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| 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 | |||
| 20 | void error(char *s) |
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| 21 | { |
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| 22 | fprintf(stderr,"%s: %s\n",progname, s); |
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| 23 | exit(1); |
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| 24 | } |
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| 25 | |||
| 26 | void *xmalloc(size_t n) |
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| 27 | { |
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| 28 | void *p; |
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| 29 | p=malloc(n); |
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| 30 | if(p==NULL) error("Malloc failure."); |
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| 31 | return p; |
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| 32 | } |
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| 33 | |||
| 34 | unsigned long int texint(void *bp, int l) |
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| 35 | { |
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| 36 | unsigned long int o, t; |
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| 37 | unsigned char c, *p; |
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| 38 | int i; |
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| 39 | o=t=0; p=bp; |
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| 40 | for(i=0;i<l;i++) { |
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| 41 | c=p[i]; t=c; o<<=8; o+=t; |
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| 42 | } |
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| 43 | return o; |
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| 44 | } |
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| 45 | |||
| 46 | long int texintsigned(void *bp, int l) |
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| 47 | { |
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| 48 | long int o, t; |
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| 49 | signed char c, *p; |
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| 50 | int i; |
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| 51 | if(l<=0) return 0; |
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| 52 | p=bp; o=*p; |
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| 53 | for(i=1;i<l;i++) { |
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| 54 | c=p[i]; t=c; o<<=8; o|=t&255; |
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| 55 | } |
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| 56 | return o; |
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| 57 | } |
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| 58 | |||
| 59 | /* Strips leading spaces */ |
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| 60 | char *find_word_start(char *p) |
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| 61 | { |
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| 62 | int i; |
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| 63 | for(i=0; isspace(*p); p++,i++); |
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| 64 | return p; |
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| 65 | } |
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| 66 | |||
| 67 | /* Points to the end of the word */ |
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| 68 | char *find_word_end(char *p) |
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| 69 | { |
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| 70 | int i; |
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| 71 | for(i=0;!isspace(*p) && *p!=0 && i<MAX_LINELEN; p++,i++); |
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| 72 | return p; |
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| 73 | } |
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| 74 | |||
| 75 | /* searches a list. Returns index if found, -1 if nomatch. |
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| 76 | * Uses binary search, list must be sorted. */ |
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| 77 | int search_list(void *list, int items, size_t item_size, const char *str) |
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| 78 | { |
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| 79 | int i1,i2,j,k; |
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| 80 | char **p; |
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| 81 | char c; |
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| 82 | |||
| 83 | if(items<=0) return -1; |
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| 84 | j=0; c=*str; |
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| 85 | p=list; |
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| 86 | k=**p-c; if(k==0) k=strcmp(*p,str); |
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| 87 | if(k==0) return k; if(k>0) return -1; |
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| 88 | p=list+(items-1)*item_size; |
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| 89 | k=**p-c; if(k==0) k=strcmp(*p,str); |
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| 90 | if(k==0) return items-1; if(k<0) return -1; |
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| 91 | for(i1=0,i2=items-1;i2>i1+1;) { |
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| 92 | j=i1+(i2-i1)/2; |
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| 93 | p=list+(j*item_size); |
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| 94 | k=**p-c; if(k==0) k=strcmp(*p,str); |
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| 95 | if(k==0) return j; |
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| 96 | if(k>0) {i2=j; continue;} |
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| 97 | if(k<0) {i1=j; continue;} |
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| 98 | } |
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| 99 | return -1; |
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| 100 | } |
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| 101 | |||
| 102 | /* get the content of a file, and store in buf. */ |
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| 103 | int getfile(char *fname, unsigned char **buf) |
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| 104 | { |
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| 105 | FILE *f; |
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| 106 | long l, l2; |
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| 107 | |||
| 108 | f=fopen(fname,"r"); if(f==NULL) return -1; |
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| 109 | fseek(f,0,SEEK_END); l=ftell(f); fseek(f,0,SEEK_SET); |
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| 110 | if(l>FILE_LENGTH_LIMIT || l<=0) { |
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| 111 | fclose(f); return -1; |
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| 112 | } |
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| 113 | *buf=xmalloc(l+16); |
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| 114 | l2=fread(*buf,1,l,f); fclose(f); |
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| 115 | if(l!=l2) { |
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| 116 | free(*buf); return -1; |
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| 117 | } |
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| 118 | return l; |
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| 119 | } |
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| 120 | |||
| 121 | int execredirected(char *cmdf, char *inf, char *outf, char *errf, char *arg[]) |
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| 122 | { |
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| 123 | pid_t pid; |
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| 124 | int status; |
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| 125 | |||
| 126 | fflush(NULL); /* flush all output streams before forking |
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| 127 | * otherwise they will be doubled */ |
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| 128 | pid=fork(); if(pid==-1) return -1; |
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| 129 | if(!pid) { /* child */ |
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| 130 | if(inf!=NULL) freopen(inf,"r",stdin); |
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| 131 | if(outf!=NULL) freopen(outf,"w",stdout); |
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| 132 | if(errf!=NULL) freopen(errf,"w",stderr); |
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| 133 | if(wrapexec) { |
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| 134 | setreuid(getuid(),getuid());setregid(getgid(),getgid()); |
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| 135 | } |
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| 136 | if(strchr(cmdf,'/')) execv(cmdf,arg); |
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| 137 | else execvp(cmdf,arg); |
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| 138 | exit(127); |
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| 139 | } |
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| 140 | else { /* parent */ |
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| 141 | status=0; waitpid(pid,&status,0); |
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| 142 | return WEXITSTATUS(status); |
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| 143 | } |
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| 144 | } |
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| 145 | |||
| 146 | /* system(), but with variable parms |
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| 147 | * Uses sh to execute command. */ |
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| 148 | int call_sh(char *s,...) |
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| 149 | { |
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| 150 | va_list vp; |
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| 151 | char buf[MAX_LINELEN+1]; |
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| 152 | char *parmbuf[4]; |
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| 153 | int t; |
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| 154 | |||
| 155 | va_start(vp,s); |
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| 156 | vsnprintf(buf,sizeof(buf),s,vp); |
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| 157 | va_end(vp); |
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| 158 | parmbuf[0]="sh"; parmbuf[1]="-c"; parmbuf[2]=buf; parmbuf[3]=NULL; |
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| 159 | wrapexec=0; |
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| 160 | t=execredirected("sh",NULL,NULL,NULL,parmbuf); |
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| 161 | sync(); return t; |
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| 162 | } |
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| 163 | |||
| 164 | /* recursively generate a directory structure */ |
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| 165 | void mkdirs(char *s) |
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| 166 | { |
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| 167 | struct stat st; |
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| 168 | char *buf; |
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| 169 | if(stat(s,&st)==-1) { |
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| 170 | if(strrchr(s,'/')!=NULL) { |
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| 171 | buf=xmalloc(strlen(s)+1); |
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| 172 | strcpy(buf,s); *strrchr(buf,'/')=0; |
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| 173 | mkdirs(buf); free(buf); |
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| 174 | } |
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| 175 | mkdir(s,-1); |
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| 176 | } |
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| 177 | } |
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| 178 |