(next);
         } else {
-           next++;
+           ++next;
         }
       }
    }
@@ -261,7 +260,7 @@ class FileChanges {
       if (where != changes.end())
         where->offset -= offset;
       changes.insert(where, Change(offset));
-      where--;
+      --where;
       assert(pos_is_okay());
    }
 
@@ -284,24 +283,8 @@ class FileChanges {
       before.add_len -= where->add_len;
 
       changes.insert(where, before);
-      where--;
-      assert(pos_is_okay());
-   }
-
-   size_t check_next_offset(size_t max)
-   {
+      --where;
       assert(pos_is_okay());
-      if (max > 0)
-      {
-        where++;
-        if (where != changes.end()) {
-           if (where->offset < max)
-              max = where->offset;
-        }
-        where--;
-        assert(pos_is_okay());
-      }
-      return max;
    }
 
    void delete_lines(size_t cnt)
@@ -317,7 +300,7 @@ class FileChanges {
         x->skip_lines(del);
         cnt -= del;
 
-        x++;
+        ++x;
         if (x == changes.end()) {
            del = cnt;
         } else {
@@ -334,7 +317,7 @@ class FileChanges {
 
    void left(void) {
       assert(pos_is_okay());
-      where--;
+      --where;
       pos -= where->offset + where->add_cnt;
       assert(pos_is_okay());
    }
@@ -342,7 +325,7 @@ class FileChanges {
    void right(void) {
       assert(pos_is_okay());
       pos += where->offset + where->add_cnt;
-      where++;
+      ++where;
       assert(pos_is_okay());
    }
 };
@@ -351,58 +334,57 @@ class Patch {
    FileChanges filechanges;
    MemBlock add_text;
 
+   static bool retry_fwrite(char *b, size_t l, FILE *f, Hashes *hash)
+   {
+      size_t r = 1;
+      while (r > 0 && l > 0)
+      {
+         r = fwrite(b, 1, l, f);
+        if (hash)
+           hash->Add((unsigned char*)b, r);
+        l -= r;
+        b += r;
+      }
+      return l == 0;
+   }
+
    static void dump_rest(FILE *o, FILE *i, Hashes *hash)
    {
       char buffer[BLOCK_SIZE];
       size_t l;
       while (0 < (l = fread(buffer, 1, sizeof(buffer), i))) {
-        fwrite(buffer, 1, l, o);
-        if (hash)
-           hash->Add((unsigned char*)buffer, l);
+        if (!retry_fwrite(buffer, l, o, hash))
+           break;
       }
    }
 
    static void dump_lines(FILE *o, FILE *i, size_t n, Hashes *hash)
    {
       char buffer[BLOCK_SIZE];
-      size_t l;
       while (n > 0) {
         if (fgets(buffer, sizeof(buffer), i) == 0)
            buffer[0] = '\0';
-        l = strlen(buffer);
+        size_t const l = strlen(buffer);
         if (l == 0 || buffer[l-1] == '\n')
            n--;
-        fwrite(buffer, 1, l, o);
-
-        if (hash)
-           hash->Add((unsigned char*)buffer, l);
+        retry_fwrite(buffer, l, o, hash);
       }
    }
 
    static void skip_lines(FILE *i, int n)
    {
       char buffer[BLOCK_SIZE];
-      size_t l;
       while (n > 0) {
         if (fgets(buffer, sizeof(buffer), i) == 0)
            buffer[0] = '\0';
-        l = strlen(buffer);
+        size_t const l = strlen(buffer);
         if (l == 0 || buffer[l-1] == '\n')
            n--;
       }
    }
 
-   static bool dump_mem(FILE *o, char *p, size_t s, Hashes *hash) {
-      size_t r;
-      while (s > 0) {
-        r = fwrite(p, 1, s, o);
-        if (hash)
-           hash->Add((unsigned char*)p, s);
-        s -= r;
-        p += r;
-        if (r == 0) return false;
-      }
-      return true;
+   static void dump_mem(FILE *o, char *p, size_t s, Hashes *hash) {
+      retry_fwrite(p, s, o, hash);
    }
 
    public:
@@ -455,7 +437,7 @@ class Patch {
                  filechanges.add_change(ch);
                  break;
            }
-        } else { /* !cmdwaanted */
+        } else { /* !cmdwanted */
            if (buffer[0] == '.' && buffer[1] == '\n') {
               cmdwanted = true;
               filechanges.add_change(ch);
@@ -489,14 +471,14 @@ class Patch {
    {
       size_t line = 0;
       std::list<struct Change>::reverse_iterator ch;
-      for (ch = filechanges.rbegin(); ch != filechanges.rend(); ch++) {
+      for (ch = filechanges.rbegin(); ch != filechanges.rend(); ++ch) {
         line += ch->offset + ch->del_cnt;
       }
 
-      for (ch = filechanges.rbegin(); ch != filechanges.rend(); ch++) {
+      for (ch = filechanges.rbegin(); ch != filechanges.rend(); ++ch) {
         std::list<struct Change>::reverse_iterator mg_i, mg_e = ch;
         while (ch->del_cnt == 0 && ch->offset == 0)
-           ch++;
+           ++ch;
         line -= ch->del_cnt;
         if (ch->add_cnt > 0) {
            if (ch->del_cnt == 0) {
@@ -525,7 +507,7 @@ class Patch {
    void apply_against_file(FILE *out, FILE *in, Hashes *hash = NULL)
    {
       std::list<struct Change>::iterator ch;
-      for (ch = filechanges.begin(); ch != filechanges.end(); ch++) {
+      for (ch = filechanges.begin(); ch != filechanges.end(); ++ch) {
         dump_lines(out, in, ch->offset, hash);
         skip_lines(in, ch->del_cnt);
         dump_mem(out, ch->add, ch->add_len, hash);
@@ -574,7 +556,7 @@ class RredMethod : public pkgAcqMethod {
         std::string patch_name;
         for (std::vector<std::string>::iterator I = patchpaths.begin();
               I != patchpaths.end();
-              I++)
+              ++I)
         {
            patch_name = *I;
            if (Debug == true)
@@ -616,11 +598,12 @@ class RredMethod : public pkgAcqMethod {
               stat(patch_name.c_str(), &bufpatch) != 0)
            return _error->Errno("stat", _("Failed to stat"));
 
-        struct utimbuf timebuf;
-        timebuf.actime = bufbase.st_atime;
-        timebuf.modtime = bufpatch.st_mtime;
-        if (utime(Itm->DestFile.c_str(), &timebuf) != 0)
-           return _error->Errno("utime", _("Failed to set modification time"));
+        struct timeval times[2];
+        times[0].tv_sec = bufbase.st_atime;
+        times[1].tv_sec = bufpatch.st_mtime;
+        times[0].tv_usec = times[1].tv_usec = 0;
+        if (utimes(Itm->DestFile.c_str(), times) != 0)
+           return _error->Errno("utimes",_("Failed to set modification time"));
 
         if (stat(Itm->DestFile.c_str(), &bufbase) != 0)
            return _error->Errno("stat", _("Failed to stat"));
@@ -634,7 +617,7 @@ class RredMethod : public pkgAcqMethod {
       }
 
    public:
-      RredMethod() : pkgAcqMethod("2.0",SingleInstance | SendConfig) {}
+      RredMethod() : pkgAcqMethod("2.0",SingleInstance | SendConfig), Debug(false) {}
 };
 
 int main(int argc, char **argv)