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26 lines
490 B
C
26 lines
490 B
C
#include "config.h"
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#include "f2c.h"
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#include "fio.h"
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integer
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f_rew (alist * a)
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{
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unit *b;
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if (f__init & 2)
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f__fatal (131, "I/O recursion");
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if (a->aunit >= MXUNIT || a->aunit < 0)
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err (a->aerr, 101, "rewind");
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b = &f__units[a->aunit];
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if (b->ufd == NULL || b->uwrt == 3)
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return (0);
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if (!b->useek)
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err (a->aerr, 106, "rewind");
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if (b->uwrt)
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{
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(void) t_runc (a);
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b->uwrt = 3;
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}
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FSEEK (b->ufd, 0, SEEK_SET);
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b->uend = 0;
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return (0);
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}
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