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lighttpd2/src/utils.c

171 lines
3.3 KiB

#include "utils.h"
#include <stdio.h>
#include <stdlib.h>
void fatal(const gchar* msg) {
fprintf(stderr, "%s\n", msg);
abort();
}
void fd_init(int fd) {
#ifdef _WIN32
int i = 1;
#endif
#ifdef FD_CLOEXEC
/* close fd on exec (cgi) */
fcntl(fd, F_SETFD, FD_CLOEXEC);
#endif
#ifdef O_NONBLOCK
fcntl(fd, F_SETFL, O_NONBLOCK | O_RDWR);
#elif defined _WIN32
ioctlsocket(fd, FIONBIO, &i);
#endif
}
void ev_io_add_events(struct ev_loop *loop, ev_io *watcher, int events) {
if ((watcher->events & events) == events) return;
ev_io_stop(loop, watcher);
ev_io_set(watcher, watcher->fd, watcher->events | events);
ev_io_start(loop, watcher);
}
void ev_io_rem_events(struct ev_loop *loop, ev_io *watcher, int events) {
if (0 == (watcher->events & events)) return;
ev_io_stop(loop, watcher);
ev_io_set(watcher, watcher->fd, watcher->events & ~events);
ev_io_start(loop, watcher);
}
void ev_io_set_events(struct ev_loop *loop, ev_io *watcher, int events) {
if (events == (watcher->events & (EV_READ | EV_WRITE))) return;
ev_io_stop(loop, watcher);
ev_io_set(watcher, watcher->fd, (watcher->events & ~(EV_READ | EV_WRITE)) | events);
ev_io_start(loop, watcher);
}
/* converts hex char (0-9, A-Z, a-z) to decimal.
* returns -1 on invalid input.
*/
static int hex2int(unsigned char hex) {
int res;
if (hex >= 'A') { /* 'A' < 'a': hex >= 'A' --> hex >= 'a' */
if (hex >= 'a') {
res = hex - 'a' + 10;
} else {
res = hex - 'A' + 10;
}
} else {
res = hex - '0';
}
if (res > 15)
res = -1;
return res;
}
void url_decode(GString *path) {
char *src, *dst, c;
src = dst = path->str;
for ( ; *src; src++) {
c = *src;
if (c == '%') {
if (src[1] && src[2]) {
int a = hex2int(src[1]), b = hex2int(src[2]);
if (a != -1 && b != -1) {
c = (a << 4) | b;
if (c < 32 || c == 127) c = '_';
*(dst++) = c;
}
src += 2;
} else {
/* end of string */
return;
}
} else {
if (c < 32 || c == 127) c = '_';
*(dst++) = c;
}
}
g_string_set_size(path, dst - path->str);
}
/* Remove "/../", "//", "/./" parts from path.
*
* /blah/.. gets /
* /blah/../foo gets /foo
* /abc/./xyz gets /abc/xyz
* /abc//xyz gets /abc/xyz
*
* NOTE: src and dest can point to the same buffer, in which case
* the operation is performed in-place.
*/
void path_simplify(GString *path) {
int toklen;
char c, pre1;
char *start, *slash, *walk, *out;
unsigned short pre;
if (path == NULL)
return;
walk = start = out = slash = path->str;
while (*walk == ' ') {
walk++;
}
pre1 = *(walk++);
c = *(walk++);
pre = pre1;
if (pre1 != '/') {
pre = ('/' << 8) | pre1;
*(out++) = '/';
}
*(out++) = pre1;
if (pre1 == '\0') {
g_string_set_size(path, out - start);
return;
}
while (1) {
if (c == '/' || c == '\0') {
toklen = out - slash;
if (toklen == 3 && pre == (('.' << 8) | '.')) {
out = slash;
if (out > start) {
out--;
while (out > start && *out != '/') {
out--;
}
}
if (c == '\0')
out++;
} else if (toklen == 1 || pre == (('/' << 8) | '.')) {
out = slash;
if (c == '\0')
out++;
}
slash = out;
}
if (c == '\0')
break;
pre1 = c;
pre = (pre << 8) | pre1;
c = *walk;
*out = pre1;
out++;
walk++;
}
g_string_set_size(path, out - start);
}