Rich Felker
2cdfb7ca26
- hide all the legacy xxxxxx32 name cruft in syscall.h so the actual source files can be clean and uniform across all archs. - cleanup llseek/lseek and mmap2/mmap handling for 32/64 bit systems - alternate implementation for nice if the target lacks nice syscall
22 lines
474 B
C
22 lines
474 B
C
#include "stdio_impl.h"
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static off_t retneg1(FILE *f, off_t off, int whence)
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{
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return -1;
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}
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off_t __stdio_seek(FILE *f, off_t off, int whence)
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{
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off_t ret;
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#ifdef __NR__llseek
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if (syscall5(__NR__llseek, f->fd, off>>32, off, (long)&ret, whence)<0)
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ret = -1;
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#else
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ret = syscall3(__NR_lseek, f->fd, off, whence);
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#endif
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/* Detect unseekable files and optimize future failures out */
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if (ret < 0 && off == 0 && whence == SEEK_CUR)
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f->seek = retneg1;
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return ret;
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}
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