5 files changed, 15 insertions, 0 deletions
diff --git a/src/glsl/apps/compile.c b/src/glsl/apps/compile.c
index 5073b0da82..3aa4fd4d53 100644
--- a/src/glsl/apps/compile.c
+++ b/src/glsl/apps/compile.c
@@ -82,6 +82,9 @@ main(int argc,
    fseek(in, 0, SEEK_END);
    size = ftell(in);
    assert(size != -1);
+   if (size == -1) {
+      return 1;
+   }
    fseek(in, 0, SEEK_SET);
 
    out = fopen(argv[3], "w");
diff --git a/src/glsl/apps/process.c b/src/glsl/apps/process.c
index c8a1a1868c..caf72a71cf 100644
--- a/src/glsl/apps/process.c
+++ b/src/glsl/apps/process.c
@@ -59,6 +59,9 @@ main(int argc,
    fseek(in, 0, SEEK_END);
    size = ftell(in);
    assert(size != -1);
+   if (size == -1) {
+      return 1;
+   }
    fseek(in, 0, SEEK_SET);
 
    out = fopen(argv[2], "wb");
diff --git a/src/glsl/apps/purify.c b/src/glsl/apps/purify.c
index 5ab6bae96d..0f09b157ef 100644
--- a/src/glsl/apps/purify.c
+++ b/src/glsl/apps/purify.c
@@ -58,6 +58,9 @@ main(int argc,
    fseek(in, 0, SEEK_END);
    size = ftell(in);
    assert(size != -1);
+   if (size == -1) {
+      return 1;
+   }
    fseek(in, 0, SEEK_SET);
 
    out = fopen(argv[2], "wb");
diff --git a/src/glsl/apps/tokenise.c b/src/glsl/apps/tokenise.c
index b4c6d60930..f89f47d061 100644
--- a/src/glsl/apps/tokenise.c
+++ b/src/glsl/apps/tokenise.c
@@ -58,6 +58,9 @@ main(int argc,
    fseek(in, 0, SEEK_END);
    size = ftell(in);
    assert(size != -1);
+   if (size == -1) {
+      return 1;
+   }
    fseek(in, 0, SEEK_SET);
 
    out = fopen(argv[2], "wb");
diff --git a/src/glsl/apps/version.c b/src/glsl/apps/version.c
index 9820ad94dc..fa5c226da8 100644
--- a/src/glsl/apps/version.c
+++ b/src/glsl/apps/version.c
@@ -57,6 +57,9 @@ main(int argc,
    fseek(in, 0, SEEK_END);
    size = ftell(in);
    assert(size != -1);
+   if (size == -1) {
+      return 1;
+   }
    fseek(in, 0, SEEK_SET);
 
    out = fopen(argv[2], "wb");