X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fprocess.c;h=3d6c11ae2018079d00096978d2b3b97df6b3b5a6;hb=b5d29991cc4722aec39c346c3f82291581e92aa0;hp=8263437c136ce2c86d94937ae96cd6a006f24791;hpb=fe81a2987abeda195f6535cab973b1c753cca4b3;p=openvswitch

diff --git a/lib/process.c b/lib/process.c
index 8263437c..3d6c11ae 100644
--- a/lib/process.c
+++ b/lib/process.c
@@ -30,6 +30,7 @@
 #include "fatal-signal.h"
 #include "list.h"
 #include "poll-loop.h"
+#include "signals.h"
 #include "socket-util.h"
 #include "util.h"
 #include "vlog.h"
@@ -81,9 +82,7 @@ process_init(void)
     inited = true;
 
     /* Create notification pipe. */
-    if (pipe(fds)) {
-        ovs_fatal(errno, "could not create pipe");
-    }
+    xpipe(fds);
     set_nonblocking(fds[0]);
     set_nonblocking(fds[1]);
 
@@ -92,9 +91,7 @@ process_init(void)
     sa.sa_handler = sigchld_handler;
     sigemptyset(&sa.sa_mask);
     sa.sa_flags = SA_NOCLDSTOP | SA_RESTART;
-    if (sigaction(SIGCHLD, &sa, NULL)) {
-        ovs_fatal(errno, "sigaction(SIGCHLD) failed");
-    }
+    xsigaction(SIGCHLD, &sa, NULL);
 }
 
 char *
@@ -353,17 +350,10 @@ process_status_msg(int status)
     struct ds ds = DS_EMPTY_INITIALIZER;
     if (WIFEXITED(status)) {
         ds_put_format(&ds, "exit status %d", WEXITSTATUS(status));
-    } else if (WIFSIGNALED(status) || WIFSTOPPED(status)) {
-        int signr = WIFSIGNALED(status) ? WTERMSIG(status) : WSTOPSIG(status);
-        const char *name = NULL;
-#ifdef HAVE_STRSIGNAL
-        name = strsignal(signr);
-#endif
-        ds_put_format(&ds, "%s by signal %d",
-                      WIFSIGNALED(status) ? "killed" : "stopped", signr);
-        if (name) {
-            ds_put_format(&ds, " (%s)", name);
-        }
+    } else if (WIFSIGNALED(status)) {
+        ds_put_format(&ds, "killed (%s)", signal_name(WTERMSIG(status)));
+    } else if (WIFSTOPPED(status)) {
+        ds_put_format(&ds, "stopped (%s)", signal_name(WSTOPSIG(status)));
     } else {
         ds_put_format(&ds, "terminated abnormally (%x)", status);
     }
@@ -413,13 +403,15 @@ process_search_path(const char *name)
 /* process_run_capture() and supporting functions. */
 
 struct stream {
+    size_t max_size;
     struct ds log;
     int fds[2];
 };
 
 static int
-stream_open(struct stream *s)
+stream_open(struct stream *s, size_t max_size)
 {
+    s->max_size = max_size;
     ds_init(&s->log);
     if (pipe(s->fds)) {
         VLOG_WARN("failed to create pipe: %s", strerror(errno));
@@ -453,9 +445,9 @@ stream_read(struct stream *s)
                 }
                 break;
             }
-        } else if (s->log.length > PROCESS_MAX_CAPTURE) {
-            VLOG_WARN("subprocess output overflowed %d-byte buffer",
-                      PROCESS_MAX_CAPTURE);
+        } else if (s->log.length > s->max_size) {
+            VLOG_WARN("subprocess output overflowed %zu-byte buffer",
+                      s->max_size);
             break;
         }
     }
@@ -490,7 +482,7 @@ stream_close(struct stream *s)
  * '*status'.
  *
  * If 'stdout_log' is nonnull, then the subprocess's output to stdout (up to a
- * limit of PROCESS_MAX_CAPTURE bytes) is captured in a memory buffer, which
+ * limit of 'log_max' bytes) is captured in a memory buffer, which
  * when this function returns 0 is stored as a null-terminated string in
  * '*stdout_log'.  The caller is responsible for freeing '*stdout_log' (by
  * passing it to free()).  When this function returns an error, '*stdout_log'
@@ -500,7 +492,7 @@ stream_close(struct stream *s)
  * that it captures the subprocess's output to stderr. */
 int
 process_run_capture(char **argv, char **stdout_log, char **stderr_log,
-                    int *status)
+                    size_t max_log, int *status)
 {
     struct stream s_stdout, s_stderr;
     sigset_t oldsigs;
@@ -520,12 +512,12 @@ process_run_capture(char **argv, char **stdout_log, char **stderr_log,
         return error;
     }
 
-    error = stream_open(&s_stdout);
+    error = stream_open(&s_stdout, max_log);
     if (error) {
         return error;
     }
 
-    error = stream_open(&s_stderr);
+    error = stream_open(&s_stderr, max_log);
     if (error) {
         stream_close(&s_stdout);
         return error;
@@ -644,9 +636,8 @@ static bool
 sigchld_is_blocked(void)
 {
     sigset_t sigs;
-    if (sigprocmask(SIG_SETMASK, NULL, &sigs)) {
-        ovs_fatal(errno, "sigprocmask");
-    }
+
+    xsigprocmask(SIG_SETMASK, NULL, &sigs);
     return sigismember(&sigs, SIGCHLD);
 }
 
@@ -654,17 +645,14 @@ static void
 block_sigchld(sigset_t *oldsigs)
 {
     sigset_t sigchld;
+
     sigemptyset(&sigchld);
     sigaddset(&sigchld, SIGCHLD);
-    if (sigprocmask(SIG_BLOCK, &sigchld, oldsigs)) {
-        ovs_fatal(errno, "sigprocmask");
-    }
+    xsigprocmask(SIG_BLOCK, &sigchld, oldsigs);
 }
 
 static void
 unblock_sigchld(const sigset_t *oldsigs)
 {
-    if (sigprocmask(SIG_SETMASK, oldsigs, NULL)) {
-        ovs_fatal(errno, "sigprocmask");
-    }
+    xsigprocmask(SIG_SETMASK, oldsigs, NULL);
 }