2 * Copyright (c) 2007 Denys Vlasenko <vda.linux@googlemail.com>
4 * Licensed under GPLv2, see file LICENSE in this source tree.
8 * This program is a CGI application. It outputs directory index page.
9 * Put it into cgi-bin/index.cgi and chmod 0755.
13 i486-linux-uclibc-gcc \
14 -static -static-libgcc \
15 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 \
16 -Wall -Wshadow -Wwrite-strings -Wundef -Wstrict-prototypes -Werror \
17 -Wold-style-definition -Wdeclaration-after-statement -Wno-pointer-sign \
18 -Wmissing-prototypes -Wmissing-declarations \
19 -Os -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer \
20 -ffunction-sections -fdata-sections -fno-guess-branch-probability \
22 -falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1 \
23 -march=i386 -mpreferred-stack-boundary=2 \
24 -Wl,-Map -Wl,link.map -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \
25 httpd_indexcgi.c -o index.cgi
28 /* We don't use printf, as it pulls in >12 kb of code from uclibc (i386). */
29 /* Currently malloc machinery is the biggest part of libc we pull in. */
30 /* We have only one realloc and one strdup, any idea how to do without? */
32 /* Size (i386, static uclibc, approximate):
33 * text data bss dec hex filename
34 * 13036 44 3052 16132 3f04 index.cgi
35 * 2576 4 2048 4628 1214 index.cgi.o
38 #include <sys/types.h>
49 /* Appearance of the table is controlled by style sheet *ONLY*,
50 * formatting code uses <TAG class=CLASS> to apply style
51 * to elements. Edit stylesheet to your liking and recompile. */
57 "background-color:#fff5ee;" "\n"\
58 "border-width:1px;" /* 1px 1px 1px 1px; */ "\n"\
59 "border-spacing:2px;" "\n"\
60 "border-style:solid;" /* solid solid solid solid; */ "\n"\
61 "border-color:black;" /* black black black black; */ "\n"\
62 "border-collapse:collapse;" "\n"\
65 "border-width:1px;" /* 1px 1px 1px 1px; */ "\n"\
66 "padding:1px;" /* 1px 1px 1px 1px; */ "\n"\
67 "border-style:solid;" /* solid solid solid solid; */ "\n"\
68 "border-color:black;" /* black black black black; */ "\n"\
71 /* top right bottom left */ \
72 "border-width:0px 1px 0px 1px;" "\n"\
73 "padding:1px;" /* 1px 1px 1px 1px; */ "\n"\
74 "border-style:solid;" /* solid solid solid solid; */ "\n"\
75 "border-color:black;" /* black black black black; */ "\n"\
76 "white-space:nowrap;" "\n"\
78 "tr.hdr { background-color:#eee5de; }" "\n"\
79 "tr.o { background-color:#ffffff; }" "\n"\
80 /* tr.e { ... } - for even rows (currently none) */ \
81 "tr.foot { background-color:#eee5de; }" "\n"\
82 "th.cnt { text-align:left; }" "\n"\
83 "th.sz { text-align:right; }" "\n"\
84 "th.dt { text-align:right; }" "\n"\
85 "td.sz { text-align:right; }" "\n"\
86 "td.dt { text-align:right; }" "\n"\
87 "col.nm { width:98%; }" "\n"\
88 "col.sz { width:1%; }" "\n"\
89 "col.dt { width:1%; }" "\n"\
92 typedef struct dir_list_t {
99 static int compare_dl(dir_list_t
*a
, dir_list_t
*b
)
101 /* ".." is 'less than' any other dir entry */
102 if (strcmp(a
->dl_name
, "..") == 0) {
105 if (strcmp(b
->dl_name
, "..") == 0) {
108 if (S_ISDIR(a
->dl_mode
) != S_ISDIR(b
->dl_mode
)) {
109 /* 1 if b is a dir (and thus a is 'after' b, a > b),
111 return (S_ISDIR(b
->dl_mode
) != 0) ? 1 : -1;
113 return strcmp(a
->dl_name
, b
->dl_name
);
116 static char buffer
[2*1024 > sizeof(STYLE_STR
) ? 2*1024 : sizeof(STYLE_STR
)];
117 static char *dst
= buffer
;
119 BUFFER_SIZE
= sizeof(buffer
),
123 /* After this call, you have at least size + HEADROOM bytes available
125 static void guarantee(int size
)
127 if (buffer
+ (BUFFER_SIZE
-HEADROOM
) - dst
>= size
)
129 write(STDOUT_FILENO
, buffer
, dst
- buffer
);
133 /* NB: formatters do not store terminating NUL! */
135 /* HEADROOM bytes are available after dst after this call */
136 static void fmt_str(/*char *dst,*/ const char *src
)
138 unsigned len
= strlen(src
);
140 memcpy(dst
, src
, len
);
144 /* HEADROOM bytes after dst are available after this call */
145 static void fmt_url(/*char *dst,*/ const char *name
)
148 unsigned c
= *name
++;
151 if ((c
- '0') > 9 /* not a digit */
152 && ((c
|0x20) - 'a') > ('z' - 'a') /* not A-Z or a-z */
153 && !strchr("._-+@", c
)
156 *dst
++ = "0123456789ABCDEF"[c
>> 4];
157 *dst
= "0123456789ABCDEF"[c
& 0xf];
163 /* HEADROOM bytes are available after dst after this call */
164 static void fmt_html(/*char *dst,*/ const char *name
)
182 /* HEADROOM bytes are available after dst after this call */
183 static void fmt_ull(/*char *dst,*/ unsigned long long n
)
185 char buf
[sizeof(n
)*3 + 2];
188 p
= buf
+ sizeof(buf
) - 1;
191 *--p
= (n
% 10) + '0';
197 /* Does not call guarantee - eats into headroom instead */
198 static void fmt_02u(/*char *dst,*/ unsigned n
)
200 /* n %= 100; - not needed, callers don't pass big n */
201 dst
[0] = (n
/ 10) + '0';
202 dst
[1] = (n
% 10) + '0';
206 /* Does not call guarantee - eats into headroom instead */
207 static void fmt_04u(/*char *dst,*/ unsigned n
)
209 /* n %= 10000; - not needed, callers don't pass big n */
214 int main(int argc
, char *argv
[])
216 dir_list_t
*dir_list
;
218 unsigned dir_list_count
;
220 unsigned count_files
;
221 unsigned long long size_total
;
226 location
= getenv("REQUEST_URI");
230 /* drop URL arguments if any */
231 strchrnul(location
, '?')[0] = '\0';
233 if (location
[0] != '/'
234 || strstr(location
, "//")
235 || strstr(location
, "/../")
236 || strcmp(strrchr(location
, '/'), "/..") == 0
242 || (location
[1] && chdir(location
+ 1))
259 if (dp
->d_name
[0] == '.' && !dp
->d_name
[1])
261 if (stat(dp
->d_name
, &sb
) != 0)
263 dir_list
= realloc(dir_list
, (dir_list_count
+ 1) * sizeof(dir_list
[0]));
264 dir_list
[dir_list_count
].dl_name
= strdup(dp
->d_name
);
265 dir_list
[dir_list_count
].dl_mode
= sb
.st_mode
;
266 dir_list
[dir_list_count
].dl_size
= sb
.st_size
;
267 dir_list
[dir_list_count
].dl_mtime
= sb
.st_mtime
;
272 qsort(dir_list
, dir_list_count
, sizeof(dir_list
[0]), (void*)compare_dl
);
275 "" /* Additional headers (currently none) */
276 "\r\n" /* Mandatory empty line after headers */
277 "<html><head><title>Index of ");
278 /* Guard against directories with &, > etc */
290 "<col class=nm><col class=sz><col class=dt>" "\n"
291 "<tr class=hdr><th class=cnt>Name<th class=sz>Size<th class=dt>Last modified" "\n");
298 while (dir_list_count
--) {
301 if (S_ISDIR(cdir
->dl_mode
)) {
303 } else if (S_ISREG(cdir
->dl_mode
)) {
305 size_total
+= cdir
->dl_size
;
309 fmt_str("<tr class=");
310 *dst
++ = (odd
? 'o' : 'e');
311 fmt_str("><td class=nm><a href='");
312 fmt_url(cdir
->dl_name
); /* %20 etc */
313 if (S_ISDIR(cdir
->dl_mode
))
316 fmt_html(cdir
->dl_name
); /* < etc */
317 if (S_ISDIR(cdir
->dl_mode
))
319 fmt_str("</a><td class=sz>");
320 if (S_ISREG(cdir
->dl_mode
))
321 fmt_ull(cdir
->dl_size
);
322 fmt_str("<td class=dt>");
323 ptm
= gmtime(&cdir
->dl_mtime
);
324 fmt_04u(1900 + ptm
->tm_year
); *dst
++ = '-';
325 fmt_02u(ptm
->tm_mon
+ 1); *dst
++ = '-';
326 fmt_02u(ptm
->tm_mday
); *dst
++ = ' ';
327 fmt_02u(ptm
->tm_hour
); *dst
++ = ':';
328 fmt_02u(ptm
->tm_min
); *dst
++ = ':';
329 fmt_02u(ptm
->tm_sec
);
337 fmt_str("<tr class=foot><th class=cnt>Files: ");
338 fmt_ull(count_files
);
339 /* count_dirs - 1: we don't want to count ".." */
340 fmt_str(", directories: ");
341 fmt_ull(count_dirs
- 1);
342 fmt_str("<th class=sz>");
344 fmt_str("<th class=dt>\n");
345 /* "</table></body></html>" - why bother? */
346 guarantee(BUFFER_SIZE
* 2); /* flush */