diff options
Diffstat (limited to 'lib/pwio.c')
| -rw-r--r-- | lib/pwio.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/lib/pwio.c b/lib/pwio.c new file mode 100644 index 0000000..e59b473 --- /dev/null +++ b/lib/pwio.c @@ -0,0 +1,207 @@ +/* + * SPDX-FileCopyrightText: 1990 - 1994, Julianne Frances Haugh + * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz + * SPDX-FileCopyrightText: 2001 , Michał Moskal + * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko + * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <config.h> + +#ident "$Id$" + +#include "prototypes.h" +#include "defines.h" +#include <pwd.h> +#include <stdio.h> +#include "commonio.h" +#include "pwio.h" + +static /*@null@*/ /*@only@*/void *passwd_dup (const void *ent) +{ + const struct passwd *pw = ent; + + return __pw_dup (pw); +} + +static void passwd_free (/*@out@*/ /*@only@*/void *ent) +{ + struct passwd *pw = ent; + + pw_free (pw); +} + +static const char *passwd_getname (const void *ent) +{ + const struct passwd *pw = ent; + + return pw->pw_name; +} + +static void *passwd_parse (const char *line) +{ + return (void *) sgetpwent (line); +} + +static int passwd_put (const void *ent, FILE * file) +{ + const struct passwd *pw = ent; + + if ( (NULL == pw) + || (valid_field (pw->pw_name, ":\n") == -1) + || (valid_field (pw->pw_passwd, ":\n") == -1) + || (pw->pw_uid == (uid_t)-1) + || (pw->pw_gid == (gid_t)-1) + || (valid_field (pw->pw_gecos, ":\n") == -1) + || (valid_field (pw->pw_dir, ":\n") == -1) + || (valid_field (pw->pw_shell, ":\n") == -1) + || (strlen (pw->pw_name) + strlen (pw->pw_passwd) + + strlen (pw->pw_gecos) + strlen (pw->pw_dir) + + strlen (pw->pw_shell) + 100 > PASSWD_ENTRY_MAX_LENGTH)) { + return -1; + } + + return (putpwent (pw, file) == -1) ? -1 : 0; +} + +static struct commonio_ops passwd_ops = { + passwd_dup, + passwd_free, + passwd_getname, + passwd_parse, + passwd_put, + fgets, + fputs, + NULL, /* open_hook */ + NULL /* close_hook */ +}; + +static struct commonio_db passwd_db = { + PASSWD_FILE, /* filename */ + &passwd_ops, /* ops */ + NULL, /* fp */ +#ifdef WITH_SELINUX + NULL, /* scontext */ +#endif + 0644, /* st_mode */ + 0, /* st_uid */ + 0, /* st_gid */ + NULL, /* head */ + NULL, /* tail */ + NULL, /* cursor */ + false, /* changed */ + false, /* isopen */ + false, /* locked */ + false, /* readonly */ + false /* setname */ +}; + +int pw_setdbname (const char *filename) +{ + return commonio_setname (&passwd_db, filename); +} + +/*@observer@*/const char *pw_dbname (void) +{ + return passwd_db.filename; +} + +int pw_lock (void) +{ + return commonio_lock (&passwd_db); +} + +int pw_open (int mode) +{ + return commonio_open (&passwd_db, mode); +} + +/*@observer@*/ /*@null@*/const struct passwd *pw_locate (const char *name) +{ + return commonio_locate (&passwd_db, name); +} + +/*@observer@*/ /*@null@*/const struct passwd *pw_locate_uid (uid_t uid) +{ + const struct passwd *pwd; + + pw_rewind (); + while ( ((pwd = pw_next ()) != NULL) + && (pwd->pw_uid != uid)) { + } + + return pwd; +} + +int pw_update (const struct passwd *pw) +{ + return commonio_update (&passwd_db, (const void *) pw); +} + +int pw_remove (const char *name) +{ + return commonio_remove (&passwd_db, name); +} + +int pw_rewind (void) +{ + return commonio_rewind (&passwd_db); +} + +/*@observer@*/ /*@null@*/const struct passwd *pw_next (void) +{ + return commonio_next (&passwd_db); +} + +int pw_close (void) +{ + return commonio_close (&passwd_db); +} + +int pw_unlock (void) +{ + return commonio_unlock (&passwd_db); +} + +/*@null@*/struct commonio_entry *__pw_get_head (void) +{ + return passwd_db.head; +} + +void __pw_del_entry (const struct commonio_entry *ent) +{ + commonio_del_entry (&passwd_db, ent); +} + +struct commonio_db *__pw_get_db (void) +{ + return &passwd_db; +} + +static int pw_cmp (const void *p1, const void *p2) +{ + uid_t u1, u2; + + if ((*(struct commonio_entry **) p1)->eptr == NULL) + return 1; + if ((*(struct commonio_entry **) p2)->eptr == NULL) + return -1; + + u1 = ((struct passwd *) (*(struct commonio_entry **) p1)->eptr)->pw_uid; + u2 = ((struct passwd *) (*(struct commonio_entry **) p2)->eptr)->pw_uid; + + if (u1 < u2) + return -1; + else if (u1 > u2) + return 1; + else + return 0; +} + +/* Sort entries by UID */ +int pw_sort () +{ + return commonio_sort (&passwd_db, pw_cmp); +} |