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minix/usr.bin/make/util.c
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC) 
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

494 lines
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/* $NetBSD: util.c,v 1.54 2013/11/26 13:44:41 joerg Exp $ */
/*
* Missing stuff from OS's
*/
#if defined(__MINT__) || defined(__linux__)
#include <signal.h>
#endif
#ifndef MAKE_NATIVE
static char rcsid[] = "$NetBSD: util.c,v 1.54 2013/11/26 13:44:41 joerg Exp $";
#else
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: util.c,v 1.54 2013/11/26 13:44:41 joerg Exp $");
#endif
#endif
#include <sys/param.h>
#include <errno.h>
#include <stdio.h>
#include <time.h>
#include <signal.h>
#include "make.h"
#if !defined(MAKE_NATIVE) && !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(MAKE_NATIVE) && !defined(HAVE_SETENV)
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 */
/* 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(MAKE_NATIVE) && !defined(HAVE_VSNPRINTF)
#include <stdarg.h>
#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
(void)vsprintf(s, fmt, args);
return strlen(s);
#endif
}
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;
}
#if !defined(MAKE_NATIVE) && !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
#endif
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