diff options
Diffstat (limited to 'util.c')
| -rw-r--r-- | util.c | 619 |
1 files changed, 619 insertions, 0 deletions
@@ -0,0 +1,619 @@ +/* $NetBSD: util.c,v 1.53 2012/06/04 22:45:05 sjg Exp $ */ + +/* + * Missing stuff from OS's + * + * $Id: util.c,v 1.32 2012/06/06 20:08:44 sjg Exp $ + */ + +#include "make.h" + +#ifndef MAKE_NATIVE +static char rcsid[] = "$NetBSD: util.c,v 1.53 2012/06/04 22:45:05 sjg Exp $"; +#else +#ifndef lint +__RCSID("$NetBSD: util.c,v 1.53 2012/06/04 22:45:05 sjg Exp $"); +#endif +#endif + +#include <errno.h> +#include <time.h> +#include <signal.h> + +#if !defined(HAVE_STRERROR) +extern int errno, sys_nerr; +extern char *sys_errlist[]; + +char * +strerror(int e) +{ + static char buf[100]; + if (e < 0 || e >= sys_nerr) { + snprintf(buf, sizeof(buf), "Unknown error %d", e); + return buf; + } + else + return sys_errlist[e]; +} +#endif + +#if !defined(HAVE_GETENV) || !defined(HAVE_SETENV) || !defined(HAVE_UNSETENV) +extern char **environ; + +static char * +findenv(const char *name, int *offset) +{ + size_t i, len; + char *p, *q; + + len = strlen(name); + for (i = 0; (q = environ[i]); i++) { + p = strchr(q, '='); + if (p == NULL || p - q != len) + continue; + if (strncmp(name, q, len) == 0) { + *offset = i; + return q + len + 1; + } + } + *offset = i; + return NULL; +} + +char * +getenv(const char *name) +{ + int offset; + + return(findenv(name, &offset)); +} + +int +unsetenv(const char *name) +{ + char **p; + int offset; + + if (name == NULL || *name == '\0' || strchr(name, '=') != NULL) { + errno = EINVAL; + return -1; + } + + while (findenv(name, &offset)) { /* if set multiple times */ + for (p = &environ[offset];; ++p) + if (!(*p = *(p + 1))) + break; + } + return 0; +} + +int +setenv(const char *name, const char *value, int rewrite) +{ + char *c, **newenv; + const char *cc; + size_t l_value, size; + int offset; + + if (name == NULL || value == NULL) { + errno = EINVAL; + return -1; + } + + if (*value == '=') /* no `=' in value */ + ++value; + l_value = strlen(value); + + /* find if already exists */ + if ((c = findenv(name, &offset))) { + if (!rewrite) + return 0; + if (strlen(c) >= l_value) /* old larger; copy over */ + goto copy; + } else { /* create new slot */ + size = sizeof(char *) * (offset + 2); + if (savedEnv == environ) { /* just increase size */ + if ((newenv = realloc(savedEnv, size)) == NULL) + return -1; + savedEnv = newenv; + } else { /* get new space */ + /* + * We don't free here because we don't know if + * the first allocation is valid on all OS's + */ + if ((savedEnv = malloc(size)) == NULL) + return -1; + (void)memcpy(savedEnv, environ, size - sizeof(char *)); + } + environ = savedEnv; + environ[offset + 1] = NULL; + } + for (cc = name; *cc && *cc != '='; ++cc) /* no `=' in name */ + continue; + size = cc - name; + /* name + `=' + value */ + if ((environ[offset] = malloc(size + l_value + 2)) == NULL) + return -1; + c = environ[offset]; + (void)memcpy(c, name, size); + c += size; + *c++ = '='; +copy: + (void)memcpy(c, value, l_value + 1); + return 0; +} + +#ifdef TEST +int +main(int argc, char *argv[]) +{ + setenv(argv[1], argv[2], 0); + printf("%s\n", getenv(argv[1])); + unsetenv(argv[1]); + printf("%s\n", getenv(argv[1])); + return 0; +} +#endif + +#endif + + +#if defined(__hpux__) || defined(__hpux) +/* strrcpy(): + * Like strcpy, going backwards and returning the new pointer + */ +static char * +strrcpy(char *ptr, char *str) +{ + int len = strlen(str); + + while (len) + *--ptr = str[--len]; + + return (ptr); +} /* end strrcpy */ + + +char *sys_siglist[] = { + "Signal 0", + "Hangup", /* SIGHUP */ + "Interrupt", /* SIGINT */ + "Quit", /* SIGQUIT */ + "Illegal instruction", /* SIGILL */ + "Trace/BPT trap", /* SIGTRAP */ + "IOT trap", /* SIGIOT */ + "EMT trap", /* SIGEMT */ + "Floating point exception", /* SIGFPE */ + "Killed", /* SIGKILL */ + "Bus error", /* SIGBUS */ + "Segmentation fault", /* SIGSEGV */ + "Bad system call", /* SIGSYS */ + "Broken pipe", /* SIGPIPE */ + "Alarm clock", /* SIGALRM */ + "Terminated", /* SIGTERM */ + "User defined signal 1", /* SIGUSR1 */ + "User defined signal 2", /* SIGUSR2 */ + "Child exited", /* SIGCLD */ + "Power-fail restart", /* SIGPWR */ + "Virtual timer expired", /* SIGVTALRM */ + "Profiling timer expired", /* SIGPROF */ + "I/O possible", /* SIGIO */ + "Window size changes", /* SIGWINDOW */ + "Stopped (signal)", /* SIGSTOP */ + "Stopped", /* SIGTSTP */ + "Continued", /* SIGCONT */ + "Stopped (tty input)", /* SIGTTIN */ + "Stopped (tty output)", /* SIGTTOU */ + "Urgent I/O condition", /* SIGURG */ + "Remote lock lost (NFS)", /* SIGLOST */ + "Signal 31", /* reserved */ + "DIL signal" /* SIGDIL */ +}; +#endif /* __hpux__ || __hpux */ + +#if defined(__hpux__) || defined(__hpux) +#include <sys/types.h> +#include <sys/syscall.h> +#include <sys/signal.h> +#include <sys/stat.h> +#include <dirent.h> +#include <sys/time.h> +#include <unistd.h> + +int +killpg(int pid, int sig) +{ + return kill(-pid, sig); +} + +#if !defined(__hpux__) && !defined(__hpux) +void +srandom(long seed) +{ + srand48(seed); +} + +long +random(void) +{ + return lrand48(); +} +#endif + +#if !defined(__hpux__) && !defined(__hpux) +int +utimes(char *file, struct timeval tvp[2]) +{ + struct utimbuf t; + + t.actime = tvp[0].tv_sec; + t.modtime = tvp[1].tv_sec; + return(utime(file, &t)); +} +#endif + +#if !defined(BSD) && !defined(d_fileno) +# define d_fileno d_ino +#endif + +#ifndef DEV_DEV_COMPARE +# define DEV_DEV_COMPARE(a, b) ((a) == (b)) +#endif +#define ISDOT(c) ((c)[0] == '.' && (((c)[1] == '\0') || ((c)[1] == '/'))) +#define ISDOTDOT(c) ((c)[0] == '.' && ISDOT(&((c)[1]))) + +char * +getwd(char *pathname) +{ + DIR *dp; + struct dirent *d; + extern int errno; + + struct stat st_root, st_cur, st_next, st_dotdot; + char pathbuf[MAXPATHLEN], nextpathbuf[MAXPATHLEN * 2]; + char *pathptr, *nextpathptr, *cur_name_add; + + /* find the inode of root */ + if (stat("/", &st_root) == -1) { + (void)sprintf(pathname, + "getwd: Cannot stat \"/\" (%s)", strerror(errno)); + return NULL; + } + pathbuf[MAXPATHLEN - 1] = '\0'; + pathptr = &pathbuf[MAXPATHLEN - 1]; + nextpathbuf[MAXPATHLEN - 1] = '\0'; + cur_name_add = nextpathptr = &nextpathbuf[MAXPATHLEN - 1]; + + /* find the inode of the current directory */ + if (lstat(".", &st_cur) == -1) { + (void)sprintf(pathname, + "getwd: Cannot stat \".\" (%s)", strerror(errno)); + return NULL; + } + nextpathptr = strrcpy(nextpathptr, "../"); + + /* Descend to root */ + for (;;) { + + /* look if we found root yet */ + if (st_cur.st_ino == st_root.st_ino && + DEV_DEV_COMPARE(st_cur.st_dev, st_root.st_dev)) { + (void)strcpy(pathname, *pathptr != '/' ? "/" : pathptr); + return (pathname); + } + + /* open the parent directory */ + if (stat(nextpathptr, &st_dotdot) == -1) { + (void)sprintf(pathname, + "getwd: Cannot stat directory \"%s\" (%s)", + nextpathptr, strerror(errno)); + return NULL; + } + if ((dp = opendir(nextpathptr)) == NULL) { + (void)sprintf(pathname, + "getwd: Cannot open directory \"%s\" (%s)", + nextpathptr, strerror(errno)); + return NULL; + } + + /* look in the parent for the entry with the same inode */ + if (DEV_DEV_COMPARE(st_dotdot.st_dev, st_cur.st_dev)) { + /* Parent has same device. No need to stat every member */ + for (d = readdir(dp); d != NULL; d = readdir(dp)) + if (d->d_fileno == st_cur.st_ino) + break; + } + else { + /* + * Parent has a different device. This is a mount point so we + * need to stat every member + */ + for (d = readdir(dp); d != NULL; d = readdir(dp)) { + if (ISDOT(d->d_name) || ISDOTDOT(d->d_name)) + continue; + (void)strcpy(cur_name_add, d->d_name); + if (lstat(nextpathptr, &st_next) == -1) { + (void)sprintf(pathname, + "getwd: Cannot stat \"%s\" (%s)", + d->d_name, strerror(errno)); + (void)closedir(dp); + return NULL; + } + /* check if we found it yet */ + if (st_next.st_ino == st_cur.st_ino && + DEV_DEV_COMPARE(st_next.st_dev, st_cur.st_dev)) + break; + } + } + if (d == NULL) { + (void)sprintf(pathname, + "getwd: Cannot find \".\" in \"..\""); + (void)closedir(dp); + return NULL; + } + st_cur = st_dotdot; + pathptr = strrcpy(pathptr, d->d_name); + pathptr = strrcpy(pathptr, "/"); + nextpathptr = strrcpy(nextpathptr, "../"); + (void)closedir(dp); + *cur_name_add = '\0'; + } +} /* end getwd */ + +#endif /* __hpux */ + +#if !defined(HAVE_GETCWD) +char * +getcwd(path, sz) + char *path; + int sz; +{ + return getwd(path); +} +#endif + +/* force posix signals */ +void (* +bmake_signal(int s, void (*a)(int)))(int) +{ + struct sigaction sa, osa; + + sa.sa_handler = a; + sigemptyset(&sa.sa_mask); + sa.sa_flags = SA_RESTART; + + if (sigaction(s, &sa, &osa) == -1) + return SIG_ERR; + else + return osa.sa_handler; +} + +#if !defined(HAVE_VSNPRINTF) || !defined(HAVE_VASPRINTF) +#include <stdarg.h> +#endif + +#if !defined(HAVE_VSNPRINTF) +#if !defined(__osf__) +#ifdef _IOSTRG +#define STRFLAG (_IOSTRG|_IOWRT) /* no _IOWRT: avoid stdio bug */ +#else +#if 0 +#define STRFLAG (_IOREAD) /* XXX: Assume svr4 stdio */ +#endif +#endif /* _IOSTRG */ +#endif /* __osf__ */ + +int +vsnprintf(char *s, size_t n, const char *fmt, va_list args) +{ +#ifdef STRFLAG + FILE fakebuf; + + fakebuf._flag = STRFLAG; + /* + * Some os's are char * _ptr, others are unsigned char *_ptr... + * We cast to void * to make everyone happy. + */ + fakebuf._ptr = (void *)s; + fakebuf._cnt = n-1; + fakebuf._file = -1; + _doprnt(fmt, args, &fakebuf); + fakebuf._cnt++; + putc('\0', &fakebuf); + if (fakebuf._cnt<0) + fakebuf._cnt = 0; + return (n-fakebuf._cnt-1); +#else +#ifndef _PATH_DEVNULL +# define _PATH_DEVNULL "/dev/null" +#endif + /* + * Rats... we don't want to clobber anything... + * do a printf to /dev/null to see how much space we need. + */ + static FILE *nullfp; + int need = 0; /* XXX what's a useful error return? */ + + if (!nullfp) + nullfp = fopen(_PATH_DEVNULL, "w"); + if (nullfp) { + need = vfprintf(nullfp, fmt, args); + if (need < n) + (void)vsprintf(s, fmt, args); + } + return need; +#endif +} +#endif + +#if !defined(HAVE_SNPRINTF) +int +snprintf(char *s, size_t n, const char *fmt, ...) +{ + va_list ap; + int rv; + + va_start(ap, fmt); + rv = vsnprintf(s, n, fmt, ap); + va_end(ap); + return rv; +} +#endif + +#if !defined(HAVE_STRFTIME) +size_t +strftime(char *buf, size_t len, const char *fmt, const struct tm *tm) +{ + static char months[][4] = { + "Jan", "Feb", "Mar", "Apr", "May", "Jun", + "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" + }; + + size_t s; + char *b = buf; + + while (*fmt) { + if (len == 0) + return buf - b; + if (*fmt != '%') { + *buf++ = *fmt++; + len--; + continue; + } + switch (*fmt++) { + case '%': + *buf++ = '%'; + len--; + if (len == 0) return buf - b; + /*FALLTHROUGH*/ + case '\0': + *buf = '%'; + s = 1; + break; + case 'k': + s = snprintf(buf, len, "%d", tm->tm_hour); + break; + case 'M': + s = snprintf(buf, len, "%02d", tm->tm_min); + break; + case 'S': + s = snprintf(buf, len, "%02d", tm->tm_sec); + break; + case 'b': + if (tm->tm_mon >= 12) + return buf - b; + s = snprintf(buf, len, "%s", months[tm->tm_mon]); + break; + case 'd': + s = snprintf(buf, len, "%02d", tm->tm_mday); + break; + case 'Y': + s = snprintf(buf, len, "%d", 1900 + tm->tm_year); + break; + default: + s = snprintf(buf, len, "Unsupported format %c", + fmt[-1]); + break; + } + buf += s; + len -= s; + } +} +#endif + +#if !defined(HAVE_KILLPG) +#if !defined(__hpux__) && !defined(__hpux) +int +killpg(int pid, int sig) +{ + return kill(-pid, sig); +} +#endif +#endif + +#if !defined(HAVE_WARNX) +static void +vwarnx(const char *fmt, va_list args) +{ + fprintf(stderr, "%s: ", progname); + if ((fmt)) { + vfprintf(stderr, fmt, args); + fprintf(stderr, ": "); + } +} +#endif + +#if !defined(HAVE_WARN) +static void +vwarn(const char *fmt, va_list args) +{ + vwarnx(fmt, args); + fprintf(stderr, "%s\n", strerror(errno)); +} +#endif + +#if !defined(HAVE_ERR) +static void +verr(int eval, const char *fmt, va_list args) +{ + vwarn(fmt, args); + exit(eval); +} +#endif + +#if !defined(HAVE_ERRX) +static void +verrx(int eval, const char *fmt, va_list args) +{ + vwarnx(fmt, args); + exit(eval); +} +#endif + +#if !defined(HAVE_ERR) +void +err(int eval, const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + verr(eval, fmt, ap); + va_end(ap); +} +#endif + +#if !defined(HAVE_ERRX) +void +errx(int eval, const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + verrx(eval, fmt, ap); + va_end(ap); +} +#endif + +#if !defined(HAVE_WARN) +void +warn(const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + vwarn(fmt, ap); + va_end(ap); +} +#endif + +#if !defined(HAVE_WARNX) +void +warnx(const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + vwarnx(fmt, ap); + va_end(ap); +} +#endif |