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56 lines
1000 B
56 lines
1000 B
#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <unistd.h>
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const char *get_packet_name(const char *filename, int num)
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{
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static char buf[256] = {0};
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sprintf(buf, "%s.%d", filename, num);
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return buf;
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}
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int main(int argc, char const *argv[])
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{
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//打开输入文件
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int fd = open(argv[1], O_RDONLY);
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if (fd < 0)
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{
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perror("openfail");
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exit(-1);
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}
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int fileindex = 1;
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uint32_t sumcheck = 0;
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uint8_t *data = malloc(100 * 1024 * 1024);
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if (data == NULL)
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{
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perror("malloc fail");
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exit(-1);
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}
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while (1)
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{
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int readlen = read(fd, data, 100 * 1024 * 1024);
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if (readlen <= 0)
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{
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printf("write end\n");
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break;
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}
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for (size_t i = 0; i < readlen; i++)
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{
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sumcheck += data[i];
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}
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}
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printf("sumcheck %d\n", sumcheck);
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return 0;
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}
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