read huge informations at once as otherwise all files below
/proc/sys, not using the seq_file API at the kernel side,
will return EOF on a second read.
Signed-off-by: Werner Fink <werner@xxxxxxx>
---
sysctl.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git sysctl.c sysctl.c
index 29f31af..be05722 100644
--- sysctl.c
+++ sysctl.c
@@ -158,6 +158,8 @@ static char *StripLeadingAndTrailingSpaces(char *oneline)
/*
* Read a sysctl setting
*/
+#define IOBUFSIZ (128<<10)
+static char *iobuf;
static int ReadSetting(const char *restrict const name)
{
int rc = 0;
@@ -220,6 +222,9 @@ static int ReadSetting(const char *restrict const name)
fp = fopen(tmpname, "r");
+ if (iobuf)
+ setvbuf(fp, iobuf, _IOFBF, IOBUFSIZ);
+
if (!fp) {
switch (errno) {
case ENOENT:
@@ -430,6 +435,9 @@ static int WriteSetting(const char *setting)
fp = fopen(tmpname, "w");
+ if (iobuf)
+ setvbuf(fp, iobuf, _IOFBF, IOBUFSIZ);
+
if (!fp) {
switch (errno) {
case ENOENT:
@@ -793,6 +801,8 @@ int main(int argc, char *argv[])
argc -= optind;
argv += optind;
+ iobuf = (char*)malloc(IOBUFSIZ); /* Allow to fail */
+
if (DisplayAllOpt)
return DisplayAll(PROC_PATH);
--
2.12.3