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79 lines
1.5 KiB
C
79 lines
1.5 KiB
C
/*LINTLIBRARY*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#define max(A,B) (((A)<(B))?(B):(A))
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extern char *mktemp();
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extern int access();
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static char *cpdir();
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static char *seed="AAA";
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/* BSD stdio.h doesn't define P_tmpdir, so let's do it here */
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#ifndef P_tmpdir
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static char *P_tmpdir = "/tmp";
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#endif
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char *
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tempnam(dir, prefix)
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char *dir; /* use this directory please (if non-NULL) */
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char *prefix; /* use this (if non-NULL) as filename prefix */
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{
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register char *p, *q, *tmpdir;
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int tl=0, dl=0, pl;
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pl = strlen(P_tmpdir);
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if( (tmpdir = getenv("TMPDIR")) != NULL ) tl = strlen(tmpdir);
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if( dir != NULL ) dl = strlen(dir);
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if( (p = malloc((unsigned)(max(max(dl,tl),pl)+16))) == NULL )
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return(NULL);
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*p = '\0';
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if( (tl == 0) || (access( cpdir(p, tmpdir), 3) != 0) )
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if( (dl == 0) || (access( cpdir(p, dir), 3) != 0) )
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if( access( cpdir(p, P_tmpdir), 3) != 0 )
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if( access( cpdir(p, "/tmp"), 3) != 0 )
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return(NULL);
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(void) strcat(p, "/");
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if(prefix)
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{
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*(p+strlen(p)+5) = '\0';
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(void)strncat(p, prefix, 5);
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}
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(void)strcat(p, seed);
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(void)strcat(p, "XXXXXX");
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q = seed;
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while(*q == 'Z') *q++ = 'A';
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++*q;
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if(*mktemp(p) == '\0') return(NULL);
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return(p);
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}
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static char *
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cpdir(buf, str)
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char *buf;
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char *str;
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{
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char *p;
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if(str != NULL)
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{
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(void) strcpy(buf, str);
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p = buf - 1 + strlen(buf);
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if(*p == '/') *p = '\0';
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}
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return(buf);
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}
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