Increase standard I/O buffer a lot to be able to

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@suse.de>

diff --git a/sysctl.c b/sysctl.c
index 29f31af6e9e027850dd7d771dc0e30c2825d95ee..be057229a7917ff46fa24c98035785723ff18b89 100644 (file)
--- a/sysctl.c
+++ b/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);