stdout, never heard of it.

gistfile1.sh

android@android:/android/build/aosp/system/core/fastboot$ ag stderr
usb_windows.c
40:#define DBG(x...) fprintf(stderr, x)

protocol.c
71:            fprintf(stderr,"(bootloader) %s\n", status + 4);

usbtest.c
99:            fprintf(stderr,"write failed (%s)\n", strerror(errno));
104:    fprintf(stderr,"%d bytes in %lld uS\n", arg_count * arg_size, (t1 - t0));
117:            fprintf(stderr,"read failed (%s)\n", strerror(errno));
122:    fprintf(stderr,"%d bytes in %lld uS\n", arg_count * arg_size, (t1 - t0));
144:    fprintf(stderr,"usage: usbtest <testname>\n\navailable tests:\n");
146:        fprintf(stderr," %-8s %s\n", tests[i].cmd, tests[i].help);
160:            fprintf(stderr,"unknown argument: %s\n", arg);
166:        fprintf(stderr,"count may not be zero\n");
171:        fprintf(stderr,"size may not be greater than 4096\n");
196:                    fprintf(stderr,"usbtest: %s: could not find interface\n",
201:                    fprintf(stderr,"usbtest: %s: FAIL\n", tests[i].cmd);
204:                    fprintf(stderr,"usbtest: %s: OKAY\n", tests[i].cmd);

fastboot.c
129:        fprintf(stderr,"unknown partition '%s'\n", item);
266:            fprintf(stderr,"< waiting for device >\n");
281:    fprintf(stderr,
327:        fprintf(stderr, "no image specified\n");
333:        fprintf(stderr, "cannot load '%s': %s\n", kernel, strerror(errno));
342:            fprintf(stderr, "cannot boot a boot.img *and* ramdisk\n");
353:            fprintf(stderr,"cannot load '%s': %s\n", ramdisk, strerror(errno));
358:    fprintf(stderr,"creating boot image...\n");
364:        fprintf(stderr,"failed to create boot.img\n");
368:    fprintf(stderr,"creating boot image - %d bytes\n", bsize);
382:        fprintf(stderr, "archive does not contain '%s'\n", name);
392:        fprintf(stderr, "failed to allocate %d bytes\n", *sz);
397:        fprintf(stderr, "failed to unzip '%s' from archive\n", name);
572:            fprintf(stderr, "target reported max download size of %lld bytes\n",
993:                fprintf(stderr, "******** Did you mean to fastboot format this partition?\n");

usb_linux.c
65:#define DBG1(x...) fprintf(stderr, x)
66:#define DBG(x...) fprintf(stderr, x)

util.c
64:    fprintf(stderr,"error: ");
65:    vfprintf(stderr, fmt, ap);
66:    fprintf(stderr,"\n");

engine.c
160:        fprintf(stderr,"FAILED (%s)\n", resp);
163:        fprintf(stderr,"OKAY [%7.3fs]\n", (split - a->start));
291:            fprintf(stderr,
293:            fprintf(stderr,
297:        fprintf(stderr,"FAILED (%s)\n", fb_get_error());
309:            fprintf(stderr,
311:            fprintf(stderr,
315:        fprintf(stderr,"Formatting is not supported for filesystem with type '%s'.\n",
323:            fprintf(stderr,
325:            fprintf(stderr, "Unable to get partition size\n.");
328:        fprintf(stderr,"FAILED (%s)\n", fb_get_error());
335:        fprintf(stderr,"Cannot generate image.\n");
341:    fprintf(stderr, "sending '%s' (%lli KB)...\n", partition, image.image_size/1024);
345:    fprintf(stderr, "writing '%s'...\n", partition);
425:        fprintf(stderr,"FAILED (%s)\n", resp);
432:            fprintf(stderr,"IGNORE, product is %s required only for %s [%7.3fs]\n",
444:        fprintf(stderr,"OKAY [%7.3fs]\n", (split - a->start));
449:    fprintf(stderr,"FAILED\n\n");
450:    fprintf(stderr,"Device %s is '%s'.\n", a->cmd + 7, resp);
451:    fprintf(stderr,"Update %s '%s'",
454:        fprintf(stderr," or '%s'", value[n]);
456:    fprintf(stderr,".\n\n");
486:        fprintf(stderr, "%s FAILED (%s)\n", a->cmd, resp);
489:    fprintf(stderr, "%s: %s\n", (char*) a->data, resp);
505:        fprintf(stderr, "%s FAILED (%s)\n", a->cmd, resp);
523:    fprintf(stderr,"\n");
575:            // fprintf(stderr,"%30s... ",a->msg);
576:            fprintf(stderr,"%s...\n",a->msg);
591:            fprintf(stderr,"%s\n",(char*)a->data);
607:    fprintf(stderr,"finished. total time: %.3fs\n", (now() - start));

usb_osx.c
45:#define WARN(x...) fprintf(stderr, x)
50:#define ERR(x...) fprintf(stderr, "ERROR: " x)



android@android:/android/build/aosp/system/core/fastboot$ ag stdout

android@android:/android/build/aosp/system/core/fastboot$