109 lines
2.6 KiB
C
109 lines
2.6 KiB
C
/* $Id: commonio.h,v 1.8 2004/10/11 04:40:29 kloczek Exp $ */
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#ifdef WITH_SELINUX
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#include <selinux/selinux.h>
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#endif
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/*
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* Linked list entry.
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*/
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struct commonio_entry {
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char *line;
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void *eptr; /* struct passwd, struct spwd, ... */
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struct commonio_entry *prev, *next;
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int changed:1;
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};
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/*
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* Operations depending on database type: passwd, group, shadow etc.
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*/
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struct commonio_ops {
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/*
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* Make a copy of the object (for example, struct passwd)
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* and all strings pointed by it, in malloced memory.
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*/
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void *(*dup)(const void *);
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/*
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* free() the object including any strings pointed by it.
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*/
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void (*free)(void *);
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/*
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* Return the name of the object (for example, pw_name
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* for struct passwd).
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*/
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const char *(*getname)(const void *);
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/*
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* Parse a string, return object (in static area -
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* should be copied using the dup operation above).
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*/
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void *(*parse)(const char *);
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/*
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* Write the object to the file (this calls putpwent()
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* for struct passwd, for example).
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*/
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int (*put)(const void *, FILE *);
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/*
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* fgets and fputs (can be replaced by versions that
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* understand line continuation conventions).
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*/
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char *(*fgets)(char *, int, FILE *);
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int (*fputs)(const char *, FILE *);
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};
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/*
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* Database structure.
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*/
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struct commonio_db {
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/*
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* Name of the data file.
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*/
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char filename[1024];
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/*
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* Operations from above.
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*/
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struct commonio_ops *ops;
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/*
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* Currently open file stream.
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*/
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FILE *fp;
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#ifdef WITH_SELINUX
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security_context_t scontext;
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#endif
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/*
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* Head, tail, current position in linked list.
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*/
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struct commonio_entry *head, *tail, *cursor;
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/*
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* Various flags.
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*/
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int changed:1;
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int isopen:1;
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int locked:1;
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int readonly:1;
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};
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extern int commonio_setname(struct commonio_db *, const char *);
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extern int commonio_present(const struct commonio_db *);
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extern int commonio_lock(struct commonio_db *);
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extern int commonio_lock_nowait(struct commonio_db *);
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extern int commonio_open(struct commonio_db *, int);
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extern const void *commonio_locate(struct commonio_db *, const char *);
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extern int commonio_update(struct commonio_db *, const void *);
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extern int commonio_remove(struct commonio_db *, const char *);
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extern int commonio_rewind(struct commonio_db *);
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extern const void *commonio_next(struct commonio_db *);
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extern int commonio_close(struct commonio_db *);
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extern int commonio_unlock(struct commonio_db *);
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extern void commonio_del_entry(struct commonio_db *, const struct commonio_entry *);
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extern int commonio_sort_wrt(struct commonio_db *shadow, struct commonio_db *passwd);
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extern int commonio_sort(struct commonio_db *db, int (*cmp)(const void *, const void *));
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