43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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struct a {
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int a;
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char str[30];
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};
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/*
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* give an argument to keep the file /tmp/structdump
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* like this: bin/dump aaa
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*/
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int main(int argc, char** argv){
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struct a* mystruct = malloc(sizeof(struct a));
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if(mystruct == NULL){
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printf("malloc for 1st struct failed!\n");
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return 1;
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}
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mystruct->a = 12;
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char s[30] = "Wer das liest ist doof";
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strcpy(mystruct->str, s);
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FILE* fptr = fopen("/tmp/structdump", "wb");
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fwrite(mystruct, sizeof(struct a), 1, fptr);
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fclose(fptr);
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free(mystruct);
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fptr = fopen("/tmp/structdump", "rb");
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mystruct = malloc(sizeof(struct a));
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if(mystruct == NULL){
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printf("malloc for 2nd struct failed!\n");
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return 1;
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}
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fread(mystruct, sizeof(struct a), 1, fptr);
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printf("mystruct->a: %d\nmystruct->str: \"%s\"\n", mystruct->a, mystruct->str); // SIGSEV
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free(mystruct);
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fclose(fptr);
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if(argc<2)
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remove("/tmp/structdump");
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return 0;
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}
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