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/*
* userv - lib.c
* useful utility routines' imports and exports, used in daemon
*
* userv is copyright Ian Jackson and other contributors.
* See README for full authorship information.
*
* This 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; either version 3 of the License, or
* (at your option) any later version.
*
* 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 userv; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef LIB_H
#define LIB_H
char *xstrcat3save(const char *a, const char *b, const char *c);
char *xstrsubsave(const char *begin, int len);
void miscerror(const char *what) NONRETURNING;
int makeroom(char **buffer, int *size, int needed);
/* makeroom returns -1 if needed was far too large; otherwise returns 0. */
/* It doesn't appear to be documented whether [v]snprintf put a null
* in if they overrun. GNU libc does, but I don't want to rely on
* that.
* So here are some functions that always do, regardless - including
* versions of strcat and strcpy. The ...nyt...cat functions take the
* maximum length of the resulting buffer as size parameter, rather
* than the maximum length of the added portion.
*
* So,
* ...n... specify copied length (inc. any null), may or may not null-terminate
* ...ny... specify copied length (inc. null) and always null-terminate
* ...nyt...cat specify total buffer length and always null-terminate
*/
/* Function names best pronounced with a Russian accent. */
void vsnyprintf(char *buffer, size_t size, const char *fmt, va_list al);
void snyprintf(char *buffer, size_t size, const char *fmt, ...) PRINTFFORMAT(3,4);
void strnycpy(char *dest, const char *src, size_t size);
void vsnytprintfcat(char *buffer, size_t size, const char *fmt, va_list al);
void snytprintfcat(char *buffer, size_t size, const char *fmt, ...) PRINTFFORMAT(3,4);
void strnytcat(char *dest, const char *src, size_t size);
#ifndef HAVE_SETENV
int setenv(const char *name, const char *value, int overwrite);
#endif /* HAVE_SETENV */
#endif /* LIB_H */
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