本文整理汇总了C++中err_sys函数的典型用法代码示例。如果您正苦于以下问题：C++ err_sys函数的具体用法？C++ err_sys怎么用？C++ err_sys使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了err_sys函数的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: main
int main(void)
{
int n, fd1[2], fd2[2];
pid_t pid;
char line[MAXLINE];
// 创建信号,用于接受SIGPIPE信号,用自定义sig_pipe()函数进行处理.
if (signal(SIGPIPE, sig_pipe) == SIG_ERR) {
err_sys("signal error");
}
// 创建两个管道
if (pipe(fd1) < 0 || pipe(fd2) < 0) {
err_sys("pipe error");
}
// 创建子进程
if ((pid = fork()) < 0) {
err_sys("fork error");
} else if (pid > 0) { // 父进程
close(fd1[0]);
close(fd2[1]);
while (fgets(line, MAXLINE, stdin) != NULL) { // 从标准输入读取数据写入到fd1管道
n = strlen(line);
if (write(fd1[1], line, n) != n) {
err_sys("write error to pipe");
}
if ((n = read(fd2[0], line, MAXLINE)) < 0) { // 从fd2管道读取结果
err_sys("read error from pipe");
}
if (n == 0) {
err_msg("child closed pipe");
break;
}
line[n] = 0;
if (fputs(line, stdout) == EOF) {
err_sys("fputs error");
}
}
if (ferror(stdin)) {
err_sys("fgets error on stdin");
}
exit(0);
} else { // 子进程
close(fd1[1]);
close(fd2[0]);
if (fd1[0] != STDIN_FILENO) {
if (dup2(fd1[0], STDIN_FILENO) != STDIN_FILENO) {
err_sys("dup2 error to stdin");
}
close(fd1[0]);
}
if (fd2[1] != STDOUT_FILENO) {
if (dup2(fd2[1], STDOUT_FILENO) != STDOUT_FILENO) {
err_sys("dup2 error to stdout");
}
close(fd2[1]);
}
if (execl("./add2", "add2", (char *)0) < 0) { // 执行过滤程序
err_sys("execl error");
}
}
exit(0);
}示例2: Bind
void
Bind(int fd, const struct sockaddr *sa, socklen_t salen)
{
if (bind(fd, sa, salen) < 0)
err_sys("bind error");
}示例3: Getsockname
void
Getsockname(int fd, struct sockaddr *sa, socklen_t *salenptr)
{
if (getsockname(fd, sa, salenptr) < 0)
err_sys("getsockname error");
}示例4: get_ifi_info
struct ifi_info *
get_ifi_info(int family, int doaliases)
{
struct ifi_info *ifi, *ifihead, **ifipnext;
int sockfd, len, lastlen, flags, myflags, idx = 0, hlen = 0;
char *ptr, *buf, lastname[IFNAMSIZ], *cptr, *haddr, *sdlname;
struct ifconf ifc;
struct ifreq *ifr, ifrcopy;
struct sockaddr_in *sinptr;
struct sockaddr_in6 *sin6ptr;
int bufsz;
sockfd = Socket(AF_INET, SOCK_DGRAM, 0);
lastlen = 0;
if (ioctl(sockfd, SIOCGIFIFNUM, &bufsz) > 0) {
len = bufsz;
} else {
len = 100 * sizeof(struct ifreq); /* initial buffer size guess */
}
for ( ; ; ) {
buf = Malloc(len);
ifc.ifc_len = len;
ifc.ifc_buf = buf;
if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
if (errno != EINVAL || lastlen != 0)
err_sys("ioctl error");
} else {
if (ifc.ifc_len == lastlen)
break; /* success, len has not changed */
lastlen = ifc.ifc_len;
}
len += 10 * sizeof(struct ifreq); /* increment */
free(buf);
}
ifihead = NULL;
ifipnext = &ifihead;
lastname[0] = 0;
sdlname = NULL;
/* end get_ifi_info1 */
/* include get_ifi_info2 */
for (ptr = buf; ptr < buf + ifc.ifc_len; ) {
ifr = (struct ifreq *) ptr;
#ifdef HAVE_SOCKADDR_SA_LEN
len = max(sizeof(struct sockaddr), ifr->ifr_addr.sa_len);
#else
switch (ifr->ifr_addr.sa_family) {
#ifdef IPV6
case AF_INET6:
len = sizeof(struct sockaddr_in6);
break;
#endif
case AF_INET:
default:
len = sizeof(struct sockaddr);
break;
}
#endif /* HAVE_SOCKADDR_SA_LEN */
ptr += sizeof(ifr->ifr_name) + len; /* for next one in buffer */
#ifdef HAVE_SOCKADDR_DL_STRUCT
/* assumes that AF_LINK precedes AF_INET or AF_INET6 */
if (ifr->ifr_addr.sa_family == AF_LINK) {
struct sockaddr_dl *sdl = (struct sockaddr_dl *)&ifr->ifr_addr;
sdlname = ifr->ifr_name;
idx = sdl->sdl_index;
haddr = sdl->sdl_data + sdl->sdl_nlen;
hlen = sdl->sdl_alen;
}
#endif
if (ifr->ifr_addr.sa_family != family)
continue; /* ignore if not desired address family */
myflags = 0;
if ( (cptr = strchr(ifr->ifr_name, ':')) != NULL)
*cptr = 0; /* replace colon with null */
if (strncmp(lastname, ifr->ifr_name, IFNAMSIZ) == 0) {
if (doaliases == 0)
continue; /* already processed this interface */
myflags = IFI_ALIAS;
}
memcpy(lastname, ifr->ifr_name, IFNAMSIZ);
ifrcopy = *ifr;
Ioctl(sockfd, SIOCGIFFLAGS, &ifrcopy);
flags = ifrcopy.ifr_flags;
if ((flags & IFF_UP) == 0)
continue; /* ignore if interface not up */
/* end get_ifi_info2 */
/* include get_ifi_info3 */
ifi = Calloc(1, sizeof(struct ifi_info));
*ifipnext = ifi; /* prev points to this new one */
ifipnext = &ifi->ifi_next; /* pointer to next one goes here */
ifi->ifi_flags = flags; /* IFF_xxx values */
//.........这里部分代码省略.........
示例5: Send
void
Send(int fd, const void *ptr, size_t nbytes, int flags)
{
if (send(fd, ptr, nbytes, flags) != (ssize_t)nbytes)
err_sys("send error");
}示例6: Shutdown
void
Shutdown(int fd, int how)
{
if (shutdown(fd, how) < 0)
err_sys("shutdown error");
}示例7: Connect
void
Connect(int fd, const struct sockaddr *sa, socklen_t salen)
{
if ( connect( fd, sa, salen) < 0)
err_sys( "connect error");
}示例8: main
int
main ( int argc, char *argv[] )
{
struct stat struct_stat;
pthread_t pid;
pthread_attr_t attr;
int i, num_sources;
uid_t gmetad_uid;
mode_t rrd_umask;
char * gmetad_username;
struct passwd *pw;
char hostname[HOSTNAMESZ];
gmetad_config_t *c = &gmetad_config;
apr_interval_time_t sleep_time;
apr_time_t last_metadata;
double random_sleep_factor;
unsigned int rand_seed;
/* Ignore SIGPIPE */
signal( SIGPIPE, SIG_IGN );
if (cmdline_parser(argc, argv, &args_info) != 0)
err_quit("command-line parser error");
num_sources = number_of_datasources( args_info.conf_arg );
if(!num_sources)
{
err_quit("%s doesn't have any data sources specified", args_info.conf_arg);
}
memset(&root, 0, sizeof(root));
root.id = ROOT_NODE;
/* Get the real number of data sources later */
sources = hash_create( num_sources + 10 );
if (! sources )
{
err_quit("Unable to create sources hash\n");
}
root.authority = hash_create( num_sources + 10 );
if (!root.authority)
{
err_quit("Unable to create root authority (our grids and clusters) hash\n");
}
root.metric_summary = hash_create (DEFAULT_METRICSIZE);
if (!root.metric_summary)
{
err_quit("Unable to create root summary hash");
}
parse_config_file ( args_info.conf_arg );
/* If given, use command line directives over config file ones. */
if (args_info.debug_given)
{
c->debug_level = args_info.debug_arg;
}
debug_level = c->debug_level;
set_debug_msg_level(debug_level);
/* Setup our default authority pointer if the conf file hasnt yet.
* Done in the style of hash node strings. */
if (!root.stringslen)
{
gethostname(hostname, HOSTNAMESZ);
root.authority_ptr = 0;
sprintf(root.strings, "http://%s/ganglia/", hostname);
root.stringslen += strlen(root.strings) + 1;
}
rand_seed = apr_time_now() * (int)pthread_self();
for(i = 0; i < root.stringslen; rand_seed = rand_seed * root.strings[i++]);
/* Debug level 1 is error output only, and no daemonizing. */
if (!debug_level)
{
rrd_umask = c->umask;
daemon_init (argv[0], 0, rrd_umask);
}
if (args_info.pid_file_given)
{
update_pidfile (args_info.pid_file_arg);
}
/* The rrd_rootdir must be writable by the gmetad process */
if( c->should_setuid )
{
if(! (pw = getpwnam(c->setuid_username)))
{
err_sys("Getpwnam error");
}
gmetad_uid = pw->pw_uid;
gmetad_username = c->setuid_username;
}
else
{
gmetad_uid = getuid();
if(! (pw = getpwuid(gmetad_uid)))
//.........这里部分代码省略.........
示例9: main
int main(int argc, char **argv)
{
int i, maxi, listenfd, connfd, sockfd;
int nready;
ssize_t n;
char buf[MAXLINE];
socklen_t clilen;
struct pollfd client[OPEN_MAX];
struct sockaddr_in cliaddr, servaddr;
listenfd = Socket(AF_INET, SOCK_STREAM, 0);
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(SERV_PORT);
Bind(listenfd, (SA *)&servaddr, sizeof(servaddr));
Listen(listenfd, LISTENQ);
client[0].fd = listenfd;
client[0].events = POLLIN;
for (i = 1; i < OPEN_MAX; i++)
client[1].fd = -1;
maxi = 0;
for ( ; ; )
{
nready = Poll(client, maxi + 1, INFTIM);
if (client[0].revents & POLLIN) /* new client connection */
{
clilen = sizeof(cliaddr);
connfd = Accept(listenfd, (SA *)&cliaddr, &clilen);
for (i = 1; i < OPEN_MAX; i++)
if (client[i].fd < 0)
{
client[i].fd = connfd; /* save descriptor */
break;
}
if (i == OPEN_MAX)
err_quit("too many clients");
client[i].events = POLLIN;
if (i > maxi)
maxi = i; /* max index in client[] array */
if (--nready <= 0)
continue; /* no more readable descriptors */
}
for (i = 1; i <= maxi; i++) /* check all clients for data */
{
if ((sockfd = client[i].fd) < 0)
continue;
if (client[i].revents & (POLLIN | POLLERR))
{
if ((n = read(sockfd, buf, MAXLINE)) < 0)
{
if (errno == ECONNRESET) /* connection reset by client */
{
Close(sockfd);
client[i].fd = -1;
}
else
err_sys("read error");
}
else if (n == 0) /* connection closed by client */
{
Close(sockfd);
client[i].fd = -1;
}
else
Writen(sockfd, buf, n);
if (--nready <= 0) /* no more readable descriptors */
break;
}
}
}
}示例10: main
int
main(void)
{
int fd1[2], fd2[2];
pid_t pid;
char line[MAXLINE];
FILE *infp, *outfp;
if (signal(SIGPIPE, sig_pipe) == SIG_ERR)
err_sys("signal error");
if (pipe(fd1) < 0 || pipe(fd2) < 0)
err_sys("pipe error");
if ((pid = fork()) < 0) {
err_sys("fork error");
} else if (pid > 0) { /* parent */
close(fd1[IN]), close(fd2[OUT]);
if (((infp = fdopen(fd2[IN], "r")) == NULL) ||
((outfp = fdopen(fd1[OUT], "w")) == NULL))
err_sys("fdopen error");
if ((setvbuf(infp, NULL, _IOLBF, 0) != 0) ||
(setvbuf(outfp, NULL, _IOLBF, 0) != 0))
err_sys("setvbuf error");
while (fgets(line, MAXLINE, stdin) != NULL) {
if (fputs(line, outfp) == EOF)
err_sys("fputs error");
if (fgets(line, MAXLINE, infp) == NULL) {
if (ferror(infp) != 0)
err_sys("fgets error");
else
err_msg("child closed pipe");
}
if (fputs(line, stdout) == EOF)
err_sys("fputs error");
}
Fclose(infp);
Fclose(outfp);
if (ferror(stdin))
err_sys("fgets error on stdin");
exit(0);
} else { /* child */
close(fd1[OUT]);
close(fd2[IN]);
if (fd1[IN] != STDIN_FILENO) {
if (dup2(fd1[IN], STDIN_FILENO) != STDIN_FILENO)
err_sys("dup2 error to stdin");
close(fd1[IN]);
}
if (fd2[OUT] != STDOUT_FILENO) {
if (dup2(fd2[OUT], STDOUT_FILENO) != STDOUT_FILENO)
err_sys("dup2 error to stdout");
close(fd2[OUT]);
}
if (execl("./add2", "add2", (char *)0))
err_sys("execl error");
}
exit(0);
}示例11: init_fpga_task
static int
init_fpga_task(void)
{
int j, i;
int ans;
static int firsttime = TRUE;
//enter code
/* get home path */
homePath= getenv ("HOME");
//////////////////////////////////////////////////////////////////////////
// Create a MMAP
//////////////////////////////////////////////////////////////////////////
#ifdef WIN32
/*// Create a 4K memory-mapped file (MMF)
hFile = CreateFile((LPCTSTR) "input.dat",
GENERIC_WRITE | GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if(hFile == INVALID_HANDLE_VALUE)
{
// Failed to create file
return 1;
}
map = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 1024, "MMAPShmem");
g_fpga2robot = (char *) MapViewOfFile (map, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, 0);
*/
#else
printf("buffer_size: %d\n\n", statbuf.st_size);
int fd_i;
char* fgpa2robot_FilePath;
fgpa2robot_FilePath = strncat(homePath, "/prog/masterUser/src/fpga2robot.dat", 100); //max number of characers to be concatinated :100
if((fd_i = open(fgpa2robot_FilePath, O_RDWR)) == -1)
{
printf("Couldn't open 'fpga2robot.dat'\n");
}
g_fpga2robot = mmap(NULL, 1024, PROT_READ | PROT_WRITE, MAP_SHARED, fd_i, 0);
if (g_fpga2robot == MAP_FAILED) {
close(fd_i);
perror("Error mmapping the file");
exit(EXIT_FAILURE);
}
int fd_o;
if((fd_o = open("/home/eric/prog/masterUser/src/robot2fpga.dat", O_RDWR)) == -1)
{
printf("Couldn't open 'robot2fpga.dat'\n");
}
lseek(fd_o, 0, SEEK_SET);
g_robot2fpga = mmap(NULL, 1024, PROT_READ | PROT_WRITE, MAP_SHARED, fd_o, 0);
if (g_robot2fpga == MAP_FAILED) {
close(fd_o);
perror("Error mmapping the file");
exit(EXIT_FAILURE);
}
#endif
if(g_fpga2robot != NULL)
{
printf("Wrapper has created a MMAP for file 'fpga2robot.dat'\n");
}
if(g_robot2fpga != NULL)
{
printf("Wrapper has created a MMAP for file 'robot2fpga.dat'\n");
}
/* find size of input file */
if (fstat (fd_i, &statbuf) < 0)
err_sys ("fstat error");
system("/home/eric/prog/masterUser/src/py/py_mmap.py &");
//end code
if (firsttime){
firsttime = FALSE;
freq = 0.1; // frequency
amp = 0.5; // amplitude
}
// prepare going to the default posture
bzero((char *)&(target[1]),N_DOFS*sizeof(target[1]));
for (i=1; i<=N_DOFS; i++)
//.........这里部分代码省略.........
示例12: main
int main(int argc, char argv**)
{
socklen_t len;
int n, listenfd, connfd, char_in, count = 0;
struct sockaddr_in servaddr, cliaddr;
char buff[40], wbuff[MAXLINE], rbuff[MAXLINE], cmd[16], path1[64]=".", path[64], vers[16];
FILE * hFile;
if(argc != 2)
{
err_quit("usage: a.out <Port>");
}
listenfd = Socket(AF_INET, SOCK_STREAM, 0);
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.sin_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(atoi(argv[1]));
Bind(listenfd, (SA*) &servaddr, sizeof(servaddr));
Listen(listenfd, LISTENQ);
for( ; ; )
{
len = sizeof(cliaddr);
connfd = Accept(listenfd, (SA*) &cliaddr, &len);
printf("\nConnection from %s, port %d\n", Inet_ntop(AF_INET, &cliaddr.sin_addr, buff, sizeof(buff)) ntohs(cliaddr.sin_port));
while((n = read(connfd, rbuff, MAXLINE)) > 0)
{
rbuff[n] = 0;
if(fputs(rbuff, stdout) == 0)
{
err_sys("fputs error");
}
if(strstr(rbuff,"\r\n\r\n") > 0)
{
break;
}
}
if(n < 0)
{
err_sys("read error");
}
sscanf(rbuff, "%s %s %s", cmd, path, vers);
strcat(path1, path);
if(strcmp(path1, "./") == 0)
{
strcpy(path1, "./index.html");
}
hFile = fopen(path1, "r");
if(hFile == NULL)
{
hFIle = fopen("error.html", "r");
}
strcpy(wbuff,"");
while((char_in = fgetc(hFile)) != EOF)
{
wbuff(count) = char_in;
count++;
}
wbuff(count) = 0;
Write(connfd, wbuff, strlen(wbuff));
count = 0;
fclose(hFile);
strcpy(path1,".");
Close(connfd);
}
}示例13: main
int main(int argc, char const *argv[])
{
char line[MAXLINE];
FILE *fpout, *fpin;
if((fpout = popen("./kbfilter", "w")) == NULL)
err_sys("popen error");
//if((fpin = popen("./kbfilter", "r")) == NULL)
// err_sys("popen error");
struct termios termios_struct;
tcgetattr(STDIN_FILENO, &orig_termios_struct);
tcgetattr(STDIN_FILENO, &termios_struct);
// could be done like this also:
// termios_struct = orig_termios_struct;
termios_struct.c_lflag &= (~ICANON) & (~ECHO);
termios_struct.c_cc[VTIME] = 0;
termios_struct.c_cc[VMIN] = 1;
tcsetattr(STDIN_FILENO, TCSANOW, &termios_struct);
sleep(1);
char c[2];
//while((c = getchar()) != EOF)
while((c[0] = getc(stdin)) != EOF)
{
c[1] = 0;
//printf("%s\n", c);
if(fputs(c,fpout) == EOF)
{
tcsetattr(STDIN_FILENO, TCSANOW, &orig_termios_struct);
err_sys("fputs error to pipe");
}
}
tcsetattr(STDIN_FILENO, TCSANOW, &orig_termios_struct);
if (ferror(fpout))
//||ferror(fpin))
err_sys("fputs error to pipe");
if(pclose(fpout) == -1)
err_sys("pclose fpout error");
//if(pclose(fpin) == -1)
// err_sys("pclose fpin error");
/*
if((fpin = popen("./kbfilter", "r")) == NULL)
err_sys("popen error");
for(;;)
{
//fputs("prompt> ", stdout);
//fflush(stdout);
if(fgets(line, MAXLINE, fpin) == NULL) // read from pipe
break;
if(fputs(line, stdout) == EOF)
err_sys("fputs error to pipe");
}
if(pclose(fpin) == -1)
err_sys("pclose error");
// tcsetattr(STDIN_FILENO, TCSANOW, &orig_termios_struct);
*/
putchar('\n');
exit(0);
}示例14: receive_cmd
//.........这里部分代码省略.........
int close_fd_errout = 1;
if (i + 1 < cmdc) {
// If there's next command
Pipe(in_out_pipe);
fd_out = in_out_pipe[1];
fd_errout = in_out_pipe[1];
} else {
// This is last one
fd_out = sockfd;
fd_errout = sockfd;
int minus = 0;
for (int q = 0; q < argc; q++) {
if (strcmp(argv[q], ">") == 0) {
fd_out = open(argv[q + 1], O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
argv[q] = '\0';
argc = q;
break;
} else if (argv[q][0] == '|' && argv[q][1] != '!') {
int dest_pipe = parse_number(&argv[q][1]) + line;
printf("dest_pipe std = %d\n", dest_pipe);
if (pipes[dest_pipe][1] == -1)
Pipe(pipes[dest_pipe]);
fd_out = pipes[dest_pipe][1];
close_fd_out = 0;
argv[q] = '\0';
minus++;
} else if (argv[q][0] == '!' && argv[q][1] != '|') {
int dest_pipe = parse_number(&argv[q][1]) + line;
printf("dest_pipe err = %d\n", dest_pipe);
if (pipes[dest_pipe][1] == -1)
Pipe(pipes[dest_pipe]);
fd_errout = pipes[dest_pipe][1];
close_fd_errout = 0;
argv[q] = '\0';
minus++;
} else if (
(argv[q][0] == '!' && argv[q][1] == '|') ||
(argv[q][0] == '|' && argv[q][1] == '!')) {
int dest_pipe = atoi(&argv[q][2]) + line;
printf("dest_pipe std+err = %d\n", dest_pipe);
if (pipes[dest_pipe][1] == -1)
Pipe(pipes[dest_pipe]);
fd_out = pipes[dest_pipe][1];
fd_errout = pipes[dest_pipe][1];
argv[q] = '\0';
minus++;
}
}
argc -= minus;
}
printf("pipe[0]=%d\n", in_out_pipe[0]);
printf("pipe[1]=%d\n", in_out_pipe[1]);
char exit_code = fork_process(argv, fd_in, fd_out, fd_errout, sockfd);
if (close_fd_out && fd_out != sockfd && fd_out != -1)
Close(fd_out);
if (close_fd_errout && fd_errout != fd_out && fd_errout != sockfd && fd_errout != -1)
Close(fd_errout);
if (exit_code == ERR_CMD_NOT_FOUND) {
dprintf(sockfd, "Unknown command: [%s].\n", argv[0]);
unknown_command = 1;
break;
} else {
if (fd_in != -1)
Close(fd_in);
fd_in = in_out_pipe[0];
}
}
showSymbol(sockfd);
if (!unknown_command)
line++;
}
}
if (n < 0 && errno == EINTR) {
pos += n;
goto again;
}
else if (n < 0) {
err_sys("str_echo: read error");
}
}示例15: err_setout
void err_setout(int fd)
{
if (dup2(fd, STDERR_FILENO) == -1)
err_sys("liberr redirect stderr");
_err_tty = isatty(STDERR_FILENO);
}