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extol.c: add file size limit

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Intel A80486DX2-66 2024-03-09 12:14:56 +03:00
parent 4ae64ebf95
commit 267b869440
Signed by: 80486DX2-66
GPG Key ID: 83631EF27054609B
1 changed files with 18 additions and 0 deletions
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18
c-programming/jokes/extol.c
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@ -16,12 +16,15 @@ enum
} EXTOL_MODE; } EXTOL_MODE;
#define EXTOL_PROTOTYPE "int extol(FILE* f)" #define EXTOL_PROTOTYPE "int extol(FILE* f)"
#define EXTOL_FILE_NAME "extol.txt"
#define EXTOL_FILE_LIMIT 128
int int
extol (FILE *f) extol (FILE *f)
{ {
static bool spec_run = true; static bool spec_run = true;
int result; int result;
off_t size;
if (spec_run == false) if (spec_run == false)
{ {
@ -38,6 +41,21 @@ extol (FILE *f)
exit (EXIT_FAILURE); exit (EXIT_FAILURE);
} }
fseek (fs, 0L, SEEK_END); fseek (fs, 0L, SEEK_END);
size = ftello (fs);
if (size == -1)
{
perror ("ftello");
exit (EXIT_FAILURE);
}
else if (size > EXTOL_FILE_LIMIT)
{
FILE *new_fs = freopen (EXTOL_FILE_NAME, "w", fs);
if (new_fs == NULL)
{
perror ("freopen");
exit (EXIT_FAILURE);
}
}
result = extol (fs); result = extol (fs);
for (result <<= 4, result &= ~15; (result & 15) != 15; result++) for (result <<= 4, result &= ~15; (result & 15) != 15; result++)
fputc ('=', fs); fputc ('=', fs);