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82962619c6
Here we get a very dumb getpwnam() and getgrnam() for klibc to stop the confusion of not handling textual id's if klibc is used. If used with initrd we just need to copy the /etc/passwd and /etc/group file and all should work well.
111 lines
2.3 KiB
C
111 lines
2.3 KiB
C
/*
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* klibc_fixups.c - very simple implementation of stuff missing in klibc
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*
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* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
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* Copyright (C) 2004 Kay Sievers <kay@vrfy.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifdef __KLIBC__
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <sys/types.h>
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#include "klibc_fixups.h"
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#include "logging.h"
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#define PW_FILE "/etc/passwd"
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#define GR_FILE "/etc/group"
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/* return the id of a passwd style line, selected by the users name */
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static unsigned long get_id_by_name(const char *uname, const char *dbfile)
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{
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unsigned long id = -1;
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FILE *file;
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char buf[255];
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char *pos;
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char *name;
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char *idstr;
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char *tail;
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file = fopen(dbfile, "r");
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if (file == NULL) {
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dbg("unable to open file '%s'", dbfile);
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return -1;
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}
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while (1) {
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pos = fgets(buf, sizeof(buf), file);
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if (pos == NULL)
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break;
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/* get name */
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name = strsep(&pos, ":");
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if (name == NULL)
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continue;
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/* skip pass */
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if (strsep(&pos, ":") == NULL)
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continue;
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/* get id */
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idstr = strsep(&pos, ":");
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if (idstr == NULL)
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continue;
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if (strcmp(uname, name) == 0) {
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id = strtoul(idstr, &tail, 10);
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if (tail == NULL)
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id = -1;
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else
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dbg("id for '%s' is '%li'", name, id);
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break;
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}
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}
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fclose(file);
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return id;
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}
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struct passwd *getpwnam(const char *name)
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{
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static struct passwd pw;
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memset(&pw, 0x00, sizeof(struct passwd));
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pw.pw_uid = (uid_t) get_id_by_name(name, PW_FILE);
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if (pw.pw_uid < 0)
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return NULL;
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else
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return &pw;
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}
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struct group *getgrnam(const char *name)
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{
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static struct group gr;
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memset(&gr, 0x00, sizeof(struct group));
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gr.gr_gid = (gid_t) get_id_by_name(name, GR_FILE);
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if (gr.gr_gid < 0)
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return NULL;
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else
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return &gr;
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}
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#endif
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