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