X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Futil.c;h=434f311e71f9cdbbdafe85229fdeb653f0b22965;hp=c0b63dd574ba911a4d9f282d5184a21785a8fbb6;hb=f601daa70143745915a8d38603969f228414af19;hpb=d6c9574fb558d9e304699b1cc7522c3b133adfc9 diff --git a/src/util.c b/src/util.c index c0b63dd57..434f311e7 100644 --- a/src/util.c +++ b/src/util.c @@ -49,6 +49,7 @@ #include #include #include +#include #include "macro.h" #include "util.h" @@ -57,6 +58,7 @@ #include "log.h" #include "strv.h" #include "label.h" +#include "exit-status.h" bool streq_ptr(const char *a, const char *b) { @@ -502,7 +504,7 @@ 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); @@ -528,6 +530,155 @@ 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); @@ -1658,6 +1809,63 @@ 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; @@ -1807,23 +2015,29 @@ 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); @@ -1859,9 +2073,9 @@ 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); @@ -2033,26 +2247,34 @@ 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; + + while (l > 0) { + size_t step; - r = -errno; - } else + 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; @@ -2398,6 +2620,16 @@ 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 @@ -2531,11 +2763,12 @@ 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); @@ -2766,6 +2999,32 @@ void status_welcome(void) { status_printf("Welcome to \x1B[0;32m%s\x1B[0m!\n", r); /* Green for SUSE */ free(r); + +#elif defined(TARGET_GENTOO) + char *r; + + if (read_one_line_file("/etc/gentoo-release", &r) < 0) + return; + + truncate_nl(r); + + status_printf("Welcome to \x1B[1;34m%s\x1B[0m!\n", r); /* Light Blue for Gentoo */ + + free(r); + +#elif defined(TARGET_DEBIAN) + char *r; + + if (read_one_line_file("/etc/debian_version", &r) < 0) + return; + + truncate_nl(r); + + status_printf("Welcome to Debian \x1B[1;31m%s\x1B[0m!\n", r); /* Light Red for Debian */ + + free(r); +#elif defined(TARGET_ARCH) + status_printf("Welcome to \x1B[1;36mArch Linux\x1B[0m!\n"); /* Cyan for Arch */ #else #warning "You probably should add a welcome text logic here." #endif @@ -2919,7 +3178,7 @@ 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; } @@ -2980,23 +3239,99 @@ char *ellipsize(const char *s, unsigned length, unsigned percent) { return r; } -void nss_disable_nscd(void) { +int touch(const char *path) { + int fd; - void (*func)(void); + assert(path); - /* This is an internal glibc function call. We are not - * supposed to call this, because we are not nscd. However - * sometimes we feel really dangerous and do it - * nonetheless. Muahahah! But at least we protect this with a - * dlsym() just in case glibc takes this away from us. */ + if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0666)) < 0) + return -errno; - if ((func = dlsym(RTLD_DEFAULT, "__nss_disable_nscd"))) { - log_debug("Disabling nscd."); - func(); - } else - log_debug("Cannot disable nscd."); + 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; +} static const char *const ioprio_class_table[] = { [IOPRIO_CLASS_NONE] = "none", @@ -3112,7 +3447,9 @@ 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",