static int file_callback(const struct option *opt, const char *arg, int unset)
{
struct grep_opt *grep_opt = opt->value;
int from_stdin = !strcmp(arg, "-");
FILE *patterns;
int lno = 0;
struct strbuf sb = STRBUF_INIT;
patterns = from_stdin ? stdin : fopen(arg, "r");
if (!patterns)
die_errno(_("cannot open '%s'"), arg);
while (strbuf_getline(&sb, patterns, '\n') == 0) {
char *s;
size_t len;
/* ignore empty line like grep does */
if (sb.len == 0)
continue;
s = strbuf_detach(&sb, &len);
append_grep_pat(grep_opt, s, len, arg, ++lno, GREP_PATTERN);
}
if (!from_stdin)
fclose(patterns);
strbuf_release(&sb);
return 0;
}
struct grep_opt *grep_opt_dup(const struct grep_opt *opt)
{
struct grep_pat *pat;
struct grep_opt *ret = xmalloc(sizeof(struct grep_opt));
*ret = *opt;
ret->pattern_list = NULL;
ret->pattern_tail = &ret->pattern_list;
for(pat = opt->pattern_list; pat != NULL; pat = pat->next)
{
if(pat->token == GREP_PATTERN_HEAD)
append_header_grep_pattern(ret, pat->field,
pat->pattern);
else
append_grep_pat(ret, pat->pattern, pat->patternlen,
pat->origin, pat->no, pat->token);
}
return ret;
}
void append_grep_pattern(struct grep_opt *opt, const char *pat,
const char *origin, int no, enum grep_pat_token t)
{
append_grep_pat(opt, pat, strlen(pat), origin, no, t);
}
