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你好傢伙這是我的第一篇文章。移動二進制目錄外的分段錯誤
我的問題是愚蠢的，我想但我找不到任何解決方案，希望你能幫助我！因此，我和一個朋友正在編寫一個小型系統監視器（學習更好/有趣），代碼有2個部分：守護進程和命令行界面（現在），當我編譯CLI部分時， ，守護進程是特別的，因爲當我編譯時，我在編譯目錄中執行它，它的工作原理沒有錯誤！神奇的是，當我移出編譯目錄時，它給了我一個分段錯誤！
編譯器：GCC
這裏是倉庫：https://github.com/StefanoBelli/JASM
的Makefile：
#!/usr/bin/make -f
SHELL=/bin/sh
#### CONFIGURATION ####
CC=gcc
DEBUG=-g
CFLAGS=-O2 -pipe -Wall -std=c11 $(DEBUG)
LIBS=
BINOUT=jasm
#### SOURCES & RULES ####
OBJS:=$(patsubst %.c,%.o,$(wildcard *.c))
install:$(OBJS)
$(CC) $(CFLAGS) $(LIBS) -o $(BINOUT) $(OBJS)
clean:
rm -fv *.o
.PHONY: install,clean
GDB輸出：
(gdb) run
Starting program: /home/stefanozzz123/Devel/C.Cpp/JASM/bin/jasm
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7a7db04 in vfprintf() from /usr/lib/libc.so.6
(gdb)
感謝所有你們的！ :)
編輯：根據你的要求這裏是代碼：
jasm.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "queue.h"
#include "miscellaneous.h"
#include "ipc.h"
int main(int argc, char *argv[])
{
start_daemon();
start_server();
}
ipc.c
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <string.h>
#include <netinet/in.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include "ipc.h"
#include "miscellaneous.h"
#include "getter.h"
static void excecute_command(int fd, char *command)
{
/*
* if get* -> modulo get
* if start* -> modulo dei moduli
*/
// ************************** getter ***************************************
if(strncmp("get", command, 3)==0) { //ricevuto comando getter
int i;
//char buf[BUFSIZ];
strcpy(command, &command[3]);
for(i=0; i<NGETTER; i++) {
if(strcmp(getterName[i], command)==0) { //se esiste getter
log_string("getter found :)");
getterFunction[i](fd);
return;
}
}
log_error("getter NOT found :(");
write(fd, "null\0", 4);
return;
}
// ************************** starter **************************************
if(strncmp("start", command, 5)==0) { //ricevuto start modulo
log_error("starter NOT found :(");
write(fd, "null\0", 4);
return;
}
// ************************** miscellaneous ********************************
if(strcmp("halt", command)==0) { //spegne jasm
log_string("# halt and catch fire, done");
write(fd, "halt\0", 4);
exit(0);
}
/*if(strcmp("getVersion", command)==0) {
write(fd, (void *)VERSION, sizeof(VERSION));
log_string("server reply <version> with success");
return;
}*/
log_error("request not found");
write(fd, "null\0", 4);
}
void start_server()
{
int server_sockfd, client_sockfd;
int server_len;
socklen_t client_len;
struct sockaddr_in server_address;
struct sockaddr_in client_address;
int result;
fd_set readfds, testfds;
server_sockfd=socket(AF_INET, SOCK_STREAM, 0);
server_address.sin_family=AF_INET;
server_address.sin_addr.s_addr=htonl(INADDR_ANY);
server_address.sin_port=htons(SERVER_PORT);
server_len=sizeof(server_address);
bind(server_sockfd, (struct sockaddr *)&server_address, server_len);
listen(server_sockfd, 5);
FD_ZERO(&readfds);
FD_SET(server_sockfd, &readfds);
log_string("server started");
while(1) {
char buf[BUFSIZ];
char received[BUFSIZ];
int fd;
int nread;
testfds=readfds;
result=select(FD_SETSIZE, &testfds, (fd_set *)0, (fd_set *)0, (struct timeval *)0);
if(result<1) {
log_error("server fail");
exit(1);
}
for(fd=0; fd<FD_SETSIZE; fd++) {
if(FD_ISSET(fd, &testfds)) {
if(fd==server_sockfd) {
client_len=sizeof(client_address);
client_sockfd=accept(server_sockfd, (struct sockaddr *)&client_address, &client_len);
FD_SET(client_sockfd, &readfds);
sprintf(buf, "adding client on fd %d", client_sockfd);
log_string(buf);
} else {
ioctl(fd, FIONREAD, &nread);
if(nread==0) {
close(fd);
FD_CLR(fd, &readfds);
sprintf(buf, "removing client on fd %d", fd);
log_string(buf);
} else {
read(fd, &received, BUFSIZ);
sprintf(buf, "received from fd %d command <%s>", fd, received);
log_string(buf);
excecute_command(fd, received);
}
}
}
}
}
}
miscellanous.c
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "miscellaneous.h"
char * getTime()
{
time_t curtime;
struct tm *loctime;
static char *ret;
curtime=time(NULL);
loctime=localtime(&curtime);
ret=asctime(loctime);
ret[24]='\0';
return ret;
}
void log_string(const char *message)
{
FILE *fp;
fp=fopen(LOGPATH, "a+");
fprintf(fp, "[%s] %s\n", getTime(), message);
fclose(fp);
}
void log_error(const char *message)
{
FILE *fp;
fp=fopen(LOGPATH, "a+");
fprintf(fp, "[%s] ERROR: %s!\n", getTime(), message);
fclose(fp);
}
void start_daemon()
{
pid_t pid;
char buf[BUFSIZ];
log_string("boot");
pid=fork();
switch(pid) {
case -1:
log_error("fork fail");
exit(1);
break;
case 0:
log_string("fork success");
break;
default:
exit(0);
break;
}
if(setsid()<0) {
log_error("setsid fail");
exit(1);
} else {
log_string("setsid success");
}
//chiude i file descriptor di stdin, stdout, stderr
close(0);
close(1);
close(2);
sprintf(buf, "jasm started with pid %d and ppid %d", getpid(), getppid());
log_string(buf);
}
本質這些是主要的srcs ...
GDB回溯什麼都不說的程序運行立即
顯示代碼，通過gdb運行以獲取更多信息。 –
gdb的「backtrace」命令告訴你什麼？ – alk
不要只提供鏈接，但發佈[mcve]。 – Olaf