diff options
Diffstat (limited to 'lib/libalpm/remove.c')
| -rw-r--r-- | lib/libalpm/remove.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/lib/libalpm/remove.c b/lib/libalpm/remove.c index b965391e..cdc572d9 100644 --- a/lib/libalpm/remove.c +++ b/lib/libalpm/remove.c @@ -26,8 +26,11 @@ #include <errno.h> #include <string.h> #include <limits.h> +#include <dirent.h> +#include <regex.h> #include <unistd.h> #include <sys/stat.h> +#include <sys/types.h> /* libalpm */ #include "remove.h" @@ -299,6 +302,78 @@ static int can_remove_file(alpm_handle_t *handle, const alpm_file_t *file, return 1; } +static void shift_pacsave(alpm_handle_t *handle, const char *file) +{ + DIR *dir = NULL; + struct dirent *ent; + struct stat st; + regex_t reg; + + const char *basename; + char *dirname; + char oldfile[PATH_MAX]; + char newfile[PATH_MAX]; + char regstr[PATH_MAX]; + + unsigned long log_max = 0; + size_t basename_len; + + dirname = mdirname(file); + if(!dirname) { + return; + } + + basename = mbasename(file); + basename_len = strlen(basename); + + snprintf(regstr, PATH_MAX, "^%s\\.pacsave\\.([[:digit:]]+)$", basename); + if(regcomp(®, regstr, REG_EXTENDED | REG_NEWLINE) != 0) { + goto cleanup; + } + + dir = opendir(dirname); + if(dir == NULL) { + _alpm_log(handle, ALPM_LOG_ERROR, _("could not open directory: %s: %s\n"), + dirname, strerror(errno)); + goto cleanup; + } + + while((ent = readdir(dir)) != NULL) { + if(strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) { + continue; + } + + if(regexec(®, ent->d_name, 0, 0, 0) == 0) { + unsigned long cur_log; + cur_log = strtoul(ent->d_name + basename_len + strlen(".pacsave."), NULL, 10); + if(cur_log > log_max) { + log_max = cur_log; + } + } + } + + /* Shift pacsaves */ + unsigned long i; + for(i = log_max + 1; i > 1; i--) { + snprintf(oldfile, PATH_MAX, "%s.pacsave.%lu", file, i-1); + snprintf(newfile, PATH_MAX, "%s.pacsave.%lu", file, i); + rename(oldfile, newfile); + } + + snprintf(oldfile, PATH_MAX, "%s.pacsave", file); + if(stat(oldfile, &st) == 0) { + snprintf(newfile, PATH_MAX, "%s.1", oldfile); + rename(oldfile, newfile); + } + + regfree(®); + +cleanup: + free(dirname); + closedir(dir); +} + + /** * @brief Unlink a package file, backing it up if necessary. * @@ -399,6 +474,7 @@ static int unlink_file(alpm_handle_t *handle, alpm_pkg_t *oldpkg, char *newpath; size_t len = strlen(file) + 8 + 1; MALLOC(newpath, len, RET_ERR(handle, ALPM_ERR_MEMORY, -1)); + shift_pacsave(handle, file); snprintf(newpath, len, "%s.pacsave", file); if(rename(file, newpath)) { _alpm_log(handle, ALPM_LOG_ERROR, _("could not rename %s to %s (%s)\n"), |