1 files changed, 102 insertions, 0 deletions
diff --git a/lib/compat.c b/lib/compat.c
new file mode 100644
index 000000000..94ae40341
--- /dev/null
+++ b/lib/compat.c
@@ -0,0 +1,102 @@
+/*
+ * libdpkg - Debian packaging suite library routines
+ * compat.c - compatibility functions
+ *
+ * Copyright (C) 1995 Ian Jackson <iwj10@cus.cam.ac.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 2,
+ * 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 dpkg; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dirent.h>
+
+#include "config.h"
+
+#ifndef HAVE_STRERROR
+extern const char *const sys_errlist[];
+extern const int sys_nerr;
+const char *strerror(int e) {
+  static char buf[100];
+  if (e >= 0 && e < sys_nerr) return sys_errlist[e];
+  sprintf(buf, "System error no.%d", e);
+  return buf;
+}
+#endif
+
+#ifndef HAVE_STRSIGNAL
+extern const char *const sys_siglist[];
+const char *strsignal(int e) {
+  static char buf[100];
+  if (e >= 0 && e < NSIG) return sys_siglist[e];
+  sprintf(buf, "Signal no.%d", e);
+  return buf;
+}
+#endif
+
+#ifndef HAVE_SCANDIR
+
+static int (*scandir_comparfn)(const void*, const void*);
+static int scandir_compar(const void *a, const void *b) {
+  return scandir_comparfn(*(const struct dirent**)a,*(const struct dirent**)b);
+}
+      
+int scandir(const char *dir, struct dirent ***namelist,
+            int (*select)(const struct dirent *),
+            int (*compar)(const void*, const void*)) {
+  DIR *d;
+  int used, avail;
+  struct dirent *e, *m;
+  d= opendir(dir);  if (!d) return -1;
+  used=0; avail=20;
+  *namelist= malloc(avail*sizeof(struct dirent*));
+  if (!*namelist) return -1;
+  while ((e= readdir(d)) != 0) {
+    if (!select(e)) continue;
+    m= malloc(sizeof(struct dirent) + strlen(e->d_name));
+    if (!m) return -1;
+    *m= *e;
+    strcpy(m->d_name,e->d_name);
+    if (used >= avail-1) {
+      avail+= avail;
+      *namelist= realloc(*namelist, avail*sizeof(struct dirent*));
+      if (!*namelist) return -1;
+    }
+    (*namelist)[used]= m;
+    used++;
+  }
+  (*namelist)[used]= 0;
+  scandir_comparfn= compar;
+  qsort(*namelist, used, sizeof(struct dirent*), scandir_compar);
+  return used;
+}
+#endif
+
+#ifndef HAVE_ALPHASORT
+int alphasort(const struct dirent *a, const struct dirent *b) {
+  return strcmp(a->d_name,b->d_name);
+}
+#endif
+
+#ifndef HAVE_UNSETENV
+void unsetenv(const char *p) {
+  char *q;
+  q= malloc(strlen(p)+3); if (!q) return;
+  strcpy(q,p); strcat(q,"="); putenv(q);
+}
+#endif