Merge tag 'debian/1.8.5p2-1' into squeeze

[debian/sudo] / compat / pw_dup.c

diff --git a/compat/pw_dup.c b/compat/pw_dup.c
new file mode 100644 (file)
index 0000000..f43153e
--- /dev/null
+++ b/compat/pw_dup.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2000, 2002, 2012 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+
+#include <stdio.h>
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+#  include <stdlib.h>
+# endif
+#endif /* STDC_HEADERS */
+#ifdef HAVE_STRING_H
+# include <string.h>
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#if defined(HAVE_MALLOC_H) && !defined(STDC_HEADERS)
+# include <malloc.h>
+#endif /* HAVE_MALLOC_H && !STDC_HEADERS */
+#include <pwd.h>
+
+#define PW_SIZE(name, size)                            \
+do {                                                   \
+       if (pw->name) {                                 \
+               size = strlen(pw->name) + 1;            \
+               total += size;                          \
+       }                                               \
+} while (0)
+
+#define PW_COPY(name, size)                            \
+do {                                                   \
+       if (pw->name) {                                 \
+               (void)memcpy(cp, pw->name, size);       \
+               newpw->name = cp;                       \
+               cp += size;                             \
+       }                                               \
+} while (0)
+
+struct passwd *
+pw_dup(const struct passwd *pw)
+{
+       size_t nsize = 0, psize = 0, gsize = 0, dsize = 0, ssize = 0, total;
+#ifdef HAVE_LOGIN_CAP_H
+       size_t csize;
+#endif
+       struct passwd *newpw;
+       char *cp;
+
+       /* Allocate in one big chunk for easy freeing */
+       total = sizeof(struct passwd);
+       PW_SIZE(pw_name, nsize);
+       PW_SIZE(pw_passwd, psize);
+#ifdef HAVE_LOGIN_CAP_H
+       PW_SIZE(pw_class, csize);
+#endif
+       PW_SIZE(pw_gecos, gsize);
+       PW_SIZE(pw_dir, dsize);
+       PW_SIZE(pw_shell, ssize);
+
+       if ((cp = malloc(total)) == NULL)
+               return NULL;
+       newpw = (struct passwd *)cp;
+
+       /*
+        * Copy in passwd contents and make strings relative to space
+        * at the end of the buffer.
+        */
+       (void)memcpy(newpw, pw, sizeof(struct passwd));
+       cp += sizeof(struct passwd);
+
+       PW_COPY(pw_name, nsize);
+       PW_COPY(pw_passwd, psize);
+#ifdef HAVE_LOGIN_CAP_H
+       PW_COPY(pw_class, csize);
+#endif
+       PW_COPY(pw_gecos, gsize);
+       PW_COPY(pw_dir, dsize);
+       PW_COPY(pw_shell, ssize);
+
+       return newpw;
+}