diff options
| -rw-r--r-- | klibc_fixups.c | 100 | ||||
| -rw-r--r-- | klibc_fixups.h | 25 |
2 files changed, 108 insertions, 17 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 diff --git a/klibc_fixups.h b/klibc_fixups.h index 1ac112b087..19bfd51caa 100644 --- a/klibc_fixups.h +++ b/klibc_fixups.h @@ -3,19 +3,6 @@ #ifndef KLIBC_FIXUPS_H #define KLIBC_FIXUPS_H -struct group { - char *gr_name; /* group name */ - char *gr_passwd; /* group password */ - gid_t gr_gid; /* group id */ - char **gr_mem; /* group members */ -}; - -static inline struct group *getgrnam(const char *name) -{ - return NULL; -} - - struct passwd { char *pw_name; /* user name */ char *pw_passwd; /* user password */ @@ -26,11 +13,15 @@ struct passwd { char *pw_shell; /* shell program */ }; -static inline struct passwd *getpwnam(const char *name) -{ - return NULL; -} +struct group { + char *gr_name; /* group name */ + char *gr_passwd; /* group password */ + gid_t gr_gid; /* group id */ + char **gr_mem; /* group members */ +}; +struct passwd *getpwnam(const char *name); +struct group *getgrnam(const char *name); #endif |