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#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct Elems Elems;
struct Elems {
char **e;
int num;
};
typedef struct Indexs Indexs;
struct Indexs {
Elems **n;
int num;
};
void *
xcalloc(size_t nmemb, size_t size)
{
void *p;
if (!(p = calloc(nmemb, size))) {
perror("calloc");
exit(1);
}
return p;
}
void *
xmalloc(size_t size)
{
void *p;
if (!(p = malloc(size))) {
perror("malloc");
exit(1);
}
return p;
}
void *
xrealloc(void *ptr, size_t size)
{
if (!(ptr = realloc(ptr, size))) {
perror("realloc");
exit(1);
}
return ptr;
}
char *
xstrdup(const char *str)
{
char *ret;
if (!(ret = strdup(str))) {
perror("strdup");
exit(1);
}
return ret;
}
void
freeelem(Elems *e)
{
if (e != NULL) {
if (e->e != NULL) {
for (;e->num > 0; e->num--)
if (e->e[e->num - 1] != NULL)
free(e->e[e->num - 1]);
free(e->e);
}
free(e);
}
return;
}
void
freeindex(Indexs *i)
{
if (i != NULL) {
if (i->n != NULL) {
for (;i->num > 0; i->num--)
freeelem(i->n[i->num - 1]);
free(i->n);
}
free(i);
}
return;
}
void
addelem(Elems *e, char *s)
{
e->num++;
e->e = xrealloc(e->e, sizeof(char *) * e->num);
e->e[e->num - 1] = xstrdup(s);
return;
}
Elems *
getadv(char *str)
{
char *b, *e, *o, *bo;
Elems *ret;
ret = xcalloc(1, sizeof(Elems));
if (strchr(str, '\t')) {
addelem(ret, "i");
addelem(ret, "Happy helping ☃ here: You tried to "
"output a spurious tab character. This will "
"break gopher. Please review your scripts. "
"Have a nice day!");
addelem(ret, "Err");
addelem(ret, "server");
addelem(ret, "port");
return ret;
}
if (str[0] == '[') {
o = xstrdup(str);
b = o + 1;
bo = b;
while ((e = strchr(bo, '|')) != NULL) {
if (e != bo && e[-1] == '\\') {
memmove(&e[-1], e, strlen(e));
bo = e;
continue;
}
*e = '\0';
e++;
addelem(ret, b);
b = e;
bo = b;
}
e = strchr(b, ']');
if (e != NULL) {
*e = '\0';
addelem(ret, b);
}
free(o);
if (ret->e != NULL && ret->e[0] != NULL && ret->e[0][0] == '\0') {
freeelem(ret);
ret = xcalloc(1, sizeof(Elems));
addelem(ret, "i");
addelem(ret, "Happy helping ☃ here: You did not "
"specify an item type on this line. Please "
"review your scripts. "
"Have a nice day!");
addelem(ret, "Err");
addelem(ret, "server");
addelem(ret, "port");
return ret;
}
if (ret->e != NULL && ret->num == 5)
return ret;
/* Invalid entry: Give back the whole line. */
freeelem(ret);
ret = xcalloc(1, sizeof(Elems));
}
b = str;
if (*str == 't')
b++;
addelem(ret, "i");
addelem(ret, b);
addelem(ret, "Err");
addelem(ret, "server");
addelem(ret, "port");
return ret;
}
void
addindexs(Indexs *idx, Elems *el)
{
idx->num++;
idx->n = xrealloc(idx->n, sizeof(Elems) * idx->num);
idx->n[idx->num - 1] = el;
return;
}
Indexs *
scanfile(char *fname)
{
char *ln = NULL;
size_t linesiz = 0;
ssize_t n;
FILE *fp;
Indexs *ret;
Elems *el;
if (!(fp = fopen(fname, "r")))
return NULL;
ret = xcalloc(1, sizeof(Indexs));
while ((n = getline(&ln, &linesiz, fp)) > 0) {
if (ln[n - 1] == '\n')
ln[--n] = '\0';
el = getadv(ln);
if(el == NULL)
continue;
addindexs(ret, el);
}
if (ferror(fp))
perror("getline");
free(ln);
fclose(fp);
if (ret->n == NULL) {
free(ret);
return NULL;
}
return ret;
}
int
printelem(int fd, Elems *el, char *file, char *base, char *addr, char *port)
{
char *path, *p, buf[PATH_MAX+1];
int len;
if (!strcmp(el->e[3], "server")) {
free(el->e[3]);
el->e[3] = xstrdup(addr);
}
if (!strcmp(el->e[4], "port")) {
free(el->e[4]);
el->e[4] = xstrdup(port);
}
/*
* Ignore if the path is from base, if it might be some h type with
* some URL and ignore various types that have different semantics but
* to point to some file or directory.
*/
if ((el->e[2][0] != '\0'
&& el->e[2][0] != '/'
&& el->e[0][0] != 'i'
&& el->e[0][0] != '2'
&& el->e[0][0] != '3'
&& el->e[0][0] != '8'
&& el->e[0][0] != 'w'
&& el->e[0][0] != 'T') &&
!(el->e[0][0] == 'h' && !strncmp(el->e[2], "URL:", 4))) {
path = file + strlen(base);
if ((p = strrchr(path, '/')))
len = p - path;
else
len = strlen(path);
snprintf(buf, sizeof(buf), "%s%.*s/%s", base, len, path, el->e[2]);
if ((path = realpath(buf, NULL)) &&
!strncmp(base, path, strlen(base))) {
p = path + strlen(base);
free(el->e[2]);
el->e[2] = xstrdup(p[0]? p : "/");
}
free(path);
}
if (dprintf(fd, "%.1s%s\t%s\t%s\t%s\r\n", el->e[0], el->e[1], el->e[2],
el->e[3], el->e[4]) < 0) {
perror("printelem: dprintf");
return -1;
}
return 0;
}
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