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00048 #include "vsh_p.h"
00049 #include "vpup.h"
00050
00051 VEMBED(rcsid="$Id: vpup.c,v 1.10 2008/03/12 05:13:58 fetk Exp $")
00052
00053
00054
00055 #if !defined(HAVE_WINSOCK_H) && defined(VPUP_SHELL)
00056 VPRIVATE int Vpup_makeargv(char *s, const char *delimiters, char ***argvp);
00057 VPRIVATE int Vpup_parseDelim(char *s, char delimiter, char **v);
00058 VPRIVATE int Vpup_reDir(char *infilename, char *outfilename);
00059 VPRIVATE int Vpup_connPipe(char *cmd, int *frontfd, int *backfd);
00060 #endif
00061
00062
00063
00064
00065
00066
00067 #if !defined(VINLINE_MALOC)
00068
00069 #endif
00070
00071
00072
00073
00074
00075
00076 #if !defined(HAVE_WINSOCK_H) && defined(VPUP_SHELL)
00077
00078
00079
00080
00081
00082
00083
00084
00085
00086 VPUBLIC void Vpup_execCmd(const char *PR, int argc, char **argv, char *inbuf)
00087 {
00088 char **chargv;
00089 pid_t child_pid;
00090 char *cmd;
00091 char *nextcmd;
00092 int frontfd[2];
00093 int backfd[2];
00094
00095 frontfd[0] = -1;
00096 frontfd[1] = -1;
00097 backfd[0] = -1;
00098 backfd[1] = -1;
00099 child_pid = 0;
00100
00101 if ((nextcmd = inbuf) == VNULL) exit(1);
00102
00103 while (1) {
00104
00105 cmd = nextcmd;
00106 if (cmd == VNULL) break;
00107
00108
00109 if ((nextcmd = strchr(nextcmd, VPIPE_SYMBOL)) == VNULL) {
00110 backfd[1] = -1;
00111 child_pid = 0;
00112
00113
00114 } else {
00115 *nextcmd = VNULL_SYMBOL;
00116 nextcmd++;
00117 if (pipe(backfd)== -1) {
00118 perror(PR);
00119 exit(1);
00120 } else if ((child_pid = fork()) == -1) {
00121 perror(PR);
00122 exit(1);
00123 }
00124 }
00125
00126
00127 if (child_pid == 0) {
00128 if (Vpup_connPipe(cmd, frontfd, backfd) == -1) {
00129 perror(PR);
00130 exit(1);
00131 } else if (Vpup_makeargv(cmd, VBLANK_STRING, &chargv) > 0) {
00132 if (execvp(chargv[0], chargv) == -1) {
00133 perror(PR);
00134
00135 }
00136 }
00137 exit(1);
00138 }
00139
00140
00141 close(frontfd[0]);
00142 close(frontfd[1]);
00143 frontfd[0] = backfd[0];
00144 frontfd[1] = backfd[1];
00145 }
00146 close(backfd[0]);
00147 close(backfd[1]);
00148 exit(1);
00149 }
00150
00151
00152
00153
00154
00155
00156
00157
00158
00159
00160 VPRIVATE int Vpup_makeargv(char *s, const char *delimiters, char ***argvp)
00161 {
00162 char *t;
00163 char *snew;
00164 int numtokens;
00165 int i;
00166 unsigned int size;
00167
00168
00169 snew = s + strspn(s, delimiters);
00170
00171
00172 if ((t = calloc(strlen(snew) + 1, sizeof(char))) == VNULL) {
00173 *argvp = VNULL;
00174 numtokens = -1;
00175
00176
00177 } else {
00178
00179
00180 strcpy(t, snew);
00181 if (strtok(t, delimiters) == VNULL)
00182 numtokens = 0;
00183 else
00184 for (numtokens=1; strtok(VNULL,delimiters) != VNULL; numtokens++);
00185
00186
00187 size = (unsigned int)(numtokens + 1);
00188 if ((*argvp = calloc(size, sizeof(char *))) == VNULL) {
00189 free(t);
00190 numtokens = -1;
00191
00192
00193 } else {
00194 if (numtokens > 0) {
00195 strcpy(t, snew);
00196 **argvp = strtok(t, delimiters);
00197 for (i=1; i<numtokens+1; i++)
00198 *((*argvp)+i) = strtok(VNULL, delimiters);
00199 } else {
00200 **argvp = VNULL;
00201 free(t);
00202 }
00203 }
00204 }
00205 return numtokens;
00206 }
00207
00208
00209
00210
00211
00212
00213
00214
00215
00216
00217 VPRIVATE int Vpup_parseDelim(char *s, char delimiter, char **v)
00218 {
00219 char *p;
00220 char *q;
00221 int offset;
00222 int error = 0;
00223
00224
00225 *v = NULL;
00226 if ((p = strchr(s, delimiter)) != NULL) {
00227
00228
00229 if ((q = (char *)malloc(strlen(p + 1) + 1)) == NULL)
00230 error = -1;
00231
00232 else {
00233 strcpy(q, p + 1);
00234 if ((*v = strtok(q, VDELIM_SET)) == NULL) error = -1;
00235 offset = strlen(q);
00236 strcpy(p, p + offset + 1);
00237 }
00238 }
00239 return error;
00240 }
00241
00242
00243
00244
00245
00246
00247
00248
00249
00250
00251 VPRIVATE int Vpup_reDir(char *infilename, char *outfilename)
00252 {
00253 int indes;
00254 int outdes;
00255
00256
00257 if (infilename != VNULL) {
00258 if ((indes = open(infilename, O_RDONLY, VSTDMODE)) == -1)
00259 return -1;
00260 if (dup2(indes, STDIN_FILENO) == -1) {
00261 close(indes);
00262 return -1;
00263 }
00264 close(indes);
00265 }
00266
00267
00268 if (outfilename != VNULL) {
00269 if ((outdes=open(outfilename,O_WRONLY|O_CREAT|O_TRUNC,VSTDMODE))==-1)
00270 return -1;
00271 if (dup2(outdes, STDOUT_FILENO) == -1) {
00272 close(outdes);
00273 return -1;
00274 }
00275 close(outdes);
00276 }
00277 return 0;
00278 }
00279
00280
00281
00282
00283
00284
00285
00286
00287
00288
00289 VPRIVATE int Vpup_connPipe(char *cmd, int *frontfd, int *backfd)
00290 {
00291 int error = 0;
00292 char *infilename, *outfilename;
00293
00294
00295 if (Vpup_parseDelim(cmd, VRDIN_SYMBOL, &infilename) == -1)
00296 error = -1;
00297
00298
00299 else if (infilename != VNULL && frontfd[0] != -1)
00300 error = -1;
00301
00302
00303 else if (Vpup_parseDelim(cmd, VRDOUT_SYMBOL, &outfilename) == -1)
00304 error = -1;
00305
00306
00307 else if (outfilename != VNULL && backfd[1] != -1)
00308 error = -1;
00309
00310
00311 else if (Vpup_reDir(infilename, outfilename) == -1)
00312 error = -1;
00313
00314
00315 else {
00316 if (frontfd[0] != -1) {
00317 if (dup2(frontfd[0], STDIN_FILENO) == -1)
00318 error = -1;
00319 }
00320 if (backfd[1] != -1) {
00321 if (dup2(backfd[1], STDOUT_FILENO) == -1)
00322 error = -1;
00323 }
00324 }
00325
00326
00327 close (frontfd[0]);
00328 close (frontfd[1]);
00329 close (backfd[0]);
00330 close (backfd[1]);
00331 return error;
00332 }
00333 #else
00334
00335
00336
00337
00338
00339
00340
00341
00342
00343
00344 VPUBLIC void Vpup_execCmd(const char *PR, int argc, char **argv, char *inbuf)
00345 {
00346 Vnm_exec(argc,argv);
00347 }
00348 #endif
00349