1 #define NULL ((void*)0)
2 typedef __SIZE_TYPE__ size_t;
3
4 extern int errno;
5
6 extern void free (void *);
7 char *strdup (const char *)
8 __attribute__((malloc (free)));
9
10 extern size_t strlen (const char *__s)
11 __attribute__ ((__nothrow__ , __leaf__))
12 __attribute__ ((__pure__))
13 __attribute__ ((__nonnull__ (1)));
14
15 extern void error (int __status, int __errnum, const char *__format, ...)
16 __attribute__ ((__format__ (__printf__, 3, 4)));
17
18 extern void error_at_line (int __status, int __errnum, const char *__fname,
19 unsigned int __lineno, const char *__format, ...)
20 __attribute__ ((__format__ (__printf__, 5, 6)));
21
22 /* PR analyzer/99196; extract taken from
23 https://github.com/libguestfs/libguestfs/blob/f19fd566f6387ce7e4d82409528c9dde374d25e0/daemon/tar.c#L108
24 (which is GPLv2 or later). */
25
26 extern char *read_whole_file (const char *error_file, size_t *out);
27
28 #define EXIT_FAILURE 1
29
read_error_file(const char * error_file)30 char *read_error_file (const char *error_file)
31 {
32 size_t len;
33 char *str;
34
35 str = read_whole_file (error_file, &len);
36 if (str == NULL) {
37 str = strdup ("(no error)");
38 if (str == NULL)
39 error (EXIT_FAILURE, errno, "strdup");
40 len = strlen (str); /* { dg-bogus "NULL" } */
41 }
42
43 /* Remove trailing \n character if any. */
44 if (len > 0 && str[len-1] == '\n')
45 str[--len] = '\0';
46
47 return str; /* caller frees */
48 }
49