feat: part 2 complete

.gitignore

@@ -1,55 +0,0 @@
-# Prerequisites
-*.d
-
-# Object files
-*.o
-*.ko
-*.obj
-*.elf
-
-# Linker output
-*.ilk
-*.map
-*.exp
-
-# Precompiled Headers
-*.gch
-*.pch
-
-# Libraries
-*.lib
-*.a
-*.la
-*.lo
-
-# Shared objects (inc. Windows DLLs)
-*.dll
-*.so
-*.so.*
-*.dylib
-
-# Executables
-*.exe
-*.out
-*.app
-*.i*86
-*.x86_64
-*.hex
-
-# Debug files
-*.dSYM/
-*.su
-*.idb
-*.pdb
-
-# Kernel Module Compile Results
-*.mod*
-*.cmd
-.tmp_versions/
-modules.order
-Module.symvers
-Mkfile.old
-dkms.conf
-
-# debug information files
-*.dwo

OSs/lab3/README.txt

@@ -1 +0,0 @@
-Здесь я не буду оформлять первый уровень, потому что он фактически выглядит как копипаста. Возможно я потом докину его

OSs/lab3/level-2/Makefile

@@ -1,12 +0,0 @@
-targets = main
-all: $(targets)
-
-main: main.o buff.o
-	$(CC) -o $@ $^ $(CFLAGS)
-
-%.o: %.c
-	$(CC) -c $^ -o $@ $(CFLAGS)
-
-clean:
-	rm -f $(targets)
-	rm -f *.o

OSs/lab3/level-2/README.txt

@@ -1,5 +0,0 @@
-Во продвинутом уровне задания необходимо было реализовать паттерн producer-consumer. Заводится буффер определенного размера, а также потоки, которые в него что-то кладут и потоки, которые из него что-то берут.
-
-Внутри buff.c сокрыта вся магия по синхронизации буффера, постановке на него предметов и прочего. В main же только создаются потоки. Я решил, что producer будет создавать "ключи", а consumer будет их печатать
-
-Чтобы не решать проблемы с зачисткой буффера в конце, семафоры поставлены на таймаут, по истечении которого поток вылетит

OSs/lab3/level-2/buff.c

@@ -1,142 +0,0 @@
-#include <stdio.h>
-#include <semaphore.h>
-#include <string.h>
-#include <pthread.h>
-#include <errno.h>
-
-#include "buff.h"
-
-#define NBUFF 32
-#define TIMEOUT_SECS    5
-#define TIMEOUT_NSECS   0
-
-#define ARR_SIZE(arr) (sizeof(arr)/sizeof(arr[0]))
-
-static void __zero_msg(struct message *msg)
-{
-    memset(msg->msg, 0, sizeof(msg->msg));
-}
-
-static void __copy_msg(struct message *dest, const struct message *src)
-{
-    memcpy(dest->msg, src->msg, sizeof(src->msg));
-}
-
-static struct {
-    pthread_mutex_t msgs_lock;
-    sem_t nstored;
-    sem_t nempty;
-    struct message msgs[NBUFF];
-    size_t cidx; //< consumer offset
-    size_t pidx; //< producer offset
-} buf = {0};
-
-int buf_init(void)
-{
-    int ret = 0;
-    ret = sem_init(&buf.nstored, 0, 0);
-    if (ret) {
-        ret = -EFAULT;
-        goto error;
-    }
-    ret = sem_init(&buf.nempty, 0, ARR_SIZE(buf.msgs));
-    if (ret) {
-        ret = -EFAULT;
-        goto destroy_nstored;
-    }
-    ret = pthread_mutex_init(&buf.msgs_lock, NULL);
-    if (ret) {
-        goto destroy_nempty;
-    }
-    return 0;
-
-destroy_nempty:
-    sem_destroy(&buf.nempty);
-destroy_nstored:
-    sem_destroy(&buf.nstored);
-error:
-    return ret;
-};
-
-int buf_deinit(void)
-{
-    int ret = 0, tmp_ret;
-    if ((tmp_ret = pthread_mutex_destroy(&buf.msgs_lock))) ret = tmp_ret;
-    if ((tmp_ret = sem_destroy(&buf.nempty))) ret = tmp_ret;
-    if ((tmp_ret = sem_destroy(&buf.nstored))) ret = tmp_ret;
-    return ret;
-}
-
-#define __buf_wrap_idx(idx) (idx % ARR_SIZE(buf.msgs))
-#define __buf_consume_ptr (&buf.msgs[__buf_wrap_idx(buf.cidx)])
-#define __buf_produce_ptr (&buf.msgs[__buf_wrap_idx(buf.pidx)])
-
-static int __timeout_to_abs(struct timespec *ts, time_t secs, ssize_t nsec)
-{
-    int ret = timespec_get(ts, TIME_UTC);
-    if (ret != TIME_UTC) return -EFAULT;
-    ts->tv_sec += secs;
-    ts->tv_nsec += nsec;
-    return 0;
-}
-
-static int __sem_timedwait_rel(sem_t *sem, time_t secs, ssize_t nsecs)
-{
-    int ret;
-    struct timespec sem_timeout;
-    ret = __timeout_to_abs(&sem_timeout, secs, nsecs);
-    if (ret) return ret;
-    return sem_timedwait(sem, &sem_timeout);
-}
-
-static int __buf_consume(struct message *dest)
-{
-    int ret = pthread_mutex_lock(&buf.msgs_lock);
-    if (ret) {
-        return -EFAULT;
-    }
-    __copy_msg(dest, __buf_consume_ptr);
-    __zero_msg(__buf_consume_ptr);
-    buf.cidx++;
-    // Осозннано игнорируем ошибки
-    ret = pthread_mutex_unlock(&buf.msgs_lock);
-    return ret;
-}
-
-int buf_consume(struct message *dest)
-{
-    int ret = 0;
-    int semval = 0;
-    ret = __sem_timedwait_rel(&buf.nstored, TIMEOUT_SECS, TIMEOUT_NSECS);
-    if (ret) return ret;
-
-    ret = __buf_consume(dest);
-    if (ret) return ret;
-
-    ret = sem_post(&buf.nempty);
-    return ret;
-}
-
-static int __buf_push(const struct message *src)
-{
-    int ret = pthread_mutex_lock(&buf.msgs_lock);
-    if (ret) {
-        return -EFAULT;
-    }
-    __copy_msg(__buf_produce_ptr, src);
-    buf.pidx++;
-    ret = pthread_mutex_unlock(&buf.msgs_lock);
-    return ret;
-}
-
-int buf_push(const struct message *src)
-{
-    int ret = 0;
-    ret = __sem_timedwait_rel(&buf.nempty, TIMEOUT_SECS, TIMEOUT_NSECS);
-    if (ret) return ret;
-
-    ret = __buf_push(src);
-    if (ret) return ret;
-
-    return sem_post(&buf.nstored);
-}

OSs/lab3/level-2/buff.h

@@ -1,16 +0,0 @@
-#ifndef BUFF_H_
-#define BUFF_H_
-
-#define MSG_MAX_LEN 256
-
-struct message {
-    char msg[MSG_MAX_LEN];
-};
-
-int buf_init(void);
-int buf_deinit(void);
-
-int buf_consume(struct message *dest);
-int buf_push(const struct message *src);
-
-#endif

OSs/lab3/level-2/main.c

@@ -1,105 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <pthread.h>
-#include <stdbool.h>
-#include <unistd.h>
-
-#include "buff.h"
-
-#define ERR_PTR ((void *)1)
-#define VOID_CAST(num) ((void *) num)
-
-#define N_PRODUCERS 16
-#define N_CONSUMERS 1
-#define KEY_LEN     32 // len in chars
-
-const char key_syms[] = "abcdefghigklmnopqrstuvwxyzABCDEFGHIGKLMNOPQRSTUVWXYZ"
-                        "1234567890";
-
-#define ALPHABET_SIZE (sizeof(key_syms) - 1)
-
-pthread_t consumers[N_CONSUMERS] = {0};
-pthread_t producers[N_PRODUCERS] = {0};
-
-/**
- * Создает "ключи" - наборы "случайных" символов из
- * списка допустимых
- */
-void get_key(char key_dest[KEY_LEN])
-{
-    for (size_t i = 0; i < KEY_LEN; i++) {
-        size_t sym_idx = rand() % ALPHABET_SIZE;
-        key_dest[i] = key_syms[sym_idx];
-    }
-}
-
-volatile bool run = true;
-
-void *producer_routine(void *arg)
-{
-    size_t pidx = (size_t) arg;
-    struct message msg = {0};
-    while (run) {
-        get_key(msg.msg);
-        if (buf_push(&msg)) pthread_exit(ERR_PTR);
-        printf("[p%lu] pushed new key\n", pidx);
-        sleep(1);
-    }
-    pthread_exit(NULL);
-}
-
-void *consumer_routine(void *arg)
-{
-    size_t cidx = (size_t) arg;
-    struct message msg = {0};
-    while (run) {
-        if (buf_consume(&msg)) pthread_exit(ERR_PTR);
-        printf("[c%lu] obtained key %s\n", cidx, msg.msg);
-        sleep(1);
-    }
-    pthread_exit(NULL);
-}
-
-int main()
-{
-    if (buf_init()) {
-        printf("failed to init work buffer\n");
-        return EXIT_FAILURE;
-    }
-
-    for (size_t i = 0; i < N_PRODUCERS; i++) {
-        if (pthread_create(&producers[i], NULL,
-                           producer_routine, VOID_CAST(i))) {
-            printf("Failed to create enough consumer threads\n");
-            return EXIT_FAILURE;
-        }
-    }
-    for (size_t i = 0; i < N_CONSUMERS; i++) {
-        if (pthread_create(&consumers[i], NULL,
-                           consumer_routine, VOID_CAST(i))) {
-            printf("Failed to create enough consumer threads\n");
-            return EXIT_FAILURE;
-        }
-    }
-
-    sleep(10);
-    run = false;
-
-    void *ret = NULL;
-    for (size_t i = 0; i < N_PRODUCERS; i++) {
-        if (pthread_join(producers[i], &ret)) {
-            printf("failed to join producer");
-            return EXIT_FAILURE;
-        }
-    }
-    for (size_t i = 0; i < N_CONSUMERS; i++) {
-        if (pthread_join(consumers[i], &ret)) {
-            printf("failed to join consumer");
-            return EXIT_FAILURE;
-        }
-    }
-    // не используем разделяемые ресурсы, так что код возврата
-    // можно игнорировать, linux справится
-    buf_deinit();
-    return EXIT_SUCCESS;
-}

OSs/lab5/part-A/Makefile

@@ -1,12 +0,0 @@
-targets = main
-all: $(targets)
-
-main: main.o
-	$(CC) -o $@ $^ $(CFLAGS)
-
-%.o: %.c
-	$(CC) -c $^ -o $@ $(CFLAGS)
-
-clean:
-	rm -f $(targets)
-	rm -f *.o

OSs/lab5/part-A/main.c

@@ -1,132 +0,0 @@
-#include <unistd.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <errno.h>
-#include <stdbool.h>
-#include <string.h>
-#include <ctype.h>
-
-#define PIPE_READ_IDX   0
-#define PIPE_WRITE_IDX  1
-
-int client(int fd_read, int fd_write);
-int server(int fd_read, int fd_write);
-
-#define DO_OR_FAIL(cond) if (cond) return EXIT_FAILURE
-int main()
-{
-    int pipe_to_server[2], pipe_to_client[2];
-    DO_OR_FAIL(pipe(pipe_to_server) < 0);
-    DO_OR_FAIL(pipe(pipe_to_client) < 0);
-
-    pid_t client_pid;
-    if ((client_pid = fork()) == 0) { // server
-        DO_OR_FAIL(close(pipe_to_server[PIPE_WRITE_IDX]));
-        DO_OR_FAIL(close(pipe_to_client[PIPE_READ_IDX]));
-
-        DO_OR_FAIL(
-                server(
-                    pipe_to_server[PIPE_READ_IDX],
-                    pipe_to_client[PIPE_WRITE_IDX]
-                    )
-                );
-    }
-    // client
-    DO_OR_FAIL(close(pipe_to_server[PIPE_READ_IDX]));
-    DO_OR_FAIL(close(pipe_to_client[PIPE_WRITE_IDX]));
-
-    DO_OR_FAIL(
-            client(
-                pipe_to_client[PIPE_READ_IDX],
-                pipe_to_server[PIPE_WRITE_IDX]
-                )
-            );
-
-    return 0;
-}
-
-char *ltrim(char *s)
-{
-    while(isspace(*s)) s++;
-    return s;
-}
-
-char *rtrim(char *s)
-{
-    char* back = s + strlen(s);
-    while(isspace(*--back));
-    *(back+1) = '\0';
-    return s;
-}
-
-char *trim(char *s)
-{
-    return rtrim(ltrim(s)); 
-}
-
-#define BUF_SIZE 256
-
-#define DO_OR_PROPAGATE(call, expected, tmp_var) \
-    if ((tmp_var = (call)) != expected)) return tmp_var
-
-/**
- * Performs client actions
- *
- * @fd_read - pipe to read from
- * @fd_write - pipe to write t\no
- * 
- * returns 0 on success or -errno on fail
- */
-int client(int fd_read, int fd_write)
-{
-    char buf[BUF_SIZE] = {0};
-    if (!fgets(buf, BUF_SIZE, stdin)) return -EFAULT;
-    const char *s = trim(buf);
-    size_t len = strlen(s);
-    ssize_t n_written = write(fd_write, s, len);
-    if (n_written < 0 || n_written < len) {
-        return -EFAULT;
-    }
-    memset(buf, 0, BUF_SIZE);
-    size_t n;
-    while ((n = read(fd_read, buf, BUF_SIZE)) > 0) {
-        len = strlen(buf);
-        n_written = fwrite(buf, sizeof(buf[0]), strlen(buf), stdout);
-        if (n_written < 0 || n_written < len) {
-            return -EFAULT;
-        }
-        memset(buf, 0, sizeof(buf));
-    }
-    return 0;
-}
-
-/**
- * Performs server actions
- *
- * @fd_read - pipe to read from
- * @fd_write - pipe to write to
- *
- * returns 0 on success or -errno on fail
- */
-int server(int fd_read, int fd_write)
-{
-    char buf[BUF_SIZE] = {0};
-    size_t n = read(fd_read, buf, BUF_SIZE);
-    if (n == 0) return -EFAULT;
-    FILE *f = fopen(buf, "r");
-    // не 100% правильно, но наиболее вероятно
-    if (f == NULL) {
-        const char error_msg[] = "Can't open requested file\n";
-        write(fd_write, error_msg, sizeof(error_msg));
-        goto epilog;
-    }
-
-    while ((n = fread(buf, sizeof(buf[0]), BUF_SIZE, f)) > 0) {
-        write(fd_write, buf, n);
-        memset(buf, 0, sizeof(buf));
-    }
-
-epilog:
-    fclose(f);
-    return 0;
-}

OSs/lab5/part-B/Makefile

@@ -1,15 +0,0 @@
-targets = server client
-all: $(targets)
-
-server: server.o
-	$(CC) -o $@ $^ $(CFLAGS)
-
-client: client.o
-	$(CC) -o $@ $^ $(CFLAGS)
-
-%.o: %.c
-	$(CC) -c $^ -o $@ $(CFLAGS)
-
-clean:
-	rm -f $(targets)
-	rm -f *.o

OSs/lab5/part-B/client.c

@@ -1,80 +0,0 @@
-#include <unistd.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <errno.h>
-#include <ctype.h>
-#include <fcntl.h>
-
-#include "common.h"
-
-int client(int fd_read, int fd_write);
-
-int main()
-{
-    int read_fd, write_fd;
-    FAIL_ON((write_fd=open(FIFO_SERVER_PATH, O_WRONLY)) < 0);
-    FAIL_ON((read_fd=open(FIFO_CLIENT_PATH, O_RDONLY)) < 0);
-
-    FAIL_ON(client(read_fd, write_fd));
-
-    FAIL_ON(unlink(FIFO_SERVER_PATH) < 0);
-    printf("unlinked %s\n", FIFO_SERVER_PATH);
-    FAIL_ON(unlink(FIFO_CLIENT_PATH) < 0);
-    printf("unlinked %s\n", FIFO_CLIENT_PATH);
-
-    return EXIT_SUCCESS;
-}
-
-#define BUF_SIZE 256
-
-char *ltrim(char *s)
-{
-    while(isspace(*s)) s++;
-    return s;
-}
-
-char *rtrim(char *s)
-{
-    char* back = s + strlen(s);
-    while(isspace(*--back));
-    *(back+1) = '\0';
-    return s;
-}
-
-char *trim(char *s)
-{
-    return rtrim(ltrim(s)); 
-}
-
-/**
- * Performs client actions
- *
- * @fd_read - pipe to read from
- * @fd_write - pipe to write t\no
- * 
- * returns 0 on success or -errno on fail
- */
-int client(int fd_read, int fd_write)
-{
-    char buf[BUF_SIZE] = {0};
-    if (!fgets(buf, BUF_SIZE, stdin)) return -EFAULT;
-    const char *s = trim(buf);
-    size_t len = strlen(s);
-    ssize_t n_written = write(fd_write, s, len);
-    if (n_written < 0 || n_written < len) {
-        return -EFAULT;
-    }
-    memset(buf, 0, BUF_SIZE);
-    size_t n;
-    struct custom_ds ds;
-    while ((n = recv_msg(fd_read, &ds)) > 0) {
-        len = ds.hdr.len;
-        n_written = fwrite(ds.msg, sizeof(ds.msg[0]), len, stdout);
-        if (n_written < 0 || n_written < len) {
-            return -EFAULT;
-        }
-        memset(buf, 0, sizeof(buf));
-    }
-    return 0;
-}

OSs/lab5/part-B/common.h

@@ -1,45 +0,0 @@
-#ifndef COMMON_H_
-#define COMMON_H_
-
-#include <stdlib.h>
-#include <unistd.h>
-#include <errno.h>
-
-#define FIFO_SERVER_PATH "/tmp/fifo.to_server" // server reads this file
-#define FIFO_CLIENT_PATH "/tmp/fifo.to_client" // client reads this file
-
-#define __DATA_STRUCT_MSG_LEN 4096
-
-enum ds_types {
-    DS_MESSAGE,
-    DS_FAIL
-};
-
-struct custom_ds {
-    struct {
-        long len;
-        long type;
-    } hdr;
-    char msg[__DATA_STRUCT_MSG_LEN];
-};
-
-static inline ssize_t send_msg(int fd, const struct custom_ds *ds)
-{
-    return write(fd, ds, sizeof(ds->hdr) + ds->hdr.len);
-}
-
-static inline ssize_t recv_msg(int fd, struct custom_ds *reciever)
-{
-    size_t n_hdr = read(fd, reciever, sizeof(reciever->hdr));
-    if (n_hdr == 0) return 0; // eof reached
-    if (n_hdr != sizeof(reciever->hdr)) return -ENOMSG;
-    if (reciever->hdr.len == 0) return 0;
-
-    size_t n_payload = read(fd, &reciever->msg, reciever->hdr.len);
-    if (n_payload != reciever->hdr.len) return -EFAULT;
-    return n_hdr + n_payload;
-}
-
-#define FAIL_ON(cond) if (cond) return EXIT_FAILURE
-
-#endif

OSs/lab5/part-B/server.c

@@ -1,66 +0,0 @@
-#include <stdio.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <errno.h>
-
-#include "common.h"
-
-int server(int fd_read, int fd_write);
-
-int main()
-{
-    FAIL_ON(mknod(FIFO_SERVER_PATH, S_IFIFO | 0666, 0) < 0);
-    printf("created %s\n", FIFO_SERVER_PATH);
-    FAIL_ON(mknod(FIFO_CLIENT_PATH, S_IFIFO | 0666, 0) < 0);
-    printf("created %s\n", FIFO_CLIENT_PATH);
-
-    int read_fd, write_fd;
-    FAIL_ON((read_fd=open(FIFO_SERVER_PATH, O_RDONLY)) < 0);
-    FAIL_ON((write_fd=open(FIFO_CLIENT_PATH, O_WRONLY)) < 0);
-
-    return server(read_fd, write_fd);
-}
-
-#define BUF_SIZE 256
-
-/**
- * Performs server actions
- *
- * @fd_read - pipe to read from
- * @fd_write - pipe to write to
- *
- * returns 0 on success or -errno on fail
- */
-int server(int fd_read, int fd_write)
-{
-    char buf[BUF_SIZE] = {0};
-    size_t n = read(fd_read, buf, BUF_SIZE);
-    if (n == 0) return -EFAULT;
-    FILE *f = fopen(buf, "r");
-    // не 100% правильно, но наиболее вероятно
-    if (f == NULL) {
-        const char error_msg[] = "Can't open requested file\n";
-        struct custom_ds payload = {
-            .hdr.len = sizeof(error_msg),
-            .hdr.type = DS_FAIL,
-        };
-        strncpy(payload.msg, error_msg, sizeof(error_msg));
-        send_msg(fd_write, &payload);
-        goto epilog;
-    }
-
-    while ((n = fread(buf, sizeof(buf[0]), BUF_SIZE, f)) > 0) {
-        struct custom_ds payload = {
-            .hdr.len = n,
-            .hdr.type = DS_MESSAGE,
-        };
-        strncpy(payload.msg, buf, n);
-        send_msg(fd_write, &payload);
-        memset(buf, 0, sizeof(buf));
-    }
-
-epilog:
-    fclose(f);
-    return 0;
-}

OSs/lab6/Makefile

@@ -1,15 +0,0 @@
-targets = server_msg client_msg
-all: $(targets)
-
-server_msg: server_msg.o
-	$(CC) -o $@ $^ $(CFLAGS)
-
-client_msg: client_msg.o
-	$(CC) -o $@ $^ $(CFLAGS)
-
-%.o: %.c
-	$(CC) -c $^ -o $@ $(CFLAGS)
-
-clean:
-	rm -f $(targets)
-	rm -f *.o

OSs/lab6/client_msg.c

@@ -1,99 +0,0 @@
-#include <stdio.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/msg.h>
-#define MQ_KEY1 1234L
-#define MQ_KEY2 2345L
-#define MAXMESGDATA 4096
-
-struct mymesg {
-    long mesg_len;
-    long mesg_type;
-    char mesg_data[MAXMESGDATA];
-};
-
-void client(int readid, int writeid);
-ssize_t mesg_send(int id, struct mymesg *mptr);
-ssize_t mesg_recv(int id, struct mymesg *mptr);
-
-int main(int argc,char **argv)
-{
-    int readid, writeid;
-
-    if((writeid=msgget(MQ_KEY1,0666)) < 0)
-    {
-        printf("Client: can not get writeid!\n");
-        exit(1);
-    }
-    printf("Client:writeid=%d\n",writeid);
-
-    if((readid=msgget(MQ_KEY2,0666)) < 0)
-    {
-        printf("Client: can not get readid!\n");
-        exit(1);
-    }
-    printf("Client: readid=%d\n",readid);
-
-    client(readid,writeid);
-
-    if((msgctl(readid,IPC_RMID, NULL)) < 0)
-    {
-        printf("Client: can not delete massage queue2!\n"); exit(1);
-    }
-
-    if((msgctl(writeid,IPC_RMID, NULL)) < 0)
-    {
-        printf("Client: can not delete massage queue1!\n"); exit(1);
-    }
-
-    exit(0);
-}
-
-void client(int readid, int writeid)
-{
-    size_t len;
-    ssize_t n;
-    struct mymesg ourmesg;
-
-    printf("Client:readid=%d writeid=%d\n",readid,writeid);
-    printf("Input file name, please\n");
-
-    fgets(ourmesg.mesg_data,MAXMESGDATA, stdin);
-    len=strlen(ourmesg.mesg_data);
-
-    if(ourmesg.mesg_data[len-1]=='\n') len--;
-    ourmesg.mesg_len=len;
-
-    ourmesg.mesg_type=1;
-
-    printf("Client: %s\n",ourmesg.mesg_data);
-
-    mesg_send(writeid,&ourmesg);
-
-    printf("Client: tvk before recv!\n");
-
-    while((n= mesg_recv(readid, &ourmesg))>0)
-        //n= mesg_recv(readid, &ourmesg);
-        write(1,ourmesg.mesg_data, n);
-}
-
-ssize_t mesg_send(int id, struct mymesg *mptr)
-{
-    return(msgsnd(id, &(mptr->mesg_type),mptr->mesg_len, 0));
-}
-
-ssize_t mesg_recv(int id, struct mymesg *mptr)
-{
-    ssize_t n;
-
-    n=msgrcv(id, &(mptr->mesg_type),MAXMESGDATA,mptr->mesg_type, 0);
-    mptr->mesg_len=n;
-    printf("Client: n=%d\n",n);
-
-    return(n);	
-}
-

OSs/lab6/server_msg.c

@@ -1,116 +0,0 @@
-#include <stdio.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/msg.h>
-#define MQ_KEY1 1234L
-#define MQ_KEY2 2345L
-#define MAXMESGDATA 4096
-
-struct mymesg {
-    long mesg_len;
-    long mesg_type;
-    char mesg_data[MAXMESGDATA];
-};
-
-void server(int readid, int writeid);
-ssize_t mesg_send(int id, struct mymesg *mptr);
-ssize_t mesg_recv(int id, struct mymesg *mptr);
-
-int main(int argc,char **argv)
-{
-    int readid, writeid;
-    key_t key1,key2;
-
-    printf("Server: Hello tvk!\n");
-
-    /*
-       if((key1=ftok("/home/tvk/IPC/input.txt",'A'))<0)
-       {
-       printf("Server: can not get key!\n"); exit(1);
-       }
-       printf("key1=%x\n",key1);
-   */
-    if((readid=msgget(MQ_KEY1, 0666|IPC_CREAT)) < 0)
-    {
-        printf("Server: can not get readid!\n"); exit(1);
-    }
-    printf("Server: readid=%d\n",readid);
-    /*	
-        if((key2=ftok("/home/tvk/IPC/server_msg.c",'B'))<0)
-        {
-        printf("Server: can not get key!\n"); exit(1);
-        }
-        printf("key2=%x\n",key2);
-        */
-    if((writeid=msgget(MQ_KEY2, 0666|IPC_CREAT)) < 0)
-    {
-        printf("Server: can not get readid!\n"); exit(1);
-    }
-    printf("Server: writeid=%d\n",writeid);
-
-    server(readid,writeid);
-
-    exit(0);
-}
-
-void server(int readid, int writeid)
-{
-    FILE *fp;
-    ssize_t n;
-    struct mymesg ourmesg;
-
-    printf("Server:readid=%d writeid=%d\n",readid,writeid);
-
-    ourmesg.mesg_type=1;
-
-    if( (n=mesg_recv(readid, &ourmesg)) == 0)
-    {
-        printf("Server: can not read file name\n");
-        exit(1);	
-    }
-    ourmesg.mesg_data[n]='\0';
-
-    printf("Server: file name %s\n",ourmesg.mesg_data);
-
-    if( (fp=fopen(ourmesg.mesg_data,"r"))==NULL)
-    {
-        printf("Server: can not open file name\n");
-
-    }
-    else
-    {
-        printf("Server: %s is opened\n",ourmesg.mesg_data);
-
-        while(fgets(ourmesg.mesg_data, MAXMESGDATA,fp) != NULL)
-        { 
-            ourmesg.mesg_len=strlen(ourmesg.mesg_data);
-            printf("Server: %s\n",ourmesg.mesg_data);
-            mesg_send(writeid,&ourmesg);
-        }
-    }
-    fclose(fp);
-    ourmesg.mesg_len=0;
-    mesg_send(writeid,&ourmesg);
-}
-
-ssize_t mesg_send(int id, struct mymesg *mptr)
-{
-    return(msgsnd(id, &(mptr->mesg_type),mptr->mesg_len, 0));	
-}
-
-ssize_t mesg_recv(int id, struct mymesg *mptr)
-{
-    ssize_t n;
-    n=msgrcv(id, &(mptr->mesg_type),MAXMESGDATA,mptr->mesg_type, 0);
-    mptr->mesg_len=n;
-
-    return(n);	
-}
-
-
-
-