split out librc-independent helpers into a dedicated header file
Many of these helpers are not special to librc, so split them out so they can be used in all source trees (including libeinfo). Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Mike Frysinger
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137
src/includes/helpers.h
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137
src/includes/helpers.h
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@ -0,0 +1,137 @@
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/*
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helpers.h
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This is private to us and not for user consumption
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*/
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/*
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* Copyright (c) 2007-2009 Roy Marples <roy@marples.name>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef __HELPERS_H__
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#define __HELPERS_H__
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#define ERRX fprintf (stderr, "out of memory\n"); exit (1)
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#define UNCONST(a) ((void *)(unsigned long)(const void *)(a))
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#ifdef lint
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# define _unused
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#endif
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#if __GNUC__ > 2 || defined(__INTEL_COMPILER)
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# define _dead __attribute__((__noreturn__))
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# define _unused __attribute__((__unused__))
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#else
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# define _dead
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# define _unused
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#endif
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/* Some libc implemntations don't have these */
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#ifndef TAILQ_CONCAT
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#define TAILQ_CONCAT(head1, head2, field) do { \
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if (!TAILQ_EMPTY(head2)) { \
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*(head1)->tqh_last = (head2)->tqh_first; \
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(head2)->tqh_first->field.tqe_prev = (head1)->tqh_last; \
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(head1)->tqh_last = (head2)->tqh_last; \
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TAILQ_INIT((head2)); \
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} \
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} while (0)
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#endif
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#ifndef TAILQ_FOREACH_SAFE
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#define TAILQ_FOREACH_SAFE(var, head, field, tvar) \
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for ((var) = TAILQ_FIRST((head)); \
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(var) && ((tvar) = TAILQ_NEXT((var), field), 1); \
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(var) = (tvar))
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#endif
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#ifdef __GLIBC__
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# if ! defined (__UCLIBC__) && ! defined (__dietlibc__)
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# define strlcpy(dst, src, size) snprintf(dst, size, "%s", src)
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# endif
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#endif
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#ifndef timespecsub
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#define timespecsub(tsp, usp, vsp) \
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do { \
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(vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \
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(vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \
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if ((vsp)->tv_nsec < 0) { \
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(vsp)->tv_sec--; \
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(vsp)->tv_nsec += 1000000000L; \
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} \
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} while (/* CONSTCOND */ 0)
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#endif
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_unused static void *xmalloc (size_t size)
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{
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void *value = malloc(size);
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if (value)
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return (value);
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ERRX;
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/* NOTREACHED */
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}
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_unused static void *xrealloc(void *ptr, size_t size)
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{
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void *value = realloc(ptr, size);
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if (value)
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return (value);
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ERRX;
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/* NOTREACHED */
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}
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_unused static char *xstrdup(const char *str)
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{
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char *value;
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if (! str)
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return (NULL);
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value = strdup(str);
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if (value)
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return (value);
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ERRX;
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/* NOTREACHED */
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}
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#undef ERRX
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/* basename_c never modifies the argument. As such, if there is a trailing
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* slash then an empty string is returned. */
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_unused static const char *basename_c(const char *path)
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{
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const char *slash = strrchr(path, '/');
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if (slash)
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return (++slash);
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return (path);
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}
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#endif
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@ -38,6 +38,8 @@
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#include <string.h>
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#include <unistd.h>
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#include "helpers.h"
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#define RC_LEVEL_BOOT "boot"
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#define RC_LEVEL_DEFAULT "default"
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@ -52,98 +54,6 @@
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#define RC_SVCDIR_STARTED RC_SVCDIR "/started"
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#define RC_SVCDIR_COLDPLUGGED RC_SVCDIR "/coldplugged"
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#define ERRX fprintf (stderr, "out of memory\n"); exit (1)
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#define UNCONST(a) ((void *)(unsigned long)(const void *)(a))
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#ifdef lint
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# define _unused
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#endif
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#if __GNUC__ > 2 || defined(__INTEL_COMPILER)
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# define _dead __attribute__((__noreturn__))
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# define _unused __attribute__((__unused__))
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#else
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# define _dead
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# define _unused
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#endif
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/* Some libc implemntations don't have these */
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#ifndef TAILQ_CONCAT
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#define TAILQ_CONCAT(head1, head2, field) do { \
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if (!TAILQ_EMPTY(head2)) { \
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*(head1)->tqh_last = (head2)->tqh_first; \
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(head2)->tqh_first->field.tqe_prev = (head1)->tqh_last; \
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(head1)->tqh_last = (head2)->tqh_last; \
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TAILQ_INIT((head2)); \
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} \
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} while (0)
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#endif
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#ifndef TAILQ_FOREACH_SAFE
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#define TAILQ_FOREACH_SAFE(var, head, field, tvar) \
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for ((var) = TAILQ_FIRST((head)); \
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(var) && ((tvar) = TAILQ_NEXT((var), field), 1); \
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(var) = (tvar))
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#endif
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#ifdef __GLIBC__
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# if ! defined (__UCLIBC__) && ! defined (__dietlibc__)
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# define strlcpy(dst, src, size) snprintf(dst, size, "%s", src)
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# endif
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#endif
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#ifndef timespecsub
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#define timespecsub(tsp, usp, vsp) \
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do { \
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(vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \
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(vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \
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if ((vsp)->tv_nsec < 0) { \
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(vsp)->tv_sec--; \
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(vsp)->tv_nsec += 1000000000L; \
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} \
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} while (/* CONSTCOND */ 0)
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#endif
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_unused static void *xmalloc (size_t size)
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{
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void *value = malloc(size);
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if (value)
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return (value);
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ERRX;
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/* NOTREACHED */
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}
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_unused static void *xrealloc(void *ptr, size_t size)
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{
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void *value = realloc(ptr, size);
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if (value)
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return (value);
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ERRX;
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/* NOTREACHED */
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}
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_unused static char *xstrdup(const char *str)
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{
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char *value;
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if (! str)
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return (NULL);
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value = strdup(str);
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if (value)
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return (value);
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ERRX;
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/* NOTREACHED */
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}
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#undef ERRX
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_unused static bool exists(const char *pathname)
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{
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struct stat buf;
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@ -176,16 +86,5 @@ int is_writable(const char *);
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#define service_start(service) exec_service(service, "start");
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#define service_stop(service) exec_service(service, "stop");
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/* basename_c never modifies the argument. As such, if there is a trailing
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* slash then an empty string is returned. */
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_unused static const char *basename_c(const char *path)
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{
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const char *slash = strrchr(path, '/');
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if (slash)
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return (++slash);
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return (path);
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}
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int parse_mode(mode_t *, char *);
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#endif
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@ -51,6 +51,7 @@ const char libeinfo_copyright[] = "Copyright (c) 2007-2008 Roy Marples";
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#include <unistd.h>
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#include "einfo.h"
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#include "helpers.h"
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#include "hidden-visibility.h"
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hidden_proto(ecolor)
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@ -225,27 +226,6 @@ strlcat(char *dst, const char *src, size_t size)
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return dst_n + (s - src);
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}
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static size_t
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strlcpy(char *dst, const char *src, size_t size)
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{
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const char *s = src;
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size_t n = size;
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if (n && --n)
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do {
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if (!(*dst++ = *src++))
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break;
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} while (--n);
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if (!n) {
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if (size)
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*dst = '\0';
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while (*src++);
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}
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return src - s - 1;
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}
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# endif
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#endif
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@ -93,7 +93,7 @@ ebegin "Checking for x* func usage"
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out=$(cd ${top_srcdir}; find src -name '*.[ch]' \
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-exec grep -n -E '\<(malloc|strdup)[[:space:]]*\(' {} + \
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| grep -v \
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-e src/includes/rc-misc.h \
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-e src/includes/helpers.h \
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-e src/libeinfo/libeinfo.c)
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[ -z "${out}" ]
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eend $? "These need to be using the x* variant:"$'\n'"${out}"
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