X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Futil.c;h=d12b5e772da601b9379e0c0efde09481564d7a56;hp=ec5c7ca91aacbb19c807015c402fc5baed38cba1;hb=22927a3654915670c6d2c7f2e60ea5f54cd2503d;hpb=6319292f15478f763777738c9a98faa99ae819c1 diff --git a/src/util.c b/src/util.c index ec5c7ca91..d12b5e772 100644 --- a/src/util.c +++ b/src/util.c @@ -1,4 +1,4 @@ -/*-*- Mode: C; c-basic-offset: 8 -*-*/ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. @@ -48,6 +48,8 @@ #include #include #include +#include +#include #include "macro.h" #include "util.h" @@ -55,261 +57,8 @@ #include "missing.h" #include "log.h" #include "strv.h" - -#ifdef HAVE_SELINUX -#include -#include - -static struct selabel_handle *label_hnd = NULL; - -static inline int use_selinux(void) { - static int use_selinux_ind = -1; - - if (use_selinux_ind == -1) - use_selinux_ind = (is_selinux_enabled() == 1); - - return use_selinux_ind; -} - -static int label_get_file_label_from_path( - const char *label, - const char *path, - const char *class, - security_context_t *fcon) { - - security_context_t dir_con = NULL; - security_class_t sclass; - int r = 0; - - r = getfilecon(path, &dir_con); - if (r >= 0) { - r = -1; - if ((sclass = string_to_security_class(class)) != 0) - r = security_compute_create((security_context_t) label, dir_con, sclass, fcon); - } - if (r < 0) - r = -errno; - - freecon(dir_con); - return r; -} - -#endif - -int label_init(void) { - int r = 0; - -#ifdef HAVE_SELINUX - - if (!use_selinux()) - return 0; - - label_hnd = selabel_open(SELABEL_CTX_FILE, NULL, 0); - if (!label_hnd) { - log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG, - "Failed to initialize SELinux context: %m"); - r = (security_getenforce() == 1) ? -errno : 0; - } -#endif - - return r; -} - -int label_fix(const char *path) { - int r = 0; - -#ifdef HAVE_SELINUX - struct stat st; - security_context_t fcon; - - if (!use_selinux() || !label_hnd) - return 0; - - r = lstat(path, &st); - if (r == 0) { - r = selabel_lookup_raw(label_hnd, &fcon, path, st.st_mode); - - if (r == 0) { - r = setfilecon(path, fcon); - freecon(fcon); - } - } - if (r < 0) { - log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG, - "Unable to fix label of %s: %m", path); - r = (security_getenforce() == 1) ? -errno : 0; - } -#endif - - return r; -} - -void label_finish(void) { - -#ifdef HAVE_SELINUX - if (use_selinux() && label_hnd) - selabel_close(label_hnd); -#endif -} - -int label_get_socket_label_from_exe(const char *exe, char **label) { - - int r = 0; - -#ifdef HAVE_SELINUX - security_context_t mycon = NULL, fcon = NULL; - security_class_t sclass; - - if (!use_selinux()) { - *label = NULL; - return 0; - } - - r = getcon(&mycon); - if (r < 0) - goto fail; - - r = getfilecon(exe, &fcon); - if (r < 0) - goto fail; - - sclass = string_to_security_class("process"); - r = security_compute_create(mycon, fcon, sclass, (security_context_t *) label); - if (r == 0) - log_debug("SELinux Socket context for %s will be set to %s", exe, *label); - -fail: - if (r < 0 && security_getenforce() == 1) - r = -errno; - - freecon(mycon); - freecon(fcon); -#endif - - return r; -} - -int label_fifofile_set(const char *label, const char *path) { - int r = 0; - -#ifdef HAVE_SELINUX - security_context_t filecon = NULL; - - if (!use_selinux() || !label) - return 0; - - if (((r = label_get_file_label_from_path(label, path, "fifo_file", &filecon)) == 0)) { - if ((r = setfscreatecon(filecon)) < 0) { - log_error("Failed to set SELinux file context (%s) on %s: %m", label, path); - r = -errno; - } - - freecon(filecon); - } - - if (r < 0 && security_getenforce() == 0) - r = 0; -#endif - - return r; -} - -int label_socket_set(const char *label) { - -#ifdef HAVE_SELINUX - if (!use_selinux()) - return 0; - - if (setsockcreatecon((security_context_t) label) < 0) { - log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG, - "Failed to set SELinux context (%s) on socket: %m", label); - - if (security_getenforce() == 1) - return -errno; - } -#endif - - return 0; -} - -void label_file_clear(void) { - -#ifdef HAVE_SELINUX - if (!use_selinux()) - return; - - setfscreatecon(NULL); -#endif -} - -void label_socket_clear(void) { - -#ifdef HAVE_SELINUX - if (!use_selinux()) - return; - - setsockcreatecon(NULL); -#endif -} - -void label_free(const char *label) { - -#ifdef HAVE_SELINUX - if (!use_selinux()) - return; - - freecon((security_context_t) label); -#endif -} - -static int label_mkdir( - const char *path, - mode_t mode) { - -#ifdef HAVE_SELINUX - int r; - security_context_t fcon = NULL; - - if (use_selinux() && label_hnd) { - if (path[0] == '/') { - r = selabel_lookup_raw(label_hnd, &fcon, path, mode); - } - else { - char *cwd = NULL; - char *newpath = NULL; - cwd = getcwd(NULL,0); - if ((! cwd) || (asprintf(&newpath, "%s/%s",cwd,path) < 0)) { - free(cwd); - return -errno; - } - r = selabel_lookup_raw(label_hnd, &fcon, newpath, mode); - free(cwd); - free(newpath); - } - - if (r == 0) - r = setfscreatecon(fcon); - - if ((r < 0) && (errno != ENOENT)) { - log_error("Failed to set security context %s for %s", fcon, path); - - if (security_getenforce() == 1) - goto finish; - } - } - r = mkdir(path, mode); - -finish: - if (use_selinux() && label_hnd) { - setfscreatecon(NULL); - freecon(fcon); - } - - return r; -#else - return mkdir(path, mode); -#endif -} +#include "label.h" +#include "exit-status.h" bool streq_ptr(const char *a, const char *b) { @@ -746,6 +495,9 @@ int write_one_line_file(const char *fn, const char *line) { goto finish; } + if (!endswith(line, "\n")) + fputc('\n', f); + r = 0; finish: fclose(f); @@ -755,7 +507,7 @@ finish: int read_one_line_file(const char *fn, char **line) { FILE *f; int r; - char t[2048], *c; + char t[LINE_MAX], *c; assert(fn); assert(line); @@ -781,6 +533,155 @@ finish: return r; } +int read_full_file(const char *fn, char **contents) { + FILE *f; + int r; + size_t n, l; + char *buf = NULL; + struct stat st; + + if (!(f = fopen(fn, "re"))) + return -errno; + + if (fstat(fileno(f), &st) < 0) { + r = -errno; + goto finish; + } + + n = st.st_size > 0 ? st.st_size : LINE_MAX; + l = 0; + + for (;;) { + char *t; + size_t k; + + if (!(t = realloc(buf, n+1))) { + r = -ENOMEM; + goto finish; + } + + buf = t; + k = fread(buf + l, 1, n - l, f); + + if (k <= 0) { + if (ferror(f)) { + r = -errno; + goto finish; + } + + break; + } + + l += k; + n *= 2; + + /* Safety check */ + if (n > 4*1024*1024) { + r = -E2BIG; + goto finish; + } + } + + if (buf) + buf[l] = 0; + else if (!(buf = calloc(1, 1))) { + r = -errno; + goto finish; + } + + *contents = buf; + buf = NULL; + + r = 0; + +finish: + fclose(f); + free(buf); + + return r; +} + +int parse_env_file( + const char *fname, + const char *separator, ...) { + + int r = 0; + char *contents, *p; + + assert(fname); + assert(separator); + + if ((r = read_full_file(fname, &contents)) < 0) + return r; + + p = contents; + for (;;) { + const char *key = NULL; + + p += strspn(p, separator); + p += strspn(p, WHITESPACE); + + if (!*p) + break; + + if (!strchr(COMMENTS, *p)) { + va_list ap; + char **value; + + va_start(ap, separator); + while ((key = va_arg(ap, char *))) { + size_t n; + char *v; + + value = va_arg(ap, char **); + + n = strlen(key); + if (strncmp(p, key, n) != 0 || + p[n] != '=') + continue; + + p += n + 1; + n = strcspn(p, separator); + + if (n >= 2 && + strchr(QUOTES, p[0]) && + p[n-1] == p[0]) + v = strndup(p+1, n-2); + else + v = strndup(p, n); + + if (!v) { + r = -ENOMEM; + va_end(ap); + goto fail; + } + + if (v[0] == '\0') { + /* return empty value strings as NULL */ + free(v); + v = NULL; + } + + free(*value); + *value = v; + + p += n; + + r ++; + break; + } + va_end(ap); + } + + if (!key) + p += strcspn(p, separator); + } + +fail: + free(contents); + return r; +} + char *truncate_nl(char *s) { assert(s); @@ -1783,6 +1684,8 @@ bool ignore_file(const char *filename) { return filename[0] == '.' || streq(filename, "lost+found") || + streq(filename, "aquota.user") || + streq(filename, "aquota.group") || endswith(filename, "~") || endswith(filename, ".rpmnew") || endswith(filename, ".rpmsave") || @@ -1911,6 +1814,63 @@ char *format_timestamp(char *buf, size_t l, usec_t t) { return buf; } +char *format_timestamp_pretty(char *buf, size_t l, usec_t t) { + usec_t n, d; + + n = now(CLOCK_REALTIME); + + if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t) + return NULL; + + d = n - t; + + if (d >= USEC_PER_YEAR) + snprintf(buf, l, "%llu years and %llu months ago", + (unsigned long long) (d / USEC_PER_YEAR), + (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH)); + else if (d >= USEC_PER_MONTH) + snprintf(buf, l, "%llu months and %llu days ago", + (unsigned long long) (d / USEC_PER_MONTH), + (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY)); + else if (d >= USEC_PER_WEEK) + snprintf(buf, l, "%llu weeks and %llu days ago", + (unsigned long long) (d / USEC_PER_WEEK), + (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY)); + else if (d >= 2*USEC_PER_DAY) + snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY)); + else if (d >= 25*USEC_PER_HOUR) + snprintf(buf, l, "1 day and %lluh ago", + (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR)); + else if (d >= 6*USEC_PER_HOUR) + snprintf(buf, l, "%lluh ago", + (unsigned long long) (d / USEC_PER_HOUR)); + else if (d >= USEC_PER_HOUR) + snprintf(buf, l, "%lluh %llumin ago", + (unsigned long long) (d / USEC_PER_HOUR), + (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE)); + else if (d >= 5*USEC_PER_MINUTE) + snprintf(buf, l, "%llumin ago", + (unsigned long long) (d / USEC_PER_MINUTE)); + else if (d >= USEC_PER_MINUTE) + snprintf(buf, l, "%llumin %llus ago", + (unsigned long long) (d / USEC_PER_MINUTE), + (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC)); + else if (d >= USEC_PER_SEC) + snprintf(buf, l, "%llus ago", + (unsigned long long) (d / USEC_PER_SEC)); + else if (d >= USEC_PER_MSEC) + snprintf(buf, l, "%llums ago", + (unsigned long long) (d / USEC_PER_MSEC)); + else if (d > 0) + snprintf(buf, l, "%lluus ago", + (unsigned long long) d); + else + snprintf(buf, l, "now"); + + buf[l-1] = 0; + return buf; +} + char *format_timespan(char *buf, size_t l, usec_t t) { static const struct { const char *suffix; @@ -1934,6 +1894,12 @@ char *format_timespan(char *buf, size_t l, usec_t t) { if (t == (usec_t) -1) return NULL; + if (t == 0) { + snprintf(p, l, "0"); + p[l-1] = 0; + return p; + } + /* The result of this function can be parsed with parse_usec */ for (i = 0; i < ELEMENTSOF(table); i++) { @@ -2054,23 +2020,29 @@ int read_one_char(FILE *f, char *ret, bool *need_nl) { } int ask(char *ret, const char *replies, const char *text, ...) { + bool on_tty; + assert(ret); assert(replies); assert(text); + on_tty = isatty(STDOUT_FILENO); + for (;;) { va_list ap; char c; int r; bool need_nl = true; - fputs("\x1B[1m", stdout); + if (on_tty) + fputs("\x1B[1m", stdout); va_start(ap, text); vprintf(text, ap); va_end(ap); - fputs("\x1B[0m", stdout); + if (on_tty) + fputs("\x1B[0m", stdout); fflush(stdout); @@ -2106,9 +2078,9 @@ int reset_terminal(int fd) { assert(fd >= 0); - /* First, unlock termios */ - zero(termios); - ioctl(fd, TIOCSLCKTRMIOS, &termios); + /* We leave locked terminal attributes untouched, so that + * Plymouth may set whatever it wants to set, and we don't + * interfere with that. */ /* Disable exclusive mode, just in case */ ioctl(fd, TIOCNXCL); @@ -2280,26 +2252,34 @@ int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocst assert(notify >= 0); for (;;) { - struct inotify_event e; + uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; ssize_t l; + struct inotify_event *e; - if ((l = read(notify, &e, sizeof(e))) != sizeof(e)) { + if ((l = read(notify, &inotify_buffer, sizeof(inotify_buffer))) < 0) { - if (l < 0) { + if (errno == EINTR) + continue; - if (errno == EINTR) - continue; + r = -errno; + goto fail; + } + + e = (struct inotify_event*) inotify_buffer; - r = -errno; - } else + while (l > 0) { + size_t step; + + if (e->wd != wd || !(e->mask & IN_CLOSE)) { r = -EIO; + goto fail; + } - goto fail; - } + step = sizeof(struct inotify_event) + e->len; + assert(step <= (size_t) l); - if (e.wd != wd || !(e.mask & IN_CLOSE)) { - r = -EIO; - goto fail; + e = (struct inotify_event*) ((uint8_t*) e + step); + l -= step; } break; @@ -2628,6 +2608,15 @@ int make_stdio(int fd) { return 0; } +int make_null_stdio(void) { + int null_fd; + + if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0) + return -errno; + + return make_stdio(null_fd); +} + bool is_clean_exit(int code, int status) { if (code == CLD_EXITED) @@ -2645,6 +2634,16 @@ bool is_clean_exit(int code, int status) { return false; } +bool is_clean_exit_lsb(int code, int status) { + + if (is_clean_exit(code, status)) + return true; + + return + code == CLD_EXITED && + (status == EXIT_NOTINSTALLED || status == EXIT_NOTCONFIGURED); +} + bool is_device_path(const char *path) { /* Returns true on paths that refer to a device, either in @@ -2740,18 +2739,6 @@ char* gethostname_malloc(void) { return strdup(u.sysname); } -int getmachineid_malloc(char **b) { - int r; - - assert(b); - - if ((r = read_one_line_file("/var/lib/dbus/machine-id", b)) < 0) - return r; - - strstrip(*b); - return 0; -} - char* getlogname_malloc(void) { uid_t uid; long bufsize; @@ -2790,11 +2777,12 @@ char* getlogname_malloc(void) { int getttyname_malloc(char **r) { char path[PATH_MAX], *p, *c; + int k; assert(r); - if (ttyname_r(STDIN_FILENO, path, sizeof(path)) < 0) - return -errno; + if ((k = ttyname_r(STDIN_FILENO, path, sizeof(path))) != 0) + return -k; char_array_0(path); @@ -2994,40 +2982,117 @@ void status_printf(const char *format, ...) { } void status_welcome(void) { + char *pretty_name = NULL, *ansi_color = NULL; + const char *const_pretty = NULL, *const_color = NULL; + int r; -#if defined(TARGET_FEDORA) - char *r; + if ((r = parse_env_file("/etc/os-release", NEWLINE, + "PRETTY_NAME", &pretty_name, + "ANSI_COLOR", &ansi_color, + NULL)) < 0) { - if (read_one_line_file("/etc/system-release", &r) < 0) - return; + if (r != -ENOENT) + log_warning("Failed to read /etc/os-release: %s", strerror(-r)); + } - truncate_nl(r); +#if defined(TARGET_FEDORA) + if (!pretty_name) { + if ((r = read_one_line_file("/etc/system-release", &pretty_name)) < 0) { - /* This tries to mimic the color magic the old Red Hat sysinit - * script did. */ + if (r != -ENOENT) + log_warning("Failed to read /etc/system-release: %s", strerror(-r)); + } else + truncate_nl(pretty_name); + } - if (startswith(r, "Red Hat")) - status_printf("Welcome to \x1B[0;31m%s\x1B[0m!\n", r); /* Red for RHEL */ - else if (startswith(r, "Fedora")) - status_printf("Welcome to \x1B[0;34m%s\x1B[0m!\n", r); /* Blue for Fedora */ - else - status_printf("Welcome to %s!\n", r); + if (!ansi_color && pretty_name) { - free(r); + /* This tries to mimic the color magic the old Red Hat sysinit + * script did. */ + + if (startswith(pretty_name, "Red Hat")) + const_color = "0;31"; /* Red for RHEL */ + else if (startswith(pretty_name, "Fedora")) + const_color = "0;34"; /* Blue for Fedora */ + } #elif defined(TARGET_SUSE) - char *r; - if (read_one_line_file("/etc/SuSE-release", &r) < 0) - return; + if (!pretty_name) { + if ((r = read_one_line_file("/etc/SuSE-release", &pretty_name)) < 0) { - truncate_nl(r); + if (r != -ENOENT) + log_warning("Failed to read /etc/SuSE-release: %s", strerror(-r)); + } else + truncate_nl(pretty_name); + } - status_printf("Welcome to \x1B[0;32m%s\x1B[0m!\n", r); /* Green for SUSE */ - free(r); -#else -#warning "You probably should add a welcome text logic here." + if (!ansi_color) + const_color = "0;32"; /* Green for openSUSE */ + +#elif defined(TARGET_GENTOO) + + if (!pretty_name) { + if ((r = read_one_line_file("/etc/gentoo-release", &pretty_name)) < 0) { + + if (r != -ENOENT) + log_warning("Failed to read /etc/gentoo-release: %s", strerror(-r)); + } else + truncate_nl(pretty_name); + } + + if (!ansi_color) + const_color = "1;34"; /* Light Blue for Gentoo */ + +#elif defined(TARGET_DEBIAN) + + if (!pretty_name) { + char *version; + if ((r = read_one_line_file("/etc/debian_version", &version)) < 0) { + + if (r != -ENOENT) + log_warning("Failed to read /etc/debian_version: %s", strerror(-r)); + } else { + truncate_nl(version); + pretty_name = strappend("Debian ", version); + free(version); + } + } + + if (!ansi_color) + const_color = "1;31"; /* Light Red for Debian */ + +#elif defined(TARGET_UBUNTU) + + if ((r = parse_env_file("/etc/lsb-release", NEWLINE, + "DISTRIB_DESCRIPTION", &pretty_name, + NULL)) < 0) { + + if (r != -ENOENT) + log_warning("Failed to read /etc/lsb-release: %s", strerror(-r)); + } + + if (!ansi_color) + const_color = "0;33"; /* Orange/Brown for Ubuntu */ + +#elif defined(TARGET_ARCH) + + if (!pretty_name) + const_pretty = "Arch Linux"; + + if (!ansi_color) + const_color = "1;36"; /* Cyan for Arch */ #endif + + if (!pretty_name && !const_pretty) + const_pretty = "Linux"; + + if (!ansi_color && !const_color) + const_color = "1"; + + status_printf("Welcome to \x1B[%sm%s\x1B[0m!\n", + const_color ? const_color : ansi_color, + const_pretty ? const_pretty : pretty_name); } char *replace_env(const char *format, char **env) { @@ -3077,18 +3142,18 @@ char *replace_env(const char *format, char **env) { case VARIABLE: if (*e == '}') { - char *t; + const char *t; - if ((t = strv_env_get_with_length(env, word+2, e-word-2))) { - if (!(k = strappend(r, t))) - goto fail; + if (!(t = strv_env_get_with_length(env, word+2, e-word-2))) + t = ""; - free(r); - r = k; + if (!(k = strappend(r, t))) + goto fail; - word = e+1; - } + free(r); + r = k; + word = e+1; state = WORD; } break; @@ -3118,36 +3183,39 @@ char **replace_env_argv(char **argv, char **env) { STRV_FOREACH(i, argv) { /* If $FOO appears as single word, replace it by the split up variable */ - if ((*i)[0] == '$') { - char *e = strv_env_get(env, *i+1); + if ((*i)[0] == '$' && (*i)[1] != '{') { + char *e; + char **w, **m; + unsigned q; - if (e) { - char **w, **m; - unsigned q; + if ((e = strv_env_get(env, *i+1))) { if (!(m = strv_split_quoted(e))) { r[k] = NULL; strv_free(r); return NULL; } + } else + m = NULL; - q = strv_length(m); - l = l + q - 1; + q = strv_length(m); + l = l + q - 1; - if (!(w = realloc(r, sizeof(char*) * (l+1)))) { - r[k] = NULL; - strv_free(r); - strv_free(m); - return NULL; - } + if (!(w = realloc(r, sizeof(char*) * (l+1)))) { + r[k] = NULL; + strv_free(r); + strv_free(m); + return NULL; + } - r = w; + r = w; + if (m) { memcpy(r + k, m, q * sizeof(char*)); free(m); - - k += q; - continue; } + + k += q; + continue; } /* If ${FOO} appears as part of a word, replace it by the variable as-is */ @@ -3175,7 +3243,7 @@ int columns(void) { struct winsize ws; zero(ws); - if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) >= 0) + if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) >= 0) parsed_columns = ws.ws_col; } @@ -3236,6 +3304,227 @@ char *ellipsize(const char *s, unsigned length, unsigned percent) { return r; } +int touch(const char *path) { + int fd; + + assert(path); + + if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0666)) < 0) + return -errno; + + close_nointr_nofail(fd); + return 0; +} + +char *unquote(const char *s, const char* quotes) { + size_t l; + assert(s); + + if ((l = strlen(s)) < 2) + return strdup(s); + + if (strchr(quotes, s[0]) && s[l-1] == s[0]) + return strndup(s+1, l-2); + + return strdup(s); +} + +int wait_for_terminate(pid_t pid, siginfo_t *status) { + assert(pid >= 1); + assert(status); + + for (;;) { + zero(*status); + + if (waitid(P_PID, pid, status, WEXITED) < 0) { + + if (errno == EINTR) + continue; + + return -errno; + } + + return 0; + } +} + +int wait_for_terminate_and_warn(const char *name, pid_t pid) { + int r; + siginfo_t status; + + assert(name); + assert(pid > 1); + + if ((r = wait_for_terminate(pid, &status)) < 0) { + log_warning("Failed to wait for %s: %s", name, strerror(-r)); + return r; + } + + if (status.si_code == CLD_EXITED) { + if (status.si_status != 0) { + log_warning("%s failed with error code %i.", name, status.si_status); + return -EPROTO; + } + + log_debug("%s succeeded.", name); + return 0; + + } else if (status.si_code == CLD_KILLED || + status.si_code == CLD_DUMPED) { + + log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); + return -EPROTO; + } + + log_warning("%s failed due to unknown reason.", name); + return -EPROTO; + +} + +void freeze(void) { + for (;;) + pause(); +} + +bool null_or_empty(struct stat *st) { + assert(st); + + if (S_ISREG(st->st_mode) && st->st_size <= 0) + return true; + + if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) + return true; + + return false; +} + +DIR *xopendirat(int fd, const char *name) { + return fdopendir(openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)); +} + +int signal_from_string_try_harder(const char *s) { + int signo; + assert(s); + + if ((signo = signal_from_string(s)) <= 0) + if (startswith(s, "SIG")) + return signal_from_string(s+3); + + return signo; +} + +void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) { + + assert(f); + assert(name); + assert(t); + + if (!dual_timestamp_is_set(t)) + return; + + fprintf(f, "%s=%llu %llu\n", + name, + (unsigned long long) t->realtime, + (unsigned long long) t->monotonic); +} + +void dual_timestamp_deserialize(const char *value, dual_timestamp *t) { + unsigned long long a, b; + + assert(value); + assert(t); + + if (sscanf(value, "%lli %llu", &a, &b) != 2) + log_debug("Failed to parse finish timestamp value %s", value); + else { + t->realtime = a; + t->monotonic = b; + } +} + +char *fstab_node_to_udev_node(const char *p) { + char *dn, *t, *u; + int r; + + /* FIXME: to follow udev's logic 100% we need to leave valid + * UTF8 chars unescaped */ + + if (startswith(p, "LABEL=")) { + + if (!(u = unquote(p+6, "\"\'"))) + return NULL; + + t = xescape(u, "/ "); + free(u); + + if (!t) + return NULL; + + r = asprintf(&dn, "/dev/disk/by-label/%s", t); + free(t); + + if (r < 0) + return NULL; + + return dn; + } + + if (startswith(p, "UUID=")) { + + if (!(u = unquote(p+5, "\"\'"))) + return NULL; + + t = xescape(u, "/ "); + free(u); + + if (!t) + return NULL; + + r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t)); + free(t); + + if (r < 0) + return NULL; + + return dn; + } + + return strdup(p); +} + +void filter_environ(const char *prefix) { + int i, j; + assert(prefix); + + if (!environ) + return; + + for (i = 0, j = 0; environ[i]; i++) { + + if (startswith(environ[i], prefix)) + continue; + + environ[j++] = environ[i]; + } + + environ[j] = NULL; +} + +const char *default_term_for_tty(const char *tty) { + assert(tty); + + if (startswith(tty, "/dev/")) + tty += 5; + + if (startswith(tty, "tty") && + tty[3] >= '0' && tty[3] <= '9') + return "TERM=linux"; + + /* FIXME: Proper handling of /dev/console would be cool */ + + return "TERM=vt100-nav"; +} + static const char *const ioprio_class_table[] = { [IOPRIO_CLASS_NONE] = "none", [IOPRIO_CLASS_RT] = "realtime", @@ -3350,7 +3639,9 @@ static const char *const signal_table[] = { [SIGPIPE] = "PIPE", [SIGALRM] = "ALRM", [SIGTERM] = "TERM", - [SIGSTKFLT] = "STKFLT", +#ifdef SIGSTKFLT + [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ +#endif [SIGCHLD] = "CHLD", [SIGCONT] = "CONT", [SIGSTOP] = "STOP",