X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Fexec.c;h=26b8fa7ef4ae929fce16af725d91d030fd44c529;hb=c00630eab6161514c1044e8adb2895f179a535da;hp=162565224b2fdc9d5237bc91e3c026ddc25c9bb0;hpb=41532dee9fc88023e67d6a7e73d7d99617f5148f;p=collectd.git

diff --git a/src/exec.c b/src/exec.c
index 16256522..26b8fa7e 100644
--- a/src/exec.c
+++ b/src/exec.c
@@ -245,11 +245,17 @@ static int exec_config(oconfig_item_t *ci) /* {{{ */
   return 0;
 } /* int exec_config }}} */
 
+#if !defined(HAVE_SETENV)
+static char env_interval[64];
+// max hostname len is 255, so this should be enough
+static char env_hostname[300];
+#endif
+
 static void set_environment(void) /* {{{ */
 {
+#ifdef HAVE_SETENV
   char buffer[1024];
 
-#ifdef HAVE_SETENV
   snprintf(buffer, sizeof(buffer), "%.3f",
            CDTIME_T_TO_DOUBLE(plugin_get_interval()));
   setenv("COLLECTD_INTERVAL", buffer, /* overwrite = */ 1);
@@ -257,15 +263,29 @@ static void set_environment(void) /* {{{ */
   sstrncpy(buffer, hostname_g, sizeof(buffer));
   setenv("COLLECTD_HOSTNAME", buffer, /* overwrite = */ 1);
 #else
-  snprintf(buffer, sizeof(buffer), "COLLECTD_INTERVAL=%.3f",
+  snprintf(env_interval, sizeof(env_interval), "COLLECTD_INTERVAL=%.3f",
            CDTIME_T_TO_DOUBLE(plugin_get_interval()));
-  putenv(buffer);
+  putenv(env_interval);
 
-  snprintf(buffer, sizeof(buffer), "COLLECTD_HOSTNAME=%s", hostname_g);
-  putenv(buffer);
+  snprintf(env_hostname, sizeof(env_hostname), "COLLECTD_HOSTNAME=%s",
+           hostname_g);
+  putenv(env_hostname);
 #endif
 } /* }}} void set_environment */
 
+static void unset_environment(void) /* {{{ */
+{
+#ifdef HAVE_SETENV
+  unsetenv("COLLECTD_INTERVAL");
+  unsetenv("COLLECTD_HOSTNAME");
+#else
+  snprintf(env_interval, sizeof(env_interval), "COLLECTD_INTERVAL");
+  putenv(env_interval);
+  snprintf(env_hostname, sizeof(env_hostname), "COLLECTD_HOSTNAME");
+  putenv(env_hostname);
+#endif
+} /* }}} void unset_environment */
+
 __attribute__((noreturn)) static void exec_child(program_list_t *pl, int uid,
                                                  int gid, int egid) /* {{{ */
 {
@@ -359,8 +379,8 @@ static int getegr_id(program_list_t *pl, int gid) /* {{{ */
   if (pl->group == NULL) {
     return -1;
   }
-  if (strcmp(pl->group,"") == 0) {
-     return gid;
+  if (strcmp(pl->group, "") == 0) {
+    return gid;
   }
   struct group *gr_ptr = NULL;
   struct group gr;
@@ -376,22 +396,22 @@ static int getegr_id(program_list_t *pl, int gid) /* {{{ */
 
   do {
     temp = realloc(grbuf, grbuf_size);
-    if ( temp == NULL ) {
+    if (temp == NULL) {
       ERROR("exec plugin: getegr_id for %s: realloc buffer[%ld] failed ",
-                pl->group, grbuf_size);
+            pl->group, grbuf_size);
       sfree(grbuf);
       return -2;
     }
     grbuf = temp;
-    if(getgrnam_r(pl->group, &gr, grbuf, grbuf_size, &gr_ptr) == 0) {
+    if (getgrnam_r(pl->group, &gr, grbuf, grbuf_size, &gr_ptr) == 0) {
       sfree(grbuf);
       if (gr_ptr == NULL) {
-        ERROR("exec plugin: No such group: `%s'", pl->group);        
+        ERROR("exec plugin: No such group: `%s'", pl->group);
         return -1;
       }
       return gr.gr_gid;
-    } else if ( errno == ERANGE) {
-        grbuf_size += grbuf_size; // increment buffer size and try again
+    } else if (errno == ERANGE) {
+      grbuf_size += grbuf_size; // increment buffer size and try again
     } else {
       ERROR("exec plugin: getegr_id failed %s", STRERRNO);
       sfree(grbuf);
@@ -466,6 +486,8 @@ static int fork_child(program_list_t *pl, int *fd_in, int *fd_out,
     goto failed;
   }
 
+  set_environment();
+
   pid = fork();
   if (pid < 0) {
     ERROR("exec plugin: fork failed: %s", STRERRNO);
@@ -500,8 +522,6 @@ static int fork_child(program_list_t *pl, int *fd_in, int *fd_out,
       close(fd_pipe_err[1]);
     }
 
-    set_environment();
-
     /* Unblock all signals */
     reset_signal_mask();
 
@@ -509,6 +529,8 @@ static int fork_child(program_list_t *pl, int *fd_in, int *fd_out,
     /* does not return */
   }
 
+  unset_environment();
+
   close(fd_pipe_in[0]);
   close(fd_pipe_out[1]);
   close(fd_pipe_err[1]);
@@ -531,6 +553,8 @@ static int fork_child(program_list_t *pl, int *fd_in, int *fd_out,
   return pid;
 
 failed:
+  unset_environment();
+
   close_pipe(fd_pipe_in);
   close_pipe(fd_pipe_out);
   close_pipe(fd_pipe_err);