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tools: env: Use getline rather than fgets when reading config/script

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When reading the config file, or a script file, use getline rather than
fgets so line lengths aren't limited by the size of a compiled in buffer
(128 characters for config, 1024 for scripts).

Rename 'dump' to 'line' so it's clear we're working with a line of text.

Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
This commit is contained in:
Alex Kiernan 2018-06-07 12:20:05 +00:00 committed by Tom Rini
parent 2aa686775b
commit 94b233f443
1 changed files with 21 additions and 19 deletions
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40
tools/env/fw_env.c vendored
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@ -737,7 +737,8 @@ int fw_env_set(int argc, char *argv[], struct env_opts *opts)
int fw_parse_script(char *fname, struct env_opts *opts)
{
FILE *fp;
char dump[1024]; /* Maximum line length in the file */
char *line = NULL;
size_t linesize = 0;
char *name;
char *val;
int lineno = 0;
@ -763,36 +764,34 @@ int fw_parse_script(char *fname, struct env_opts *opts)
}
}
while (fgets(dump, sizeof(dump), fp)) {
while ((len = getline(&line, &linesize, fp)) != -1) {
lineno++;
len = strlen(dump);
/*
* Read a whole line from the file. If the line is too long
* or is not terminated, reports an error and exit.
* Read a whole line from the file. If the line is not
* terminated, reports an error and exit.
*/
if (dump[len - 1] != '\n') {
if (line[len - 1] != '\n') {
fprintf(stderr,
"Line %d not corrected terminated or too long\n",
"Line %d not correctly terminated\n",
lineno);
ret = -1;
break;
}
/* Drop ending line feed / carriage return */
dump[--len] = '\0';
if (len && dump[len - 1] == '\r')
dump[--len] = '\0';
line[--len] = '\0';
if (len && line[len - 1] == '\r')
line[--len] = '\0';
/* Skip comment or empty lines */
if (len == 0 || dump[0] == '#')
if (len == 0 || line[0] == '#')
continue;
/*
* Search for variable's name,
* remove leading whitespaces
* Search for variable's name remove leading whitespaces
*/
name = skip_blanks(dump);
name = skip_blanks(line);
if (!name)
continue;
@ -829,6 +828,7 @@ int fw_parse_script(char *fname, struct env_opts *opts)
}
}
free(line);
/* Close file if not stdin */
if (strcmp(fname, "-") != 0)
@ -1760,19 +1760,20 @@ static int get_config(char *fname)
FILE *fp;
int i = 0;
int rc;
char dump[128];
char *line = NULL;
size_t linesize = 0;
char *devname;
fp = fopen(fname, "r");
if (fp == NULL)
return -1;
while (i < 2 && fgets(dump, sizeof(dump), fp)) {
/* Skip incomplete conversions and comment strings */
if (dump[0] == '#')
while (i < 2 && getline(&line, &linesize, fp) != -1) {
/* Skip comment strings */
if (line[0] == '#')
continue;
rc = sscanf(dump, "%ms %lli %lx %lx %lx",
rc = sscanf(line, "%ms %lli %lx %lx %lx",
&devname,
&DEVOFFSET(i),
&ENVSIZE(i), &DEVESIZE(i), &ENVSECTORS(i));
@ -1788,6 +1789,7 @@ static int get_config(char *fname)
i++;
}
free(line);
fclose(fp);
have_redund_env = i - 1;