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b39d571990
2002-02-25 Jakub Jelinek <jakub@redhat.com> * libio/iofopen.c (__fopen_maybe_mmap): Set the initial position to fp->_offset if it is set. * stdio-common/Makefile (tests): Add tst-fdopen. * stdio-common/tst-fdopen.c: New test. 2002-02-25 Jakub Jelinek <jakub@redhat.com> * libio/fileops.c (_IO_file_xsgetn_mmap): Handle reading from backup. * stdio-common/tst-ungetc.c (main): Add another test.
63 lines
1.2 KiB
C
63 lines
1.2 KiB
C
/* Test for ungetc bugs. */
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#include <stdio.h>
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#include <unistd.h>
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#define assert(x) \
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if (!(x)) \
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{ \
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fputs ("test failed: " #x "\n", stderr); \
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retval = 1; \
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goto the_end; \
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}
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int
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main (int argc, char *argv[])
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{
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char *name;
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FILE *fp = NULL;
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int retval = 0;
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int c;
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char buffer[64];
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name = tmpnam (NULL);
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fp = fopen (name, "w");
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assert (fp != NULL)
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fputs ("bla", fp);
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fclose (fp);
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fp = NULL;
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fp = fopen (name, "r");
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assert (fp != NULL);
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assert (ungetc ('z', fp) == 'z');
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assert (getc (fp) == 'z');
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assert (getc (fp) == 'b');
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assert (getc (fp) == 'l');
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assert (ungetc ('m', fp) == 'm');
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assert (getc (fp) == 'm');
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assert ((c = getc (fp)) == 'a');
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assert (getc (fp) == EOF);
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assert (ungetc (c, fp) == c);
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assert (feof (fp) == 0);
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assert (getc (fp) == c);
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assert (getc (fp) == EOF);
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fclose (fp);
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fp = NULL;
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fp = fopen (name, "r");
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assert (fp != NULL);
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assert (getc (fp) == 'b');
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assert (getc (fp) == 'l');
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assert (ungetc ('b', fp) == 'b');
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assert (fread (buffer, 1, 64, fp) == 2);
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assert (buffer[0] == 'b');
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assert (buffer[1] == 'a');
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the_end:
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if (fp != NULL)
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fclose (fp);
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unlink (name);
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return retval;
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}
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