| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| |
| |
| #define BUFFER_SIZE 4096 |
| char buffer[BUFFER_SIZE]; |
| |
| #define CPUINFO_PATH "/proc/cpuinfo" |
| |
| int main(int argc, char** argv) { |
| int file = open(CPUINFO_PATH, O_RDONLY); |
| if (file == -1) { |
| fprintf(stderr, "Error: failed to open %s: %s\n", CPUINFO_PATH, strerror(errno)); |
| exit(EXIT_FAILURE); |
| } |
| |
| /* Only used for error reporting */ |
| size_t position = 0; |
| char* data_start = buffer; |
| ssize_t bytes_read; |
| do { |
| bytes_read = read(file, buffer, BUFFER_SIZE); |
| if (bytes_read < 0) { |
| fprintf(stderr, "Error: failed to read file %s at position %zu: %s\n", |
| CPUINFO_PATH, position, strerror(errno)); |
| exit(EXIT_FAILURE); |
| } |
| |
| position += (size_t) bytes_read; |
| if (bytes_read > 0) { |
| fwrite(buffer, 1, (size_t) bytes_read, stdout); |
| } |
| } while (bytes_read != 0); |
| |
| if (close(file) != 0) { |
| fprintf(stderr, "Error: failed to close %s: %s\n", CPUINFO_PATH, strerror(errno)); |
| exit(EXIT_FAILURE); |
| } |
| return EXIT_SUCCESS; |
| } |