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-rw-r--r--klibc_fixups.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/klibc_fixups.c b/klibc_fixups.c
index a99166811c..927f2f649a 100644
--- a/klibc_fixups.c
+++ b/klibc_fixups.c
@@ -1,10 +1,110 @@
+/*
+ * klibc_fixups.c - very simple implementation of stuff missing in klibc
+ *
+ * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2004 Kay Sievers <kay@vrfy.org>
+ *
+ * This program 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 version 2 of the License.
+ *
+ * This program 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 program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
#ifdef __KLIBC__
#include <stdlib.h>
+#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <sys/types.h>
+
#include "klibc_fixups.h"
+#include "logging.h"
+
+#define PW_FILE "/etc/passwd"
+#define GR_FILE "/etc/group"
+
+/* return the id of a passwd style line, selected by the users name */
+static unsigned long get_id_by_name(const char *uname, const char *dbfile)
+{
+ unsigned long id = -1;
+ FILE *file;
+ char buf[255];
+ char *pos;
+ char *name;
+ char *idstr;
+ char *tail;
+
+ file = fopen(dbfile, "r");
+ if (file == NULL) {
+ dbg("unable to open file '%s'", dbfile);
+ return -1;
+ }
+
+ while (1) {
+ pos = fgets(buf, sizeof(buf), file);
+ if (pos == NULL)
+ break;
+
+ /* get name */
+ name = strsep(&pos, ":");
+ if (name == NULL)
+ continue;
+
+ /* skip pass */
+ if (strsep(&pos, ":") == NULL)
+ continue;
+
+ /* get id */
+ idstr = strsep(&pos, ":");
+ if (idstr == NULL)
+ continue;
+
+ if (strcmp(uname, name) == 0) {
+ id = strtoul(idstr, &tail, 10);
+ if (tail == NULL)
+ id = -1;
+ else
+ dbg("id for '%s' is '%li'", name, id);
+ break;
+ }
+ }
+
+ fclose(file);
+ return id;
+}
+
+struct passwd *getpwnam(const char *name)
+{
+ static struct passwd pw;
+
+ memset(&pw, 0x00, sizeof(struct passwd));
+ pw.pw_uid = (uid_t) get_id_by_name(name, PW_FILE);
+ if (pw.pw_uid < 0)
+ return NULL;
+ else
+ return &pw;
+}
+
+struct group *getgrnam(const char *name)
+{
+ static struct group gr;
+
+ memset(&gr, 0x00, sizeof(struct group));
+ gr.gr_gid = (gid_t) get_id_by_name(name, GR_FILE);
+ if (gr.gr_gid < 0)
+ return NULL;
+ else
+ return &gr;
+}
#endif