mirror of
https://github.com/fluencelabs/musl
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21 lines
584 B
C
21 lines
584 B
C
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#include <sys/mman.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include "syscall.h"
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void *__mmap(void *, size_t, int, int, int, off_t);
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const char unsigned *__map_file(const char *pathname, size_t *size)
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{
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struct stat st;
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const unsigned char *map = MAP_FAILED;
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int flags = O_RDONLY|O_LARGEFILE|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK;
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int fd = __syscall(SYS_open, pathname, flags);
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if (fd < 0) return 0;
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if (!__syscall(SYS_fstat, fd, &st))
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map = __mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
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__syscall(SYS_close);
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*size = st.st_size;
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return map == MAP_FAILED ? 0 : map;
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}
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