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fixed bug where find region wouldn't detect a NULL return from map and thus segv'd when suggesting a noexist file would occur

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Emil 2023-10-11 11:16:07 +00:00
parent cc398f4746
commit 2a02e5781c
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GPG Key ID: 5432DB986FDBCF8A
1 changed files with 10 additions and 10 deletions
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20
baked.c
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@ -48,7 +48,7 @@
static char * g_filename, * g_short, * g_all;
static char *
map(const char * fn, size_t * len)
map(char * fn, size_t * len)
{
struct stat s;
int fd;
@ -68,10 +68,10 @@ map(const char * fn, size_t * len)
return addr;
}
static const char *
find(const char * x, const char * buf, const size_t max, const size_t min)
static char *
find(char * x, char * buf, size_t max, size_t min)
{
const char * start = buf;
char * start = buf;
for (; *buf; ++buf)
{
if (max - (buf - start) > min && !strncmp(buf, x, min))
@ -81,20 +81,20 @@ find(const char * x, const char * buf, const size_t max, const size_t min)
}
static char *
find_region(const char * fn)
find_region(char * fn)
{
size_t len = 0;
char * buf = NULL, * addr;
const char * start, * stop;
char * start, * stop;
addr = map(fn, &len);
if (addr != MAP_FAILED)
if ((ptrdiff_t) addr > 0)
{
start = find(START, addr, len, strlen(START));
#ifdef OTHER_START
if (!start)
{
start = find(OTHER_START, addr, len, strlen(OTHER_START));
start = (const char *) /* DON'T QUESTION IT */
start = (char *) /* DON'T QUESTION IT */
((ptrdiff_t) (start - strlen(START) + strlen(OTHER_START)) * (start != 0));
}
#endif /* OTHER_START */
@ -163,7 +163,7 @@ root(char * root)
}
static char *
insert(const char * new, char * str, size_t offset, size_t shift)
insert(char * new, char * str, size_t offset, size_t shift)
{
size_t len, max;
local_assert(new, str);
@ -296,7 +296,7 @@ strip(char * buf)
}
static int
run(const char * buf)
run(char * buf)
{
fputs("Output:\n", stderr);
root(g_filename);