2 * logfile.c --- set up e2fsck log files
4 * Copyright 1996, 1997 by Theodore Ts'o
7 * This file may be redistributed under the terms of the GNU Public
16 #include <sys/types.h>
23 extern e2fsck_t e2fsck_global_ctx; /* Try your very best not to use this! */
31 static void alloc_string(struct string *s, int len)
34 /* e2fsck_allocate_memory(ctx, len, "logfile name"); */
35 s->len = s->s ? len : 0;
39 static void append_string(struct string *s, const char *a, int len)
46 needlen = s->end + len + 1;
47 if (needlen > s->len) {
50 if (s->len * 2 > needlen)
52 n = realloc(s->s, needlen);
58 /* Don't append if we ran out of memory */
62 memcpy(s->s + s->end, a, len);
67 #define FLAG_UTC 0x0001
69 static void expand_percent_expression(e2fsck_t ctx, char ch,
70 struct string *s, int *flags)
72 struct tm *tm = NULL, tm_struct;
73 struct passwd *pw = NULL, pw_struct;
77 if ((ch == 'D') || (ch == 'd') || (ch == 'm') || (ch == 'y') ||
79 (ch == 'T') || (ch == 'H') || (ch == 'M') || (ch == 'S')) {
81 tm = (*flags & FLAG_UTC) ? gmtime_r(&ctx->now, &tm_struct) :
82 localtime_r(&ctx->now, &tm_struct);
87 append_string(s, "%", 1);
90 sprintf(buf, "%02d", tm->tm_mday);
93 sprintf(buf, "%d%02d%02d", tm->tm_year + 1900, tm->tm_mon + 1,
98 strcpy(buf, "server");
101 gethostname(buf, sizeof(buf));
102 buf[sizeof(buf)-1] = 0;
106 sprintf(buf, "%02d", tm->tm_hour);
109 sprintf(buf, "%02d", tm->tm_mon + 1);
112 sprintf(buf, "%02d", tm->tm_min);
114 case 'N': /* block device name */
115 cp = strrchr(ctx->filesystem_name, '/');
119 cp = ctx->filesystem_name;
120 append_string(s, cp, 0);
123 sprintf(buf, "%lu", (unsigned long) getpid());
126 sprintf(buf, "%lu", (unsigned long) ctx->now);
129 sprintf(buf, "%02d", tm->tm_sec);
132 sprintf(buf, "%02d%02d%02d", tm->tm_hour, tm->tm_min,
137 strcpy(buf, "tytso");
140 #ifdef HAVE_GETPWUID_R
141 getpwuid_r(getuid(), &pw_struct, buf, sizeof(buf), &pw);
143 pw = getpwuid(getuid());
146 append_string(s, pw->pw_name, 0);
153 sprintf(buf, "%02d", tm->tm_year % 100);
156 sprintf(buf, "%d", tm->tm_year + 1900);
159 sprintf(buf, "%%%c", ch);
162 append_string(s, buf, 0);
165 static void expand_logfn(e2fsck_t ctx, const char *log_fn, struct string *s)
171 alloc_string(s, 100);
172 for (cp = log_fn; *cp; cp++) {
175 expand_percent_expression(ctx, *cp, s, &flags);
178 for (i = 0; cp[i]; i++)
181 append_string(s, cp, i);
186 static int outbufsize;
189 static int do_read(int fd)
195 c = read(fd, buffer, sizeof(buffer)-1);
199 n = realloc(outbuf, outbufsize + c);
202 memcpy(((char *)outbuf)+outbufsize, buffer, c);
209 * Fork a child process to save the output of the logfile until the
210 * appropriate file system is mounted read/write.
212 static FILE *save_output(const char *s0, const char *s1, const char *s2)
226 /* At least one potential output file name is valid */
227 if (!s0 && !s1 && !s2)
241 if (e2fsck_global_ctx && e2fsck_global_ctx->progress_fd)
242 close(e2fsck_global_ctx->progress_fd);
243 if (daemon(0, 0) < 0) {
248 * Grab the output from our parent
251 while (do_read(fds[0]) > 0)
255 /* OK, now let's try to open the output file */
259 fd = open(s0, O_WRONLY|O_CREAT|O_TRUNC, 0644);
261 fd = open(s1, O_WRONLY|O_CREAT|O_TRUNC, 0644);
263 fd = open(s2, O_WRONLY|O_CREAT|O_TRUNC, 0644);
270 while (outbufsize > 0) {
271 c = write(fd, cp, outbufsize);
273 if ((errno == EAGAIN) || (errno == EINTR))
284 ret = fdopen(fds[1], "w");
291 static FILE *set_up_log_file(e2fsck_t ctx, const char *key, const char *fn)
294 struct string s, s1, s2;
295 char *s0 = 0, *log_dir = 0, *log_fn = 0;
296 int log_dir_wait = 0;
298 s.s = s1.s = s2.s = 0;
300 profile_get_boolean(ctx->profile, "options", "log_dir_wait", 0, 0,
303 log_fn = string_copy(ctx, fn, 0);
305 profile_get_string(ctx->profile, "options", key,
307 profile_get_string(ctx->profile, "options", "log_dir", 0, 0, &log_dir);
309 if (!log_fn || !log_fn[0])
312 expand_logfn(ctx, log_fn, &s);
313 if ((log_fn[0] == '/') || !log_dir || !log_dir[0])
316 if (log_dir && log_dir[0]) {
317 alloc_string(&s1, strlen(log_dir) + strlen(s.s) + 2);
318 append_string(&s1, log_dir, 0);
319 append_string(&s1, "/", 1);
320 append_string(&s1, s.s, 0);
324 profile_get_string(ctx->profile, "options", "log_dir_fallback", 0, 0,
326 if (log_dir && log_dir[0]) {
327 alloc_string(&s2, strlen(log_dir) + strlen(s.s) + 2);
328 append_string(&s2, log_dir, 0);
329 append_string(&s2, "/", 1);
330 append_string(&s2, s.s, 0);
331 printf("%s\n", s2.s);
337 f = fopen(s1.s, "w");
339 f = fopen(s2.s, "w");
340 if (!f && log_dir_wait)
341 f = save_output(s0, s1.s, s2.s);
352 void set_up_logging(e2fsck_t ctx)
354 ctx->logf = set_up_log_file(ctx, "log_filename", ctx->log_fn);
355 ctx->problem_logf = set_up_log_file(ctx, "problem_log_filename",
356 ctx->problem_log_fn);
359 void *e2fsck_allocate_memory(e2fsck_t ctx, unsigned long size,
360 const char *description)
367 sprintf(buf, "Can't allocate %s\n", description);
370 memset(ret, 0, size);
374 errcode_t e2fsck_allocate_context(e2fsck_t *ret)
380 context = malloc(sizeof(struct e2fsck_struct));
384 memset(context, 0, sizeof(struct e2fsck_struct));
386 context->now = 1332006474;
388 context->filesystem_name = "/dev/sda3";
389 context->device_name = "fslabel";
395 int main(int argc, char **argv)
400 putenv("TZ=EST+5:00");
401 e2fsck_allocate_context(&ctx);
402 expand_logfn(ctx, "e2fsck-%N.%h.%u.%D-%T", &s);
405 expand_logfn(ctx, "e2fsck-%N.%h.%u.%Y%m%d-%H%M%S", &s);