37 lines
666 B
C
37 lines
666 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#define BUFSZ 8192
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int main( int argc, char** argv )
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{
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if ( argc < 3 )
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{
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fputs("usage: memread <pid> <offset> <size>\n",stderr);
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return 1;
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}
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char fn[256];
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snprintf(fn,256,"/proc/%s/mem",argv[1]);
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int fd = open(fn,O_RDONLY);
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if ( !fd )
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{
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perror("could not open process");
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return 2;
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}
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off_t memofs = 0;
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off_t siz = 0, srd;
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sscanf(argv[2],"%llx",&memofs);
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sscanf(argv[3],"%lld",&siz);
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lseek(fd,memofs,SEEK_SET);
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unsigned char buf[BUFSZ];
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while ( siz > 0 )
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{
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srd = read(fd,buf,(siz>BUFSZ)?BUFSZ:siz);
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write(1,buf,srd);
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siz -= srd;
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}
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close(fd);
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return 0;
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}
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