/* Misc. shared utility functions for initctl, reboot and finit * * Copyright (c) 2016-2025 Joachim Wiberg * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #ifndef FINIT_UTIL_H_ #define FINIT_UTIL_H_ #include "config.h" #include #ifdef HAVE_TERMIOS_H #include #include #include #include #include #include #endif #ifndef RB_SW_SUSPEND /* Since Linux 2.5.18, but not in GLIBC until 2.19 */ #define RB_SW_SUSPEND 0xd000fce2 #endif extern int debug; /* defined in finit or initctl */ extern int ttrows; extern int ttcols; extern char *prognm; /* Define for printheader() from conio.h, used in initctl */ #ifndef SCREEN_WIDTH #define SCREEN_WIDTH ttcols #endif #ifdef _LIBITE_LITE # include # include #else # include # include #endif #include "log.h" char *progname (char *arg0); const char *basenm (const char *path); char *str (char *fmt, ...) __attribute__ ((format (printf, 1, 2))); int getuser (const char *username, char **home); int getgroup (const char *group); int getcuser (char *buf, size_t len); int getcgroup (char *buf, size_t len); int mksubsys (const char *dir, mode_t mode, char *user, char *group); int mksubsysd (const char *dir, mode_t mode, uid_t uid, gid_t gid); int chownr (const char *path, uid_t uid, gid_t gid); int rmcontents (const char *path); int rmrf (const char *path); char *fslurp (size_t *lenp, const char *fmt, ...) __attribute__ ((format (printf, 2, 3))); char *vfslurp (size_t *lenp, const char *fmt, va_list ap); int fnread (char *buf, size_t len, char *fmt, ...) __attribute__ ((format (printf, 3, 4))); int fnwrite (char *value, char *fmt, ...) __attribute__ ((format (printf, 2, 3))); int fngetint (char *path, int *val); int suspend (void); int strtobytes (char *arg); char *sig2str (int sig); int str2sig (char *sig); char *code2str (int code); int str2rlim (char *str); char *rlim2str (int rlim); char *lim2str (struct rlimit *rlim); void do_sleep (unsigned int sec); void do_usleep (unsigned int usec); long jiffies (void); char *uptime (long secs, char *buf, size_t len); char *memsz (uint64_t sz, char *buf, size_t len); char *sanitize (char *arg, size_t len); void de_dotdot (char *file); int ismnt (char *file, char *dir, char *mode); int fismnt (char *dir); int fistmpfs (char *dir); #ifdef HAVE_TERMIOS_H int ttinit (int probe_size); int ttraw (void); int ttcooked (void); #else #define ttinit(v) ttcols #define ttraw() 0 #define ttcooked() 0 #endif /* * Defaults to user "root" and group "wheel" (root) if: * 1) the user is missing * 2) the group or the file /etc/group is missing */ static inline int create(char *path, mode_t mode, char *user, char *group) { int fd, uid, gid; if (!path) { errno = EINVAL; return -1; } uid = getuser(user, NULL); if (uid < 0) uid = 0; gid = getgroup(group); if (gid < 0) gid = 0; fd = creat(path, mode); if (fd == -1) { warn("Failed creating %s properly", path); return -1; } close(fd); if (chown(path, uid, gid)) { warn("Failed chowning %s properly", path); return -1; } return 0; } static inline int ln(const char *target, const char *linkpath) { if (!target || !linkpath) { errno = EINVAL; return -1; } if (symlink(target, linkpath)) { if (errno != EEXIST) warn("Failed creating %s -> %s symlink", target, linkpath); return -1; } return 0; } static inline char *strterm(char *str, size_t len) { str[len - 1] = 0; return str; } /* paste dir/file into buf */ static inline int paste(char *buf, size_t len, const char *dir, const char *file) { if (!dir) dir = ""; if (!file) file = ""; return snprintf(buf, len, "%s%s%s", dir, fisslashdir(dir) ? "" : file[0] == '/' ? "" : "/", file); } /* ensure path has suffix */ static inline int suffix(char *path, size_t len, const char *sfx) { size_t slen = strlen(sfx); size_t plen = strlen(path); if (plen < slen) slen = strlcat(path, sfx, len); else { plen -= slen; if (strcmp(&path[plen], sfx)) slen = strlcat(path, sfx, len); } if (slen >= len) return -1; return 0; } static inline void hexdump(const char *buf, size_t len) { size_t i, j; for (i = 0; i < len; i += 16) { printf("%08zx ", i); for (j = 0; j < 8 && i + j < len; j++) printf("%02x ", buf[i + j]); if (j == 8) { printf(" "); } else { for (; j < 8; j++) printf(" "); printf(" "); } for (j = 8; j < 16 && i + j < len; j++) printf("%02x ", buf[i + j]); for (; j < 16; j++) printf(" "); printf(" |"); for (j = 0; j < 16 && i + j < len; j++) { char c = buf[i + j]; printf("%c", isprint(c) ? c : '.'); } printf("|\n"); } } /* drop quotes from a string at point, if any */ static inline int unquote(char **str, char *end) { char *ptr = *str; /* unquote value, if quoted */ if (ptr[0] == '"' || ptr[0] == '\'') { char q = ptr[0]; if (!end && !(end = strchr(&ptr[1], q))) return -1; if (*end == q) { *str = &ptr[1]; *end = 0; } } return 0; } #endif /* FINIT_UTIL_H_ */ /** * Local Variables: * indent-tabs-mode: t * c-file-style: "linux" * End: */