diff options
Diffstat (limited to 'src/cmd/mk/archive.c')
-rw-r--r-- | src/cmd/mk/archive.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/src/cmd/mk/archive.c b/src/cmd/mk/archive.c new file mode 100644 index 00000000..9ba7a12d --- /dev/null +++ b/src/cmd/mk/archive.c @@ -0,0 +1,180 @@ +#include "mk.h" +#define ARMAG "!<arch>\n" +#define SARMAG 8 + +#define ARFMAG "`\n" +#define SARNAME 16 + +struct ar_hdr +{ + char name[SARNAME]; + char date[12]; + char uid[6]; + char gid[6]; + char mode[8]; + char size[10]; + char fmag[2]; +}; +#define SAR_HDR (SARNAME+44) + +static int dolong; + +static void atimes(char *); +static char *split(char*, char**); + +long +atimeof(int force, char *name) +{ + Symtab *sym; + long t; + char *archive, *member, buf[512]; + + archive = split(name, &member); + if(archive == 0) + Exit(); + + t = mtime(archive); + sym = symlook(archive, S_AGG, 0); + if(sym){ + if(force || (t > (long)sym->value)){ + atimes(archive); + sym->value = (void *)t; + } + } + else{ + atimes(archive); + /* mark the aggegate as having been done */ + symlook(strdup(archive), S_AGG, "")->value = (void *)t; + } + /* truncate long member name to sizeof of name field in archive header */ + if(dolong) + snprint(buf, sizeof(buf), "%s(%s)", archive, member); + else + snprint(buf, sizeof(buf), "%s(%.*s)", archive, SARNAME, member); + sym = symlook(buf, S_TIME, 0); + if (sym) + return (long)sym->value; /* uggh */ + return 0; +} + +void +atouch(char *name) +{ + char *archive, *member; + int fd, i; + struct ar_hdr h; + long t; + + archive = split(name, &member); + if(archive == 0) + Exit(); + + fd = open(archive, ORDWR); + if(fd < 0){ + fd = create(archive, OWRITE, 0666); + if(fd < 0){ + fprint(2, "create %s: %r\n", archive); + Exit(); + } + write(fd, ARMAG, SARMAG); + } + if(symlook(name, S_TIME, 0)){ + /* hoon off and change it in situ */ + LSEEK(fd, SARMAG, 0); + while(read(fd, (char *)&h, sizeof(h)) == sizeof(h)){ + for(i = SARNAME-1; i > 0 && h.name[i] == ' '; i--) + ; + h.name[i+1]=0; + if(strcmp(member, h.name) == 0){ + t = SARNAME-sizeof(h); /* ughgghh */ + LSEEK(fd, t, 1); + fprint(fd, "%-12ld", time(0)); + break; + } + t = atol(h.size); + if(t&01) t++; + LSEEK(fd, t, 1); + } + } + close(fd); +} + +static void +atimes(char *ar) +{ + struct ar_hdr h; + long t; + int fd, i; + char buf[BIGBLOCK]; + char name[sizeof(h.name)+1]; + + fd = open(ar, OREAD); + if(fd < 0) + return; + + if(read(fd, buf, SARMAG) != SARMAG){ + close(fd); + return; + } + while(read(fd, (char *)&h, sizeof(h)) == sizeof(h)){ + t = atol(h.date); + if(t == 0) /* as it sometimes happens; thanks ken */ + t = 1; + strncpy(name, h.name, sizeof(h.name)); + for(i = sizeof(h.name)-1; i > 0 && name[i] == ' '; i--) + ; + if(name[i] == '/') /* system V bug */ + i--; + name[i+1]=0; + sprint(buf, "%s(%s)", ar, h.size); + symlook(strdup(buf), S_TIME, (void *)t)->value = (void *)t; + t = atol(h.size); + if(t&01) t++; + LSEEK(fd, t, 1); + } + close(fd); +} + +static int +type(char *file) +{ + int fd; + char buf[SARMAG]; + + fd = open(file, OREAD); + if(fd < 0){ + if(symlook(file, S_BITCH, 0) == 0){ + Bprint(&bout, "%s doesn't exist: assuming it will be an archive\n", file); + symlook(file, S_BITCH, (void *)file); + } + return 1; + } + if(read(fd, buf, SARMAG) != SARMAG){ + close(fd); + return 0; + } + close(fd); + return !strncmp(ARMAG, buf, SARMAG); +} + +static char* +split(char *name, char **member) +{ + char *p, *q; + + p = strdup(name); + q = utfrune(p, '('); + if(q){ + *q++ = 0; + if(member) + *member = q; + q = utfrune(q, ')'); + if (q) + *q = 0; + if(type(p)) + return p; + free(p); + fprint(2, "mk: '%s' is not an archive\n", name); + } + return 0; +} |