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916c0492fb
Move out string operations to another file, and introduce a frontend to snprintf for various situations. This change is important for catching and eliminating sprintf overflows, which are as of now many times silently corrupting memory. Signed-off-by: Dan Farina <drfarina@acm.org> Signed-off-by: Peter van Hardenberg <pvh@heroku.com>
73 lines
1.1 KiB
C
73 lines
1.1 KiB
C
/*
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* strutil.c
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*
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* Copyright (c) Heroku, 2010
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*
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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "strutil.h"
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static int xvsnprintf(char *str, size_t size, const char *format, va_list ap);
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static int
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xvsnprintf(char *str, size_t size, const char *format, va_list ap)
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{
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int retval;
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retval = vsnprintf(str, size, format, ap);
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if (retval >= size)
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{
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fprintf(stderr, "Buffer not large enough to format entire string\n");
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exit(255);
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}
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return retval;
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}
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int
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xsnprintf(char *str, size_t size, const char *format, ...)
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{
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va_list arglist;
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int retval;
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va_start(arglist, format);
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retval = xvsnprintf(str, size, format, arglist);
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va_end(arglist);
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return retval;
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}
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int
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sqlquery_snprintf(char *str, const char *format, ...)
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{
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va_list arglist;
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int retval;
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va_start(arglist, format);
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retval = xvsnprintf(str, QUERY_STR_LEN, format, arglist);
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va_end(arglist);
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return retval;
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}
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int maxlen_snprintf(char *str, const char *format, ...)
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{
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va_list arglist;
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int retval;
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va_start(arglist, format);
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retval = xvsnprintf(str, MAXLEN, format, arglist);
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va_end(arglist);
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return retval;
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}
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