root/compat/fopen.c

DEFINITIONS

1. git_fopen

/*
 *  The order of the following two lines is important.
 *
 *  FREAD_READS_DIRECTORIES is undefined before including git-compat-util.h
 *  to avoid the redefinition of fopen within git-compat-util.h. This is
 *  necessary since fopen is a macro on some platforms which may be set
 *  based on compiler options. For example, on AIX fopen is set to fopen64
 *  when _LARGE_FILES is defined. The previous technique of merely undefining
 *  fopen after including git-compat-util.h is inadequate in this case.
 */
#undef FREAD_READS_DIRECTORIES
#include "../git-compat-util.h"

FILE *git_fopen(const char *path, const char *mode)
{
        FILE *fp;
        struct stat st;

        if (mode[0] == 'w' || mode[0] == 'a')
                return fopen(path, mode);

        if (!(fp = fopen(path, mode)))
                return NULL;

        if (fstat(fileno(fp), &st)) {
                fclose(fp);
                return NULL;
        }

        if (S_ISDIR(st.st_mode)) {
                fclose(fp);
                errno = EISDIR;
                return NULL;
        }

        return fp;
}