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glibc/stdio-common/bug7.c
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/* Regression test for fseek and freopen bugs. */ | |
#include <stdio.h> | |
int | |
main (int argc, char *argv[]) | |
{ | |
int lose = 0; | |
char filename[L_tmpnam]; | |
FILE *fp; | |
if (tmpnam (filename) == NULL) | |
{ | |
printf ("tmpnam failed\n"); | |
lose = 1; | |
} | |
else | |
{ | |
fp = fopen (filename, "w+"); | |
fprintf (fp, "Hello world!\n"); | |
fflush (fp); | |
fseek (fp, 5L, SEEK_SET); | |
if (fseek (fp, -1L, SEEK_CUR) < 0) | |
{ | |
printf ("seek failed\n"); | |
lose = 1; | |
} | |
fclose (fp); | |
remove (filename); | |
} | |
{ | |
FILE *file1; | |
FILE *file2; | |
char filename1[L_tmpnam]; | |
char filename2[L_tmpnam]; | |
int ch; | |
if (tmpnam (filename1) == NULL || tmpnam (filename2) == NULL) | |
{ | |
printf ("tmpnam failed\n"); | |
lose = 1; | |
} | |
else | |
{ | |
file1 = fopen (filename1, "w"); | |
fclose (file1); | |
file2 = fopen (filename2, "w"); | |
fputc ('x', file2); | |
fclose (file2); | |
file1 = fopen (filename1, "r"); | |
file2 = freopen (filename2, "r", file1); | |
if ((ch = fgetc (file2)) != 'x') | |
{ | |
printf ("wrong character in reopened file, value = %d\n", ch); | |
lose = 1; | |
} | |
fclose (file2); | |
remove (filename1); | |
remove (filename2); | |
} | |
} | |
puts (lose ? "Test FAILED!" : "Test succeeded."); | |
return lose; | |
} |