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