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/*
* Copyright (c) 1999-2003 Smithsonian Astrophysical Observatory
*/
/*
*
* GIO -- generalized I/O to disk files, streams, and memory
*
*/
#include <gio.h>
#include <find.h>
#include <word.h>
#include <zlib.h>
/*
*
* Private Routines
*
*/
#define GBUFSZ 32768
static char _gtbuf[GBUFSZ];
static char _gerrors[GBUFSZ];
static int _gerror = -1;
static char _gwarnings[GBUFSZ];
static int _gwarning = -1;
static int _gcrnl = 1;
/*
*
* gext -- return extension from a file (without bracket extension)
*
*/
#ifdef ANSI_FUNC
static char *
gext(char *fname)
#else
static char *gext(fname)
char *fname;
#endif
{
char *s, *t=NULL;
char *file;
if( !fname || !*fname )
return(NULL);
/* make a working copy */
file = xstrdup(fname);
/* remove the bracket extension */
if( (s=strchr(file, '[')) ){
*s = '\0';
}
/* look for a file extension */
if( (s = strrchr(file, '.')) ){
strncpy(_gtbuf, s, GBUFSZ-2);
_gtbuf[GBUFSZ-1] = '\0';
t = _gtbuf;
}
/* free working copy */
if( file ) xfree(file);
/* return extension */
return(t);
}
/*
*
* gnew -- create a new GIO structure
*
*/
#ifdef ANSI_FUNC
static GIO
gnew (void)
#else
static GIO gnew()
#endif
{
GIO gio;
gio = (GIO)xcalloc(1, sizeof(GFile));
gio->ifd = -1;
gio->ofd = -1;
return(gio);
}
/*
*
* gfree -- destroy a GIO structure
*
*/
#ifdef ANSI_FUNC
static void
gfree (GIO gio)
#else
static void gfree(gio)
GIO gio;
#endif
{
if( gio == NULL )
return;
if( gio->name )
xfree(gio->name);
if( gio->mode )
xfree(gio->mode);
if( gio->crbuf )
xfree(gio->crbuf);
xfree((void *)gio);
}
/*
*
* gmemseek -- memory "seek" of data
*
*/
#ifdef ANSI_FUNC
static off_t
gmemseek (GIO gio, off_t offset, int whence)
#else
static off_t gmemseek(gio, offset, whence)
GIO gio;
off_t offset;
int whence;
#endif
{
int offset2;
switch(whence){
case 0:
offset2 = offset;
break;
case 1:
offset2 = gio->cur + offset;
break;
case 2:
offset2 = gio->len + offset;
break;
default:
return(-1);
}
if( offset2 >= gio->len ){
if( gio->extend ){
gio->len = offset2 + 1;
gio->buf = (char *)xrealloc(gio->buf, gio->len);
gio->cur = offset2;
return(0);
}
else{
return(-1);
}
} else {
gio->cur = offset2;
return(0);
}
}
/*
*
* gmemread -- memory "read" of data
*
*/
#ifdef ANSI_FUNC
static void *
gmemread (GIO gio, void *buf, size_t size, size_t n, size_t *got)
#else
static void *gmemread(gio, buf, size, n, got)
GIO gio;
void *buf;
size_t size;
size_t n;
size_t *got;
#endif
{
char *obuf;
/* sanity checks */
if( (gio==NULL) || (gio->buf == NULL) )
return((void *)NULL);
if( !strchr(gio->mode, 'r') && !strstr(gio->mode, "w+") ){
gerror(stderr,
"illegal read operation on write-only data (%s)\n", gio->name);
return((void *)NULL);
}
/* see how much we can grab to "EOF" */
if( size <= 0 ) size = 1;
*got = MIN(size*n, ((gio->len - gio->cur)/size)*size);
/* copy bytes, if a buffer was supplied */
if( buf ){
obuf = buf;
memmove(obuf, &(gio->buf[gio->cur]), *got);
}
else{
obuf = &(gio->buf[gio->cur]);
}
/* bump position pointer */
gio->cur += *got;
/* convert got to elements */
*got /= size;
/* return buffer */
return(obuf);
}
/*
*
* gmemwrite -- memory "write" of data
*
*/
#ifdef ANSI_FUNC
static int
gmemwrite (GIO gio, char *buf, size_t size, size_t n)
#else
static int gmemwrite(gio, buf, size, n)
GIO gio;
char *buf;
size_t size;
size_t n;
#endif
{
size_t n2;
int len;
/* sanity checks */
if( (gio==NULL) || (gio->buf == NULL) )
return(0);
if( !strchr(gio->mode, 'w') && !strstr(gio->mode, "r+") ){
gerror(stderr,
"illegal write operation on read-only data (%s)\n", gio->name);
return(0);
}
len = size*n;
/* make sure we have enough space */
if( gio->cur + len >= gio->len ){
if( gio->extend ){
gio->len += MAX(len, GIO_BUFINC);
if( (gio->buf = (char *)xrealloc(gio->buf, gio->len)) != NULL )
n2 = len;
/* could not grab space -- try just a bit to recover */
else{
gerror(stderr, "could not realloc space for memory write\n");
n2 = 0;
}
}
else{
n2 = gio->len - gio->cur;
}
}
else
n2 = len;
/* copy bytes */
memmove(&(gio->buf[gio->cur]), buf, n2);
/* bump pointer */
gio->cur += n2;
return(n/size);
}
/*
*
* gexec -- open a connected subprocess with bidirectional
* IPC channels, implemented with pipes for this version
*
*/
#ifdef ANSI_FUNC
static int
gexec(GIO gio, char *cmd, char *mode)
#else
static int gexec(gio, cmd, mode)
GIO gio;
char *cmd;
char *mode;
#endif
{
int pin[2], pout[2];
int maxforks = 3;
char *argv[4096];
/* start out pessimisticaly */
gio->ifd = -1;
gio->ofd = -1;
/* open pipes */
pipe(pin);
if( pipe(pout) != 0){
return(-1);
}
/* Create child process. The child inherits the open stdio files.
* The fork can fail if swap space is full or if we have too many processes.
*/
while ((gio->pid = fork()) == -1) {
if (--maxforks == 0) {
close(pin[0]); close(pin[1]);
close(pout[0]); close(pout[1]);
return(-1);
}
sleep (2);
}
if(gio->pid == 0) {
/* New child process. Make child think the pipe is its stdin/out.
*/
close(pin[0]);
close(pout[1]);
close(0); dup (pout[0]); close(pout[0]);
close(1); dup (pin[1]); close(pin[1]);
/* run through shell so that we expand shell meta characters */
argv[0] = "sh";
argv[1] = "-c";
argv[2] = cmd;
argv[3] = NULL;
/* Exec the new process. Will not return if successful. */
execvp(argv[0], (void *)argv);
/* If we get here the new process could not be executed for some
* reason. Shutdown, calling _exit to avoid flushing parent's
* io buffers.
*/
_exit(1);
} else {
/* Existing, parent process. */
close(pin[1]);
close(pout[0]);
if( strchr(mode, 'r') )
gio->ifd = pin[0];
else{
close(pin[0]);
}
if( strchr(mode, 'w') )
gio->ofd = pout[1];
else{
close(pout[1]);
}
}
/* clean up and return */
return(0);
}
/*
*
* gopenpipe -- open a command pipe
*
*/
#ifdef ANSI_FUNC
static GIO
gopenpipe (char *name, char *mode)
#else
static GIO gopenpipe(name, mode)
char *name;
char *mode;
#endif
{
GIO gio;
char *s;
/* allocate the new struct */
if( (gio = gnew()) == NULL )
return(NULL);
/* skip past prefix */
s = name;
if( !strncasecmp(s, "pipe:", 5) ) s += 5;
while( isspace((int)*s) ) s++;
/* start the piped process */
if( gexec(gio, s, mode) != 0 ){
gclose(gio);
return(NULL);
}
/* fill in the record */
gio->name = xstrdup(s);
gio->mode = xstrdup(mode);
gio->type = GIO_PIPE;
gio->extend = 0;
return(gio);
}
/*
*
* giohostip -- convert ascii host into ip number
*
*/
#ifdef ANSI_FUNC
static unsigned int
giohostip (char *xhost)
#else
static unsigned int giohostip(xhost)
char *xhost;
#endif
{
struct hostent *hostent;
unsigned int ip;
char temp[SZ_LINE];
/* null input means current host */
if( (xhost == NULL) || (*xhost == '\0') || !strncmp(xhost, "$host", 5) ){
gethostname(temp, SZ_LINE);
} else {
strcpy(temp, xhost);
}
/* special check */
if( !strcmp(temp, "$localhost") ){
return(0x7F000001);
}
/*
* Try looking by address (i.e., host is something like "128.84.253.1").
* Do this first because it's much faster (no trip to the DNS)
*/
if( (int)(ip = inet_addr(temp)) != -1 ){
return(ntohl(ip));
}
/*
* Try looking it up by name. If successful, the IP address is in
* hostent->h_addr_list[0]
*/
if( (hostent = gethostbyname(temp)) != NULL ){
memcpy(&ip, hostent->h_addr_list[0], (size_t)hostent->h_length);
return(ntohl(ip));
}
/* could not convert */
return(0);
}
/*
*
* gioparseipport -- parse ascii string into a host and port
*
*/
#ifdef ANSI_FUNC
static int
gioparseipport (char *host, unsigned int *ip, unsigned short *port)
#else
static int gioparseipport(host, ip, port)
char *host;
unsigned int *ip;
unsigned short *port;
#endif
{
char *s1, *p1, *p2;
int got;
/* start out pessimistically */
*ip = 0;
*port = 0;
/* make sure we have something to work with */
if( !host || !*host )
return(0);
/* we null out ':' (so that what comes before is the host name) and
bump past it to point to the port */
s1 = xstrdup(host);
if( !(p1 = (char *)strchr(s1, ':')) ){
got = 0;
goto done;
}
*p1 = '\0';
p1++;
/* get port */
p2 = NULL;
*port = (unsigned short)strtol(p1, &p2, 0);
/* check for bad port number -- we lose */
if( *port <=0 || (p1 == p2) ){
*port = 0;
got = 0;
goto done;
}
/* convert ip string (might be null) to an ip address */
if( (*ip = giohostip(s1)) == 0 ){
*port = 0;
got = 0;
}
else{
got = 1;
}
done:
xfree(s1);
return(got);
}
/*
*
* gopensocket -- open a socket for reading and/or writing
*
*/
#ifdef ANSI_FUNC
static GIO
gopensocket (char *name, char *mode)
#else
static GIO gopensocket(name, mode)
char *name;
char *mode;
#endif
{
char *s;
char tbuf[SZ_LINE];
int fd=-1;
int fd2=-1;
int status;
int tries;
int reuse_addr=1;
int doaccept=-1;
unsigned int ip;
unsigned short port;
socklen_t slen;
struct sockaddr_in sock_in;
struct timeval tv;
fd_set readfds;
GIO gio;
/* allocate a new struct */
if( (gio = gnew()) == NULL )
return(NULL);
/* skip past prefix */
s = name;
if( !strncasecmp(s, "socket:", 7) ) s += 7;
while( isspace((int)*s) ) s++;
/* if $host is the socket, we might also be specifying whether we
connect ($host_c[onnect]) or accept ($host_a[ccept]). This allows
either end to initiate the connection */
if( !strncasecmp(s, "$host_a", 7) ){
doaccept = 1;
s = strchr(s,':');
}
else if( !strncasecmp(s, "$host_c", 7) ){
doaccept = 0;
s = strchr(s,':');
}
while( isspace((int)*s) ) s++;
/* get host and port number */
if( !gioparseipport(s, &ip, &port) )
goto error;
if( doaccept < 0 ){
/* see whether we accept or connect */
if( ip != giohostip(NULL) ){
doaccept = 0;
}
else{
if( strchr(mode, 'w') ){
doaccept = 0;
}
else{
doaccept = 1;
}
}
}
/* open socket for reading, i.e., reading 'stdin' from another host */
if( doaccept ){
/* set up listening socket, which will accept connection */
if( (fd = socket(AF_INET, SOCK_STREAM, 0)) < 0 )
goto error;
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
(char *)&reuse_addr, sizeof(reuse_addr));
memset((char *)&sock_in, 0, sizeof(sock_in));
sock_in.sin_family = AF_INET;
sock_in.sin_addr.s_addr = htonl(INADDR_ANY);
sock_in.sin_port = htons(port);
/* bind to a port */
if( bind(fd, (struct sockaddr *)&sock_in, sizeof(sock_in)) < 0 )
goto error;
/* listen for connections */
if( listen(fd, 5) < 0 )
goto error;
/* use select() to wait for a connect, so that we can timeout */
FD_ZERO(&readfds);
FD_SET(fd, &readfds);
tv.tv_sec = GIO_TIMEOUT;
tv.tv_usec = 0;
if( select(fd+1, &readfds, NULL, NULL, &tv) <=0)
goto error;
/* accept connection -- the goal of our striving */
slen = sizeof(struct sockaddr_in);
if((fd2=accept(fd, (struct sockaddr *)&sock_in, &slen)) <0)
goto error;
/* done with the listening socket */
close(fd);
/* make sure we close on exec */
xfcntl(fd2, F_SETFD, FD_CLOEXEC);
setsockopt(fd2, SOL_SOCKET, SO_REUSEADDR,
(char *)&reuse_addr, sizeof(reuse_addr));
/* make sure the right fd is set properly */
if( strchr(mode, 'r') ) gio->ifd = fd2;
if( strchr(mode, 'w') ) gio->ofd = fd2;
}
/* open socket for writing, i.e., writing to 'stdout' on another host */
else{
tries = GIO_RETRIES;
/* if we opened a socket for reading, use the next port for writing */
if( gio->ifd >=0 )
port++;
again:
if( (fd2 = socket(AF_INET, SOCK_STREAM, 0)) < 0 ){
gerror(stderr, "can't open socket (%s)\n", name);
gfree(gio);
return(NULL);
}
memset((char *)&sock_in, 0, sizeof(sock_in));
sock_in.sin_family = AF_INET;
sock_in.sin_addr.s_addr = htonl(ip);
sock_in.sin_port = htons(port);
/* try connecting to the specified socket */
status=connect(fd2, (struct sockaddr *)&sock_in, sizeof(sock_in));
/* handle error */
if( status != 0 ){
close(fd2);
/* if the other process is not ready, we can wait a bit */
if( (errno == ECONNREFUSED) && (--tries >0) ){
gsleep(10);
goto again;
}
else{
goto error;
}
}
/* make sure we close on exec */
xfcntl(fd2, F_SETFD, FD_CLOEXEC);
setsockopt(fd2, SOL_SOCKET, SO_REUSEADDR,
(char *)&reuse_addr, sizeof(reuse_addr));
/* make sure the right fd is set properly */
if( strchr(mode, 'r') ) gio->ifd = fd2;
if( strchr(mode, 'w') ) gio->ofd = fd2;
}
/* fill in the record */
gio->name = xstrdup(s);
gio->mode = xstrdup(mode);
gio->type = GIO_SOCKET;
gio->extend = 0;
/* return the good news */
return(gio);
error:
snprintf(tbuf, SZ_LINE-1, "in %s: %s\n", name, strerror(errno));
gerror(stderr, tbuf);
if( fd >=0 ) close(fd);
return(NULL);
}
/*
*
* gopenstdio -- open stdin or stdout
*
*/
#ifdef ANSI_FUNC
static GIO
gopenstdio (char *name, char *mode)
#else
static GIO gopenstdio(name, mode)
char *name;
char *mode;
#endif
{
GIO gio;
/* allocate a new struct */
if( (gio = gnew()) == NULL )
return(NULL);
if( !strncasecmp(name, "stdout", 6) ||
(!strncmp(name, "-", 1) && strchr(mode, 'w')) ){
if( strchr(mode, 'r') ){
gerror(stderr, "can't open STDOUT for reading\n");
gfree(gio);
return(NULL);
}
else{
/* fill in the record */
gio->name = xstrdup("stdout");
gio->mode = xstrdup(mode);
gio->type = GIO_STREAM;
gio->extend = 0;
gio->fp = stdout;
}
}
/* look for stdin */
else if( !strncasecmp(name, "stdin", 5) ||
(!strncmp(name, "-", 1) && strchr(mode, 'r')) ){
if( strchr(mode, 'w') ){
gerror(stderr, "can't open STDIN for writing\n");
gfree(gio);
return(NULL);
}
else{
/* fill in the record */
gio->name = xstrdup("stdin");
gio->mode = xstrdup(mode);
gio->type = GIO_STREAM;
gio->extend = 0;
gio->fp = stdin;
}
}
else{
gerror(stderr, "invalid stdout specification (%s)\n", name);
gfree(gio);
return(NULL);
}
/* return the good news */
return(gio);
}
#ifdef HAVE_SYS_SHM_H
/*
*
* gopenshm -- open shared memory for reading or writing
*
*/
#ifdef ANSI_FUNC
static GIO
gopenshm (char *name, char *mode)
#else
static GIO gopenshm(name, mode)
char *name;
char *mode;
#endif
{
GIO gio;
int shmid=-1;
int shmkey=-1;
int shmflg=0;
int shmlen=0;
int smode=0;
char *shmaddr=NULL;
char *shmbuf;
char *s, *t;
struct shmid_ds buf;
/* allocate a new struct */
if( (gio = gnew()) == NULL )
return(NULL);
/* skip past prefix */
s = name;
if( !strncasecmp(s, "shm:", 4) ) s += 4;
while( isspace((int)*s) ) s++;
/* fill in the record */
gio->name = xstrdup(s);
gio->mode = xstrdup(mode);
gio->type = GIO_SHM;
gio->extend = 0;
/* parse the shared memory specification */
if( !s || !*s ){
gerror(stderr, "missing shared memory specification\n");
goto error;
}
/* @ => shmkey, otherwise shmid */
if( *s == '@' ){
s++;
if( !strncasecmp(s, "IPC_PRIVATE", 11) ){
shmkey = IPC_PRIVATE;
s += 11;
}
else{
shmkey = strtol(s, &t, 0);
s = t;
}
}
else{
shmid = strtol(s, &t, 0);
s = t;
}
/* get length parameter, if necessary */
if( *s == ':' ){
s++;
shmlen = strtol(s, &t, 0);
s = t;
}
/* convert key to id, if necessary */
if( shmid == -1 ){
if( shmkey != -1 ){
/* create if segment des not exist */
if( strstr(mode, "w+") ){
smode = 0664|IPC_CREAT;
}
/* open for reading and/or writing */
else{
if( strchr(mode, 'w') )
smode |= 0600;
if( strchr(mode, 'r') )
smode |= 0400;
}
/* get shared memory area identifier */
shmid = shmget(shmkey, shmlen, smode);
}
else{
gerror(stderr, "invalid shared memory key (%s)\n", name);
goto error;
}
/* at this point, we better have one */
if( shmid == -1 ){
gerror(stderr, "invalid shared memory id (%s)\n", name);
goto error;
}
}
/* get (optional) max len we are allowed to access (def: whole segment) */
if( shmctl(shmid, IPC_STAT, &buf) == 0 ){
if( (shmlen <= 0) || ((size_t)shmlen > buf.shm_segsz) ){
shmlen = buf.shm_segsz;
}
}
else{
gerror(stderr, "can't determine memory mapping length (%s)\n", name);
goto error;
}
/* finally ... map shared memory containing data */
shmbuf = (char *)shmat(shmid, shmaddr, shmflg);
if( shmbuf == (char *)-1){
gerror(stderr, "can't map shared memory image (%s)\n", name);
goto error;
}
/* set the access parameters */
gio->buf = shmbuf;
gio->len = shmlen;
gio->cur = 0;
gio->shmid = shmid;
/* return the good news */
return(gio);
error:
gfree(gio);
return(NULL);
}
#endif
#ifdef HAVE_SYS_MMAN_H
/*
*
* gopenmmap -- open memory mapped file for reading or writing
*
*/
#ifdef ANSI_FUNC
static GIO
gopenmmap (char *name, char *mode)
#else
static GIO gopenmmap(name, mode)
char *name;
char *mode;
#endif
{
GIO gio;
int prot;
int flags;
int len;
char *buf;
char *s;
struct stat statbuf;
/* allocate a new struct */
if( (gio = gnew()) == NULL )
return(NULL);
/* skip past prefix */
s = name;
if( !strncasecmp(s, "mmap:", 5) ) s += 5;
while( isspace((int)*s) ) s++;
/* fill in the record */
gio->name = xstrdup(s);
gio->mode = xstrdup(mode);
gio->type = GIO_MMAP;
/* open the file */
gio->fp = fopen(s, gio->mode);
if( gio->fp == NULL ){
gerror(stderr, "can't open data file (%s)\n", s);
goto error;
}
fstat(fileno(gio->fp), &statbuf);
len = statbuf.st_size;
prot = 0;
if( strchr(mode, 'r') ) prot |= PROT_READ;
if( strchr(mode, 'w') ) prot |= PROT_WRITE;
flags = MAP_PRIVATE;
buf = mmap(NULL, len, prot, flags, fileno(gio->fp), 0);
fclose(gio->fp);
if( buf == NULL ){
gerror(stderr, "can't mmap data file (%s)\n", s);
goto error;
}
gio->buf = (void *)buf;
gio->len = len;
gio->cur = 0;
if( strchr(mode, 'w') )
gio->extend = 1;
else
gio->extend = 0;
/* return the good news */
return(gio);
error:
gfree(gio);
return(NULL);
}
#endif
/*
*
* gopengzip -- open gzip'ed for reading or writing
*
*/
#ifdef ANSI_FUNC
static GIO
gopengzip (char *name, char *mode)
#else
static GIO gopengzip(name, mode)
char *name;
char *mode;
#endif
{
GIO gio;
char *s;
/* allocate a new struct */
if( (gio = gnew()) == NULL )
return(NULL);
/* skip past prefix */
s = name;
if( !strncasecmp(s, "gzip:", 5) ) s += 5;
while( isspace((int)*s) ) s++;
/* fill in the record */
gio->name = xstrdup(s);
gio->mode = xstrdup(mode);
gio->type = GIO_GZIP;
gio->extend = 1;
/* open stdin specially */
if( !strncasecmp(name, "stdin", 5) ||
(!strncmp(name, "-", 1) && strchr(mode, 'r')) ){
gio->gz = (void *)gzdopen(dup(fileno(stdin)), gio->mode);
}
/* open stdout specially */
else if( !strncasecmp(name, "stdout", 6) ||
(!strncmp(name, "-", 1) && strchr(mode, 'w')) ){
gio->gz = (void *)gzdopen(dup(fileno(stdout)), gio->mode);
}
/* open the file */
else{
gio->gz = (void *)gzopen(s, gio->mode);
}
if( gio->gz == NULL ){
gerror(stderr, "can't open gzip'ed data file (%s)\n", s);
goto error;
}
else{
return(gio);
}
error:
gfree(gio);
return(NULL);
}
#ifdef ANSI_FUNC
static void *
_ggets (GIO gio, char *obuf, int len)
#else
static void *_ggets(gio, obuf, len)
GIO gio;
char *obuf;
int len;
#endif
{
int i, j, l;
char *s=NULL;
char *t=NULL;
/* existence of crbuf => we already determined that the data uses cr
instead of newline for end of line */
if( gio->crbuf ){
/* make sure we have a large enough buffer */
if( len > gio->crlen ){
gio->crbuf = xrealloc(gio->crbuf, len);
gio->crlen = len;
}
/* grab from existing buffer, reading from file when necessary */
for(i=0, j=0; i<(len-1);){
/* did we reach the end of the cr buffer? */
if( gio->crbuf[j] == '\0' ){
/* yes, try to get more */
if( !(s=fgets(gio->crbuf, gio->crlen, gio->fp)) ) break;
/* reset cr buffer pointer to beginning */
j = 0;
/* continue processing at beginning of buffer */
continue;
}
/* transfer character from cr buffer to output */
obuf[i] = gio->crbuf[j];
/* look for CR as end of line */
if( obuf[i] == '\r' ){
/* change it to a new-line */
obuf[i++] = '\n';
/* shift rest of start of cr buffer */
memmove(gio->crbuf, &(gio->crbuf[j+1]), strlen(&(gio->crbuf[j+1]))+1);
/* bump cr bbuf pointer */
j++;
break;
}
else{
/* bump pointers to both buffers */
i++; j++;
}
}
obuf[i] = '\0';
return((void *)obuf);
}
/* hopefully we have a nice, new-line delimited file */
else{
/* get next line, the usual way */
s = fgets(obuf, len, gio->fp);
/* return if we don't want t check, have no data, or already checked */
if( !_gcrnl || !s || gio->crlen ) return s;
/* if we did not get a new-line at the end, we either have a very long
line, or we have a cr-delimited file */
l = strlen(s);
/* look for standard new-line */
if( s[l-1] == '\n' ){
/* found one -- flag that we have checked this file and return */
gio->crlen=len;
return s;
}
/* look for cr */
if( !(t=strchr(s, '\r')) ){
/* no new-line and no cr -- we'll have to check the next line as well */
return s;
}
/* its cr-delimited */
gio->crbuf = xmalloc(len);
gio->crlen=len;
/* copy everything after the cr to a save buffer */
memmove(gio->crbuf, t+1, (s+l)-t);
/* change cr to new-line */
*t = '\n';
/* null terminate */
*(t+1) = '\0';
return (void *)obuf;
}
}
/*
*
* gopenfile -- open ordinary file for reading or writing
*
*/
#ifdef ANSI_FUNC
static GIO
gopenfile (char *name, char *mode)
#else
static GIO gopenfile(name, mode)
char *name;
char *mode;
#endif
{
char *s;
GIO gio;
/* allocate a new struct */
if( (gio = gnew()) == NULL )
return(NULL);
/* skip past prefix */
s = name;
if( !strncasecmp(s, "file:", 5) ) s += 5;
if( !strncasecmp(s, "unfile:", 7) ){
gio->unbuffered = 1;
s += 7;
}
while( isspace((int)*s) ) s++;
/* fill in the record */
gio->name = xstrdup(s);
gio->type = GIO_DISK;
gio->extend = 1;
gio->mode = xstrdup(mode);
/* open the file */
gio->fp = fopen(s, gio->mode);
if( gio->fp == NULL ){
gerror(stderr, "can't open data file (%s)\n", s);
goto error;
}
else{
return(gio);
}
error:
gfree(gio);
return(NULL);
}
/*
*
* Public Routines
*
*/
/*
*
* gopen -- open a file or a stream
*
*/
#ifdef ANSI_FUNC
GIO
gopen (char *fname, char *mode)
#else
GIO gopen(fname, mode)
char *fname;
char *mode;
#endif
{
GIO gio;
unsigned int ip;
unsigned short port;
off_t len=0;
char name[SZ_LINE];
char *buf=NULL;
char *tname=NULL;
char *s, *t;
/* make sure we have a valid fname */
if( (fname==NULL) || (*fname=='\0') )
return(NULL);
/* escape clause so that we can NOT convert cr to nl in ggets */
if( (s=getenv("GCRNL")) ){
if( istrue(s) )
_gcrnl = 1;
else if( isfalse(s) )
_gcrnl = 0;
}
/* make a temp file name */
tname = xstrdup(fname);
/* remove the bracket extension for everything except pipes */
if( strncasecmp(tname, "pipe:", 5) ){
if( (s=strchr(tname, '[')) ) *s = '\0';
}
/* expand environment variables to get working filename */
ExpandEnv (tname, name, SZ_LINE-1);
/* look for command pipe */
if( !strncasecmp(name, "pipe:", 5) || strchr(mode, 'p') )
gio = gopenpipe(name, mode);
#ifdef HAVE_SYS_MMAN_H
/* look for a mapped file */
else if( !strncasecmp(name, "mmap:", 5) || strchr(mode, 'm') )
gio = gopenmmap(name, mode);
#endif
#ifdef HAVE_SYS_SHM_H
/* look for shared memory segment */
else if( !strncasecmp(name, "shm:", 4) || strchr(mode, 's') )
gio = gopenshm(name, mode);
#endif
/* look for data in memory (ordinary buffer) */
else if( !strncasecmp(name, "mem:", 4) ||
!strncasecmp(name, "buf:", 4) || strchr(mode, 'b') ){
s = name;
if( !strncasecmp(name, "mem:", 4) || !strncasecmp(name, "buf:", 4) )
s += 4;
buf = (char *)strtoul(s, &t, 0);
if( *t != ':' ){
gerror(stderr, "illegal memory buffer specification (%s)\n", name);
gio = NULL;
}
else{
len = (off_t)strtoul(++t, NULL, 0);
gio = gmemopen(buf, len, mode);
}
}
/* look for an explicit file */
else if( !strncasecmp(name, "file:", 5) ||
!strncasecmp(name, "unfile:", 7) || strchr(mode, 'u') )
gio = gopenfile(name, mode);
/* look for stdio */
else if( (!strncasecmp(name, "stdin", 5) ||
!strncasecmp(name, "stdout", 6)) &&
!(gext(name) && !strcmp(gext(name),".gz")) )
gio = gopenstdio(name, mode);
else if( (*name == '-') && ((*(name+1) == '\0') || (*(name+1) == '[')) )
gio = gopenstdio(name, mode);
/* look for a socket, in the form machine:port */
else if( gioparseipport(name, &ip, &port) )
gio = gopensocket(name, mode);
/* look for gzip'ed file */
else if( !strncasecmp(name, "gzip:", 5) ||
(gext(name) && !strcmp(gext(name),".gz")) )
gio = gopengzip(name, mode);
/* if all else fails, its an ordinary file */
else
gio = gopenfile(name, mode);
/* free working space */
if( tname ) xfree(tname);
/* return results */
return(gio);
}
/*
*
* gmemopen -- open memory for reading or writing
*
*/
#ifdef ANSI_FUNC
GIO
gmemopen (char *buf, off_t len, char *mode)
#else
GIO gmemopen(buf, len, mode)
char *buf;
off_t len;
char *mode;
#endif
{
GIO gio;
/* allocate a new struct */
if( (gio = gnew()) == NULL )
return(NULL);
/* fill in the record */
gio->name = xstrdup("MEMORY");
gio->mode = xstrdup(mode);
gio->type = GIO_MEMORY;
/* process open type */
if( strchr(mode, 'w') ){
if( (buf!=NULL) && (len>0) ){
gio->buf = (void *)buf;
gio->len = len;
}
else{
gio->buf = (char *)xmalloc(GIO_BUFINC);
gio->len = GIO_BUFINC;
}
gio->cur = 0;
gio->extend = 1;
} else {
gio->buf = (void *)buf;
gio->len = len;
gio->cur = 0;
gio->extend = 0;
}
/* return the news */
return(gio);
}
/*
*
* _gread -- read bytes from a data I/O structure
*
*/
#ifdef ANSI_FUNC
void *
_gread (GIO gio, char *buf, size_t size, size_t n, size_t *got)
#else
void *_gread(gio, buf, size, n, got)
GIO gio;
char *buf;
size_t size;
size_t n;
size_t *got;
#endif
{
char *obuf;
char *tptr;
int get;
int tgot;
/* got nothing yet */
*got = 0;
/* sanity checks */
if( gio==NULL )
return(NULL);
if( !strchr(gio->mode, 'r') && !strstr(gio->mode, "w+") ){
gerror(stderr,
"illegal read operation on write-only data (%s)\n", gio->name);
return(NULL);
}
/* try to read */
switch(gio->type){
case GIO_DISK:
if( buf )
obuf = buf;
else
obuf = (char *)xmalloc(size*n);
if( gio->unbuffered ){
for(tptr=obuf, get=size*n; get>0; get -= tgot){
tgot = read(fileno(gio->fp), tptr, get);
if( tgot <0 ) {
*got = tgot;
break;
}
if( tgot == 0 ){
break;
}
else{
*got += tgot;
tptr += tgot;
}
}
if( *got >0 )
*got /= size;
}
else{
*got = fread(obuf, size, n, gio->fp);
}
if( *got <= 0 ){
if( !buf )
xfree(obuf);
obuf = NULL;
}
return(obuf);
case GIO_STREAM:
if( buf )
obuf = buf;
else
obuf = (char *)xmalloc(size*n);
*got = fread(obuf, size, n, gio->fp);
if( *got <= 0 ){
if( !buf )
xfree(obuf);
obuf = NULL;
}
return(obuf);
case GIO_MEMORY:
return(gmemread(gio, buf, size, n, got));
#ifdef HAVE_SYS_MMAN_H
case GIO_MMAP:
return(gmemread(gio, buf, size, n, got));
#endif
#ifdef HAVE_SYS_SHM_H
case GIO_SHM:
return(gmemread(gio, buf, size, n, got));
#endif
case GIO_PIPE:
if( buf )
obuf = buf;
else
obuf = (char *)xmalloc(size*n);
if( gio->ifd >=0 ){
for(tptr=obuf, get=size*n; get>0; get -= tgot){
tgot = read(gio->ifd, tptr, get);
if( tgot <0 ) {
*got = tgot;
break;
}
else if( tgot ==0 ) {
break;
}
else{
*got += tgot;
tptr += tgot;
}
}
if( *got > 0 )
*got /= size;
}
if( *got <= 0 ){
if( !buf )
xfree(obuf);
obuf = NULL;
}
else{
gio->cur += *got;
}
return(obuf);
case GIO_SOCKET:
if( buf )
obuf = buf;
else
obuf = (char *)xmalloc(size*n);
if( gio->ifd >=0 ){
for(tptr=obuf, get=size*n; get>0; get -= tgot){
tgot = recv(gio->ifd, tptr, get, 0);
if( tgot <0 ) {
*got = tgot;
break;
}
else if( tgot == 0 ) {
break;
}
else{
*got += tgot;
tptr += tgot;
}
}
if( *got > 0 )
*got /= size;
}
if( *got <= 0 ){
if( !buf )
xfree(obuf);
obuf = NULL;
}
else{
gio->cur += *got;
}
return(obuf);
case GIO_GZIP:
if( buf )
obuf = buf;
else
obuf = (char *)xmalloc(size*n);
*got = gzread(gio->gz, obuf, size * n);
if( *got <= 0 ){
if( !buf )
xfree(obuf);
obuf = NULL;
}
if( *got >0 )
*got /= size;
return(obuf);
default:
return(NULL);
}
}
/*
*
* gread -- read bytes from a data I/O structure
*
*/
#ifdef ANSI_FUNC
size_t
gread (GIO gio, char *buf, size_t size, size_t n)
#else
size_t gread(gio, buf, size, n)
GIO gio;
char *buf;
size_t size;
size_t n;
#endif
{
size_t got;
if( buf == NULL )
return(0);
_gread(gio, buf, size, n, &got);
return (got);
}
/*
*
* gwrite -- write bytes to a structure
*
*/
#ifdef ANSI_FUNC
size_t
gwrite (GIO gio, char *buf, size_t size, size_t n)
#else
size_t gwrite(gio, buf, size, n)
GIO gio;
char *buf;
size_t size;
size_t n;
#endif
{
int got=0;
/* sanity checks */
if( gio==NULL )
return(0);
if( !strchr(gio->mode, 'w') && !strchr(gio->mode, 'a') &&
!strstr(gio->mode, "r+") ){
gerror(stderr,
"illegal write operation on read-only data (%s)\n", gio->name);
return(0);
}
switch(gio->type){
case GIO_DISK:
if( gio->unbuffered ){
got = write(fileno(gio->fp), buf, size*n);
if( got > 0 ) got /= size;
}
else{
got = fwrite(buf, size, n, gio->fp);
}
break;
case GIO_STREAM:
got = fwrite(buf, size, n, gio->fp);
break;
case GIO_MEMORY:
got = gmemwrite(gio, buf, size, n);
break;
#ifdef HAVE_SYS_MMAN_H
case GIO_MMAP:
got = gmemwrite(gio, buf, size, n);
break;
#endif
#ifdef HAVE_SYS_SHM_H
case GIO_SHM:
got = gmemwrite(gio, buf, size, n);
break;
#endif
case GIO_PIPE:
if( gio->ofd >= 0 ){
got = write(gio->ofd, buf, size * n);
if( got > 0 ){
gio->cur += got;
got /= size;
}
}
break;
case GIO_SOCKET:
if( gio->ofd >= 0 ){
got = send(gio->ofd, buf, size * n, 0);
if( got > 0 ){
gio->cur += got;
got /= size;
}
}
break;
case GIO_GZIP:
got = gzwrite(gio->gz, buf, size*n);
if( got >=0 ) got /= size;
break;
default:
break;
}
return(got);
}
#ifdef ANSI_FUNC
void *
ggets (GIO gio, char *buf, int len)
#else
void *ggets(gio, buf, len)
GIO gio;
char *buf;
int len;
#endif
{
int i=0;
int got;
char *obuf=NULL;
/* sanity checks */
if( !gio )
return NULL;
if( !strchr(gio->mode, 'r') && !strstr(gio->mode, "w+") ){
gerror(stderr,
"illegal read operation on write-only data (%s)\n", gio->name);
return NULL;
}
/* allocate buffer, if necessary */
if( buf )
obuf = buf;
else
obuf = (char *)xmalloc(len);
/* start out clean */
*obuf = '\0';
switch(gio->type){
case GIO_STREAM:
_ggets(gio, obuf, len);
if( !obuf || !*obuf ){
if( !buf ) xfree(obuf);
obuf = NULL;
}
return obuf;
case GIO_DISK:
if( !gio->unbuffered ){
_ggets(gio, obuf, len);
if( !obuf || !*obuf ){
if( !buf ) xfree(obuf);
obuf = NULL;
}
return obuf;
}
default:
/* grab characters up to a new-line or max len */
while( i < (len-1) ){
got = gread(gio, &(obuf[i]), sizeof(char), 1);
if( got < 0 ){
i = 0;
break;
}
else if( got == 0 )
break;
else if( obuf[i] == '\n' ){
i++;
break;
}
else if( (obuf[i] == '\r') && _gcrnl ){
obuf[i] = '\n';
i++;
break;
}
else{
i++;
}
}
obuf[i] = '\0';
if( i == 0 ){
if( !buf ) xfree(obuf);
obuf = NULL;
}
return((void *)obuf);
}
}
#ifdef __STDC__
int
gprintf(GIO gio, char *format, ...)
{
int got;
va_list args;
va_start(args, format);
#else
int gprintf(va_alist) va_dcl
{
GIO gio
char *format;
int got;
va_list args;
va_start(args);
gio = va_arg(args, GIO);
format = va_arg(args, char *);
#endif
got = vsnprintf(_gtbuf, GBUFSZ, format, args);
if( got > GBUFSZ ){
gerror(stderr, "gprintf string too long (%d > %d)\n", got, GBUFSZ);
return -1;
}
else{
return gwrite(gio, _gtbuf, sizeof(char), strlen(_gtbuf));
}
}
/*
*
* gflush -- flush I/O
*
*/
#ifdef ANSI_FUNC
int
gflush (GIO gio)
#else
int gflush(gio)
GIO gio;
#endif
{
/* sanity checks */
if( gio==NULL )
return(-1);
switch(gio->type){
case GIO_DISK:
if( gio->unbuffered )
return(0);
else
return(fflush(gio->fp));
case GIO_STREAM:
return(fflush(gio->fp));
case GIO_MEMORY:
return(0);
#ifdef HAVE_SYS_MMAN_H
case GIO_MMAP:
return(0);
#endif
#ifdef HAVE_SYS_SHM_H
case GIO_SHM:
return(0);
#endif
case GIO_PIPE:
return(0);
case GIO_SOCKET:
return(0);
case GIO_GZIP:
return(0);
default:
return(-1);
}
}
/*
*
* gseek -- set current pointer position in a "file"
*
*/
#ifdef ANSI_FUNC
off_t
gseek (GIO gio, off_t offset, int whence)
#else
off_t gseek(gio, offset, whence)
GIO gio;
off_t offset;
int whence;
#endif
{
off_t opos;
/* sanity checks */
if( gio==NULL )
return(-1);
switch(gio->type){
case GIO_DISK:
if( gio->unbuffered )
return(lseek(fileno(gio->fp), offset, whence));
else{
#if USE_FSEEKO
opos = ftello(gio->fp);
if( fseeko(gio->fp, offset, whence) == 0 ){
return(opos);
}
else{
return(-1);
}
#else
opos = ftell(gio->fp);
if( fseek(gio->fp, (long)offset, whence) == 0 ){
return(opos);
}
else{
return(-1);
}
#endif
}
case GIO_STREAM:
if( whence == SEEK_CUR )
return( gskip(gio, offset) );
else{
#if USE_FSEEKO
opos = ftello(gio->fp);
if( fseeko(gio->fp, offset, whence) == 0 ){
return(opos);
}
else{
return(-1);
}
#else
opos = ftell(gio->fp);
if( fseek(gio->fp, (long)offset, whence) == 0 ){
return(opos);
}
else{
return(-1);
}
#endif
}
case GIO_MEMORY:
return(gmemseek(gio, offset, whence));
#ifdef HAVE_SYS_MMAN_H
case GIO_MMAP:
return(gmemseek(gio, offset, whence));
#endif
#ifdef HAVE_SYS_SHM_H
case GIO_SHM:
return(gmemseek(gio, offset, whence));
#endif
case GIO_PIPE:
if( whence == SEEK_CUR )
return( gskip(gio, offset) );
else
return(-1);
case GIO_SOCKET:
if( whence == SEEK_CUR )
return( gskip(gio, offset) );
else
return(-1);
case GIO_GZIP:
return(gzseek(gio->gz, offset, whence));
default:
return(-1);
}
}
/*
*
* gtell -- return current pointer position in a "file"
*
*/
#ifdef ANSI_FUNC
off_t
gtell (GIO gio)
#else
off_t gtell(gio)
GIO gio;
#endif
{
#if USE_FTELLO
off_t lval;
#else
long lval;
#endif
/* sanity checks */
if( gio==NULL )
return((off_t)-1);
switch(gio->type){
case GIO_DISK:
if( gio->unbuffered )
return(lseek(fileno(gio->fp), 0, SEEK_CUR));
else
#if USE_FTELLO
return(ftello(gio->fp));
#else
return(ftell(gio->fp));
#endif
case GIO_STREAM:
#if USE_FTELLO
lval = ftello(gio->fp);
#else
lval = ftell(gio->fp);
#endif
if( lval >=0 )
return lval;
else
return gio->cur;
case GIO_MEMORY:
return(gio->cur);
#ifdef HAVE_SYS_MMAN_H
case GIO_MMAP:
return(gio->cur);
#endif
#ifdef HAVE_SYS_SHM_H
case GIO_SHM:
return(gio->cur);
#endif
case GIO_PIPE:
return(gio->cur);
case GIO_SOCKET:
return(gio->cur);
case GIO_GZIP:
return(gztell(gio->gz));
default:
return((off_t)-1);
}
}
/*
*
* gskip - skip reading bytes to a file position
*
*/
#ifdef ANSI_FUNC
int
gskip (GIO gio, off_t n)
#else
int gskip(gio, n)
GIO gio;
off_t n;
#endif
{
char buf[1];
/* sanity checks */
if( !gio )
return(-1);
/* nothing to do */
if( !n )
return 0;
switch(gio->type){
case GIO_DISK:
if( gio->unbuffered )
return(lseek(fileno(gio->fp), n, SEEK_CUR));
else
#if USE_FSEEKO
return(fseeko(gio->fp, n, SEEK_CUR));
#else
return(fseek(gio->fp, (long)n, SEEK_CUR));
#endif
case GIO_STREAM:
/* for stdin, read the bytes */
if( gio->fp == stdin ){
if( n < 0 )
return(-1);
while( n-- ){
if( fread(buf, sizeof(char), 1, gio->fp) != 1 )
return(0);
}
return(0);
}
/* who knows what will happen here */
else{
#if USE_FSEEKO
return(fseeko(gio->fp, n, SEEK_CUR));
#else
return(fseek(gio->fp, (long)n, SEEK_CUR));
#endif
}
case GIO_MEMORY:
if( (gio->cur + n >= gio->len) || (gio->cur + n <0) ){
return(-1);
}
else{
gio->cur += n;
return(0);
}
#ifdef HAVE_SYS_MMAN_H
case GIO_MMAP:
if( (gio->cur + n >= gio->len) || (gio->cur + n <0) ){
return(-1);
}
else{
gio->cur += n;
return(0);
}
#endif
#ifdef HAVE_SYS_SHM_H
case GIO_SHM:
if( (gio->cur + n >= gio->len) || (gio->cur + n <0) ){
return(-1);
}
else{
gio->cur += n;
return(0);
}
#endif
case GIO_PIPE:
if( n < 0 )
return(-1);
if( gio->ifd >= 0 ){
while( n-- ){
if( read(gio->ifd, buf, 1) != 1 )
return(0);
gio->cur++;
}
return(0);
}
else{
return(-1);
}
case GIO_SOCKET:
if( n < 0 )
return(-1);
if( gio->ifd >= 0 ){
while( n-- ){
if( recv(gio->ifd, buf, 1, 0) != 1 )
return(0);
gio->cur++;
}
return(0);
}
else{
return(-1);
}
case GIO_GZIP:
return(gzseek(gio->gz, (z_off_t)n, SEEK_CUR));
default:
return(-1);
}
}
/*
*
* ginfo -- return information about a "file"
*
*/
#ifdef ANSI_FUNC
int
ginfo (GIO gio, char **name, int *type, off_t *cur, char **buf, int *len)
#else
int ginfo(gio, name, type, cur, buf, len)
GIO gio;
char **name;
int *type;
off_t *cur;
char **buf;
int *len;
#endif
{
if( gio==NULL )
return(-1);
if( name )
*name = gio->name;
if( type )
*type = gio->type;
if( cur )
*cur = gtell(gio);
if( buf )
*buf = gio->buf;
if( len )
*len = gio->len;
return(0);
}
/*
*
* gfreebuf -- free allocated data buffers
*
*/
#ifdef ANSI_FUNC
void
gfreebuf (GIO gio, void *buf)
#else
void gfreebuf(gio, buf)
GIO gio;
void *buf;
#endif
{
if( (gio==NULL) )
return;
switch(gio->type){
case GIO_DISK:
if( buf )
xfree(buf);
break;
case GIO_STREAM:
if( buf )
xfree(buf);
break;
case GIO_MEMORY:
break;
#ifdef HAVE_SYS_MMAN_H
case GIO_MMAP:
break;
#endif
#ifdef HAVE_SYS_SHM_H
case GIO_SHM:
break;
#endif
case GIO_PIPE:
if( buf )
xfree(buf);
break;
case GIO_SOCKET:
if( buf )
xfree(buf);
break;
case GIO_GZIP:
if( buf )
xfree(buf);
break;
default:
break;
}
}
/*
*
* gclose -- close an I/O structure
*
*/
#ifdef ANSI_FUNC
void
gclose (GIO gio)
#else
void gclose(gio)
GIO gio;
#endif
{
int status;
/* sanity checks */
if( gio==NULL )
return;
switch(gio->type){
case GIO_DISK:
if( gio->unbuffered ){
fclose(gio->fp);
}
else{
fflush(gio->fp);
fclose(gio->fp);
}
break;
case GIO_STREAM:
fflush(gio->fp);
/* close stream, but don't close a stdio stream */
if( (gio->fp != stdin) && (gio->fp != stdout) && (gio->fp != stderr) )
fclose(gio->fp);
break;
#ifdef HAVE_SYS_MMAN_H
case GIO_MMAP:
munmap(gio->buf, gio->len);
break;
#endif
case GIO_MEMORY:
break;
#ifdef HAVE_SYS_SHM_H
case GIO_SHM:
/* unmap shared memory segment */
shmdt(gio->buf);
/* in write+ mode, we try to destroy the shared memory as well */
if( strstr(gio->mode, "w+") ) shmctl(gio->shmid, IPC_RMID, NULL);
break;
#endif
case GIO_PIPE:
if( gio->ifd >=0 )
close(gio->ifd);
if( gio->ofd >=0 )
close(gio->ofd);
if( gio->pid )
waitpid(gio->pid, &status, 0);
break;
case GIO_SOCKET:
if( gio->ifd >=0 )
close(gio->ifd);
else if( gio->ofd >=0 )
close(gio->ofd);
break;
case GIO_GZIP:
gzclose(gio->gz);
break;
default:
break;
}
gfree(gio);
}
/*
*
* gerrorstring -- return last exception string
*
*/
#ifdef ANSI_FUNC
char *
gerrorstring(void)
#else
char *gerrorstring()
#endif
{
return(_gerrors);
}
/*
*
* setgerror -- set the error flag
*
*/
#ifdef ANSI_FUNC
int
setgerror(int flag)
#else
int setgerror(flag)
int flag;
#endif
{
int oflag;
oflag = _gerror;
_gerror = flag;
return oflag;
}
/*
*
* gerror - error message handler
* actions based on value of error flag:
*
* flag action
* ---- ------
* 0 store error message in _gerrors string
* 1 store, print error message and continue
* 2 print error message and exit
*
*/
#ifdef __STDC__
void gerror(FILE *fd, char *format, ...)
{
char tbuf[SZ_LINE];
va_list args;
va_start(args, format);
#else
void gerror(va_alist) va_dcl
{
FILE *fd;
char *format;
char tbuf[SZ_LINE];
va_list args;
va_start(args);
fd = va_arg(args, FILE *);
format = va_arg(args, char *);
#endif
/* initialize level, if not already done */
if( _gerror == -1 ){
char *s;
if( (s=getenv("GERROR")) )
_gerror = atoi(s);
else
_gerror = 2;
}
snprintf(tbuf, SZ_LINE-1, "ERROR: %s", format);
vsnprintf(_gerrors, SZ_LINE-1, tbuf, args);
/* if the error flag is positive, we output immediately */
if( (fd != NULL) && _gerror ){
fputs(_gerrors, fd);
fflush(fd);
}
/* if the error flag is set high, we exit */
if( _gerror >= 2 )
exit(_gerror);
}
/*
*
* gwarningstring -- return last exception string
*
*/
#ifdef ANSI_FUNC
char *
gwarningstring(void)
#else
char *gwarningstring()
#endif
{
return(_gwarnings);
}
/*
*
* setgwarning -- set the warning flag
*
*/
#ifdef ANSI_FUNC
int
setgwarning(int flag)
#else
int setgwarning(flag)
int flag;
#endif
{
int oflag;
oflag = _gwarning;
_gwarning = flag;
return oflag;
}
#ifdef __STDC__
void gwarning(FILE *fd, char *format, ...)
{
char tbuf[SZ_LINE];
va_list args;
va_start(args, format);
#else
void gwarning(va_alist) va_dcl
{
FILE *fd;
char *format;
char tbuf[SZ_LINE];
va_list args;
va_start(args);
fd = va_arg(args, FILE *);
format = va_arg(args, char *);
#endif
/* initialize level, if not already done */
if( _gwarning == -1 ){
char *s;
if( (s=getenv("GWARNING")) )
_gwarning = atoi(s);
else
_gwarning = 1;
}
snprintf(tbuf, SZ_LINE-1, "WARNING: %s", format);
vsnprintf(_gwarnings, SZ_LINE-1, tbuf, args);
/* if the warning flag is positive, we output immediately */
if( (fd != NULL) && _gwarning ){
fputs(_gwarnings, fd);
fflush(fd);
}
}
#ifdef ANSI_FUNC
void
gsleep (int msec)
#else
void gsleep(msec)
int msec;
#endif
{
struct timeval tv;
if( msec > 0 ){
tv.tv_sec = msec / 1000;
tv.tv_usec = (msec % 1000) * 1000;
select(1, NULL, NULL, NULL, &tv);
}
}
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