Rev 8149 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
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| 10 | reyssat | 1 | /* Copyright (C) 2002-2003 XIAO, Gang of Universite de Nice - Sophia Antipolis |
| 2 | * |
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| 3 | * This program is free software; you can redistribute it and/or modify |
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| 4 | * it under the terms of the GNU General Public License as published by |
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| 5 | * the Free Software Foundation; either version 2 of the License, or |
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| 6 | * (at your option) any later version. |
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| 7 | * |
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| 8 | * This program is distributed in the hope that it will be useful, |
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| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 11 | * GNU General Public License for more details. |
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| 12 | * |
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| 13 | * You should have received a copy of the GNU General Public License |
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| 14 | * along with this program; if not, write to the Free Software |
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| 15 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 16 | */ |
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| 17 | |||
| 18 | /* dvi 2 gif driver, tex standard */ |
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| 19 | |||
| 8103 | bpr | 20 | #include "texgif.h" |
| 21 | |||
| 8195 | bpr | 22 | void texgif_error(char *s) |
| 10 | reyssat | 23 | { |
| 24 | fprintf(stderr,"%s: %s\n",progname, s); |
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| 25 | exit(1); |
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| 26 | } |
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| 27 | |||
| 28 | unsigned long int texint(void *bp, int l) |
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| 29 | { |
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| 30 | unsigned long int o, t; |
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| 31 | unsigned char c, *p; |
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| 32 | int i; |
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| 33 | o=t=0; p=bp; |
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| 34 | for(i=0;i<l;i++) { |
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| 35 | c=p[i]; t=c; o<<=8; o+=t; |
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| 36 | } |
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| 37 | return o; |
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| 38 | } |
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| 39 | |||
| 40 | long int texintsigned(void *bp, int l) |
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| 41 | { |
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| 42 | long int o, t; |
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| 43 | signed char c, *p; |
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| 44 | int i; |
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| 45 | if(l<=0) return 0; |
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| 46 | p=bp; o=*p; |
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| 47 | for(i=1;i<l;i++) { |
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| 48 | c=p[i]; t=c; o<<=8; o|=t&255; |
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| 49 | } |
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| 50 | return o; |
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| 51 | } |
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| 52 | |||
| 8149 | bpr | 53 | /* get the content of a file, and store in buf. */ |
| 10 | reyssat | 54 | int getfile(char *fname, unsigned char **buf) |
| 55 | { |
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| 56 | FILE *f; |
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| 57 | long l, l2; |
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| 8082 | bpr | 58 | |
| 10 | reyssat | 59 | f=fopen(fname,"r"); if(f==NULL) return -1; |
| 60 | fseek(f,0,SEEK_END); l=ftell(f); fseek(f,0,SEEK_SET); |
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| 61 | if(l>FILE_LENGTH_LIMIT || l<=0) { |
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| 62 | fclose(f); return -1; |
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| 63 | } |
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| 64 | *buf=xmalloc(l+16); |
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| 65 | l2=fread(*buf,1,l,f); fclose(f); |
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| 66 | if(l!=l2) { |
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| 67 | free(*buf); return -1; |
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| 68 | } |
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| 69 | return l; |
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| 70 | } |
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| 71 | |||
| 72 | int execredirected(char *cmdf, char *inf, char *outf, char *errf, char *arg[]) |
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| 73 | { |
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| 74 | pid_t pid; |
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| 75 | int status; |
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| 76 | |||
| 77 | fflush(NULL); /* flush all output streams before forking |
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| 78 | * otherwise they will be doubled */ |
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| 79 | pid=fork(); if(pid==-1) return -1; |
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| 80 | if(!pid) { /* child */ |
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| 3835 | kbelabas | 81 | if(inf!=NULL && freopen(inf,"r",stdin) == NULL) |
| 8195 | bpr | 82 | texgif_error("freopen failure"); |
| 3835 | kbelabas | 83 | if(outf!=NULL && freopen(outf,"w",stdout)) |
| 8195 | bpr | 84 | texgif_error("freopen failure"); |
| 3835 | kbelabas | 85 | if(errf!=NULL && freopen(errf,"w",stderr)) |
| 8195 | bpr | 86 | texgif_error("freopen failure"); |
| 10 | reyssat | 87 | if(wrapexec) { |
| 88 | setreuid(getuid(),getuid());setregid(getgid(),getgid()); |
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| 89 | } |
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| 90 | if(strchr(cmdf,'/')) execv(cmdf,arg); |
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| 91 | else execvp(cmdf,arg); |
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| 92 | exit(127); |
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| 93 | } |
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| 94 | else { /* parent */ |
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| 95 | status=0; waitpid(pid,&status,0); |
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| 96 | return WEXITSTATUS(status); |
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| 97 | } |
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| 98 | } |
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| 99 | |||
| 8149 | bpr | 100 | /* system(), but with variable parms |
| 101 | * Uses sh to execute command. |
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| 102 | */ |
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| 10 | reyssat | 103 | int call_sh(char *s,...) |
| 104 | { |
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| 105 | va_list vp; |
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| 106 | char buf[MAX_LINELEN+1]; |
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| 107 | char *parmbuf[4]; |
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| 108 | int t; |
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| 109 | |||
| 110 | va_start(vp,s); |
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| 111 | vsnprintf(buf,sizeof(buf),s,vp); |
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| 112 | va_end(vp); |
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| 113 | parmbuf[0]="sh"; parmbuf[1]="-c"; parmbuf[2]=buf; parmbuf[3]=NULL; |
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| 114 | wrapexec=0; |
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| 115 | t=execredirected("sh",NULL,NULL,NULL,parmbuf); |
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| 116 | sync(); return t; |
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| 117 | } |
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| 118 |