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-rw-r--r--libmailutils/fgetpwent.c163
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diff --git a/libmailutils/fgetpwent.c b/libmailutils/fgetpwent.c
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+++ b/libmailutils/fgetpwent.c
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+/* GNU Mailutils -- a suite of utilities for electronic mail
+ Copyright (C) 1999, 2000, 2001, 2007, 2010 Free Software Foundation,
+ Inc.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 3 of the License, or (at your option) any later version.
+
+ This library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General
+ Public License along with this library; if not, write to the
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301 USA */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#include <pwd.h>
+#include <string.h>
+#include <stdlib.h>
+
+/*
+ Written by Alain Magloire.
+ Simple replacement for fgetpwent(), it is not :
+ - thread safe;
+ - static buffer was not use since it will limit the size
+ of the entry. But rather memory is allocated and __never__
+ release. The memory will grow if need be.
+ - no support for shadow
+ - no support for NIS(+)
+*/
+
+static char *buffer;
+static size_t buflen;
+static struct passwd pw;
+
+static char *
+parse_line (char *s, char **p)
+{
+ if (*s)
+ {
+ char *sep = strchr (s, ':');
+ if (sep)
+ {
+ *sep++ = '\0';
+ *p = sep;
+ }
+ else
+ *p = s + strlen (s);
+ }
+ else
+ *p = s;
+ return s;
+}
+
+static struct passwd *
+getentry (char *s)
+{
+ char *p;
+ pw.pw_name = parse_line (s, &p);
+ s = p;
+ pw.pw_passwd = parse_line (s, &p);
+ s = p;
+ pw.pw_uid = strtoul (parse_line (s, &p), NULL, 10);
+ s = p;
+ pw.pw_gid = strtoul (parse_line (s, &p), NULL, 10);
+ s = p;
+ pw.pw_gecos = parse_line (s, &p);
+ s = p;
+ pw.pw_dir = parse_line (s, &p);
+ s = p;
+ pw.pw_shell = parse_line (s, &p);
+ return &pw;
+}
+
+struct passwd *
+mu_fgetpwent (FILE *fp)
+{
+ size_t pos = 0;
+ int done = 0;
+ struct passwd *pw = NULL;
+
+ /* Allocate buffer if not yet available. */
+ /* This buffer will be never free(). */
+ if (buffer == NULL)
+ {
+ buflen = 1024;
+ buffer = malloc (buflen);
+ if (buffer == NULL)
+ return NULL;
+ }
+
+ do
+ {
+ if (fgets (buffer + pos, buflen, fp) != NULL)
+ {
+ /* Need a full line. */
+ if (buffer[strlen (buffer) - 1] == '\n')
+ {
+ /* reset marker position. */
+ pos = 0;
+ /* Nuke trailing newline. */
+ buffer[strlen (buffer) - 1] = '\0';
+
+ /* Skip comments. */
+ if (buffer[0] != '#')
+ {
+ done = 1;
+ pw = getentry (buffer);
+ }
+ }
+ else
+ {
+ /* Line is too long reallocate the buffer. */
+ char *tmp;
+ pos = strlen (buffer);
+ buflen *= 2;
+ tmp = realloc (buffer, buflen);
+ if (tmp)
+ buffer = tmp;
+ else
+ done = 1;
+ }
+ }
+ else
+ done = 1;
+ } while (!done);
+
+ return pw;
+
+}
+
+#ifdef STANDALONE
+int
+main ()
+{
+ FILE *fp = fopen ("/etc/passwd", "r");
+ if (fp)
+ {
+ struct passwd *pwd;
+ while ((pwd = fgetpwent (fp)))
+ {
+ printf ("--------------------------------------\n");
+ printf ("name %s\n", pwd->pw_name);
+ printf ("passwd %s\n", pwd->pw_passwd);
+ printf ("uid %d\n", pwd->pw_uid);
+ printf ("gid %d\n", pwd->pw_gid);
+ printf ("gecos %s\n", pwd->pw_gecos);
+ printf ("dir %s\n", pwd->pw_dir);
+ printf ("shell %s\n", pwd->pw_shell);
+ }
+ }
+ return 0;
+}
+
+#endif

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