diff options
| -rw-r--r-- | src/GipfelWidget.cxx | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/GipfelWidget.cxx b/src/GipfelWidget.cxx index d2fe69c..44134f8 100644 --- a/src/GipfelWidget.cxx +++ b/src/GipfelWidget.cxx @@ -28,6 +28,7 @@ #include <stdlib.h> #include <sys/types.h> #include <sys/wait.h> +#include <sys/stat.h> #include <fcntl.h> #include <errno.h> #include <math.h> @@ -147,12 +148,26 @@ GipfelWidget::save_image(char *file) { char buf[1024]; int status; size_t n; + struct stat in_stat, out_stat; if (img_file == NULL) { fprintf(stderr, "Nothing to save\n"); return 1; } + if (stat(img_file, &in_stat) != 0) { + perror("stat"); + return 1; + } + + if (stat(file, &out_stat) == 0) { + if (in_stat.st_ino == out_stat.st_ino) { + fprintf(stderr, "Input image %s and output image %s are the same file\n", + img_file, file); + return 1; + } + } + out = fopen(file, "w"); if (out == NULL) { perror("fopen"); |