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bootctl: modernize install_loader_config()

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let's the proper APIs to read the machine ID, and properly check for all
errors.
This commit is contained in:
Lennart Poettering 2016-07-19 20:48:22 +02:00
parent f939cff715
commit d5ff6d6d34
1 changed files with 18 additions and 26 deletions
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44
src/boot/bootctl.c
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@ -945,36 +945,28 @@ static int remove_variables(sd_id128_t uuid, const char *path, bool in_order) {
}
static int install_loader_config(const char *esp_path) {
char *p;
char line[64];
char *machine = NULL;
_cleanup_fclose_ FILE *f = NULL, *g = NULL;
f = fopen("/etc/machine-id", "re");
if (!f)
return errno == ENOENT ? 0 : -errno;
_cleanup_fclose_ FILE *f = NULL;
char machine_string[SD_ID128_STRING_MAX];
sd_id128_t machine_id;
const char *p;
int r;
if (fgets(line, sizeof(line), f) != NULL) {
char *s;
s = strchr(line, '\n');
if (s)
s[0] = '\0';
if (strlen(line) == 32)
machine = line;
}
if (!machine)
return -ESRCH;
r = sd_id128_get_machine(&machine_id);
if (r < 0)
return log_error_errno(r, "Failed to get machine did: %m");
p = strjoina(esp_path, "/loader/loader.conf");
g = fopen(p, "wxe");
if (g) {
fprintf(g, "#timeout 3\n");
fprintf(g, "default %s-*\n", machine);
if (ferror(g))
return log_error_errno(EIO, "Failed to write \"%s\": %m", p);
}
f = fopen(p, "wxe");
if (!f)
return log_error_errno(errno, "Failed to open loader.conf for writing: %m");
fprintf(f, "#timeout 3\n");
fprintf(f, "default %s-*\n", sd_id128_to_string(machine_id, machine_string));
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write \"%s\": %m", p);
return 0;
}