In rtld's map_object(), use pread(..., 0) rather than read() to read the
ELF header from the front of the file. As all other I/O on the binary is done using mmap(), this avoids the need for seek privileges on the file descriptor during run-time linking. MFC after: 1 month Sponsored by: Google
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=197808
@ -273,7 +273,7 @@ get_elf_header (int fd, const char *path)
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} u;
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ssize_t nbytes;
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if ((nbytes = read(fd, u.buf, PAGE_SIZE)) == -1) {
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if ((nbytes = pread(fd, u.buf, PAGE_SIZE, 0)) == -1) {
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_rtld_error("%s: read error: %s", path, strerror(errno));
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return NULL;
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}
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