mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Nathan Scott
33 lines
559 B
C
33 lines
559 B
C
/* mmapcat.c - derived from source by misiek@pld.ORG.PL */
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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int main(int argc, char **argv)
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{
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int fd;
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char *ptr, *ptr2;
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struct stat st;
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fd=open(argv[1],O_RDONLY);
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if(fd<0) {
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perror(argv[1]);
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exit(1);
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}
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fstat(fd,&st);
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if(st.st_size%4096==0) {
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fprintf(stderr,"bad file size!\n");
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exit(1);
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}
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ptr2 = ptr = mmap(NULL,st.st_size,PROT_READ,MAP_PRIVATE,fd,0);
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while (*ptr!=0) ptr++;
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write(1,ptr2,ptr - ptr2);
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exit(0);
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}
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