77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
#define _POSIX_C_SOURCE 200112L
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include "error.h"
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#include "shr_mem.h"
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#include <semaphore.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <signal.h>
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#define MAX_SIZE 300
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#define MAX_AMOUNT_SIZE 10
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#define MAX_PID_SIZE 10
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#define MAX_PATH_SIZE 100
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#define MAX_OUTPUT_SIZE 200 + MAX_PATH_SIZE
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int main(int argc, char * argv[]) {
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char amount[MAX_AMOUNT_SIZE];
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char masterPid[MAX_PID_SIZE];
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switch (argc) {
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case 1:
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fgets(amount, MAX_AMOUNT_SIZE, stdin);
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amount[strcspn(amount, "\n")] = '\0';
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fgets(masterPid, MAX_PID_SIZE, stdin);
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masterPid[strcspn(masterPid, "\n")] = '\0';
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break;
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case 3:
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strcpy(amount, argv[1]);
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strcpy(masterPid, argv[2]);
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break;
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default:
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printError("View must receive amount of files and the pid of master process by argument or stdin");
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}
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int files = atoi(amount);
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int mPid = atoi(masterPid);
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printf("%d\n", files);
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printf("%d\n", mPid);
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union sigval value;
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sigqueue(mPid, SIGUSR1, value);
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sleep(2);
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int fd;
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char * shmPointer;
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if ((fd = shm_open("/BottlerSHM", O_RDONLY, S_IRUSR)) < 0)
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printSystemError("shm_open() -- ERROR");
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if ((shmPointer = mmap(0, (argc - 1) * MAX_OUTPUT_SIZE, PROT_READ, MAP_SHARED, fd, 0)) == MAP_FAILED){
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printSystemError("mmap() -- ERROR");
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}
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void * shmStart;
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shmStart = shmPointer;
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char buf[MAX_SIZE];
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while (files-- > 0) {
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shmPointer += readShm(shmPointer, buf, MAX_SIZE);
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printf("%s\n", buf);
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}
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if (munmap(shmStart, (argc - 1) * MAX_OUTPUT_SIZE) == -1)
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printSystemError("munmap() -- ERROR");
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close(fd);
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// terminateShm("/BottlerSHM", fd, shmPointer, (argc - 1) * MAX_OUTPUT_SIZE);
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sigqueue(mPid, SIGUSR2, value);
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return EXIT_SUCCESS;
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}
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