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authorBjörn-Egil Dahlberg <[email protected]>2012-07-24 17:03:01 +0200
committerBjörn-Egil Dahlberg <[email protected]>2012-07-24 17:14:16 +0200
commit0da1a7be25ec7ae3a185dd69d3e3d6e1f5401dbb (patch)
tree36721a788d0b7d985634042e88deb2f79f232047
parent92eb89bd630e822cfc93a07dad7d6c7a25f45d63 (diff)
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os_mon: Elucidate port program error messages
Try to avoid confusion of the message 'Erlang has closed' by clarifying that the message is sent from os_mon port programs.
-rw-r--r--lib/os_mon/c_src/cpu_sup.c14
-rw-r--r--lib/os_mon/c_src/memsup.c25
-rw-r--r--lib/os_mon/c_src/win32sysinfo.c30
3 files changed, 37 insertions, 32 deletions
diff --git a/lib/os_mon/c_src/cpu_sup.c b/lib/os_mon/c_src/cpu_sup.c
index 9c5f9a6aa5..a0432b3093 100644
--- a/lib/os_mon/c_src/cpu_sup.c
+++ b/lib/os_mon/c_src/cpu_sup.c
@@ -458,8 +458,18 @@ static void error(char* err_msg) {
* if we get error here we have trouble,
* silence unnecessary warnings
*/
- if(write(FD_ERR, err_msg, strlen(err_msg)));
- if(write(FD_ERR, "\n", 1));
+ char buffer[256] = "[os_mon] cpu supervisor port (cpu_sup): ";
+ int i = strlen(buffer), j = 0;
+ int n = strlen(err_msg);
+
+ while(i < 253 && j < n) {
+ buffer[i++] = err_msg[j++];
+ }
+ buffer[i++] = '\r';
+ buffer[i++] = '\n';
+
+ /* try to use one write only */
+ if(write(FD_ERR, buffer, i));
exit(-1);
}
diff --git a/lib/os_mon/c_src/memsup.c b/lib/os_mon/c_src/memsup.c
index 078f20ff98..593a066f98 100644
--- a/lib/os_mon/c_src/memsup.c
+++ b/lib/os_mon/c_src/memsup.c
@@ -493,7 +493,7 @@ get_basic_mem(unsigned long *tot, unsigned long *used, unsigned long *pagesize){
#elif defined(__linux__) && !defined(_SC_AVPHYS_PAGES)
memory_ext me;
if (get_mem_procfs(&me) < 0) {
- print_error("ProcFS read error.");
+ print_error("ProcFS read error");
exit(1);
}
*tot = me.total;
@@ -582,7 +582,7 @@ message_loop(int erlin_fd)
* Wait for command from Erlang
*/
if ((res = read(erlin_fd, &cmdLen, 1)) < 0) {
- print_error("Error reading from Erlang.");
+ print_error("Error reading from Erlang");
return;
}
@@ -603,19 +603,19 @@ message_loop(int erlin_fd)
break;
case 0:
- print_error("Erlang has closed.");
+ print_error("Erlang has closed");
return;
default:
- print_error("Error reading from Erlang.");
+ print_error("Error reading from Erlang");
return;
} /* switch() */
} else { /* cmdLen != 1 */
- print_error("Invalid command length (%d) received.", cmdLen);
+ print_error("Invalid command length (%d) received", cmdLen);
return;
}
} else { /* Erlang end closed */
- print_error("Erlang has closed.");
+ print_error("Erlang has closed");
return;
}
}
@@ -641,15 +641,12 @@ static void
print_error(const char *format,...)
{
va_list args;
+ char buffer[256];
va_start(args, format);
- fprintf(stderr, "%s: ", program_name);
- vfprintf(stderr, format, args);
+ vsnprintf(buffer, 256, format, args);
va_end(args);
- fprintf(stderr, " \n");
+ /* try to use one write only */
+ fprintf(stderr, "[os_mon] memory supervisor port (memsup): %s\r\n", buffer);
+ fflush(stderr);
}
-
-
-
-
-
diff --git a/lib/os_mon/c_src/win32sysinfo.c b/lib/os_mon/c_src/win32sysinfo.c
index 2a155aae87..9d4587393f 100644
--- a/lib/os_mon/c_src/win32sysinfo.c
+++ b/lib/os_mon/c_src/win32sysinfo.c
@@ -89,6 +89,7 @@ typedef BOOL (WINAPI *tfpGetDiskFreeSpaceEx)(LPCTSTR, PULARGE_INTEGER,PULARGE_IN
static tfpGetDiskFreeSpaceEx fpGetDiskFreeSpaceEx;
+static void print_error(const char *msg);
static void
return_answer(char* value)
{
@@ -98,7 +99,7 @@ return_answer(char* value)
res = write(1,(char*) &bytes,1);
if (res != 1) {
- fprintf(stderr,"win32sysinfo:Error writing to pipe");
+ print_error("Error writing to pipe");
exit(1);
}
@@ -107,9 +108,8 @@ return_answer(char* value)
while (left > 0)
{
res = write(1, value+bytes-left, left);
- if (res <= 0)
- {
- fprintf(stderr,"win32sysinfo:Error writing to pipe");
+ if (res <= 0) {
+ print_error("Error writing to pipe");
exit(1);
}
left -= res;
@@ -248,7 +248,6 @@ message_loop()
char cmd[512];
int res;
- fprintf(stderr,"in message_loop\n");
/* Startup ACK. */
return_answer(OK);
while (1)
@@ -257,12 +256,12 @@ message_loop()
* Wait for command from Erlang
*/
if ((res = read(0, &cmdLen, 1)) < 0) {
- fprintf(stderr,"win32sysinfo:Error reading from Erlang.");
+ print_error("Error reading from Erlang");
return;
}
if (res != 1){ /* Exactly one byte read ? */
- fprintf(stderr,"win32sysinfo:Erlang has closed.");
+ print_error("Erlang has closed");
return;
}
if ((res = read(0, &cmd, cmdLen)) == cmdLen){
@@ -291,11 +290,11 @@ message_loop()
return_answer("xEND");
}
else if (res == 0) {
- fprintf(stderr,"win32sysinfo:Erlang has closed.");
+ print_error("Erlang has closed");
return;
}
else {
- fprintf(stderr,"win32sysinfo:Error reading from Erlang.");
+ print_error("Error reading from Erlang");
return;
}
}
@@ -309,10 +308,9 @@ int main(int argc, char ** argv){
message_loop();
return 0;
}
-
-
-
-
-
-
-
+static void
+print_error(const char *msg) {
+ /* try to use one write only */
+ fprintf(stderr, "[os_mon] win32 supervisor port (win32sysinfo): %s\r\n", msg);
+ fflush(stderr);
+}