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Initial revision

    1: /*
    2:  * Copyright (c) 2010, 2013 Todd C. Miller <Todd.Miller@courtesan.com>
    3:  *
    4:  * Permission to use, copy, modify, and distribute this software for any
    5:  * purpose with or without fee is hereby granted, provided that the above
    6:  * copyright notice and this permission notice appear in all copies.
    7:  *
    8:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    9:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   10:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   11:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   12:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   13:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   14:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   15:  */
   16: 
   17: #ifndef _SUDO_DSO_H
   18: #define _SUDO_DSO_H
   19: 
   20: /* Values for sudo_dso_load() mode. */
   21: #define SUDO_DSO_LAZY	 0x1
   22: #define SUDO_DSO_NOW	 0x2
   23: #define SUDO_DSO_GLOBAL	 0x4
   24: #define SUDO_DSO_LOCAL	 0x8
   25: 
   26: /* Special handle arguments for sudo_dso_findsym(). */
   27: #define SUDO_DSO_NEXT	 ((void *)-1)	/* Search subsequent objects. */
   28: #define SUDO_DSO_DEFAULT ((void *)-2)	/* Use default search algorithm. */
   29: #define SUDO_DSO_SELF	 ((void *)-3)	/* Search the caller itself. */
   30: 
   31: /* Internal structs for static linking of plugins. */
   32: struct sudo_preload_symbol {
   33:     const char *name;
   34:     void *addr;
   35: };
   36: struct sudo_preload_table {
   37:     const char *path;
   38:     void *handle;
   39:     struct sudo_preload_symbol *symbols;
   40: };
   41: 
   42: /* Public functions. */
   43: char *sudo_dso_strerror(void);
   44: int sudo_dso_unload(void *handle);
   45: void *sudo_dso_findsym(void *handle, const char *symbol);
   46: void *sudo_dso_load(const char *path, int mode);
   47: void sudo_dso_preload_table(struct sudo_preload_table *table);
   48: 
   49: #endif /* _SUDO_DSO_H */