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Avoid segfault if template arg number is zero

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If the user enters \0 as a template argument, print a warning and exit
gracefully. Fixes an issue mentioned in #118.
This commit is contained in:
Marc Payne 2015-08-29 13:44:44 -06:00
parent 3414955ad6
commit c7108d8261
1 changed files with 2 additions and 0 deletions
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2
src/template.cc
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@ -84,6 +84,8 @@ static char *backslash_escape(const char *src, char **templates, unsigned int te
if ((sscanf(p + 1, "%u%n", &tmpl_num, &digits) <= 0) ||
(tmpl_num > template_count))
break;
if (tmpl_num == 0)
CRIT_ERR(NULL, NULL, "invalid template argument \\0; arguments must start at \\1");
dup_len += strlen(templates[tmpl_num - 1]);
src_dup = (char*) realloc(src_dup, dup_len * sizeof(char));
sprintf(src_dup + dup_idx, "%s", templates[tmpl_num - 1]);