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#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;
}
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