| 1 |
greg |
2.1 |
/* Copyright (c) 1992 Regents of the University of California */
|
| 2 |
|
|
|
| 3 |
|
|
#ifndef lint
|
| 4 |
|
|
static char SCCSid[] = "$SunId$ LBL";
|
| 5 |
|
|
#endif
|
| 6 |
|
|
|
| 7 |
|
|
/*
|
| 8 |
|
|
* popen() and pclose() calls for systems without pipe facilities
|
| 9 |
|
|
*/
|
| 10 |
|
|
|
| 11 |
|
|
#include <stdio.h>
|
| 12 |
|
|
#include <ctype.h>
|
| 13 |
|
|
#include "paths.h"
|
| 14 |
|
|
|
| 15 |
|
|
#ifndef NFILE
|
| 16 |
|
|
#define NFILE 32
|
| 17 |
|
|
#endif
|
| 18 |
|
|
|
| 19 |
|
|
static struct {
|
| 20 |
|
|
char *f; /* file name, NULL if inactive */
|
| 21 |
|
|
char *c; /* command if writing */
|
| 22 |
|
|
} pips[NFILE];
|
| 23 |
|
|
|
| 24 |
|
|
|
| 25 |
|
|
FILE *
|
| 26 |
|
|
popen(cmd, mode) /* open command for reading or writing */
|
| 27 |
|
|
register char *cmd;
|
| 28 |
|
|
char *mode;
|
| 29 |
|
|
{
|
| 30 |
|
|
extern FILE *fopen();
|
| 31 |
|
|
extern char *malloc(), *mktemp(), *strcpy();
|
| 32 |
|
|
static int fnum = 0;
|
| 33 |
|
|
FILE *fp;
|
| 34 |
|
|
char *newcmd, *fname;
|
| 35 |
|
|
register char *cp, *cp2 = NULL;
|
| 36 |
|
|
int quote = '\0', paren = 0;
|
| 37 |
|
|
|
| 38 |
|
|
fname = malloc(TEMPLEN+1);
|
| 39 |
|
|
newcmd = malloc(TEMPLEN+6+strlen(cmd));
|
| 40 |
|
|
if (fname == NULL | newcmd == NULL)
|
| 41 |
|
|
return(NULL);
|
| 42 |
|
|
mktemp(strcpy(fname,TEMPLATE));
|
| 43 |
|
|
/* build our command */
|
| 44 |
|
|
for (cp = newcmd; ; cmd++) {
|
| 45 |
|
|
switch (*cmd) {
|
| 46 |
greg |
2.2 |
case '\'':
|
| 47 |
greg |
2.1 |
case '"':
|
| 48 |
|
|
if (!quote)
|
| 49 |
|
|
quote = *cmd;
|
| 50 |
|
|
else if (quote == *cmd)
|
| 51 |
|
|
quote = '\0';
|
| 52 |
greg |
2.2 |
#ifdef MSDOS
|
| 53 |
|
|
else
|
| 54 |
|
|
break;
|
| 55 |
|
|
*cp++ = '"'; /* double quotes only */
|
| 56 |
|
|
continue;
|
| 57 |
|
|
#else
|
| 58 |
greg |
2.1 |
break;
|
| 59 |
greg |
2.2 |
#endif
|
| 60 |
greg |
2.3 |
#ifndef MSDOS
|
| 61 |
greg |
2.1 |
case '(':
|
| 62 |
|
|
if (!quote)
|
| 63 |
|
|
paren++;
|
| 64 |
|
|
break;
|
| 65 |
|
|
case ')':
|
| 66 |
|
|
if (!quote && paren)
|
| 67 |
|
|
paren--;
|
| 68 |
|
|
break;
|
| 69 |
|
|
case '\\':
|
| 70 |
|
|
if (!quote && cmd[1] == '\n') {
|
| 71 |
|
|
*cp++ = ' ';
|
| 72 |
|
|
cmd++;
|
| 73 |
|
|
continue;
|
| 74 |
|
|
}
|
| 75 |
|
|
*cp++ = *cmd++;
|
| 76 |
greg |
2.2 |
break;
|
| 77 |
greg |
2.3 |
#endif
|
| 78 |
greg |
2.2 |
case ' ':
|
| 79 |
|
|
case '\t':
|
| 80 |
|
|
if (!quote)
|
| 81 |
|
|
while (isspace(cmd[1]))
|
| 82 |
|
|
cmd++;
|
| 83 |
greg |
2.1 |
break;
|
| 84 |
|
|
case '|':
|
| 85 |
|
|
case ';':
|
| 86 |
|
|
if (!quote && !paren && cp2 == NULL)
|
| 87 |
|
|
cp2 = fname;
|
| 88 |
|
|
break;
|
| 89 |
|
|
case '\n':
|
| 90 |
|
|
case '\0':
|
| 91 |
|
|
if (cp2 == NULL)
|
| 92 |
|
|
cp2 = fname;
|
| 93 |
|
|
break;
|
| 94 |
|
|
}
|
| 95 |
|
|
if (cp2 == fname && *mode == 'w') { /* add input file */
|
| 96 |
|
|
*cp++ = ' '; *cp++ = '<'; *cp++ = ' ';
|
| 97 |
|
|
while (*cp2)
|
| 98 |
|
|
*cp++ = *cp2++;
|
| 99 |
|
|
*cp++ = ' ';
|
| 100 |
|
|
}
|
| 101 |
|
|
if (!(*cp = *cmd))
|
| 102 |
|
|
break;
|
| 103 |
|
|
cp++;
|
| 104 |
|
|
}
|
| 105 |
|
|
if (*mode == 'r') { /* add output file */
|
| 106 |
|
|
while (isspace(cp[-1]) || cp[-1] == ';')
|
| 107 |
|
|
cp--;
|
| 108 |
|
|
*cp++ = ' '; *cp++ = '>'; *cp++ = ' ';
|
| 109 |
|
|
while (*cp2)
|
| 110 |
|
|
*cp++ = *cp2++;
|
| 111 |
|
|
*cp = '\0';
|
| 112 |
|
|
system(newcmd); /* execute command first */
|
| 113 |
|
|
}
|
| 114 |
|
|
if ((fp = fopen(fname, mode)) == NULL) { /* open file */
|
| 115 |
|
|
free(fname);
|
| 116 |
|
|
free(newcmd);
|
| 117 |
|
|
return(NULL);
|
| 118 |
|
|
}
|
| 119 |
|
|
if (fileno(fp) >= NFILE) {
|
| 120 |
greg |
2.3 |
eputs("popen: too many open files\n");
|
| 121 |
|
|
quit(1);
|
| 122 |
greg |
2.1 |
}
|
| 123 |
|
|
pips[fileno(fp)].f = fname;
|
| 124 |
|
|
if (*mode == 'r') {
|
| 125 |
|
|
free(newcmd);
|
| 126 |
|
|
pips[fileno(fp)].c = NULL;
|
| 127 |
|
|
} else
|
| 128 |
|
|
pips[fileno(fp)].c = newcmd;
|
| 129 |
|
|
return(fp);
|
| 130 |
|
|
}
|
| 131 |
|
|
|
| 132 |
|
|
|
| 133 |
|
|
pclose(fp) /* close pipe and cleanup */
|
| 134 |
|
|
FILE *fp;
|
| 135 |
|
|
{
|
| 136 |
|
|
register int pn = fileno(fp);
|
| 137 |
|
|
|
| 138 |
|
|
if (pn >= NFILE || pips[pn].f == NULL || fclose(fp) == -1)
|
| 139 |
|
|
return(-1);
|
| 140 |
|
|
if (pips[pn].c != NULL) {
|
| 141 |
|
|
system(pips[pn].c); /* execute command last */
|
| 142 |
|
|
free(pips[pn].c);
|
| 143 |
|
|
}
|
| 144 |
|
|
unlink(pips[pn].f); /* remove temp file */
|
| 145 |
|
|
free(pips[pn].f);
|
| 146 |
|
|
pips[pn].f = NULL;
|
| 147 |
|
|
return(0);
|
| 148 |
|
|
}
|
