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Commit 0bb01321 authored by Tanguy Pruvot's avatar Tanguy Pruvot
Browse files

logwrapper: reduce verbosity and fix usage 

 - no info on normal process exit
 - basename as tag, not fullpath
 - fix bad "-x" parameter, its "-d", checked in code

Change-Id: Ife72729eaee2a366bd4226f3fbe3ba074219c974
parent df96c7ef

logwrapper/logwrapper.c

+11 −6
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ 
#include <unistd.h>

#include <errno.h>

#include <fcntl.h>

#include <libgen.h>



#include "private/android_filesystem_config.h"

#include "cutils/log.h"
@@ -34,13 +35,13 @@ void fatal(const char *msg) { 


void usage() {

    fatal(

        "Usage: logwrapper [-x] BINARY [ARGS ...]\n"

        "Usage: logwrapper [-d] BINARY [ARGS ...]\n"

        "\n"

        "Forks and executes BINARY ARGS, redirecting stdout and stderr to\n"

        "the Android logging system. Tag is set to BINARY, priority is\n"

        "always LOG_INFO.\n"

        "\n"

        "-x: Causes logwrapper to SIGSEGV when BINARY terminates\n"

        "-d: Causes logwrapper to SIGSEGV when BINARY terminates\n"

        "    fault address is set to the status of wait()\n");

}
@@ -51,6 +52,10 @@ void parent(const char *tag, int seg_fault_on_exit, int parent_read) { 
    int a = 0;  // start index of unprocessed data

    int b = 0;  // end index of unprocessed data

    int sz;



    char *btag = basename(tag);

    if (!strlen(btag)) btag = (char*) tag;



    while ((sz = read(parent_read, &buffer[b], sizeof(buffer) - 1 - b)) > 0) {



        sz += b;
@@ -60,7 +65,7 @@ void parent(const char *tag, int seg_fault_on_exit, int parent_read) { 
                buffer[b] = '\0';

            } else if (buffer[b] == '\n') {

                buffer[b] = '\0';

                LOG(LOG_INFO, tag, "%s", &buffer[a]);

                LOG(LOG_INFO, btag, "%s", &buffer[a]);

                a = b + 1;

            }

        }
@@ -68,7 +73,7 @@ void parent(const char *tag, int seg_fault_on_exit, int parent_read) { 
        if (a == 0 && b == sizeof(buffer) - 1) {

            // buffer is full, flush

            buffer[b] = '\0';

            LOG(LOG_INFO, tag, "%s", &buffer[a]);

            LOG(LOG_INFO, btag, "%s", &buffer[a]);

            b = 0;

        } else if (a != b) {

            // Keep left-overs
@@ -84,11 +89,11 @@ void parent(const char *tag, int seg_fault_on_exit, int parent_read) { 
    // Flush remaining data

    if (a != b) {

        buffer[b] = '\0';

	LOG(LOG_INFO, tag, "%s", &buffer[a]);

        LOG(LOG_INFO, btag, "%s", &buffer[a]);

    }

    status = 0xAAAA;

    if (wait(&status) != -1) {  // Wait for child

        if (WIFEXITED(status))

        if (WIFEXITED(status) && WEXITSTATUS(status))

            LOG(LOG_INFO, "logwrapper", "%s terminated by exit(%d)", tag,

                    WEXITSTATUS(status));

        else if (WIFSIGNALED(status))