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97 lines
3.1 KiB
97 lines
3.1 KiB
7 years ago
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From 0d26e4514d7d6c90d2c5e35749c0b83121a66b77 Mon Sep 17 00:00:00 2001
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From: "mtasaka@fedoraproject.org" <mtasaka@fedoraproject.org>
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Date: Tue, 7 Feb 2017 16:40:52 +0900
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Subject: [PATCH] misc: kill gcc warn_unused_result warnings
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Remove misc warnings generated gcc -Wall with
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"warning: ignoring return value of 'foo',
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declared with attribute warn_unused_result".
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For setuid() and fgets(), really check the returned value.
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For system(), for now just use empty body to avoid this
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warning. Note that casting the result to (void) does not
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remove these warnings.
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---
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driver/demo-Gtk.c | 9 +++++++--
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hacks/glx/sonar-icmp.c | 2 +-
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hacks/glx/sonar.c | 5 +++--
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hacks/recanim.c | 6 +++++-
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4 files changed, 16 insertions(+), 6 deletions(-)
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diff --git a/driver/demo-Gtk.c b/driver/demo-Gtk.c
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index f5c4839..7c34846 100644
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--- a/driver/demo-Gtk.c
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+++ b/driver/demo-Gtk.c
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@@ -4423,7 +4423,8 @@ kde_screensaver_active_p (void)
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FILE *p = popen ("dcop kdesktop KScreensaverIface isEnabled 2>/dev/null",
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"r");
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char buf[255];
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- fgets (buf, sizeof(buf)-1, p);
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+ if (!p) return False;
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+ if (!fgets (buf, sizeof(buf)-1, p)) return False;
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pclose (p);
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if (!strcmp (buf, "true\n"))
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return True;
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@@ -4434,7 +4435,11 @@ kde_screensaver_active_p (void)
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static void
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kill_kde_screensaver (void)
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{
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- system ("dcop kdesktop KScreensaverIface enable false");
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+ /* Use empty body to kill warning from gcc -Wall with
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+ "warning: ignoring return value of 'system',
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+ declared with attribute warn_unused_result"
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+ */
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+ if (system ("dcop kdesktop KScreensaverIface enable false")) {}
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}
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diff --git a/hacks/glx/sonar-icmp.c b/hacks/glx/sonar-icmp.c
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index 8256270..26eb90d 100644
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--- a/hacks/glx/sonar-icmp.c
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+++ b/hacks/glx/sonar-icmp.c
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@@ -1634,7 +1634,7 @@ sonar_init_ping (Display *dpy, char **error_ret, char **desc_ret,
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fprintf (stderr, "%s: unable to open icmp socket\n", progname);
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/* Disavow privs */
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- setuid(getuid());
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+ if (setuid(getuid()) == -1) abort();
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pd->pid = getpid() & 0xFFFF;
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pd->seq = 0;
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diff --git a/hacks/glx/sonar.c b/hacks/glx/sonar.c
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index f3a4d9d..2c6ca5b 100644
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--- a/hacks/glx/sonar.c
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+++ b/hacks/glx/sonar.c
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@@ -930,8 +930,9 @@ init_sensor (ModeInfo *mi)
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sp->ssd = sonar_init_ping (MI_DISPLAY (mi), &sp->error, &sp->desc,
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ping_arg, ping_timeout, resolve_p, times_p,
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debug_p);
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- else
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- setuid(getuid()); /* Disavow privs if not pinging. */
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+ else {
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+ if (setuid(getuid()) == -1) abort(); /* Disavow privs if not pinging. */
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+ }
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sp->start_time = double_time (); /* for error message timing */
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diff --git a/hacks/recanim.c b/hacks/recanim.c
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index 51379ed..a526c25 100644
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--- a/hacks/recanim.c
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+++ b/hacks/recanim.c
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@@ -324,7 +324,11 @@ screenhack_record_anim_free (record_anim_state *st)
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" 2>&-",
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fn);
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fprintf (stderr, "%s: exec: %s\n", progname, cmd);
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- system (cmd);
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+ /* Use empty body to kill warning from gcc -Wall with
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+ "warning: ignoring return value of 'system',
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+ declared with attribute warn_unused_result"
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+ */
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+ if (system (cmd)) {}
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if (stat (fn, &s))
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{
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--
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2.9.3
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