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minix/commands/make/make.c
Philip Homburg d45066257c More stack for make. Fixed buffer overrun in make.
2005-08-18 11:36:36 +00:00

783 lines
18 KiB
C
Executable file
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/*************************************************************************
*
* m a k e : m a k e . c
*
* Do the actual making for make plus system dependent stuff
*========================================================================
* Edition history
*
* # Date Comments By
* --- -------- ---------------------------------------------------- ---
* 1 ?? ??
* 2 01.07.89 $<,$* bugs fixed RAL
* 3 23.08.89 (time_t)time((time_t*)0) bug fixed, N_EXISTS added RAL
* 4 30.08.89 leading sp. in cmd. output eliminated, indention ch. PSH,RAL
* 5 03.09.89 :: time fixed, error output -> stderr, N_ERROR intr.
* fixed LZ elimintaed RAL
* 6 07.09.89 implmacro, DF macros,debug stuff added RAL
* 7 09.09.89 tos support added PHH,RAL
* 8 17.09.89 make1 arg. fixed, N_EXEC introduced RAL
* ------------ Version 2.0 released ------------------------------- RAL
* 18.05.90 fixed -n bug with silent rules. (Now echos them.) PAN
*
*************************************************************************/
#include "h.h"
#include <sys/wait.h>
#include <unistd.h>
_PROTOTYPE(static void tellstatus, (FILE *out, char *name, int status));
static bool execflag;
/*
* Exec a shell that returns exit status correctly (/bin/esh).
* The standard EON shell returns the process number of the last
* async command, used by the debugger (ugg).
* [exec on eon is like a fork+exec on unix]
*/
int dosh(string, shell)
char *string;
char *shell;
{
int number;
#ifdef unix
return system(string);
#endif
#ifdef tos
return Tosexec(string);
#endif
#ifdef eon
return ((number = execl(shell, shell,"-c", string, 0)) == -1) ?
-1: /* couldn't start the shell */
wait(number); /* return its exit status */
#endif
#ifdef os9
int status, pid;
strcat(string, "\n");
if ((number = os9fork(shell, strlen(string), string, 0, 0, 0)) == -1)
return -1; /* Couldn't start a shell */
do {
if ((pid = wait(&status)) == -1)
return -1; /* child already died!?!? */
} while (pid != number);
return status;
#endif
}
#ifdef unix
/*
* Make a file look very outdated after an error trying to make it.
* Don't remove, this keeps hard links intact. (kjb)
*/
int makeold(name) char *name;
{
struct utimbuf a;
a.actime = a.modtime = 0; /* The epoch */
return utime(name, &a);
}
#endif
static void tellstatus(out, name, status)
FILE *out;
char *name;
int status;
{
char cwd[PATH_MAX];
fprintf(out, "%s in %s: ",
name, getcwd(cwd, sizeof(cwd)) == NULL ? "?" : cwd);
if (WIFEXITED(status)) {
fprintf(out, "Exit code %d", WEXITSTATUS(status));
} else {
fprintf(out, "Signal %d%s",
WTERMSIG(status), status & 0x80 ? " - core dumped" : "");
}
}
/*
* Do commands to make a target
*/
void docmds1(np, lp)
struct name *np;
struct line *lp;
{
register char *q;
register char *p;
register struct cmd *cp;
bool ssilent;
bool signore;
int estat;
char *shell;
if (*(shell = getmacro("SHELL")) == '\0')
#ifdef eon
shell = ":bin/esh";
#endif
#ifdef unix
shell = "/bin/sh";
#endif
#ifdef os9
shell = "shell";
#endif
#ifdef tos
shell = "DESKTOP"; /* TOS has no shell */
#endif
for (cp = lp->l_cmd; cp; cp = cp->c_next) {
execflag = TRUE;
strcpy(str1, cp->c_cmd);
expmake = FALSE;
expand(&str1s);
q = str1;
ssilent = silent;
signore = ignore;
while ((*q == '@') || (*q == '-')) {
if (*q == '@') /* Specific silent */
ssilent = TRUE;
else /* Specific ignore */
signore = TRUE;
if (!domake) putchar(*q); /* Show all characters. */
q++; /* Not part of the command */
}
for (p=q; *p; p++) {
if (*p == '\n' && p[1] != '\0') {
*p = ' ';
if (!ssilent || !domake)
fputs("\\\n", stdout);
}
else if (!ssilent || !domake)
putchar(*p);
}
if (!ssilent || !domake)
putchar('\n');
if (domake || expmake) { /* Get the shell to execute it */
fflush(stdout);
if ((estat = dosh(q, shell)) != 0) {
if (estat == -1)
fatal("Couldn't execute %s", shell,0);
else if (signore) {
tellstatus(stdout, myname, estat);
printf(" (Ignored)\n");
} else {
tellstatus(stderr, myname, estat);
fprintf(stderr, "\n");
if (!(np->n_flag & N_PREC))
#ifdef unix
if (makeold(np->n_name) == 0)
fprintf(stderr,"%s: made '%s' look old.\n", myname, np->n_name);
#else
if (unlink(np->n_name) == 0)
fprintf(stderr,"%s: '%s' removed.\n", myname, np->n_name);
#endif
if (!conterr) exit(estat != 0);
np->n_flag |= N_ERROR;
return;
}
}
}
}
}
void docmds(np)
struct name *np;
{
register struct line *lp;
for (lp = np->n_line; lp; lp = lp->l_next)
docmds1(np, lp);
}
#ifdef tos
/*
* execute the command submitted by make,
* needed because TOS has no internal shell,
* so we use Pexec to do the job
* v 1.1 of 10/sep/89 by yeti
*/
#define DELM1 ';'
#define DELM2 ' '
#define DELM3 ','
int Tosexec(string)
char *string;
{
register char *help, *help2, c;
register unsigned char l=1;
char progname[80], command[255], plain[15];
static char **envp,*env;
register int error,i;
/* generate strange TOS environment (RAL) */
for ( i = 0, envp = environ; *envp; envp++) i += strlen(*envp) +1;
if ((env = malloc(i+1)) == (char *)0)
fatal("No memory for TOS environment",(char *)0,0);
for ( envp = environ, help = env; *envp; envp++) {
strcpy ( help, *envp);
while ( *(help++)) ;
}
*help = '\0';
help = progname;
while((*help++=*string++) != ' '); /* progname is command name */
*--help = '\0';
l = strlen(string); /* build option list */
command[0] = l; /* TOS likes it complicated */
strcpy(&command[1],string);
if ((error = (int) Pexec(0,progname,command,env)) != -33) {
free(env);
return(error);
}
/* could'nt find program, try to search the PATH */
if((help=strrchr(progname,'\\')) != (char *) 0) /* just the */
strcpy(plain,++help); /* name */
else if((help=strrchr(progname,'/')) != (char *) 0)
strcpy(plain,++help);
else if((help=strrchr(progname,':')) != (char *) 0)
strcpy(plain,++help);
else
strcpy(plain,progname);
if(*(help=getmacro("PATH")) == '\0') {
free(env);
return(-33);
}
c = 1;
while(c)
{ help2 = &progname[-1];
i = 0;
while((c=*help++) != '\0' && i<80 && c != DELM1
&& c != DELM2 && c != DELM3)
*++help2 = c, i++;
*++help2 = '\\';
strcpy(++help2,plain);
if((error=(int) Pexec(0,progname,command,env))!=-33) {
free(env);
return(error);
}
}
free(env);
return(-33);
}
/* (stolen from ZOO -- thanks to Rahul Dehsi)
Function mstonix() accepts an MSDOS format date and time and returns
a **IX format time. No adjustment is done for timezone.
*/
time_t mstonix (date, time)
unsigned int date, time;
{
int year, month, day, hour, min, sec, daycount;
time_t longtime;
/* no. of days to beginning of month for each month */
static int dsboy[12] = { 0, 31, 59, 90, 120, 151, 181, 212,
243, 273, 304, 334};
if (date == 0 && time == 0) /* special case! */
return (0L);
/* part of following code is common to zoolist.c */
year = (((unsigned int) date >> 9) & 0x7f) + 1980;
month = ((unsigned int) date >> 5) & 0x0f;
day = date & 0x1f;
hour = ((unsigned int) time >> 11)& 0x1f;
min = ((unsigned int) time >> 5) & 0x3f;
sec = ((unsigned int) time & 0x1f) * 2;
/* DEBUG and leap year fixes thanks to Mark Alexander <uunet!amdahl!drivax!alexande>*/
#ifdef DEBUG
printf ("mstonix: year=%d month=%d day=%d hour=%d min=%d sec=%d\n",
year, month, day, hour, min, sec);
#endif
/* Calculate days since 1970/01/01 */
daycount = 365 * (year - 1970) + /* days due to whole years */
(year - 1969) / 4 + /* days due to leap years */
dsboy[month-1] + /* days since beginning of this year */
day-1; /* days since beginning of month */
if (year % 4 == 0 &&
year % 400 != 0 && month >= 3) /* if this is a leap year and month */
daycount++; /* is March or later, add a day */
/* Knowing the days, we can find seconds */
longtime = daycount * 24L * 60L * 60L +
hour * 60L * 60L + min * 60 + sec;
return (longtime);
}
#endif /* tos */
#ifdef os9
/*
* Some stuffing around to get the modified time of a file
* in an os9 file system
*/
void getmdate(fd, tbp)
int fd;
struct sgtbuf *tbp;
{
struct registers regs;
static struct fildes fdbuf;
regs.rg_a = fd;
regs.rg_b = SS_FD;
regs.rg_x = &fdbuf;
regs.rg_y = sizeof (fdbuf);
if (_os9(I_GETSTT, &regs) == -1) {
errno = regs.rg_b & 0xff;
return -1;
}
if (tbp)
{
_strass(tbp, fdbuf.fd_date, sizeof (fdbuf.fd_date));
tbp->t_second = 0; /* Files are only acurate to mins */
}
return 0;
}
/*
* Kludge routine to return an aproximation of how many
* seconds since 1980. Dates will be in order, but will not
* be lineer
*/
time_t cnvtime(tbp)
struct sgtbuf *tbp;
{
long acc;
acc = tbp->t_year - 80; /* Baseyear is 1980 */
acc = acc * 12 + tbp->t_month;
acc = acc * 31 + tbp->t_day;
acc = acc * 24 + tbp->t_hour;
acc = acc * 60 + tbp->t_minute;
acc = acc * 60 + tbp->t_second;
return acc;
}
/*
* Get the current time in the internal format
*/
void time(tp)
time_t *tp;
{
struct sgtbuf tbuf;
if (getime(&tbuf) < 0)
return -1;
if (tp)
*tp = cnvtime(&tbuf);
return 0;
}
#endif
/*
* Get the modification time of a file. If the first
* doesn't exist, it's modtime is set to 0.
*/
void modtime(np)
struct name *np;
{
#ifdef unix
struct stat info;
int r;
if (is_archive_ref(np->n_name)) {
r = archive_stat(np->n_name, &info);
} else {
r = stat(np->n_name, &info);
}
if (r < 0) {
if (errno != ENOENT)
fatal("Can't open %s: %s", np->n_name, errno);
np->n_time = 0L;
np->n_flag &= ~N_EXISTS;
} else {
np->n_time = info.st_mtime;
np->n_flag |= N_EXISTS;
}
#endif
#ifdef tos
struct DOSTIME fm;
int fd;
if((fd=Fopen(np->n_name,0)) < 0) {
np->n_time = 0L;
np->n_flag &= ~N_EXISTS;
}
else {
Fdatime(&fm,fd,0);
Fclose(fd);
np->n_time = mstonix((unsigned int)fm.date,(unsigned int)fm.time);
np->n_flag |= N_EXISTS;
}
#endif
#ifdef eon
struct stat info;
int fd;
if ((fd = open(np->n_name, 0)) < 0) {
if (errno != ER_NOTF)
fatal("Can't open %s: %s", np->n_name, errno);
np->n_time = 0L;
np->n_flag &= ~N_EXISTS;
}
else if (getstat(fd, &info) < 0)
fatal("Can't getstat %s: %s", np->n_name, errno);
else {
np->n_time = info.st_mod;
np->n_flag |= N_EXISTS;
}
close(fd);
#endif
#ifdef os9
struct sgtbuf info;
int fd;
if ((fd = open(np->n_name, 0)) < 0) {
if (errno != E_PNNF)
fatal("Can't open %s: %s", np->n_name, errno);
np->n_time = 0L;
np->n_flag &= ~N_EXISTS;
}
else if (getmdate(fd, &info) < 0)
fatal("Can't getstat %s: %s", np->n_name, errno);
else {
np->n_time = cnvtime(&info);
np->n_flag |= N_EXISTS;
}
close(fd);
#endif
}
/*
* Update the mod time of a file to now.
*/
void touch(np)
struct name *np;
{
char c;
int fd;
if (!domake || !silent) printf("touch(%s)\n", np->n_name);
if (domake) {
#ifdef unix
struct utimbuf a;
a.actime = a.modtime = time((time_t *)NULL);
if (utime(np->n_name, &a) < 0)
printf("%s: '%s' not touched - non-existant\n",
myname, np->n_name);
#endif
#ifdef tos
struct DOSTIME fm;
int fd;
if((fd=Fopen(np->n_name,0)) < 0) {
printf("%s: '%s' not touched - non-existant\n",
myname, np->n_name);
}
else {
fm.date = Tgetdate();
fm.time = Tgettime();
Fdatime(&fm,fd,1);
Fclose(fd);
}
#endif
#ifdef eon
if ((fd = open(np->n_name, 0)) < 0)
printf("%s: '%s' not touched - non-existant\n",
myname, np->n_name);
else
{
uread(fd, &c, 1, 0);
uwrite(fd, &c, 1);
}
close(fd);
#endif
#ifdef os9
/*
* Strange that something almost as totally useless
* as this is easy to do in os9!
*/
if ((fd = open(np->n_name, S_IWRITE)) < 0)
printf("%s: '%s' not touched - non-existant\n",
myname, np->n_name);
close(fd);
#endif
}
}
/*
* Recursive routine to make a target.
*/
int make(np, level)
struct name *np;
int level;
{
register struct depend *dp;
register struct line *lp;
register struct depend *qdp;
time_t now, t, dtime = 0;
bool dbgfirst = TRUE;
char *basename = (char *) 0;
char *inputname = (char *) 0;
if (np->n_flag & N_DONE) {
if(dbginfo) dbgprint(level,np,"already done");
return 0;
}
modtime(np); /* Gets modtime of this file */
while (time(&now) == np->n_time) {
/* Time of target is equal to the current time. This bothers us, because
* we can't tell if it needs to be updated if we update a file it depends
* on within a second. So wait a second. (A per-second timer is too
* coarse for today's fast machines.)
*/
sleep(1);
}
if (rules) {
for (lp = np->n_line; lp; lp = lp->l_next)
if (lp->l_cmd)
break;
if (!lp)
dyndep(np,&basename,&inputname);
}
if (!(np->n_flag & (N_TARG | N_EXISTS))) {
fprintf(stderr,"%s: Don't know how to make %s\n", myname, np->n_name);
if (conterr) {
np->n_flag |= N_ERROR;
if (dbginfo) dbgprint(level,np,"don't know how to make");
return 0;
}
else exit(1);
}
for (qdp = (struct depend *)0, lp = np->n_line; lp; lp = lp->l_next) {
for (dp = lp->l_dep; dp; dp = dp->d_next) {
if(dbginfo && dbgfirst) {
dbgprint(level,np," {");
dbgfirst = FALSE;
}
make(dp->d_name, level+1);
if (np->n_time < dp->d_name->n_time)
qdp = newdep(dp->d_name, qdp);
dtime = max(dtime, dp->d_name->n_time);
if (dp->d_name->n_flag & N_ERROR) np->n_flag |= N_ERROR;
if (dp->d_name->n_flag & N_EXEC ) np->n_flag |= N_EXEC;
}
if (!quest && (np->n_flag & N_DOUBLE) &&
(np->n_time < dtime || !( np->n_flag & N_EXISTS))) {
execflag = FALSE;
make1(np, lp, qdp, basename, inputname); /* free()'s qdp */
dtime = 0;
qdp = (struct depend *)0;
if(execflag) np->n_flag |= N_EXEC;
}
}
np->n_flag |= N_DONE;
if (quest) {
t = np->n_time;
np->n_time = now;
return (t < dtime);
}
else if ((np->n_time < dtime || !( np->n_flag & N_EXISTS))
&& !(np->n_flag & N_DOUBLE)) {
execflag = FALSE;
make1(np, (struct line *)0, qdp, basename, inputname); /* free()'s qdp */
np->n_time = now;
if ( execflag) np->n_flag |= N_EXEC;
}
else if ( np->n_flag & N_EXEC ) {
np->n_time = now;
}
if (dbginfo) {
if(dbgfirst) {
if(np->n_flag & N_ERROR)
dbgprint(level,np,"skipped because of error");
else if(np->n_flag & N_EXEC)
dbgprint(level,np,"successfully made");
else dbgprint(level,np,"is up to date");
}
else {
if(np->n_flag & N_ERROR)
dbgprint(level,(struct name *)0,"} skipped because of error");
else if(np->n_flag & N_EXEC)
dbgprint(level,(struct name *)0,"} successfully made");
else dbgprint(level,(struct name *)0,"} is up to date");
}
}
if (level == 0 && !(np->n_flag & N_EXEC))
printf("%s: '%s' is up to date\n", myname, np->n_name);
if(basename)
free(basename);
return 0;
}
void make1(np, lp, qdp, basename, inputname)
struct name *np;
struct line *lp;
register struct depend *qdp;
char *basename;
char *inputname;
{
register struct depend *dp;
size_t l1, l2;
if (dotouch)
touch(np);
else if (!(np->n_flag & N_ERROR)) {
strcpy(str1, "");
if(!inputname) {
inputname = str1; /* default */
if (ambigmac) implmacros(np,lp,&basename,&inputname);
}
setDFmacro("<",inputname);
if(!basename)
basename = str1;
setDFmacro("*",basename);
for (dp = qdp; dp; dp = qdp) {
l1= strlen(str1);
l2= strlen(dp->d_name->n_name);
while (l1 + 1 + l2 +1 > str1s.len)
strrealloc(&str1s);
if (strlen(str1))
strcat(str1, " ");
strcat(str1, dp->d_name->n_name);
qdp = dp->d_next;
free(dp);
}
setmacro("?", str1);
setDFmacro("@", np->n_name);
if (lp) /* lp set if doing a :: rule */
docmds1(np, lp);
else
docmds(np);
}
}
void implmacros(np,lp, pbasename,pinputname)
struct name *np;
struct line *lp;
char **pbasename; /* Name without suffix */
char **pinputname;
{
struct line *llp;
register char *p;
register char *q;
register char *suff; /* Old suffix */
int baselen;
struct depend *dp;
bool dpflag = FALSE;
/* get basename out of target name */
p = str2;
q = np->n_name;
suff = suffix(q);
while ( *q && (q < suff || !suff)) *p++ = *q++;
*p = '\0';
if ((*pbasename = (char *) malloc(strlen(str2)+1)) == (char *)0 )
fatal("No memory for basename",(char *)0,0);
strcpy(*pbasename,str2);
baselen = strlen(str2);
if ( lp)
llp = lp;
else
llp = np->n_line;
while (llp) {
for (dp = llp->l_dep; dp; dp = dp->d_next) {
if( strncmp(*pbasename,dp->d_name->n_name,baselen) == 0) {
*pinputname = dp->d_name->n_name;
return;
}
if( !dpflag) {
*pinputname = dp->d_name->n_name;
dpflag = TRUE;
}
}
if (lp) break;
llp = llp->l_next;
}
#if NO_WE_DO_WANT_THIS_BASENAME
free(*pbasename); /* basename ambiguous or no dependency file */
*pbasename = (char *)0;
#endif
return;
}
void dbgprint(level,np,comment)
int level;
struct name *np;
char *comment;
{
char *timep;
if(np) {
timep = ctime(&np->n_time);
timep[24] = '\0';
fputs(&timep[4],stdout);
}
else fputs(" ",stdout);
fputs(" ",stdout);
while(level--) fputs(" ",stdout);
if (np) {
fputs(np->n_name,stdout);
if (np->n_flag & N_DOUBLE) fputs(" :: ",stdout);
else fputs(" : ",stdout);
}
fputs(comment,stdout);
putchar((int)'\n');
fflush(stdout);
return;
}
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