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kconfig: allow long lines in config file

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For some config options (CONFIG_EXTRA_FIRMWARE, for example), the length
of a config file line can exceed the 1024 byte buffer.

Switch from fgets to compat_getline to fix. compat_getline is an
internally implimented getline work-alike for portability purposes.

Signed-off-by: Cody Schafer <cody@linux.vnet.ibm.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This commit is contained in:
Cody Schafer 2012-07-13 11:27:12 -07:00 committed by Michal Marek
parent 92b72e8bcb
commit 1a7a8c6fd8
1 changed files with 59 additions and 2 deletions
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61
scripts/kconfig/confdata.c
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@ -182,10 +182,66 @@ static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
return 0;
}
#define LINE_GROWTH 16
static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
{
char *nline;
size_t new_size = slen + 1;
if (new_size > *n) {
new_size += LINE_GROWTH - 1;
new_size *= 2;
nline = realloc(*lineptr, new_size);
if (!nline)
return -1;
*lineptr = nline;
*n = new_size;
}
(*lineptr)[slen] = c;
return 0;
}
static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
{
char *line = *lineptr;
size_t slen = 0;
for (;;) {
int c = getc(stream);
switch (c) {
case '\n':
if (add_byte(c, &line, slen, n) < 0)
goto e_out;
slen++;
/* fall through */
case EOF:
if (add_byte('\0', &line, slen, n) < 0)
goto e_out;
*lineptr = line;
if (slen == 0)
return -1;
return slen;
default:
if (add_byte(c, &line, slen, n) < 0)
goto e_out;
slen++;
}
}
e_out:
line[slen-1] = '\0';
*lineptr = line;
return -1;
}
int conf_read_simple(const char *name, int def)
{
FILE *in = NULL;
char line[1024];
char *line = NULL;
size_t line_asize = 0;
char *p, *p2;
struct symbol *sym;
int i, def_flags;
@ -247,7 +303,7 @@ load:
}
}
while (fgets(line, sizeof(line), in)) {
while (compat_getline(&line, &line_asize, in) != -1) {
conf_lineno++;
sym = NULL;
if (line[0] == '#') {
@ -335,6 +391,7 @@ setsym:
cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
}
}
free(line);
fclose(in);
if (modules_sym)