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elinks/src/protocol/common.c

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3.8 KiB
C
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/* Shared protocol functions */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h> /* FreeBSD needs this before resource.h */
#endif
#include <sys/types.h> /* FreeBSD needs this before resource.h */
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "elinks.h"
#include "config/options.h"
#include "osdep/osdep.h"
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#include "protocol/common.h"
#include "protocol/protocol.h"
#include "protocol/uri.h"
#include "util/conv.h"
#include "util/memory.h"
#include "util/string.h"
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/* Close all non-terminal file descriptors. */
void
close_all_non_term_fd(void)
{
int n;
int max = 1024;
#ifdef RLIMIT_NOFILE
struct rlimit lim;
if (!getrlimit(RLIMIT_NOFILE, &lim))
max = lim.rlim_max;
#endif
for (n = 3; n < max; n++)
close(n);
}
struct connection_state
init_directory_listing(struct string *page, struct uri *uri)
{
struct string dirpath = NULL_STRING;
struct string decoded = NULL_STRING;
struct string location = NULL_STRING;
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const char *info;
int local = (uri->protocol == PROTOCOL_FILE);
if (!init_string(page)
|| !init_string(&dirpath)
|| !init_string(&decoded)
|| !init_string(&location)
|| !add_uri_to_string(&dirpath, uri, URI_DATA)
|| !add_uri_to_string(&location, uri, URI_DIR_LOCATION))
goto out_of_memory;
if (dirpath.length > 0
&& !dir_sep(dirpath.source[dirpath.length - 1])
&& !add_char_to_string(&dirpath, local ? CHAR_DIR_SEP : '/'))
goto out_of_memory;
/* Decode uri for displaying. */
if (!add_string_to_string(&decoded, &dirpath))
goto out_of_memory;
decode_uri_string(&decoded);
if (!local && !add_char_to_string(&location, '/'))
goto out_of_memory;
if (!add_to_string(page, "<html>\n<head><title>"))
goto out_of_memory;
if (!local && !add_html_to_string(page, location.source, location.length))
goto out_of_memory;
if (!add_html_to_string(page, decoded.source, decoded.length)
|| !add_to_string(page, "</title>\n<base href=\"")
|| !add_html_to_string(page, location.source, location.length)
|| !add_html_to_string(page, dirpath.source, dirpath.length))
goto out_of_memory;
if (!add_to_string(page, "\" />\n</head>\n<body>\n<h2>"))
goto out_of_memory;
/* Use module names? */
switch (uri->protocol) {
case PROTOCOL_FILE:
info = "Local";
break;
case PROTOCOL_FSP:
info = "FSP";
break;
case PROTOCOL_FTP:
info = "FTP";
break;
case PROTOCOL_GOPHER:
info = "Gopher";
break;
case PROTOCOL_SMB:
info = "Samba";
break;
default:
info = "?";
}
if (!add_to_string(page, info)
|| !add_to_string(page, " directory "))
goto out_of_memory;
if (!local && !add_string_to_string(page, &location))
goto out_of_memory;
/* Make the directory path with links to each subdir. */
{
const char *slash = dirpath.source;
const char *pslash = slash;
const char sep = local ? CHAR_DIR_SEP : '/';
while ((slash = strchr(slash, sep)) != NULL) {
done_string(&decoded);
if (!init_string(&decoded)
|| !add_bytes_to_string(&decoded, pslash, slash - pslash))
goto out_of_memory;
decode_uri_string(&decoded);
if (!add_to_string(page, "<a href=\"")
|| !add_html_to_string(page, location.source, location.length)
|| !add_html_to_string(page, dirpath.source, slash + 1 - dirpath.source)
|| !add_to_string(page, "\">")
|| !add_html_to_string(page, decoded.source, decoded.length)
|| !add_to_string(page, "</a>")
|| !add_html_to_string(page, &sep, 1))
goto out_of_memory;
pslash = ++slash;
}
}
if (!add_to_string(page, "</h2>\n<pre>")) {
out_of_memory:
done_string(page);
}
done_string(&dirpath);
done_string(&decoded);
done_string(&location);
return page->length > 0
? connection_state(S_OK)
: connection_state(S_OUT_OF_MEM);
}