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/* See LICENSE file for copyright and license details. */
#include "common.h"
static int
makedirs(char *path)
{
char *p, *last;
last = strrchr(path, '/');
if (!last)
return 0;
*last = '\0';
for (p = path; *p == '/'; p++);
while (*p) {
for (; *p && *p != '/'; p++);
*p = '\0';
if (mkdir(path, 0777) && errno != EEXIST) {
*last = *p = '/';
return -1;
}
for (*p++ = '/'; *p == '/'; p++);
}
*last = '/';
return 0;
}
int
libcontacts_save_contact(struct libcontacts_contact *contact, const struct passwd *user)
{
char *data = NULL, *path = NULL, *tmppath = NULL;
int oflags = O_WRONLY | O_CREAT | O_TRUNC;
int fd = -1, saved_errno = errno, dirs_created = 0;
ssize_t r;
size_t p, n, num = 0;
char *basenam = NULL;
if (libcontacts_format_contact(contact, &data))
goto fail;
if (!contact->id) {
oflags = O_WRONLY | O_CREAT | O_EXCL;
generate_id:
if (!num) {
if (!contact->name || !*contact->name) {
contact->id = strdup("unnamed");
if (!contact->id)
goto fail;
} else {
contact->id = strdup(contact->name);
if (!contact->id)
goto fail;
for (p = 0; contact->id[p]; p++) {
if (isalpha(contact->id[p]))
contact->id[p] = (char)tolower(contact->id[p]);
else
contact->id[p] = '-';
}
}
} else {
free(contact->id);
snprintf(NULL, 0, "%s-%zu%zn", basenam, num, &r);
contact->id = malloc((size_t)r + 1);
if (!contact->id)
goto fail;
sprintf(contact->id, "%s-%zu", basenam, num);
}
}
path = libcontacts_get_path(contact->id, user);
if (!path)
goto fail;
tmppath = malloc(strlen(path) + sizeof("~"));
stpcpy(stpcpy(tmppath, path), "~");
if (oflags & O_EXCL) {
open_excl_again:
fd = open(path, oflags, 0666);
if (fd < 0) {
if (errno == ENOENT && !dirs_created) {
if (makedirs(path))
goto fail;
dirs_created = 1;
goto open_excl_again;
}
if (errno != EEXIST)
goto fail;
if (!num++) {
basenam = contact->id;
contact->id = NULL;
}
free(path);
free(tmppath);
goto generate_id;
}
close(fd);
oflags ^= O_EXCL ^ O_TRUNC;
dirs_created = 1;
}
open_again:
fd = open(tmppath, oflags, 0666);
if (fd < 0) {
if (errno == ENOENT && !dirs_created) {
if (makedirs(path))
goto fail;
dirs_created = 1;
goto open_again;
}
goto fail;
}
n = strlen(data);
for (p = 0; p < n; p += (size_t)r) {
r = write(fd, &data[p], n - p);
if (r < 0)
goto fail;
}
if (fsync(fd))
goto fail;
if (close(fd)) {
fd = -1;
goto fail;
}
fd = -1;
if (rename(tmppath, path))
goto fail;
free(data);
free(path);
free(tmppath);
free(basenam);
errno = saved_errno;
return 0;
fail:
saved_errno = errno;
if (fd >= 0)
close(fd);
free(data);
free(path);
free(tmppath);
free(basenam);
errno = saved_errno;
return -1;
}
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