uint16_t size = strlen(msg1) + strlen(msg2) + strlen(msg3) + strlen(msg4)
+ strlen(f) + strlen(path) + strlen(mode) + 1;
char * msg = try_malloc(size, f_name);
- sprintf(msg, "%s%s%s%s%s%s%s", msg1, f, msg2, mode, msg3, path, msg4);
+ int test = sprintf(msg, "%s%s%s%s%s%s%s", msg1,f,msg2,mode,msg3,path,msg4);
+ exit_trouble(test < 0, f_name, "sprintf()");
FILE * file_p = fopen(path, mode);
exit_err(NULL == file_p, msg);
free(msg);
-extern void try_fclose_unlink_rename(FILE * file, char * p1, char * p2,
- char * f)
+extern FILE * atomic_write_start(char * path, char ** path_tmp)
{
- char * f_name = "try_fclose_unlink_rename()";
- try_fclose(file, f);
+ char * f_name = "atomic_write_start()";
+ char * suffix_tmp = "_tmp";
+ uint16_t size = strlen(path) + strlen(suffix_tmp) + 1;
+ *path_tmp = try_malloc(size, f_name);
+ int test = sprintf(*path_tmp, "%s%s", path, suffix_tmp);
+ exit_trouble(test < 0, f_name, "sprintf()");
+ return try_fopen(*path_tmp, "w", f_name);
+}
+
+
+
+extern void atomic_write_finish(FILE * file, char * path, char * path_tmp)
+{
+ char * f_name = "atomic_write_finish()";
+ try_fclose(file, f_name);
char * msg1 = "Trouble in ";
char * msg4 = "'.";
- if (!access(p2, F_OK))
+ if (!access(path, F_OK))
{
char * msg2 = " with unlink() on path '";
uint16_t size = strlen(msg1) + strlen(msg2) + strlen(msg4)
- + strlen(f) + strlen(p2) + 1;
+ + strlen(f_name) + strlen(path) + 1;
char * msg = try_malloc(size, f_name);
- sprintf(msg, "%s%s%s%s%s", msg1, f, msg2, p2, msg4);
- exit_err(unlink(p2), msg);
+ int test = sprintf(msg, "%s%s%s%s%s", msg1, f_name, msg2, path, msg4);
+ exit_trouble(test < 0, f_name, "sprintf()");
+ exit_err(unlink(path), msg);
free(msg);
}
char * msg2 = " with rename() from '";
char * msg3 = "' to '";
- uint16_t size = strlen(msg1) + strlen(f) + strlen(msg2) + strlen(p1)
- + strlen(msg3) + strlen(p2) + strlen(msg4) + 1;
+ uint16_t size = strlen(msg1) + strlen(f_name) + strlen(msg2) +
+ + strlen(path_tmp) + strlen(msg3) + strlen(path)
+ + strlen(msg4) + 1;
char * msg = try_malloc(size, f_name);
- sprintf(msg, "%s%s%s%s%s%s%s", msg1, f, msg2, p1, msg3, p2, msg4);
- exit_err(rename(p1, p2), msg);
+ int test = sprintf(msg, "%s%s%s%s%s%s%s",
+ msg1, f_name, msg2, path_tmp, msg3, path, msg4);
+ exit_trouble(test < 0, f_name, "sprintf()");
+ exit_err(rename(path_tmp, path), msg);
free(msg);
+ free(path_tmp);
}