--- libmultipath/print.c | 31 +++++++++++++++++++++++++++---- 1 file changed, 27 insertions(+), 4 deletions(-) Index: multipath-tools-130222/libmultipath/print.c =================================================================== --- multipath-tools-130222.orig/libmultipath/print.c +++ multipath-tools-130222/libmultipath/print.c @@ -8,6 +8,8 @@ #include #include #include +#include +#include #include "checkers.h" #include "vector.h" @@ -24,6 +26,7 @@ #include "switchgroup.h" #include "devmapper.h" #include "uevent.h" +#include "debug.h" #define MAX(x,y) (x > y) ? x : y #define TAIL (line + len - 1 - c) @@ -754,12 +757,32 @@ snprint_pathgroup (char * line, int len, extern void print_multipath_topology (struct multipath * mpp, int verbosity) { - char buff[MAX_LINE_LEN * MAX_LINES] = {}; + int resize; + char *buff = NULL; + char *old = NULL; + int len, maxlen = MAX_LINE_LEN * MAX_LINES; - memset(&buff[0], 0, MAX_LINE_LEN * MAX_LINES); - snprint_multipath_topology(&buff[0], MAX_LINE_LEN * MAX_LINES, - mpp, verbosity); + buff = MALLOC(maxlen); + do { + if (!buff) { + if (old) + FREE(old); + condlog(0, "couldn't allocate memory for list: %s\n", + strerror(errno)); + return; + } + + len = snprint_multipath_topology(buff, maxlen, mpp, verbosity); + resize = (len == maxlen - 1); + + if (resize) { + maxlen *= 2; + old = buff; + buff = REALLOC(buff, maxlen); + } + } while (resize); printf("%s", buff); + FREE(buff); } extern int