課程名稱︰系統程式 課程性質︰系必修 課程教師︰施吉昇 開課學院：電資學院 開課系所︰資工系 考試日期（年月日）︰2010.6.23 考試時限（分鐘）：180 是否需發放獎勵金：是 （如未明確表示，則不予發放） 試題 : Final exam for Spring 2010, System Programming -------------------------------------------------------------------------- -------------------------------------------------------------------------- Some function prototypes you may need: int setjmp(jmp_buf env); void longjmp(jmp_buf env, int val); int sigemptyset(sigset_t *set); int sigfillset(sigset_t *set); int sigaddset(sigset_t *set, int signo); int sigdelset(sigset_t *set, int signo); int sigprocmask(int how, const sigset_t *set, sigset_t *oset); how:SIG_BLOCK, SIG_UNBLOCK, SIG_SETMASK int sigpending(sigset_t *set); int sigaction(int signo, const struct sigaction *act , struct sigaction *oact); struct sigaction{ void (*sa_handler)(int); //func addr, SIG_IGN, or SIG_DFL sigset_t sa_mask; //additional signals to block int sa_flags; //just set it to be SA_INTERRUPT void(*sa_sigaction)(int,siginfo_t*, void *);//alternate handler }; int sigsuspend(const sigset_t *sigmask); int pipe(int filedes[2]); pid_t fork(void); int dup2(int filedes, int filedes2); int execv(const char *pathname, char *const argv[]); pid_t wait(int *statloc); void(*signal(int signo, void (*func)(int)))(int); unsigned int alarm(unsigned int seconds); ------------------------------------------------------------------------------ Page 12 of 12 Mid-term exam for Spring 2010, System Programming ------------------------------------------------------------------------------ char *fgets(char *s, int n, FILE *stream); FILE *fopen(const char*file, const char *mode); int open(const char *file, const char *mode); int close(int fd); ssize_t read(int filedes, coid *buf, size_t nbytes); ssize_t write(int filedes, const void *buf, size_t nbytes); int fclose(FILE *stream); int fflush(FILE *stream); int fileno(FILE *stream); char *tmpnam(char *ptr); FILE *tmpfile(void); int dup(int filedes); int fup2(int filedes, int filedes2); int fsync(void); int fdatasync(int filedes); void sync(void); mode_t umask(mode_t cmask); int stat(const char *restrict pathname, struct stat *restrict buf); int fstat(int filedes, struct stat *buf); int lstat(const char*restrict pathname, struct stat *restrict buf); DIR *opendir(const char *pathname); struct dirent *readdir(DIR *dp); void rewinddir(DIR *dp); int closedir(DIR *dp); long telldir(DIR *dp); void seekdir(DIR *dp, long loc); closedir(dp); struct passwd *getpwent(void); void setpwent(void); void endpwent(void); struct passwd *getpwuid(uid_t uid); struct passwd *getpqnam(const char *name); struct group *getgrgid(gid_t gid); struct group *getgrnam(const char *name); int link(const char *existingpath, const chat *newpath); int unlink(const char *pathname); ssize_t readlink(const char* restrict pathname, char *restrict buf, size_t bufsize); int symlink(const char *actralpath, const char *sympath); struct dirent{ ino_t d_ino; /* i-node number */ char d_name[NAME_MAX+1]; /* null-terminated filename */ } struct stat{ mode_t st_mode; /* file type & mode(permissions) */ ino_t st_ino; /* i-node number(serial number) */ dev_t st_dev; /* device number(file system) */ ----------------------------------------------------------------------------- Page 10 of 11 ----------------------------------------------------------------------------- dev_t st_rdev; /* device number for special files */ nlink_t st_nlink; /* number of links */ uid_t st_uid; /* user ID of owner */ gid_t st_gid; /* group ID of owner */ off_t st_size; /* size in bytes, for regular files */ time_t st_atime; /* time of last access */ time_t st_mtine; /* time of last modification */ time_t st_ctime; /* time of last file status change */ blksize_t st_blksize; /* best I/O block size */ blkcnt_t st)blocks; /* number of disk blocks allocated */ }; struct passwd{ char *pw_name; char *pw_passwd; uid_t pw)uid; gid_t pw_gid; char *pw_gecos; char *pw_dir; char *pw_shell; }; struct group{ char *gr_name; /* group name */ char *gr_passwd; /* group password */ gid_t gr_gid; /* group ID */ char **gr_mem; /* group members */ }; ------------------------------------------------------------------------------ Page 11 of 11 --

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