mirror of
https://github.com/tsl0922/ttyd.git
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125 lines
3.5 KiB
C
125 lines
3.5 KiB
C
#include <ctype.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#if defined(__linux__) && !defined(__ANDROID__)
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// https://github.com/karelzak/util-linux/blob/master/misc-utils/kill.c
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const char *sys_signame[NSIG] = {
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"zero", "HUP", "INT", "QUIT", "ILL", "TRAP", "ABRT", "UNUSED", "FPE",
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"KILL", "USR1", "SEGV", "USR2", "PIPE", "ALRM", "TERM", "STKFLT", "CHLD",
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"CONT", "STOP", "TSTP", "TTIN", "TTOU", "URG", "XCPU", "XFSZ", "VTALRM",
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"PROF", "WINCH", "IO", "PWR", "SYS", NULL};
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#endif
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#if defined(_WIN32) || defined(__CYGWIN__)
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#include <shellapi.h>
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#include <windows.h>
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// https://github.com/mirror/newlib-cygwin/blob/master/winsup/cygwin/strsig.cc
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#ifndef NSIG
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#define NSIG 33
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#endif
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const char *sys_signame[NSIG] = {
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"zero", "HUP", "INT", "QUIT", "ILL", "TRAP", "IOT", "EMT", "FPE",
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"KILL", "BUS", "SEGV", "SYS", "PIPE", "ALRM", "TERM", "URG", "STOP",
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"TSTP", "CONT", "CHLD", "TTIN", "TTOU", "IO", "XCPU", "XFSZ", "VTALRM",
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"PROF", "WINCH", "PWR", "USR1", "USR2", NULL};
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#endif
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void *xmalloc(size_t size) {
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if (size == 0) return NULL;
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void *p = malloc(size);
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if (!p) abort();
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return p;
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}
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void *xrealloc(void *p, size_t size) {
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if ((size == 0) && (p == NULL)) return NULL;
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p = realloc(p, size);
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if (!p) abort();
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return p;
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}
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char *uppercase(char *str) {
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int i = 0;
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do {
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str[i] = (char)toupper(str[i]);
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} while (str[i++] != '\0');
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return str;
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}
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bool endswith(const char *str, const char *suffix) {
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size_t str_len = strlen(str);
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size_t suffix_len = strlen(suffix);
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return str_len > suffix_len && !strcmp(str + (str_len - suffix_len), suffix);
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}
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int get_sig_name(int sig, char *buf, size_t len) {
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int n =
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snprintf(buf, len, "SIG%s", sig < NSIG ? sys_signame[sig] : "unknown");
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uppercase(buf);
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return n;
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}
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int get_sig(const char *sig_name) {
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for (int sig = 1; sig < NSIG; sig++) {
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const char *name = sys_signame[sig];
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if (name != NULL && (strcasecmp(name, sig_name) == 0 ||
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strcasecmp(name, sig_name + 3) == 0))
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return sig;
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}
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return atoi(sig_name);
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}
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bool fd_set_cloexec(const int fd) {
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int flags = fcntl(fd, F_GETFD);
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if (flags < 0) return false;
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return (flags & FD_CLOEXEC) == 0 ||
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fcntl(fd, F_SETFD, flags | FD_CLOEXEC) != -1;
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}
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int open_uri(char *uri) {
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#ifdef __APPLE__
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char command[256];
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sprintf(command, "open %s > /dev/null 2>&1", uri);
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return system(command);
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#elif defined(_WIN32) || defined(__CYGWIN__)
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return ShellExecute(0, 0, uri, 0, 0, SW_SHOW) > 32 ? 0 : 1;
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#else
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// check if X server is running
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if (system("xset -q > /dev/null 2>&1")) return 1;
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char command[256];
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sprintf(command, "xdg-open %s > /dev/null 2>&1", uri);
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return system(command);
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#endif
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}
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// https://github.com/darkk/redsocks/blob/master/base64.c
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char *base64_encode(const unsigned char *buffer, size_t length) {
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static const char b64[] =
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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char *ret, *dst;
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unsigned i_bits = 0;
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int i_shift = 0;
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int bytes_remaining = (int)length;
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ret = dst = xmalloc((size_t)(((length + 2) / 3 * 4) + 1));
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while (bytes_remaining) {
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i_bits = (i_bits << 8) + *buffer++;
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bytes_remaining--;
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i_shift += 8;
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do {
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*dst++ = b64[(i_bits << 6 >> i_shift) & 0x3f];
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i_shift -= 6;
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} while (i_shift > 6 || (bytes_remaining == 0 && i_shift > 0));
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}
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while ((dst - ret) & 3) *dst++ = '=';
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*dst = '\0';
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return ret;
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}
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