infile = popen(cmd, "r"); /* use "w" for zwrite */
if (infile == NULL) {
fprintf(stderr, "%s: popen('%s', 'r') failed\n", argv[0], cmd);
infile = popen(cmd, "r"); /* use "w" for zwrite */
if (infile == NULL) {
fprintf(stderr, "%s: popen('%s', 'r') failed\n", argv[0], cmd);